3051
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Yuan M, Quan LN, Comin R, Walters G, Sabatini R, Voznyy O, Hoogland S, Zhao Y, Beauregard EM, Kanjanaboos P, Lu Z, Kim DH, Sargent EH. Perovskite energy funnels for efficient light-emitting diodes. NATURE NANOTECHNOLOGY 2016; 11:872-877. [PMID: 27347835 DOI: 10.1038/nnano.2016.110] [Citation(s) in RCA: 907] [Impact Index Per Article: 113.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 05/20/2016] [Indexed: 05/20/2023]
Abstract
Organometal halide perovskites exhibit large bulk crystal domain sizes, rare traps, excellent mobilities and carriers that are free at room temperature-properties that support their excellent performance in charge-separating devices. In devices that rely on the forward injection of electrons and holes, such as light-emitting diodes (LEDs), excellent mobilities contribute to the efficient capture of non-equilibrium charge carriers by rare non-radiative centres. Moreover, the lack of bound excitons weakens the competition of desired radiative (over undesired non-radiative) recombination. Here we report a perovskite mixed material comprising a series of differently quantum-size-tuned grains that funnels photoexcitations to the lowest-bandgap light-emitter in the mixture. The materials function as charge carrier concentrators, ensuring that radiative recombination successfully outcompetes trapping and hence non-radiative recombination. We use the new material to build devices that exhibit an external quantum efficiency (EQE) of 8.8% and a radiance of 80 W sr-1 m-2. These represent the brightest and most efficient solution-processed near-infrared LEDs to date.
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Affiliation(s)
- Mingjian Yuan
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
| | - Li Na Quan
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
- Department of Chemistry and Nano Science, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Riccardo Comin
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
| | - Grant Walters
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
| | - Randy Sabatini
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
| | - Oleksandr Voznyy
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
| | - Sjoerd Hoogland
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
| | - Yongbiao Zhao
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
- Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4, Canada
| | - Eric M Beauregard
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
| | - Pongsakorn Kanjanaboos
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
| | - Zhenghong Lu
- Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4, Canada
| | - Dong Ha Kim
- Department of Chemistry and Nano Science, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada
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3052
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Tong Y, Bladt E, Aygüler MF, Manzi A, Milowska KZ, Hintermayr VA, Docampo P, Bals S, Urban AS, Polavarapu L, Feldmann J. Starke Lumineszenz in Nanokristallen aus Caesiumbleihalogenid- Perowskit mit durchstimmbarer Zusammensetzung und Dicke mittels Ultraschalldispersion. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605909] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yu Tong
- Chair for Photonics and Optoelectronics, Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstr. 54 80799 München Deutschland
- Nanosystems Initiative Munich (NIM); Schellingstraße 4 80799 München Deutschland
| | - Eva Bladt
- EMAT; University of Antwerp; Groenenborgerlaan 171 B-2020 Antwerp Belgien
| | - Meltem F. Aygüler
- Department of Chemistry and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität (LMU); Butenandtstraße 5-13 81377 München Deutschland
| | - Aurora Manzi
- Chair for Photonics and Optoelectronics, Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstr. 54 80799 München Deutschland
- Nanosystems Initiative Munich (NIM); Schellingstraße 4 80799 München Deutschland
| | - Karolina Z. Milowska
- Department of Materials Science and Metallurgy; University of Cambridge; 27 Charles Babbage Rd Cambridge CB3 0FS Großbritannien
| | - Verena A. Hintermayr
- Chair for Photonics and Optoelectronics, Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstr. 54 80799 München Deutschland
| | - Pablo Docampo
- Department of Chemistry and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität (LMU); Butenandtstraße 5-13 81377 München Deutschland
| | - Sara Bals
- EMAT; University of Antwerp; Groenenborgerlaan 171 B-2020 Antwerp Belgien
| | - Alexander S. Urban
- Chair for Photonics and Optoelectronics, Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstr. 54 80799 München Deutschland
- Nanosystems Initiative Munich (NIM); Schellingstraße 4 80799 München Deutschland
| | - Lakshminarayana Polavarapu
- Chair for Photonics and Optoelectronics, Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstr. 54 80799 München Deutschland
- Nanosystems Initiative Munich (NIM); Schellingstraße 4 80799 München Deutschland
| | - Jochen Feldmann
- Chair for Photonics and Optoelectronics, Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstr. 54 80799 München Deutschland
- Nanosystems Initiative Munich (NIM); Schellingstraße 4 80799 München Deutschland
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3053
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Tong Y, Bladt E, Aygüler MF, Manzi A, Milowska KZ, Hintermayr VA, Docampo P, Bals S, Urban AS, Polavarapu L, Feldmann J. Highly Luminescent Cesium Lead Halide Perovskite Nanocrystals with Tunable Composition and Thickness by Ultrasonication. Angew Chem Int Ed Engl 2016; 55:13887-13892. [DOI: 10.1002/anie.201605909] [Citation(s) in RCA: 501] [Impact Index Per Article: 62.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 08/11/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Yu Tong
- Chair for Photonics and Optoelectronics; Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstrasse 54 80799 Munich Germany
- Nanosystems Initiative Munich (NIM); Schellingstrasse 4 80799 Munich Germany
| | - Eva Bladt
- EMAT; University of Antwerp; Groenenborgerlaan 171 B-2020 Antwerp Belgium
| | - Meltem F. Aygüler
- Department of Chemistry and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität (LMU); Butenandtstrasse 5-13 81377 Munich Germany
| | - Aurora Manzi
- Chair for Photonics and Optoelectronics; Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstrasse 54 80799 Munich Germany
- Nanosystems Initiative Munich (NIM); Schellingstrasse 4 80799 Munich Germany
| | - Karolina Z. Milowska
- Department of Materials Science and Metallurgy; University of Cambridge; 27 Charles Babbage Rd Cambridge CB3 0FS UK
| | - Verena A. Hintermayr
- Chair for Photonics and Optoelectronics; Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstrasse 54 80799 Munich Germany
| | - Pablo Docampo
- Department of Chemistry and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität (LMU); Butenandtstrasse 5-13 81377 Munich Germany
| | - Sara Bals
- EMAT; University of Antwerp; Groenenborgerlaan 171 B-2020 Antwerp Belgium
| | - Alexander S. Urban
- Chair for Photonics and Optoelectronics; Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstrasse 54 80799 Munich Germany
- Nanosystems Initiative Munich (NIM); Schellingstrasse 4 80799 Munich Germany
| | - Lakshminarayana Polavarapu
- Chair for Photonics and Optoelectronics; Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstrasse 54 80799 Munich Germany
- Nanosystems Initiative Munich (NIM); Schellingstrasse 4 80799 Munich Germany
| | - Jochen Feldmann
- Chair for Photonics and Optoelectronics; Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstrasse 54 80799 Munich Germany
- Nanosystems Initiative Munich (NIM); Schellingstrasse 4 80799 Munich Germany
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3054
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Zhang D, Yu Y, Bekenstein Y, Wong AB, Alivisatos AP, Yang P. Ultrathin Colloidal Cesium Lead Halide Perovskite Nanowires. J Am Chem Soc 2016; 138:13155-13158. [PMID: 27673493 DOI: 10.1021/jacs.6b08373] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Highly uniform single crystal ultrathin CsPbBr3 nanowires (NWs) with diameter of 2.2 ± 0.2 nm and length up to several microns were successfully synthesized and purified using a catalyst-free colloidal synthesis method followed by a stepwise purification strategy. The NWs have bright photoluminescence (PL) with a photoluminescence quantum yield (PLQY) of about 30% after surface treatment. Large blue-shifted UV-vis absorption and PL spectra have been observed due to strong two-dimensional quantum confinement effects. A small angle X-ray scattering (SAXS) pattern shows the periodic packing of the ultrathin NWs along the radial direction, demonstrates the narrow radial distribution of the wires, and emphasizes the deep intercalation of the surfactants. Despite the extreme aspect ratios of the ultrathin NWs, their composition and the resulting optical properties can be readily tuned by an anion-exchange reaction with good morphology preservation. These bright ultrathin NWs may be used as a model system to study strong quantum confinement effects in a one-dimensional halide perovskite system.
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Affiliation(s)
- Dandan Zhang
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Yi Yu
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Yehonadav Bekenstein
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.,Kavli Energy NanoScience Institute , Berkeley, California 94720, United States
| | - Andrew B Wong
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - A Paul Alivisatos
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.,Kavli Energy NanoScience Institute , Berkeley, California 94720, United States
| | - Peidong Yang
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.,Kavli Energy NanoScience Institute , Berkeley, California 94720, United States
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3055
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Imran M, Di Stasio F, Dang Z, Canale C, Khan AH, Shamsi J, Brescia R, Prato M, Manna L. Colloidal Synthesis of Strongly Fluorescent CsPbBr 3 Nanowires with Width Tunable down to the Quantum Confinement Regime. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2016; 28:6450-6454. [PMID: 29225419 PMCID: PMC5716441 DOI: 10.1021/acs.chemmater.6b03081] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 08/26/2016] [Indexed: 05/23/2023]
Affiliation(s)
- Muhammad Imran
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Francesco Di Stasio
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
| | - Zhiya Dang
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
| | - Claudio Canale
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
| | - Ali Hossain Khan
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
| | - Javad Shamsi
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Rosaria Brescia
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
| | - Mirko Prato
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry and Nanophysics Departments, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
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3056
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Abstract
Twenty years after layer-type metal halide perovskites were successfully developed, 3D metal halide perovskites (shortly, perovskites) were recently rediscovered and are attracting multidisciplinary interest from physicists, chemists, and material engineers. Perovskites have a crystal structure composed of five atoms per unit cell (ABX3) with cation A positioned at a corner, metal cation B at the center, and halide anion X at the center of six planes and unique optoelectronic properties determined by the crystal structure. Because of very narrow spectra (full width at half-maximum ≤20 nm), which are insensitive to the crystallite/grain/particle dimension and wide wavelength range (400 nm ≤ λ ≤ 780 nm), perovskites are expected to be promising high-color purity light emitters that overcome inherent problems of conventional organic and inorganic quantum dot emitters. Within the last 2 y, perovskites have already demonstrated their great potential in light-emitting diodes by showing high electroluminescence efficiency comparable to those of organic and quantum dot light-emitting diodes. This article reviews the progress of perovskite emitters in two directions of bulk perovskite polycrystalline films and perovskite nanoparticles, describes current challenges, and suggests future research directions for researchers to encourage them to collaborate and to make a synergetic effect in this rapidly emerging multidisciplinary field.
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3057
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Castañeda JA, Nagamine G, Yassitepe E, Bonato LG, Voznyy O, Hoogland S, Nogueira AF, Sargent EH, Cruz CHB, Padilha LA. Efficient Biexciton Interaction in Perovskite Quantum Dots Under Weak and Strong Confinement. ACS NANO 2016; 10:8603-9. [PMID: 27574807 DOI: 10.1021/acsnano.6b03908] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Cesium lead halide perovskite quantum dots (PQDs) have emerged as a promising new platform for lighting applications. However, to date, light emitting diodes (LED) based on these materials exhibit limited efficiencies. One hypothesized limiting factor is fast nonradiative multiexciton Auger recombination. Using ultrafast spectroscopic techniques, we investigate multicarrier interaction and recombination mechanisms in cesium lead halide PQDs. By mapping the dependence of the biexciton Auger lifetime and the biexciton binding energy on nanomaterial size and composition, we find unusually strong Coulomb interactions among multiexcitons in PQDs. This results in weakly emissive biexcitons and trions, and accounts for low light emission efficiencies. We observe that, for strong confinement, the biexciton lifetime depends linearly on the PQD volume. This dependence becomes sublinear in the weak confinement regime as the PQD size increases beyond the Bohr radius. We demonstrate that Auger recombination is faster in PQDs compared to CdSe nanoparticles having the same volume, suggesting a stronger Coulombic interaction in the PQDs. We confirm this by demonstrating an increased biexciton binding energy, which reaches a maximum of about 100 meV, fully three times larger than in CdSe quantum dots. The biexciton shift can lead to low-threshold optical gain in these materials. These findings also suggest that materials engineering to reduce Coulombic interaction in cesium lead halide PQDs could improve prospects for high efficiency optoelectronic devices. Core-shell structures, in particular type-II nanostructures, which are known to reduce the bandedge Coulomb interaction in CdSe/CdS, could beneficially be applied to PQDs with the goal of increasing their potential in lighting applications.
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Affiliation(s)
- Juan A Castañeda
- Instituto de Fisica "Gleb Wataghin", Universidade Estadual de Campinas, UNICAMP , P.O. Box 6165, 13083-859 Campinas, São Paulo, Brazil
| | - Gabriel Nagamine
- Instituto de Fisica "Gleb Wataghin", Universidade Estadual de Campinas, UNICAMP , P.O. Box 6165, 13083-859 Campinas, São Paulo, Brazil
| | - Emre Yassitepe
- Instituto de Quimica, Universidade Estadual de Campinas, UNICAMP , P.O. Box 6154, 13084-971 Campinas, São Paulo, Brazil
| | - Luiz G Bonato
- Instituto de Quimica, Universidade Estadual de Campinas, UNICAMP , P.O. Box 6154, 13084-971 Campinas, São Paulo, Brazil
| | - Oleksandr Voznyy
- Department of Electrical and Computer Engineering, University of Toronto , 10 Kings College Road, Toronto, Ontario M5S 3G4, Canada
| | - Sjoerd Hoogland
- Department of Electrical and Computer Engineering, University of Toronto , 10 Kings College Road, Toronto, Ontario M5S 3G4, Canada
| | - Ana F Nogueira
- Instituto de Quimica, Universidade Estadual de Campinas, UNICAMP , P.O. Box 6154, 13084-971 Campinas, São Paulo, Brazil
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto , 10 Kings College Road, Toronto, Ontario M5S 3G4, Canada
| | - Carlos H Brito Cruz
- Instituto de Fisica "Gleb Wataghin", Universidade Estadual de Campinas, UNICAMP , P.O. Box 6165, 13083-859 Campinas, São Paulo, Brazil
| | - Lazaro A Padilha
- Instituto de Fisica "Gleb Wataghin", Universidade Estadual de Campinas, UNICAMP , P.O. Box 6165, 13083-859 Campinas, São Paulo, Brazil
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3058
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Leppert L, Reyes-Lillo SE, Neaton JB. Electric Field- and Strain-Induced Rashba Effect in Hybrid Halide Perovskites. J Phys Chem Lett 2016; 7:3683-9. [PMID: 27577732 DOI: 10.1021/acs.jpclett.6b01794] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- Linn Leppert
- Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Department of Physics, University of California Berkeley , Berkeley, California 94720, United States
| | - Sebastian E Reyes-Lillo
- Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Department of Physics, University of California Berkeley , Berkeley, California 94720, United States
| | - Jeffrey B Neaton
- Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Department of Physics, University of California Berkeley , Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute at Berkeley , Berkeley, California 94720, United States
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3059
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Park K, Lee JW, Kim JD, Han NS, Jang DM, Jeong S, Park J, Song JK. Light-Matter Interactions in Cesium Lead Halide Perovskite Nanowire Lasers. J Phys Chem Lett 2016; 7:3703-10. [PMID: 27594046 DOI: 10.1021/acs.jpclett.6b01821] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Light-matter interactions in inorganic perovskite nanolasers are investigated using single-crystalline cesium lead halide (CsPbX3, X = Cl, Br, and I) nanowires synthesized by the chemical vapor transport method. The perovskite nanowires exhibit a uniform growth direction, smooth surfaces, straight end facets, and homogeneous composition distributions. Lasing occurs in the perovskite nanowires at low thresholds (3 μJ/cm(2)) with high quality factors (Q = 1200-1400) under ambient atmospheric environments. The wavelengths of the nanowire lasers are tunable by controlling the stoichiometry of the halide, allowing the lasing of the inorganic perovskite nanowires from blue to red. The unusual spacing of the Fabry-Pérot modes suggests strong light-matter interactions in the reduced mode volume of the nanowires, while the polarization of the lasing indicates that the Fabry-Pérot modes belong to the same fundamental transverse mode. The dispersion curve of the exciton-polariton model suggests that the group refractive index of the polariton is significantly enhanced.
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Affiliation(s)
- Kidong Park
- Department of Chemistry, Korea University , Jochiwon 339-700, Korea
| | - Jong Woon Lee
- Department of Chemistry, Kyung Hee University , Seoul 130-701, Korea
| | - Jun Dong Kim
- Department of Chemistry, Korea University , Jochiwon 339-700, Korea
| | - Noh Soo Han
- Department of Chemistry, Kyung Hee University , Seoul 130-701, Korea
| | - Dong Myung Jang
- Department of Chemistry, Korea University , Jochiwon 339-700, Korea
| | - Seonghyun Jeong
- Department of Chemistry, Kyung Hee University , Seoul 130-701, Korea
| | - Jeunghee Park
- Department of Chemistry, Korea University , Jochiwon 339-700, Korea
| | - Jae Kyu Song
- Department of Chemistry, Kyung Hee University , Seoul 130-701, Korea
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3060
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Dirin D, Protesescu L, Trummer D, Kochetygov IV, Yakunin S, Krumeich F, Stadie NP, Kovalenko MV. Harnessing Defect-Tolerance at the Nanoscale: Highly Luminescent Lead Halide Perovskite Nanocrystals in Mesoporous Silica Matrixes. NANO LETTERS 2016; 16:5866-74. [PMID: 27550860 PMCID: PMC5799875 DOI: 10.1021/acs.nanolett.6b02688] [Citation(s) in RCA: 240] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 08/21/2016] [Indexed: 05/19/2023]
Abstract
Colloidal lead halide perovskite nanocrystals (NCs) have recently emerged as a novel class of bright emitters with pure colors spanning the entire visible spectral range. Contrary to conventional quantum dots, such as CdSe and InP NCs, perovskite NCs feature unusual, defect-tolerant photophysics. Specifically, surface dangling bonds and intrinsic point defects such as vacancies do not form midgap states, known to trap carriers and thereby quench photoluminescence (PL). Accordingly, perovskite NCs need not be electronically surface-passivated (with, for instance, ligands and wider-gap materials) and do not noticeably suffer from photo-oxidation. Novel opportunities for their preparation therefore can be envisaged. Herein, we show that the infiltration of perovskite precursor solutions into the pores of mesoporous silica, followed by drying, leads to the template-assisted formation of perovskite NCs. The most striking outcome of this simple methodology is very bright PL with quantum efficiencies exceeding 50%. This facile strategy can be applied to a large variety of perovskite compounds, hybrid and fully inorganic, with the general formula APbX3, where A is cesium (Cs), methylammonium (MA), or formamidinium (FA), and X is Cl, Br, I or a mixture thereof. The luminescent properties of the resulting templated NCs can be tuned by both quantum size effects as well as composition. Also exhibiting intrinsic haze due to scattering within the composite, such materials may find applications as replacements for conventional phosphors in liquid-crystal television display technologies and in related luminescence down-conversion-based devices.
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Affiliation(s)
- Dmitry
N. Dirin
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa—Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Loredana Protesescu
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa—Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - David Trummer
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Ilia V. Kochetygov
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Sergii Yakunin
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa—Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Frank Krumeich
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Nicholas P. Stadie
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa—Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Maksym V. Kovalenko
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa—Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
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3061
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Koscher BA, Bronstein ND, Olshansky JH, Bekenstein Y, Alivisatos AP. Surface- vs Diffusion-Limited Mechanisms of Anion Exchange in CsPbBr3 Nanocrystal Cubes Revealed through Kinetic Studies. J Am Chem Soc 2016; 138:12065-8. [DOI: 10.1021/jacs.6b08178] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Brent A. Koscher
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli
Energy NanoScience Institute, University of California, Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Noah D. Bronstein
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli
Energy NanoScience Institute, University of California, Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jacob H. Olshansky
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli
Energy NanoScience Institute, University of California, Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Yehonadav Bekenstein
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli
Energy NanoScience Institute, University of California, Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - A. Paul Alivisatos
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli
Energy NanoScience Institute, University of California, Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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3062
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Huang H, Chen B, Wang Z, Hung TF, Susha AS, Zhong H, Rogach AL. Water resistant CsPbX 3 nanocrystals coated with polyhedral oligomeric silsesquioxane and their use as solid state luminophores in all-perovskite white light-emitting devices. Chem Sci 2016; 7:5699-5703. [PMID: 30034709 PMCID: PMC6022059 DOI: 10.1039/c6sc01758d] [Citation(s) in RCA: 252] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 06/11/2016] [Indexed: 12/19/2022] Open
Abstract
We present an approach towards stable solid-state perovskite based luminophores with different emission colors via surface protection of CsPbX3 (X = Br or I) with a polyhedral oligomeric silsesquioxane (POSS). This treatment results in water resistant perovskite nanocrystal powders, and prevents otherwise easy anion exchange between perovskite nanocrystals of different compositions mixed together in the solid state, which allows us to preserve their distinct emission spectra. We subsequently used mixtures of green-emitting POSS-CsPbBr3 and red-emitting POSS-CsPb(Br/I)3 nanocrystal powders to fabricate single layer all-perovskite down conversion white light-emitting devices.
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Affiliation(s)
- He Huang
- Department of Physics and Materials Science , Centre for Functional Photonics (CFP) , City University of Hong Kong , 83 Tat Chee Avenue , Kowloon , Hong Kong , China .
| | - Bingkun Chen
- Department of Physics and Materials Science , Centre for Functional Photonics (CFP) , City University of Hong Kong , 83 Tat Chee Avenue , Kowloon , Hong Kong , China .
- Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems , School of Materials Science & Engineering , Beijing Institute of Technology , Beijing , 100081 , China
| | - Zhenguang Wang
- Department of Physics and Materials Science , Centre for Functional Photonics (CFP) , City University of Hong Kong , 83 Tat Chee Avenue , Kowloon , Hong Kong , China .
| | - Tak Fu Hung
- Department of Physics and Materials Science , Centre for Functional Photonics (CFP) , City University of Hong Kong , 83 Tat Chee Avenue , Kowloon , Hong Kong , China .
| | - Andrei S Susha
- Department of Physics and Materials Science , Centre for Functional Photonics (CFP) , City University of Hong Kong , 83 Tat Chee Avenue , Kowloon , Hong Kong , China .
| | - Haizheng Zhong
- Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems , School of Materials Science & Engineering , Beijing Institute of Technology , Beijing , 100081 , China
| | - Andrey L Rogach
- Department of Physics and Materials Science , Centre for Functional Photonics (CFP) , City University of Hong Kong , 83 Tat Chee Avenue , Kowloon , Hong Kong , China .
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3063
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Semonin OE, Elbaz GA, Straus DB, Hull TD, Paley DW, van der Zande AM, Hone JC, Kymissis I, Kagan CR, Roy X, Owen JS. Limits of Carrier Diffusion in n-Type and p-Type CH3NH3PbI3 Perovskite Single Crystals. J Phys Chem Lett 2016; 7:3510-3518. [PMID: 27525491 DOI: 10.1021/acs.jpclett.6b01308] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
| | | | | | | | | | - Arend M van der Zande
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | | | | | - Cherie R Kagan
- Department of Electrical and Systems Engineering, ⊗Department of Material Science and Engineering, and #Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
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3064
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Bhooshan Kumar V, Gouda L, Porat Z, Gedanken A. Sonochemical synthesis of CH3NH3PbI3 perovskite ultrafine nanocrystal sensitizers for solar energy applications. ULTRASONICS SONOCHEMISTRY 2016; 32:54-59. [PMID: 27150745 DOI: 10.1016/j.ultsonch.2016.02.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 02/07/2016] [Accepted: 02/07/2016] [Indexed: 06/05/2023]
Abstract
The organic-inorganic hybrid perovskite CH3NH3PbI3 is becoming an interesting material in the field of energy harvesting. This material is one of the cleanest and cheapest components in solar cells which is available in ample amounts. However, most of the previous research work was done on thin film of this material. In the present work we describe the preparation of a powder containing nanoparticles of CH3NH3PbI3 using a sonochemical method. Characterization of the product was done by various methods, such as HRTEM, FTIR, PL, DLS and XRD. The particles were found to be highly crystalline (tetragonal crystal structure), polygonal in shape and having diameters of 10-40nm.
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Affiliation(s)
- Vijay Bhooshan Kumar
- Bar-Ilan Institute for Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Laxman Gouda
- Bar-Ilan Institute for Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Ze'ev Porat
- Division of Chemistry, Nuclear Research Center-Negev, P.O. Box 9001, Be'er-Sheva 84190, Israel; Institutes of Applied Research, Ben-Gurion University of the Negev, Be'er-Sheva 841051, Israel
| | - Aharon Gedanken
- Bar-Ilan Institute for Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel; National Cheng Kung University, Department of Materials Science & Engineering, Tainan 70101, Taiwan.
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3065
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Fu Y, Zhu H, Stoumpos CC, Ding Q, Wang J, Kanatzidis MG, Zhu X, Jin S. Broad Wavelength Tunable Robust Lasing from Single-Crystal Nanowires of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, I). ACS NANO 2016; 10:7963-72. [PMID: 27437566 DOI: 10.1021/acsnano.6b03916] [Citation(s) in RCA: 214] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Lead halide perovskite nanowires (NWs) are emerging as a class of inexpensive semiconductors with broad bandgap tunability for optoelectronics, such as tunable NW lasers. Despite exciting progress, the current organic-inorganic hybrid perovskite NW lasers suffer from limited tunable wavelength range and poor material stability. Herein, we report facile solution growth of single-crystal NWs of inorganic perovskite CsPbX3 (X = Br, Cl) and their alloys [CsPb(Br,Cl)3] and a low-temperature vapor-phase halide exchange method to convert CsPbBr3 NWs into perovskite phase CsPb(Br,I)3 alloys and metastable CsPbI3 with well-preserved perovskite crystal lattice and NW morphology. These single crystalline NWs with smooth end facets and subwavelength dimensions are ideal Fabry-Perot cavities for NW lasers. Optically pumped tunable lasing across the entire visible spectrum (420-710 nm) is demonstrated at room temperature from these NWs with low lasing thresholds and high-quality factors. Such highly efficient lasing similar to what can be achieved with organic-inorganic hybrid perovskites indicates that organic cation is not essential for light emission application from these lead halide perovskite materials. Furthermore, the CsPbBr3 NW lasers show stable lasing emission with no measurable degradation after at least 8 h or 7.2 × 10(9) laser shots under continuous illumination, which are substantially more robust than their organic-inorganic counterparts. The Cs-based perovskites offer a stable material platform for tunable NW lasers and other nanoscale optoelectronic devices.
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Affiliation(s)
- Yongping Fu
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Haiming Zhu
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | | | - Qi Ding
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jue Wang
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Mercouri G Kanatzidis
- Department of Chemistry, Northwestern University , Evanston, Illinois 60201, United States
| | - Xiaoyang Zhu
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Song Jin
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
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3066
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Pan A, He B, Fan X, Liu Z, Urban JJ, Alivisatos AP, He L, Liu Y. Insight into the Ligand-Mediated Synthesis of Colloidal CsPbBr3 Perovskite Nanocrystals: The Role of Organic Acid, Base, and Cesium Precursors. ACS NANO 2016; 10:7943-54. [PMID: 27479080 DOI: 10.1021/acsnano.6b03863] [Citation(s) in RCA: 324] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
While convenient solution-based procedures have been realized for the synthesis of colloidal perovskite nanocrystals, the impact of surfactant ligands on the shape, size, and surface properties still remains poorly understood, which calls for a more detailed structure-morphology study. Herein we have systematically varied the hydrocarbon chain composition of carboxylic acids and amines to investigate the surface chemistry and the independent impact of acid and amine on the size and shape of perovskite nanocrystals. Solution phase studies on purified nanocrystal samples by (1)H NMR and IR spectroscopies have confirmed the presence of both carboxylate and alkylammonium ligands on surfaces, with the alkylammonium ligand being much more mobile and susceptible to detachment from the nanocrystal surfaces during polar solvent washes. Moreover, the chain length variation of carboxylic acids and amines, ranging from 18 carbons down to two carbons, has shown independent correlation to the size and shape of nanocrystals in addition to the temperature effect. We have additionally demonstrated that employing a more soluble cesium acetate precursor in place of the universally used Cs2CO3 results in enhanced processability without sacrificing optical properties, thus offering a more versatile recipe for perovskite nanocrystal synthesis that allows the use of organic acids and amines bearing chains shorter than eight carbon atoms. Overall our studies have shed light on the influence of ligand chemistry on crystal growth and stabilization of the nanocrystals, which opens the door to functionalizable perovskite nanocrsytals through surface ligand manipulation.
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Affiliation(s)
- Aizhao Pan
- Department of Chemistry, School of Science, Xi'an Jiaotong University , Xianning West Road, 28, Xi'an, 710049, China
| | | | - Xiaoyun Fan
- Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
| | - Zeke Liu
- Department of Chemistry, University of California, Berkeley, and Kavli Energy NanoSciences Institute at Berkeley , Berkeley, California 94720, United States
| | | | - A Paul Alivisatos
- Department of Chemistry, University of California, Berkeley, and Kavli Energy NanoSciences Institute at Berkeley , Berkeley, California 94720, United States
| | - Ling He
- Department of Chemistry, School of Science, Xi'an Jiaotong University , Xianning West Road, 28, Xi'an, 710049, China
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3067
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Weidman MC, Seitz M, Stranks SD, Tisdale WA. Highly Tunable Colloidal Perovskite Nanoplatelets through Variable Cation, Metal, and Halide Composition. ACS NANO 2016; 10:7830-9. [PMID: 27471862 DOI: 10.1021/acsnano.6b03496] [Citation(s) in RCA: 248] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Colloidal perovskite nanoplatelets are a promising class of semiconductor nanomaterials-exhibiting bright luminescence, tunable and spectrally narrow absorption and emission features, strongly confined excitonic states, and facile colloidal synthesis. Here, we demonstrate the high degree of spectral tunability achievable through variation of the cation, metal, and halide composition as well as nanoplatelet thickness. We synthesize nanoplatelets of the form L2[ABX3]n-1BX4, where L is an organic ligand (octylammonium, butylammonium), A is a monovalent metal or organic molecular cation (cesium, methylammonium, formamidinium), B is a divalent metal cation (lead, tin), X is a halide anion (chloride, bromide, iodide), and n-1 is the number of unit cells in thickness. We show that variation of n, B, and X leads to large changes in the absorption and emission energy, while variation of the A cation leads to only subtle changes but can significantly impact the nanoplatelet stability and photoluminescence quantum yield (with values over 20%). Furthermore, mixed halide nanoplatelets exhibit continuous spectral tunability over a 1.5 eV spectral range, from 2.2 to 3.7 eV. The nanoplatelets have relatively large lateral dimensions (100 nm to 1 μm), which promote self-assembly into stacked superlattice structures-the periodicity of which can be adjusted based on the nanoplatelet surface ligand length. These results demonstrate the versatility of colloidal perovskite nanoplatelets as a material platform, with tunability extending from the deep-UV, across the visible, into the near-IR. In particular, the tin-containing nanoplatelets represent a significant addition to the small but increasingly important family of lead- and cadmium-free colloidal semiconductors.
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Affiliation(s)
| | | | - Samuel D Stranks
- Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
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3068
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Peng L, Geng J, Ai L, Zhang Y, Xie R, Yang W. Room temperature synthesis of ultra-small, near-unity single-sized lead halide perovskite quantum dots with wide color emission tunability, high color purity and high brightness. NANOTECHNOLOGY 2016; 27:335604. [PMID: 27383631 DOI: 10.1088/0957-4484/27/33/335604] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Phosphor with extremely narrow emission line widths, high brightness, and wide color emission tunability in visible regions is required for display and lighting applications, yet none has been reported in the literature so far. In the present study, single-sized lead halide perovskite (APbX 3; A = CH3NH3 and Cs; X = Cl, Br, and I) nanocrystalline (NC) phosphors were achieved for the first time in a one-pot reaction at room temperature (25 °C). The size-dependent samples, which included four families of CsPbBr3 NCs and exhibited sharp excitonic absorption peaks and pure band gap emission, were directly obtained by simply varying the concentration of ligands. The continuity of the optical spectrum can be successively tuned over the entire UV-visible spectral region (360-610 nm) by preparing CsPbCl3, CsPbI3, and CsPb(Y/Br)3 (Y = Cl and I) NCs with the use of CsPbBr3 NCs as templates by anion exchange while maintaining the size of NCs and high quantum yields of up to 80%. Notably, an emission line width of 10-24 nm, which is completely consistent with that of their single particles, indicates the formation of single-sized NCs. The versatility of the synthetic strategy was validated by extending it to the synthesis of single-sized CH3NH3PbX 3 NCs by simply replacing the cesium precursor by the CH3NH3 X precursor.
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Affiliation(s)
- Lucheng Peng
- Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
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3069
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Mittal M, Jana A, Sarkar S, Mahadevan P, Sapra S. Size of the Organic Cation Tunes the Band Gap of Colloidal Organolead Bromide Perovskite Nanocrystals. J Phys Chem Lett 2016; 7:3270-7. [PMID: 27494515 DOI: 10.1021/acs.jpclett.6b01406] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A few approaches have been employed to tune the band gap of colloidal organic-inorganic trihalide perovskites (OTPs) nanocrystals by changing the halide anion. However, to date, there is no report of electronic structure tuning of perovskite NCs upon changing the organic cation. We report here, for the first time, the room temperature colloidal synthesis of (EA)x(MA)1-xPbBr3 nanocrystals (NCs) (where, x varies between 0 and 1) to tune the band gap of hybrid organic-inorganic lead perovskite NCs from 2.38 to 2.94 eV by varying the ratio of ethylammonium (EA) and methylammonium (MA) cations. The tuning of band gap is confirmed by electronic structure calculations within density functional theory, which explains the increase in the band gap upon going toward larger "A" site cations in APbBr3 NCs. The photoluminescence quantum yield (PLQY) of these NCs lies between 5% to 85% and the average lifetime falls in the range 1.4 to 215 ns. A mixture of MA cations and its higher analog EA cations provide a versatile tool to tune the structural as well as optoelectronic properties of perovskite NCs.
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Affiliation(s)
- Mona Mittal
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Atanu Jana
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Sagar Sarkar
- Department of Condensed Matter Physics and Materials Science, S. N. Bose National Centre for Basic Sciences , JD Block, Sector III, Salt Lake, Kolkata 700106, India
| | - Priya Mahadevan
- Department of Condensed Matter Physics and Materials Science, S. N. Bose National Centre for Basic Sciences , JD Block, Sector III, Salt Lake, Kolkata 700106, India
| | - Sameer Sapra
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
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3070
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Tang X, Zu Z, Shao H, Hu W, Zhou M, Deng M, Chen W, Zang Z, Zhu T, Xue J. All-inorganic perovskite CsPb(Br/I)3 nanorods for optoelectronic application. NANOSCALE 2016; 8:15158-15161. [PMID: 27500438 DOI: 10.1039/c6nr01828a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Halide perovskites have attracted great attention in recent years as promising materials for optoelectronic devices, especially inorganic perovskites like CsPbX3 (X = I, Br, Cl). Herein, CsPb(Br/I)3 nanorods with a photoluminescence (PL) spectrum located at 610 nm have been obtained by a facile hot-injection method, and the UV-vis absorption spectrum further revealed that the bandgap absorption is around 1.98 eV. Furthermore, the photoelectric response of the CsPb(Br/I)3 nanorods showed a relatively short rise-time (0.68 s) and decay-time (0.66 s), and the on/off photocurrent ratio of the CsPb(Br/I)3 nanorod based photodetector was up to 10(3).
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Affiliation(s)
- Xiaosheng Tang
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Zhiqiang Zu
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Haibing Shao
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Wei Hu
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Miao Zhou
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Ming Deng
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Weiwei Chen
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Zhigang Zang
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Tao Zhu
- Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
| | - Junmin Xue
- Department of Materials Science & Engineering, National University of Singapore, Singapore
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3071
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Koh WK, Park S, Ham Y. Phosphonic Acid Stabilized Colloidal CsPbX3(X=Br, I) Perovskite Nanocrystals and Their Surface Chemistry. ChemistrySelect 2016. [DOI: 10.1002/slct.201600809] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Weon-kyu Koh
- Device Laboratory; Samsung Advanced Institute of Technology; Suwon, Gyeonggi-do 16676 South Korea
| | - Sungjun Park
- Analytical Engineering Group; Samsung Advanced Institute of Technology; Suwon, Gyeonggi-do 16676 South Korea
| | - Yongnam Ham
- Analytical Engineering Group; Samsung Advanced Institute of Technology; Suwon, Gyeonggi-do 16676 South Korea
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3072
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Oh N, Shim M. Metal Oleate Induced Etching and Growth of Semiconductor Nanocrystals, Nanorods, and Their Heterostructures. J Am Chem Soc 2016; 138:10444-51. [DOI: 10.1021/jacs.6b03834] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Nuri Oh
- Department
of Materials Science
and Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Moonsub Shim
- Department
of Materials Science
and Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
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3073
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Wei K, Xu Z, Chen R, Zheng X, Cheng X, Jiang T. Temperature-dependent excitonic photoluminescence excited by two-photon absorption in perovskite CsPbBr 3 quantum dots. OPTICS LETTERS 2016; 41:3821-3824. [PMID: 27519098 DOI: 10.1364/ol.41.003821] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Recently, lead halide perovskite quantum dots have been reported with potential for photovoltaic and optoelectronic applications due to their excellent luminescent properties. Herein excitonic photoluminescence (PL) excited by two-photon absorption in perovskite CsPbBr3 quantum dots (QDs) has been studied at a broad temperature range, from 80 to 380 K. Two-photon absorption has been investigated and the absorption coefficient is up to 0.085 cm/GW at room temperature. Moreover, the PL spectrum excited by two-photon absorption shows a linear blue-shift (0.32 meV/K) below the temperature of 220 K. However, for higher temperatures, the PL peak approaches a roughly constant value and shows temperature-independent chromaticity up to 380 K. This behavior is distinct from the general red-shift for semiconductors and can be attributed to the result of thermal expansion, electron-phonon interaction and structural phase transition around 360 K. The strong nonlinear absorption and temperature-independent chromaticity of CsPbBr3 QDs observed in temperature range from 220 to 380 K will offer new opportunities in nonlinear photonics, light-harvesting, and light-emitting devices.
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3074
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Ravi VK, Swarnkar A, Chakraborty R, Nag A. Excellent green but less impressive blue luminescence from CsPbBr3 perovskite nanocubes and nanoplatelets. NANOTECHNOLOGY 2016; 27:325708. [PMID: 27352895 DOI: 10.1088/0957-4484/27/32/325708] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Green photoluminescence (PL) from CsPbBr3 nanocubes (∼11 nm edge-length) exhibits a high quantum yield (>80%), narrow spectral width (∼85 meV), and high reproducibility, along with a high molar extinction coefficient (3.5 × 10(6) M(-1) cm(-1)) for lowest energy excitonic absorption. In order to obtain these combinations of excellent properties for blue (PL peak maximum, λ max < 500 nm) emitting samples, CsPbBr3 nanocubes and nanoplatelets with various dimensions were prepared. Systematic increases in both the optical gap and transition probability for radiative excitonic recombination (PL lifetime 3-7 ns), have been achieved with the decreasing size of nanocubes. A high quantum yield (>80%) was also maintained, but the spectral width increased and became asymmetric for blue emitting CsPbBr3 nanocubes. Furthermore, PL was unstable and irreproducible for samples with λ max ∼ 460 nm, exhibiting multiple features in the PL. These problems arise because smaller (<7 nm) CsPbBr3 nanocubes have a tendency to form nanoplatelets and nanorods, eventually yielding inhomogeneity in the shape and size of blue-emitting nanocrystals. Reaction conditions were then modified achieving nanoplatelets, with strong quantum confinement along the thickness of the platelets, yielding blue emission. But inhomogeneity in the thickness of the nanoplatelets again broadens the PL compared to green-emitting CsPbBr3 nanocubes. Therefore, unlike high quality green emitting CsPbBr3 nanocubes, blue emitting CsPbBr3 nanocrystals of any shape need to be improved further.
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3075
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Yettapu GR, Talukdar D, Sarkar S, Swarnkar A, Nag A, Ghosh P, Mandal P. Terahertz Conductivity within Colloidal CsPbBr3 Perovskite Nanocrystals: Remarkably High Carrier Mobilities and Large Diffusion Lengths. NANO LETTERS 2016; 16:4838-48. [PMID: 27367476 DOI: 10.1021/acs.nanolett.6b01168] [Citation(s) in RCA: 214] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Colloidal CsPbBr3 perovskite nanocrystals (NCs) have emerged as an excellent light emitting material in last one year. Using time domain and time-resolved THz spectroscopy and density functional theory based calculations, we establish 3-fold free carrier recombination mechanism, namely, nonradiative Auger, bimolecular electron-hole recombination, and inefficient trap-assisted recombination in 11 nm sized colloidal CsPbBr3 NCs. Our results confirm a negligible influence of surface defects in trapping charge carriers, which in turn results into desirable intrinsic transport properties, from the perspective of device applications, such as remarkably high carrier mobility (∼4500 cm(2) V(-1) s(-1)), large diffusion length (>9.2 μm), and high luminescence quantum yield (80%). Despite being solution processed and possessing a large surface to volume ratio, this combination of high carrier mobility and diffusion length, along with nearly ideal photoluminescence quantum yield, is unique compared to any other colloidal quantum dot system.
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Affiliation(s)
- Gurivi Reddy Yettapu
- Department of Chemistry and ‡Department of Physics, Indian Institute of Science Education and Research (IISER) , Pune, India , 411008
| | - Debnath Talukdar
- Department of Chemistry and ‡Department of Physics, Indian Institute of Science Education and Research (IISER) , Pune, India , 411008
| | - Sohini Sarkar
- Department of Chemistry and ‡Department of Physics, Indian Institute of Science Education and Research (IISER) , Pune, India , 411008
| | - Abhishek Swarnkar
- Department of Chemistry and ‡Department of Physics, Indian Institute of Science Education and Research (IISER) , Pune, India , 411008
| | - Angshuman Nag
- Department of Chemistry and ‡Department of Physics, Indian Institute of Science Education and Research (IISER) , Pune, India , 411008
| | - Prasenjit Ghosh
- Department of Chemistry and ‡Department of Physics, Indian Institute of Science Education and Research (IISER) , Pune, India , 411008
| | - Pankaj Mandal
- Department of Chemistry and ‡Department of Physics, Indian Institute of Science Education and Research (IISER) , Pune, India , 411008
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3076
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Rabouw FT, de Mello Donega C. Excited-State Dynamics in Colloidal Semiconductor Nanocrystals. Top Curr Chem (Cham) 2016; 374:58. [PMID: 27573500 PMCID: PMC5480409 DOI: 10.1007/s41061-016-0060-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 07/23/2016] [Indexed: 11/29/2022]
Abstract
Colloidal semiconductor nanocrystals have attracted continuous worldwide interest over the last three decades owing to their remarkable and unique size- and shape-, dependent properties. The colloidal nature of these nanomaterials allows one to take full advantage of nanoscale effects to tailor their optoelectronic and physical–chemical properties, yielding materials that combine size-, shape-, and composition-dependent properties with easy surface manipulation and solution processing. These features have turned the study of colloidal semiconductor nanocrystals into a dynamic and multidisciplinary research field, with fascinating fundamental challenges and dazzling application prospects. This review focuses on the excited-state dynamics in these intriguing nanomaterials, covering a range of different relaxation mechanisms that span over 15 orders of magnitude, from a few femtoseconds to a few seconds after photoexcitation. In addition to reviewing the state of the art and highlighting the essential concepts in the field, we also discuss the relevance of the different relaxation processes to a number of potential applications, such as photovoltaics and LEDs. The fundamental physical and chemical principles needed to control and understand the properties of colloidal semiconductor nanocrystals are also addressed.
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Affiliation(s)
- Freddy T Rabouw
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, PO Box 80000, 3508 TA, Utrecht, The Netherlands.,Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, PO Box 80000, 3508 TA, Utrecht, The Netherlands.,Optical Materials Engineering Laboratory, ETH Zurich, 8092, Zurich, Switzerland
| | - Celso de Mello Donega
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, PO Box 80000, 3508 TA, Utrecht, The Netherlands.
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3077
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Meyns M, Perálvarez M, Heuer-Jungemann A, Hertog W, Ibáñez M, Nafria R, Genç A, Arbiol J, Kovalenko MV, Carreras J, Cabot A, Kanaras AG. Polymer-Enhanced Stability of Inorganic Perovskite Nanocrystals and Their Application in Color Conversion LEDs. ACS APPLIED MATERIALS & INTERFACES 2016; 8:19579-86. [PMID: 27454750 DOI: 10.1021/acsami.6b02529] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Cesium lead halide (CsPbX3, X = Cl, Br, I) nanocrystals (NCs) offer exceptional optical properties for several potential applications but their implementation is hindered by a low chemical and structural stability and limited processability. In the present work, we developed a new method to efficiently coat CsPbX3 NCs, which resulted in their increased chemical and optical stability as well as processability. The method is based on the incorporation of poly(maleic anhydride-alt-1-octadecene) (PMA) into the synthesis of the perovskite NCs. The presence of PMA in the ligand shell stabilizes the NCs by tightening the ligand binding, limiting in this way the NC surface interaction with the surrounding media. We further show that these NCs can be embedded in self-standing silicone/glass plates as down-conversion filters for the fabrication of monochromatic green and white light emitting diodes (LEDs) with narrow bandwidths and appealing color characteristics.
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Affiliation(s)
- Michaela Meyns
- Catalonia Institute for Energy Research-IREC , Sant Adrià de Besòs, Barcelona, 08930, Spain
| | - Mariano Perálvarez
- Catalonia Institute for Energy Research-IREC , Sant Adrià de Besòs, Barcelona, 08930, Spain
| | - Amelie Heuer-Jungemann
- Physics and Astronomy, Faculty of Physical Sciences and Engineering, University of Southampton , Highfield, Southampton, SO17 1BJ, U.K
| | - Wim Hertog
- Catalonia Institute for Energy Research-IREC , Sant Adrià de Besòs, Barcelona, 08930, Spain
| | - Maria Ibáñez
- Metallurgy and Materials Engineering Department, Faculty of Engineering, Bartin University , 74100, Bartin, Turkey
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich , CH-8093 Zurich, Switzerland
| | - Raquel Nafria
- Catalonia Institute for Energy Research-IREC , Sant Adrià de Besòs, Barcelona, 08930, Spain
| | - Aziz Genç
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and The Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 08193 Barcelona, Spain
- Metallurgy and Materials Engineering Department, Faculty of Engineering, Bartin University , 74100, Bartin, Turkey
| | - Jordi Arbiol
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and The Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 08193 Barcelona, Spain
- ICREA, Pg. , Lluís Companys 23, 8010 Barcelona, Spain
| | - Maksym V Kovalenko
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich , CH-8093 Zurich, Switzerland
| | - Josep Carreras
- Catalonia Institute for Energy Research-IREC , Sant Adrià de Besòs, Barcelona, 08930, Spain
| | - Andreu Cabot
- Catalonia Institute for Energy Research-IREC , Sant Adrià de Besòs, Barcelona, 08930, Spain
- ICREA, Pg. , Lluís Companys 23, 8010 Barcelona, Spain
| | - Antonios G Kanaras
- Physics and Astronomy, Faculty of Physical Sciences and Engineering, University of Southampton , Highfield, Southampton, SO17 1BJ, U.K
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3078
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Wang Z, Cheng T, Wang F, Dai S, Tan Z. Morphology Engineering for High-Performance and Multicolored Perovskite Light-Emitting Diodes with Simple Device Structures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:4412-4420. [PMID: 27392198 DOI: 10.1002/smll.201601785] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Indexed: 06/06/2023]
Abstract
UNLABELLED The film morphology is extremely significant for solution processed perovskite devices. Through fine morphology engineering without using any additives or further posttreatments, a full-coverage and high quantum yield perovskite film has been achieved based on one-step spin-coating method. The morphologies and film characteristics of MAPbBr3 with different MABr:PbBr2 starting material ratios are in-depth investigated by scanning electron microscopy, atomic force microscopy, X-ray diffraction, photoluminescence, and time resolved photoluminescence. High performance organometal halide perovskite light-emitting didoes (PeLEDs) based on simple device structure of indium tin oxide/poly(3,4-ethylenedioxythiophene):polystyrene sulfonate ( PEDOT PSS)/perovskite/TPBi/Ca/Al are demonstrated. The green PeLED based on MAPbBr3 shows a maximum luminance of 8794 cd m(-2) (at 7.3 V) and maximum current efficiency of 5.1 cd A(-1) (at 5.1 V). Furthermore, a class of hybrid PeLEDs by adjusting the halide ratios of methylammonium lead halide (MAPbX3 , where X is Cl, Br, or I) are also demonstrated at room temperature. These mix-halogenated PeLEDs show bright luminance (above 100 cd m(-) (2) ) with narrow and clean emission bands over the wide color gamut.
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Affiliation(s)
- Zhibin Wang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Tai Cheng
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Fuzhi Wang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Songyuan Dai
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Zhan'ao Tan
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China
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3079
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Yang GL, Zhong HZ. Organometal halide perovskite quantum dots: synthesis, optical properties, and display applications. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2016.06.047] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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3080
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Yu JC, Kim DW, Kim DB, Jung ED, Park JH, Lee AY, Lee BR, Di Nuzzo D, Friend RH, Song MH. Improving the Stability and Performance of Perovskite Light-Emitting Diodes by Thermal Annealing Treatment. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:6906-13. [PMID: 27239729 DOI: 10.1002/adma.201601105] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/23/2016] [Indexed: 05/21/2023]
Abstract
A perovskite LED with a perovskite film treated under optimum thermal annealing conditions exhibits a significantly enhanced long-term stability with full coverage of the green electroluminescence emission due to the highly uniform morphology of the perovskite film.
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Affiliation(s)
- Jae Choul Yu
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798, Republic of Korea
| | - Dae Woo Kim
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798, Republic of Korea
| | - Da Bin Kim
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798, Republic of Korea
| | - Eui Dae Jung
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798, Republic of Korea
| | - Jong Hyun Park
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798, Republic of Korea
| | - Ah-Young Lee
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798, Republic of Korea
| | - Bo Ram Lee
- Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | | | | | - Myoung Hoon Song
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798, Republic of Korea
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3081
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Veldhuis SA, Boix PP, Yantara N, Li M, Sum TC, Mathews N, Mhaisalkar SG. Perovskite Materials for Light-Emitting Diodes and Lasers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:6804-34. [PMID: 27214091 DOI: 10.1002/adma.201600669] [Citation(s) in RCA: 502] [Impact Index Per Article: 62.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 03/10/2016] [Indexed: 05/22/2023]
Abstract
Organic-inorganic hybrid perovskites have cemented their position as an exceptional class of optoelectronic materials thanks to record photovoltaic efficiencies of 22.1%, as well as promising demonstrations of light-emitting diodes, lasers, and light-emitting transistors. Perovskite materials with photoluminescence quantum yields close to 100% and perovskite light-emitting diodes with external quantum efficiencies of 8% and current efficiencies of 43 cd A(-1) have been achieved. Although perovskite light-emitting devices are yet to become industrially relevant, in merely two years these devices have achieved the brightness and efficiencies that organic light-emitting diodes accomplished in two decades. Further advances will rely decisively on the multitude of compositional, structural variants that enable the formation of lower-dimensionality layered and three-dimensional perovskites, nanostructures, charge-transport materials, and device processing with architectural innovations. Here, the rapid advancements in perovskite light-emitting devices and lasers are reviewed. The key challenges in materials development, device fabrication, operational stability are addressed, and an outlook is presented that will address market viability of perovskite light-emitting devices.
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Affiliation(s)
- Sjoerd A Veldhuis
- Energy Research Institute at Nanyang Technological University (ERI@N), Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Pablo P Boix
- Energy Research Institute at Nanyang Technological University (ERI@N), Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Natalia Yantara
- Energy Research Institute at Nanyang Technological University (ERI@N), Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Mingjie Li
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Tze Chien Sum
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Nripan Mathews
- Energy Research Institute at Nanyang Technological University (ERI@N), Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Subodh G Mhaisalkar
- Energy Research Institute at Nanyang Technological University (ERI@N), Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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3082
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Perovskite Luminescent Materials. Top Curr Chem (Cham) 2016; 374:52. [DOI: 10.1007/s41061-016-0051-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Accepted: 07/06/2016] [Indexed: 10/21/2022]
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3083
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Yoon HC, Kang H, Lee S, Oh JH, Yang H, Do YR. Study of Perovskite QD Down-Converted LEDs and Six-Color White LEDs for Future Displays with Excellent Color Performance. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18189-200. [PMID: 27349270 DOI: 10.1021/acsami.6b05468] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A narrow-emitting red, green, and blue (RGB) perovskite quantum dot (PeQD)-based tricolored display system can widen the color gamut over the National Television System Committee (NTSC) to 120%, but this value is misleading with regard to the color perception of cyan and yellow reproduced in the narrow RGB spectra. We propose that a PeQD-based six-color display system can reproduce true-to-life spectral distributions with high fidelity, widen the color gamut, and close the cyan and yellow gap in the RGB tricolored display by adding cyan (Cy), yellowish green (Yg), and orange colors (Or). In this study, we demonstrated pure-colored CsPbX3 (X = Cl, Br, I, or their halide mixtures; Cl/Br and Br/I) PeQD-based monochromatic down-converted light-emitting diodes (DC-LED) for the first time, and we incorporated PeQDs with UV-curable binders and long-wavelength-pass-dichroic filters (LPDFs). CsPbX3 PeQD-based pure Cy-, G-, Yg-, Or-, R-emitting monochromatic DC-LED provide luminous efficacy (LE) values of 81, 184, 79, 80, and 35 lm/W, respectively, at 20 mA. We also confirmed the suitability and the possibility of access to future color-by-blue backlights for field-sequential-color liquid crystal displays, using six-color multipackage white LEDs, as well as future six-colored light-emitting devices with high vision and color performance. The fabricated six-color multipackage white LEDs exhibited an appropriate LE (62 lm/W at total 120 mA), excellent color qualities (color rendering index (CRI) = 96, special CRI for red (R9) = 97) at a correlated color temperature (CCT) of 6500 K, and a wide color gamut covering the NTSC up to 145% in the 1931 Commission International de l'Eclairage (CIE) color coordinates space.
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Affiliation(s)
- Hee Chang Yoon
- Department of Chemistry, Kookmin University , Seoul 136-702, Republic of Korea
| | - Heejoon Kang
- Department of Chemistry, Kookmin University , Seoul 136-702, Republic of Korea
| | - Soyoung Lee
- Department of Chemistry, Kookmin University , Seoul 136-702, Republic of Korea
| | - Ji Hye Oh
- Department of Chemistry, Kookmin University , Seoul 136-702, Republic of Korea
| | - Heesun Yang
- Department of Materials Science and Engineering, Hongik University , Seoul 121-791, Republic of Korea
| | - Young Rag Do
- Department of Chemistry, Kookmin University , Seoul 136-702, Republic of Korea
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3084
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Park JP, Lee JJ, Kim SW. Highly luminescent InP/GaP/ZnS QDs emitting in the entire color range via a heating up process. Sci Rep 2016; 6:30094. [PMID: 27435428 PMCID: PMC4951813 DOI: 10.1038/srep30094] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 06/28/2016] [Indexed: 12/02/2022] Open
Abstract
InP-based quantum dots (QDs) have attracted much attention for use in optical applications, and several types of QDs such as InP/ZnS, InP/ZnSeS, and InP/GaP/ZnS have been developed. However, early synthetic methods that involved rapid injection at high temperatures have not been able to reproducibly produce the required optical properties. They were also not able to support commercialization efforts successfully. Herein, we introduce a simple synthetic method for InP/GaP/ZnS core/shell/shell QDs via a heating process. The reaction was completed within 0.5 h and a full color range from blue to red was achieved. For emitting blue color, t-DDT was applied to prevent particle growth. From green to orange, color variation was achieved by adjusting the quantity of myristic acid. Utilizing large quantities of gallium chloride led to red color. With this method, we produced high-quality InP/GaP/ZnS QDs (blue QY: ~40%, FWHM: 50 nm; green QY: ~85%, FWHM: 41 nm; red QY: ~60%, FWHM: 65 nm). We utilized t-DDT as a new sulfur source. Compared with n-DDT, t-DDT was more reactive, which allowed for the formation of a thicker shell.
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Affiliation(s)
- Joong Pill Park
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea
| | - Jae-Joon Lee
- Department of Energy & Materials Engineering, Dongguk University, Seoul 100-715, Korea
| | - Sang-Wook Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea
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3085
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Nasilowski M, Mahler B, Lhuillier E, Ithurria S, Dubertret B. Two-Dimensional Colloidal Nanocrystals. Chem Rev 2016; 116:10934-82. [DOI: 10.1021/acs.chemrev.6b00164] [Citation(s) in RCA: 341] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Michel Nasilowski
- Laboratoire de
Physique et d’Étude des Matériaux, PSL Research
University, CNRS UMR 8213, Sorbonne Universités UPMC Université
Paris 06, ESPCI Paris, 10 rue Vauquelin, 75005 Paris, France
| | - Benoit Mahler
- Institut
Lumière-Matière, CNRS UMR5306, Université Lyon
1, Université de Lyon, 69622 Villeurbanne
CEDEX, France
| | - Emmanuel Lhuillier
- Sorbonne Universités,
UPMC Université Paris 06, CNRS-UMR 7588, Institut des NanoSciences
de Paris, F-75005 Paris, France
| | - Sandrine Ithurria
- Laboratoire de
Physique et d’Étude des Matériaux, PSL Research
University, CNRS UMR 8213, Sorbonne Universités UPMC Université
Paris 06, ESPCI Paris, 10 rue Vauquelin, 75005 Paris, France
| | - Benoit Dubertret
- Laboratoire de
Physique et d’Étude des Matériaux, PSL Research
University, CNRS UMR 8213, Sorbonne Universités UPMC Université
Paris 06, ESPCI Paris, 10 rue Vauquelin, 75005 Paris, France
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3086
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Abolhasani M, Jensen KF. Oscillatory multiphase flow strategy for chemistry and biology. LAB ON A CHIP 2016; 16:2775-2784. [PMID: 27397146 DOI: 10.1039/c6lc00728g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Continuous multiphase flow strategies are commonly employed for high-throughput parameter screening of physical, chemical, and biological processes as well as continuous preparation of a wide range of fine chemicals and micro/nano particles with processing times up to 10 min. The inter-dependency of mixing and residence times, and their direct correlation with reactor length have limited the adaptation of multiphase flow strategies for studies of processes with relatively long processing times (0.5-24 h). In this frontier article, we describe an oscillatory multiphase flow strategy to decouple mixing and residence times and enable investigation of longer timescale experiments than typically feasible with conventional continuous multiphase flow approaches. We review current oscillatory multiphase flow technologies, provide an overview of the advancements of this relatively new strategy in chemistry and biology, and close with a perspective on future opportunities.
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Affiliation(s)
- Milad Abolhasani
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, 66-342, Cambridge, MA 02139, USA.
| | - Klavs F Jensen
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, 66-342, Cambridge, MA 02139, USA.
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3087
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Lv L, Xu Y, Fang H, Luo W, Xu F, Liu L, Wang B, Zhang X, Yang D, Hu W, Dong A. Generalized colloidal synthesis of high-quality, two-dimensional cesium lead halide perovskite nanosheets and their applications in photodetectors. NANOSCALE 2016; 8:13589-96. [PMID: 27378539 DOI: 10.1039/c6nr03428d] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
All-inorganic cesium lead halide perovskite (CsPbX3, X = Cl, Br, and I) nanocrystals (NCs) are emerging as an important class of semiconductor materials with superior photophysical properties and wide potential applications in optoelectronic devices. So far, only a few studies have been conducted to control the shape and geometry of CsPbX3 NCs. Here we report a general approach to directly synthesize two-dimensional (2D) CsPbX3 perovskite and mixed perovskite nanosheets with uniform and ultrathin thicknesses down to a few monolayers. The key to the high-yield synthesis of perovskite nanosheets is the development of a new Cs-oleate precursor. The as-synthesized CsPbX3 nanosheets exhibit bright photoluminescence with broad wavelength tunability by composition modulation. The excellent optoelectronic properties of CsPbX3 nanosheets combined with their unique 2D geometry and large lateral dimensions make them ideal building blocks for building functional devices. To demonstrate their potential applications in optoelectronics, photodetectors based on CsPbBr3 nanosheets are fabricated, which exhibit high on/off ratios with a fast response time.
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Affiliation(s)
- Longfei Lv
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China. and Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Yibing Xu
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Hehai Fang
- National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.
| | - Wenjin Luo
- National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.
| | - Fangjie Xu
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Limin Liu
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Biwei Wang
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Xianfeng Zhang
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
| | - Dong Yang
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
| | - Weida Hu
- National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.
| | - Angang Dong
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Department of Chemistry, Fudan University, Shanghai 200433, China.
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3088
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Liu Q, Wang Y, Sui N, Wang Y, Chi X, Wang Q, Chen Y, Ji W, Zou L, Zhang H. Exciton Relaxation Dynamics in Photo-Excited CsPbI3 Perovskite Nanocrystals. Sci Rep 2016; 6:29442. [PMID: 27405786 PMCID: PMC4942613 DOI: 10.1038/srep29442] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 06/20/2016] [Indexed: 12/20/2022] Open
Abstract
The exciton relaxation process of CsPbI3 perovskite nanocrystals (NCs) has been investigated by using transient absorption (TA) spectroscopy. The hot exciton relaxation process is confirmed to exist in the CsPbI3 NCs, through comparing the TA data of CsPbI3 NCs in low and high energy excitonic states. In addition, the Auger recombination and intrinsic decay paths also participate in the relaxation process of CsPbI3 NCs, even the number of exciton per NC is estimated to be less than 1. Excitation intensity-dependent TA data further confirms the existence of Auger recombination. Meanwhile, the spectral data also confirms that the weight of hot exciton also increase together with that of Auger recombination at high excitation intensity when CsPbI3 NCs in high energy excitonic states.
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Affiliation(s)
- Qinghui Liu
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Yinghui Wang
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Ning Sui
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Yanting Wang
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Xiaochun Chi
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Qianqian Wang
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Ying Chen
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Wenyu Ji
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Lu Zou
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Hanzhuang Zhang
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
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3089
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Maughan AE, Ganose AM, Bordelon MM, Miller EM, Scanlon DO, Neilson JR. Defect Tolerance to Intolerance in the Vacancy-Ordered Double Perovskite Semiconductors Cs2SnI6 and Cs2TeI6. J Am Chem Soc 2016; 138:8453-64. [PMID: 27284638 DOI: 10.1021/jacs.6b03207] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Vacancy-ordered double perovskites of the general formula A2BX6 are a family of perovskite derivatives composed of a face-centered lattice of nearly isolated [BX6] units with A-site cations occupying the cuboctahedral voids. Despite the presence of isolated octahedral units, the close-packed iodide lattice provides significant electronic dispersion, such that Cs2SnI6 has recently been explored for applications in photovoltaic devices. To elucidate the structure-property relationships of these materials, we have synthesized solid-solution Cs2Sn1-xTexI6. However, even though tellurium substitution increases electronic dispersion via closer I-I contact distances, the substitution experimentally yields insulating behavior from a significant decrease in carrier concentration and mobility. Density functional calculations of native defects in Cs2SnI6 reveal that iodine vacancies exhibit a low enthalpy of formation, and that the defect energy level is a shallow donor to the conduction band rendering the material tolerant to these defect states. The increased covalency of Te-I bonding renders the formation of iodine vacancy states unfavorable and is responsible for the reduction in conductivity upon Te substitution. Additionally, Cs2TeI6 is intolerant to the formation of these defects, because the defect level occurs deep within the band gap and thus localizes potential mobile charge carriers. In these vacancy-ordered double perovskites, the close-packed lattice of iodine provides significant electronic dispersion, while the interaction of the B- and X-site ions dictates the properties as they pertain to electronic structure and defect tolerance. This simplified perspective based on extensive experimental and theoretical analysis provides a platform from which to understand structure-property relationships in functional perovskite halides.
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Affiliation(s)
- Annalise E Maughan
- Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523-1872, United States
| | - Alex M Ganose
- University College London , Kathleen Lonsdale Materials Chemistry, Department of Chemistry, 20 Gordon Street, London WC1H 0AJ, United Kingdom.,Diamond Light Source, Ltd. , Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom
| | - Mitchell M Bordelon
- Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523-1872, United States
| | - Elisa M Miller
- Chemical and Materials Sciences Center, National Renewable Energy Laboratory , 15013 Denver West Parkway, Golden, Colorado 80401, United States
| | - David O Scanlon
- University College London , Kathleen Lonsdale Materials Chemistry, Department of Chemistry, 20 Gordon Street, London WC1H 0AJ, United Kingdom.,Diamond Light Source, Ltd. , Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom
| | - James R Neilson
- Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523-1872, United States
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3090
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Stoumpos CC, Kanatzidis MG. Halide Perovskites: Poor Man's High-Performance Semiconductors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5778-93. [PMID: 27174223 DOI: 10.1002/adma.201600265] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 03/06/2016] [Indexed: 05/02/2023]
Abstract
Halide perovskites are a rapidly developing class of medium-bandgap semiconductors which, to date, have been popularized on account of their remarkable success in solid-state heterojunction solar cells raising the photovoltaic efficiency to 20% within the last 5 years. As the physical properties of the materials are being explored, it is becoming apparent that the photovoltaic performance of the halide perovskites is just but one aspect of the wealth of opportunities that these compounds offer as high-performance semiconductors. From unique optical and electrical properties stemming from their characteristic electronic structure to highly efficient real-life technological applications, halide perovskites constitute a brand new class of materials with exotic properties awaiting discovery. The nature of halide perovskites from the materials' viewpoint is discussed here, enlisting the most important classes of the compounds and describing their most exciting properties. The topics covered focus on the optical and electrical properties highlighting some of the milestone achievements reported to date but also addressing controversies in the vastly expanding halide perovskite literature.
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3091
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Hoffman JB, Schleper AL, Kamat PV. Transformation of Sintered CsPbBr3 Nanocrystals to Cubic CsPbI3 and Gradient CsPbBrxI3–x through Halide Exchange. J Am Chem Soc 2016; 138:8603-11. [DOI: 10.1021/jacs.6b04661] [Citation(s) in RCA: 273] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jacob B. Hoffman
- Radiation Laboratory, †Department of Chemistry
and Biochemistry, and §Department of
Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - A. Lennart Schleper
- Radiation Laboratory, †Department of Chemistry
and Biochemistry, and §Department of
Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Prashant V. Kamat
- Radiation Laboratory, †Department of Chemistry
and Biochemistry, and §Department of
Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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3092
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Doane TL, Ryan KL, Pathade L, Cruz KJ, Zang H, Cotlet M, Maye MM. Using Perovskite Nanoparticles as Halide Reservoirs in Catalysis and as Spectrochemical Probes of Ions in Solution. ACS NANO 2016; 10:5864-72. [PMID: 27149396 DOI: 10.1021/acsnano.6b00806] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The ability of cesium lead halide (CsPbX3; X = Cl(-), Br(-), I(-)) perovskite nanoparticles (P-NPs) to participate in halide exchange reactions, to catalyze Finkelstein organohalide substitution reactions, and to colorimetrically monitor chemical reactions and detect anions in real time is described. With the use of tetraoctylammonium halide salts as a starting point, halide exchange with the P-NPs was performed to calibrate reactivity, stability, and extent of ion exchange. The exchange of CsPbI3 with Cl(-) or Br(-) causes a significant blue-shift in absorption and photoluminescence, whereas reacting I(-) with CsPbBr3 causes a red-shift of similar magnitudes. With the high local halide concentrations and the facile nature of halide exchange in mind, we then explored the ability of P-NPs to catalyze organohalide exchange in Finkelstein like reactions. Results indicate that the P-NPs serve as excellent halide reservoirs for substitution of organohalides in nonpolar media, leading to not only different organohalide products, but also a complementary color change over the course of the reaction, which can be used to monitor kinetics in a precise manner. The merits of using P-NP as spectrochemical probes for real time assaying is then expanded to other anions which can react with, or result in unique, classes of perovskites.
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Affiliation(s)
- Tennyson L Doane
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Kayla L Ryan
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Laxmikant Pathade
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Kevin J Cruz
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Huidong Zang
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Mircea Cotlet
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Mathew M Maye
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
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3093
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Manser JS, Christians JA, Kamat PV. Intriguing Optoelectronic Properties of Metal Halide Perovskites. Chem Rev 2016; 116:12956-13008. [DOI: 10.1021/acs.chemrev.6b00136] [Citation(s) in RCA: 1067] [Impact Index Per Article: 133.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph S. Manser
- Radiation
Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jeffrey A. Christians
- Radiation
Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Prashant V. Kamat
- Radiation
Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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3094
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Affiliation(s)
- Joseph S. Manser
- Radiation
Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jeffrey A. Christians
- Radiation
Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Prashant V. Kamat
- Radiation
Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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3095
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Ramasamy P, Lim DH, Kim B, Lee SH, Lee MS, Lee JS. All-inorganic cesium lead halide perovskite nanocrystals for photodetector applications. Chem Commun (Camb) 2016; 52:2067-70. [PMID: 26688424 DOI: 10.1039/c5cc08643d] [Citation(s) in RCA: 369] [Impact Index Per Article: 46.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Herein, we describe simple, fast and reproducible halide ion exchange reactions in CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) at room temperature. Through the simple adjustment of the halide ion concentration, the photoluminescence of these NCs can be tuned over the entire visible region (425-655 nm). Photodetector devices based on entirely inorganic CsPbI3 NCs are demonstrated for the first time. The photodetectors exhibited a good on/off photocurrent ratio of 10(5).
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Affiliation(s)
- Parthiban Ramasamy
- Department of Energy Systems Engineering, DGIST, Daegu, 711-873, Republic of Korea.
| | - Da-Hye Lim
- Department of Energy Systems Engineering, DGIST, Daegu, 711-873, Republic of Korea.
| | - Bumjin Kim
- Department of Energy Systems Engineering, DGIST, Daegu, 711-873, Republic of Korea.
| | - Seung-Ho Lee
- Department of Energy Systems Engineering, DGIST, Daegu, 711-873, Republic of Korea.
| | - Min-Sang Lee
- Ecolumy Co., Ltd. University-Industry Cooperation Center, DGIST, Daegu, 711-873, Republic of Korea
| | - Jong-Soo Lee
- Department of Energy Systems Engineering, DGIST, Daegu, 711-873, Republic of Korea.
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3096
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Shamsi J, Dang Z, Bianchini P, Canale C, Stasio FD, Brescia R, Prato M, Manna L. Colloidal Synthesis of Quantum Confined Single Crystal CsPbBr3 Nanosheets with Lateral Size Control up to the Micrometer Range. J Am Chem Soc 2016; 138:7240-3. [PMID: 27228475 PMCID: PMC4995059 DOI: 10.1021/jacs.6b03166] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Indexed: 12/22/2022]
Abstract
We report the nontemplated colloidal synthesis of single crystal CsPbBr3 perovskite nanosheets with lateral sizes up to a few micrometers and with thickness of just a few unit cells (i.e., below 5 nm), hence in the strong quantum confinement regime, by introducing short ligands (octanoic acid and octylamine) in the synthesis together with longer ones (oleic acid and oleylamine). The lateral size is tunable by varying the ratio of shorter ligands over longer ligands, while the thickness is mainly unaffected by this parameter and stays practically constant at 3 nm in all the syntheses conducted at short-to-long ligands volumetric ratio below 0.67. Beyond this ratio, control over the thickness is lost and a multimodal thickness distribution is observed.
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Affiliation(s)
- Javad Shamsi
- Nanochemistry
Dept., Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Zhiya Dang
- Nanochemistry
Dept., Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Paolo Bianchini
- Nanophysics
Dept., Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Claudio Canale
- Nanophysics
Dept., Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Francesco Di Stasio
- Nanochemistry
Dept., Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Rosaria Brescia
- Nanochemistry
Dept., Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Mirko Prato
- Nanochemistry
Dept., Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry
Dept., Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
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3097
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Dastidar S, Egger DA, Tan LZ, Cromer SB, Dillon AD, Liu S, Kronik L, Rappe AM, Fafarman AT. High Chloride Doping Levels Stabilize the Perovskite Phase of Cesium Lead Iodide. NANO LETTERS 2016; 16:3563-70. [PMID: 27135266 DOI: 10.1021/acs.nanolett.6b00635] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Cesium lead iodide possesses an excellent combination of band gap and absorption coefficient for photovoltaic applications in its perovskite phase. However, this is not its equilibrium structure under ambient conditions. In air, at ambient temperature it rapidly transforms to a nonfunctional, so-called yellow phase. Here we show that chloride doping, particularly at levels near the solubility limit for chloride in a cesium lead iodide host, provides a new approach to stabilizing the functional perovskite phase. In order to achieve high doping levels, we first co-deposit colloidal nanocrystals of pure cesium lead chloride and cesium lead iodide, thereby ensuring nanometer-scale mixing even at compositions that potentially exceed the bulk miscibility of the two phases. The resulting nanocrystal solid is subsequently fused into a polycrystalline thin film by chemically induced, room-temperature sintering. Spectroscopy and X-ray diffraction indicate that the chloride is further dispersed during sintering and a polycrystalline mixed phase is formed. Using density functional theory (DFT) methods in conjunction with nudged elastic band techniques, low-energy pathways for interstitial chlorine diffusion into a majority-iodide lattice were identified, consistent with the facile diffusion and fast halide exchange reactions observed. By comparison to DFT-calculated values (with the PBE exchange-correlation functional), the relative change in band gap and the lattice contraction are shown to be consistent with a Cl/I ratio of a few percent in the mixed phase. At these incorporation levels, the half-life of the functional perovskite phase in a humid atmosphere increases by more than an order of magnitude.
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Affiliation(s)
- Subham Dastidar
- Department of Chemical and Biological Engineering, Drexel University , 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - David A Egger
- Department of Materials and Interfaces, Weizmann Institute of Science , Rehovoth 76100, Israel
| | - Liang Z Tan
- The Makineni Theoretical Laboratories, Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
| | - Samuel B Cromer
- Department of Chemical and Biological Engineering, Drexel University , 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Andrew D Dillon
- Department of Chemical and Biological Engineering, Drexel University , 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Shi Liu
- Geophysical Laboratory, Carnegie Institution for Science , Washington, DC 20015, United States
| | - Leeor Kronik
- Department of Materials and Interfaces, Weizmann Institute of Science , Rehovoth 76100, Israel
| | - Andrew M Rappe
- The Makineni Theoretical Laboratories, Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
| | - Aaron T Fafarman
- Department of Chemical and Biological Engineering, Drexel University , 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
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3098
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Hendon CH, Walsh A, Dincă M. Frontier Orbital Engineering of Metal–Organic Frameworks with Extended Inorganic Connectivity: Porous Alkaline-Earth Oxides. Inorg Chem 2016; 55:7265-9. [DOI: 10.1021/acs.inorgchem.6b00979] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christopher H. Hendon
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Aron Walsh
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K
- Global E3 Institute and Department
of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea
| | - Mircea Dincă
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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3099
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Zhang D, Yang Y, Bekenstein Y, Yu Y, Gibson NA, Wong AB, Eaton SW, Kornienko N, Kong Q, Lai M, Alivisatos AP, Leone SR, Yang P. Synthesis of Composition Tunable and Highly Luminescent Cesium Lead Halide Nanowires through Anion-Exchange Reactions. J Am Chem Soc 2016; 138:7236-9. [DOI: 10.1021/jacs.6b03134] [Citation(s) in RCA: 347] [Impact Index Per Article: 43.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - A. Paul Alivisatos
- Kavli Energy NanoSciences Institute, Berkeley, California 94720, United States
| | | | - Peidong Yang
- Kavli Energy NanoSciences Institute, Berkeley, California 94720, United States
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3100
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Wang D, Wu D, Dong D, Chen W, Hao J, Qin J, Xu B, Wang K, Sun X. Polarized emission from CsPbX3 perovskite quantum dots. NANOSCALE 2016; 8:11565-11570. [PMID: 27211018 DOI: 10.1039/c6nr01915c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Compared to organic/inorganic hybrid perovskites, full inorganic perovskite quantum dots (QDs) exhibit higher stability. In this study, full inorganic CsPbX3 (X = Br, I and mixed halide systems Br/I) perovskite QDs have been synthesized and interestingly, these QDs showed highly polarized photoluminescence which is systematically studied for the first time. Furthermore, the polarization of CsPbI3 was as high as 0.36 in hexane and 0.40 as a film. The CsPbX3 perovskite QDs with high polarization properties indicate that they possess great potential for application in new generation displays with wide colour gamut and low power consumption.
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Affiliation(s)
- Dan Wang
- Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China.
| | - Dan Wu
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Di Dong
- Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China.
| | - Wei Chen
- Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China.
| | - Junjie Hao
- Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China.
| | - Jing Qin
- Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China.
| | - Bing Xu
- Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China.
| | - Kai Wang
- Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China. and Shenzhen Key Laborary of 3rd Generation Semiconductor Devices (SUSTech), Shenzhen, 518055, China
| | - Xiaowei Sun
- Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China. and School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
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