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Wang H, Chen J, Sun Y, Wang F, Yang J, Zhang C, Kong J, Li L. Lead-free Cs 2Ag 1-xNa xIn 1 - yBi yCl 6 perovskite films with broad warm-yellow emission for lighting applications. Sci Rep 2024; 14:14740. [PMID: 38926459 PMCID: PMC11208565 DOI: 10.1038/s41598-024-65492-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 06/20/2024] [Indexed: 06/28/2024] Open
Abstract
Lead-free halide double perovskite Cs2AgInCl6 has been extensively studied in recent years due to the lead toxicity and poor stability of common lead halide perovskites. In this study, sodium (Na+) and bismuth (Bi3+) doped into Cs2AgInCl6 double perovskite, then Cs2Ag1-xNaxIn1 - yBiyCl6 films with broadband warm-yellow emissions were achieved by the blade coating method. Herein, Na and Bi content were changed as variables at a series of parameter optimization experiments, respectively. In the Cs2Ag1-xNaxIn1 - yBiyCl6 systems, Na+ broke the parity-forbidden transition of Cs2AgInCl6, and Bi3+ suppressed non-radiative recombination. The partial replacement of Ag+ with Na+ ions and doping with Bi3+ cations were crucial for increasing the intensity of the PL emission. The experimental results showed that the photoluminescence quantum yield of the Cs2Ag0.4Na0.6In0.8Bi0.2Cl6 film was 66.38%, which was the highest data among all samples. It demonstrated remarkable stability under heat and ultraviolet conditions. After five thermal cycles, the PL intensity of the Cs2Ag0.4Na0.6In0.8Bi0.2Cl6 film is only reduced to approximately 5.7% of the initial value. After 720 h continuous ultraviolet irradiation, there occurred 31.9% emission decay of the film.
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Affiliation(s)
- Haiyan Wang
- College of Sciences, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China
| | - Jin Chen
- College of Sciences, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China.
| | - Yu Sun
- College of Sciences, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China
| | - Fengchao Wang
- College of Sciences, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China.
| | - Jing Yang
- College of Sciences, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China
| | - Canyun Zhang
- College of Sciences, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China
| | - Jinfang Kong
- College of Sciences, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China
| | - Lan Li
- College of Sciences, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China
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2
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Dyksik M, Beret D, Baranowski M, Duim H, Moyano S, Posmyk K, Mlayah A, Adjokatse S, Maude DK, Loi MA, Puech P, Plochocka P. Polaron Vibronic Progression Shapes the Optical Response of 2D Perovskites. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2305182. [PMID: 38072637 PMCID: PMC10870061 DOI: 10.1002/advs.202305182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/23/2023] [Indexed: 02/17/2024]
Abstract
The optical response of 2D layered perovskites is composed of multiple equally-spaced spectral features, often interpreted as phonon replicas, separated by an energy Δ ≃ 12 - 40 meV, depending upon the compound. Here the authors show that the characteristic energy spacing, seen in both absorption and emission, is correlated with a substantial scattering response above ≃ 200 cm-1 (≃ 25 meV) observed in resonant Raman. This peculiar high-frequency signal, which dominates both Stokes and anti-Stokes regions of the scattering spectra, possesses the characteristic spectral fingerprints of polarons. Notably, its spectral position is shifted away from the Rayleigh line, with a tail on the high energy side. The internal structure of the polaron consists of a series of equidistant signals separated by 25-32 cm-1 (3-4 meV), depending upon the compound, forming a polaron vibronic progression. The observed progression is characterized by a large Huang-Rhys factor (S > 6) for all of the 2D layered perovskites investigated here, indicative of a strong charge carrier - lattice coupling. The polaron binding energy spans a range ≃ 20-35 meV, which is corroborated by the temperature-dependent Raman scattering data. The investigation provides a complete understanding of the optical response of 2D layered perovskites via the direct observation of polaron vibronic progression. The understanding of polaronic effects in perovskites is essential, as it directly influences the suitability of these materials for future opto-electronic applications.
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Affiliation(s)
- Mateusz Dyksik
- Department of Experimental PhysicsFaculty of Fundamental Problems of TechnologyWroclaw University of Science and TechnologyWroclaw50370Poland
| | - Dorian Beret
- CEMES‐UPR8011CNRSUniversity of Toulouse29 rue Jeanne MarvigToulouse31500France
| | - Michal Baranowski
- Department of Experimental PhysicsFaculty of Fundamental Problems of TechnologyWroclaw University of Science and TechnologyWroclaw50370Poland
| | - Herman Duim
- Zernike Institute for Advanced MaterialsUniversity of GroningenNijenborgh 4Groningen9747 AGThe Netherlands
| | - Sébastien Moyano
- CEMES‐UPR8011CNRSUniversity of Toulouse29 rue Jeanne MarvigToulouse31500France
| | - Katarzyna Posmyk
- Department of Experimental PhysicsFaculty of Fundamental Problems of TechnologyWroclaw University of Science and TechnologyWroclaw50370Poland
- Laboratoire National des Champs Magnétiques IntensesEMFL, CNRS UPR 3228University Toulouse, University Toulouse 3, INSA‐T, University Grenoble AlpesGrenoble and ToulouseFrance
| | - Adnen Mlayah
- LAASUniversity of ToulouseCNRS, UPS, 7 Avenue du Colonel RocheToulouse31031France
| | - Sampson Adjokatse
- Zernike Institute for Advanced MaterialsUniversity of GroningenNijenborgh 4Groningen9747 AGThe Netherlands
| | - Duncan K. Maude
- Laboratoire National des Champs Magnétiques IntensesEMFL, CNRS UPR 3228University Toulouse, University Toulouse 3, INSA‐T, University Grenoble AlpesGrenoble and ToulouseFrance
| | - Maria Antonietta Loi
- Zernike Institute for Advanced MaterialsUniversity of GroningenNijenborgh 4Groningen9747 AGThe Netherlands
| | - Pascal Puech
- CEMES‐UPR8011CNRSUniversity of Toulouse29 rue Jeanne MarvigToulouse31500France
| | - Paulina Plochocka
- Department of Experimental PhysicsFaculty of Fundamental Problems of TechnologyWroclaw University of Science and TechnologyWroclaw50370Poland
- Laboratoire National des Champs Magnétiques IntensesEMFL, CNRS UPR 3228University Toulouse, University Toulouse 3, INSA‐T, University Grenoble AlpesGrenoble and ToulouseFrance
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3
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Antony LSD, van Dongen S, Grimaldi G, Mathew S, Helmbrecht L, Weijden AVD, Borchert J, Schuringa I, Ehrler B, Noorduin WL, Alarcon-Llado E. The role of Pb oxidation state of the precursor in the formation of 2D perovskite microplates. NANOSCALE 2023; 15:6285-6294. [PMID: 36911989 PMCID: PMC10065060 DOI: 10.1039/d2nr06509f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Two-dimensional (2D) lead halide perovskites are an exciting class of materials currently being extensively explored for photovoltaics and other optoelectronic applications. Their ionic nature makes them ideal candidates for solution processing into both thin films and nanostructured crystals. Understanding how 2D lead halide perovskite crystals form is key towards full control over their physical properties, which may enable new physical phenomena and devices. Here, we investigate the effects of the Pb oxidation state of the initial inorganic precursor on the growth of pure-phase (n = 1) - Popper 2D perovskite BA2PbI4 in single-step synthesis. We examine the different crystallisation routes in exposing PbO2 and PbI2 powders to a BAI : IPA organo-halide solution, by combining in situ optical microscopy, UV-VIS spectroscopy and time-resolved high performance liquid chromatography. So far, works using PbO2 to synthesise 3D LHPs introduce a preceding step to reduce PbO2 into either PbO or PbI2. In this work, we find that BA2PbI4 is directly formed when exposing PbO2 to BAI : IPA without the need for an external reducing agent. We explain this phenomenon by the spontaneous reduction/oxidation of PbO2/BAI that occurs under iodine-rich conditions. We observe differences in the final morphology (rectangles vs. octagons) and nanocrystal growth rate, which we explain through the different chemistry and iodoplumbate complexes involved in each case. As such, this work spans the horizon of usable lead precursors and offers a new turning knob to control crystal growth in single-step LHP synthesis.
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Affiliation(s)
| | | | - Gianluca Grimaldi
- AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
- Optoelectronics Section, Cavendish Laboratory, University of Cambridge, Cambridge, CB2 1TN, UK
| | - Simon Mathew
- Homogeneous, Supramolecular and Bio-Inspired Catalysis, Van't Hoff Institute for Molecular Sciences, University of Amsterdam, 1090 GD Amsterdam, The Netherlands
| | | | | | - Juliane Borchert
- University of Freiburg, Department of Sustainable Systems Engineering - INATECH, 79110 Freiburg im Breisgau, Baden-Württemberg, Germany
- Fraunhofer-Institut für Solare Energiesysteme ISE, Novel Solar Cell Concepts Freiburg, 79110 Freiburg im Breisgau, Baden-Württemberg, Germany
| | - Imme Schuringa
- AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
| | - Bruno Ehrler
- AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
| | - Willem L Noorduin
- AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, 1090 GD Amsterdam, The Netherlands
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4
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Wang Y, He C, Tan Q, Tang Z, Huang L, Liu L, Yin J, Jiang Y, Wang X, Pan A. Exciton-phonon coupling in two-dimensional layered (BA) 2PbI 4 perovskite microplates. RSC Adv 2023; 13:5893-5899. [PMID: 36816078 PMCID: PMC9936372 DOI: 10.1039/d2ra06401d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 01/15/2023] [Indexed: 02/19/2023] Open
Abstract
Two-dimensional layered (BA)2PbI4 (BA = C4H9NH3) perovskites are emerging as a new class of layered materials and show great potential in optoelectronic applications. Elucidating how exciton-phonon interaction affects the excitonic emission is of great importance for a better knowledge of their optoelectronic properties. In this letter, we synthesized high-quality (BA)2PbI4 microplates via solution methods, and dual-excitonic emission peaks (surface-emission and interior-emission) were detected from the as-grown samples at low temperatures. Furthermore, we determine the energies for the longitudinal optical phonon modes to be ∼27 and ∼18 meV, and the exciton-phonon coupling strengths to be ∼177 and ∼21 meV for the surface-emission and interior-emission bands, respectively. Compared to the interior-emission band, the stronger exciton-phonon interaction results in a considerable degree of spectral broadening and red-shift for the surface-emission with increasing temperature. In contrast, the (OA)2PbI4 (OA = C8H17NH2) microplates with longer alkyl chains between Pb-I layers, exhibit only one excitonic emission peak, as well as a large exciton-phonon coupling strength. Our work clarifies the influence of exciton-phonon coupling on the excitonic emission of (BA)2PbI4 microplates, and also suggests the intrinsic relationship between the exciton-phonon coupling and the length of organic carbon chain ligands.
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Affiliation(s)
- Yixiong Wang
- School of Physics and Electronics, Hunan UniversityChangshaHunan 410082China
| | - Chenglin He
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University Changsha Hunan 410082 China
| | - Qin Tan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University Changsha Hunan 410082 China
| | - Zilan Tang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University Changsha Hunan 410082 China
| | - Lanyu Huang
- School of Physics and Electronics, Hunan UniversityChangshaHunan 410082China
| | - Liang Liu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University Changsha Hunan 410082 China
| | - Jiaocheng Yin
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University Changsha Hunan 410082 China
| | - Ying Jiang
- School of Physics and Electronics, Hunan UniversityChangshaHunan 410082China
| | - Xiaoxia Wang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University Changsha Hunan 410082 China
| | - Anlian Pan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University Changsha Hunan 410082 China
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5
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Tabassum N, Georgieva ZN, Debnath GH, Waldeck DH. Size-dependent chiro-optical properties of CsPbBr 3 nanoparticles. NANOSCALE 2023; 15:2143-2151. [PMID: 36633325 DOI: 10.1039/d2nr06751j] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Chiral metal halide perovskites have garnered substantial interest because of their promising properties for application in optoelectronics and spintronics. Understanding the mechanism of chiral imprinting is paramount for optimizing their utility. To elucidate the nature of the underlying chiral imprinting mechanism, we investigated how the circular dichroism (CD) intensity varies with nanoparticle size for quantum confined sizes of colloidal CsPbBr3 perovskite nanoparticles (NPs) capped by chiral β-methylphenethylammonium bromide ligands. We find that the CD intensity decreases strongly with increasing NP size, which, along with the shape of the CD spectra, points to electronic interactions between ligand and NP as the dominant mechanism of chiral imprinting in smaller NPs. We observe that as the NP size increases and crosses the quantum confinement threshold, the dominant mechanism of chirality transfer switches and is dominated by surfaces effects, e.g., structural distortions. These findings provide a benchmark for quantitative models of chiral imprinting.
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Affiliation(s)
- Nazifa Tabassum
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
| | - Zheni N Georgieva
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
| | - Gouranga H Debnath
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
- Centre for Nano and Material Science (CNMS), Jain University, Bangalore, Karnataka 562112, India
| | - David H Waldeck
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
- Petersen Institute of NanoScience and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
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6
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Jia Q, Wang C, Liu J, Cai X, Zhong L, Chen S, Li T, Yu G, Wu LZ, Duan D. Synergistic Effect of Sr-O Divacancy and Exposing Facets in SrTiO 3 Micro/Nano Particle: Accelerating Exciton Formation and Splitting, Highly Efficient Co 2+ Photooxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2202659. [PMID: 36059245 DOI: 10.1002/smll.202202659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 07/17/2022] [Indexed: 06/15/2023]
Abstract
As a typical perovskite-type crystal, polyhedral strontium titanate (SrTiO3 ) has shown anisotropic charge transport behavior in recent studies, however, the carrier transportation and transition of which has not been explained very clearly. This work present the existence of Sr and O divacancies in the novel rhombicuboctahedron SrTiO3 micro/nano particles (Sr1- x TiO3- x /TiO2- x ) with exposing (100), (110) and (111) facets and the diameter of 300-700 nm synthesized via hydrothermal synthesis, and also summarizes the dissociation mechanism of self-trapped excitons (STEs) caused by the divacancy and facet effect. In addition, most importantly, the metastable STEs with ultra-low binding energy (Eb < 3 meV) under illumination are discovered. Combining the model of S-scheme heterojunction, a conversion mechanism of photoinduced carriers is proposed. The photocatalytic reaction of Co2+ is used as the probe reaction, and the unique Sr1- x TiO3- x /TiO2- x possesses a high photooxidation efficiency of Co2+ , by which 70.3% of Co2+ is oxidized to Co3+ (CoOOH) in 5 min. This finding may provide a guideline for an optimal design of the photocatalytic materials for the recovery and extraction of metal ions based on SrTiO3 .
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Affiliation(s)
- Qibo Jia
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Chuyu Wang
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jian Liu
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiaojiao Cai
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Li Zhong
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Siming Chen
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Ting Li
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Gangqiang Yu
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Li-Zhu Wu
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Dongping Duan
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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7
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DeCrescent RA, Kennard RM, Chabinyc ML, Schuller JA. Optical-Frequency Magnetic Polarizability in a Layered Semiconductor. PHYSICAL REVIEW LETTERS 2021; 127:173604. [PMID: 34739261 DOI: 10.1103/physrevlett.127.173604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
The optical response of crystals is most commonly attributed to electric dipole interactions between light and matter. Although metamaterials support "artificial" magnetic resonances supported by mesoscale structuring, there are no naturally occurring materials known to exhibit a nonzero optical-frequency magnetic polarizability. Here, we experimentally demonstrate and quantify a naturally occurring nonzero magnetic polarizability in a layered semiconductor system: two-dimensional (Ruddlesden-Popper phase) hybrid organic-inorganic perovskites. These results demonstrate the only known material with an optical-frequency permeability that differs appreciably from vacuum, informing future efforts to find, synthesize, or exploit atomic-scale optical magnetism for novel optical phenomena such as negative index of refraction and electromagnetic cloaking.
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Affiliation(s)
- Ryan A DeCrescent
- Department of Physics, University of California Santa Barbara, Santa Barbara, California 93106, USA
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA
| | - Rhys M Kennard
- Materials Department, University of California Santa Barbara, Santa Barbara, California 93106, USA
| | - Michael L Chabinyc
- Materials Department, University of California Santa Barbara, Santa Barbara, California 93106, USA
| | - Jon A Schuller
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA
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8
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Anantharaman SB, Jo K, Jariwala D. Exciton-Photonics: From Fundamental Science to Applications. ACS NANO 2021; 15:12628-12654. [PMID: 34310122 DOI: 10.1021/acsnano.1c02204] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Semiconductors in all dimensionalities ranging from 0D quantum dots and molecules to 3D bulk crystals support bound electron-hole pair quasiparticles termed excitons. Over the past two decades, the emergence of a variety of low-dimensional semiconductors that support excitons combined with advances in nano-optics and photonics has burgeoned an advanced area of research that focuses on engineering, imaging, and modulating the coupling between excitons and photons, resulting in the formation of hybrid quasiparticles termed exciton-polaritons. This advanced area has the potential to bring about a paradigm shift in quantum optics, as well as classical optoelectronic devices. Here, we present a review on the coupling of light in excitonic semiconductors and previous investigations of the optical properties of these hybrid quasiparticles via both far-field and near-field imaging and spectroscopy techniques. Special emphasis is given to recent advances with critical evaluation of the bottlenecks that plague various materials toward practical device implementations including quantum light sources. Our review highlights a growing need for excitonic material development together with optical engineering and imaging techniques to harness the utility of excitons and their host materials for a variety of applications.
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Affiliation(s)
- Surendra B Anantharaman
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Kiyoung Jo
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Deep Jariwala
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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9
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Dutta T, Sheikh T, Nag A. Temperature-Dependent Photoluminescence of Hexafluorobenzene-Intercalated Phenethylammonium Tin Iodide 2D Perovskite. Chem Asian J 2021; 16:2745-2751. [PMID: 34342155 DOI: 10.1002/asia.202100755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 07/30/2021] [Indexed: 11/07/2022]
Abstract
Tin halide perovskites are potential alternatives of lead halide perovskites. However, the easy oxidation of Sn2+ to Sn4+ brings in a challenge. Recently, layered two-dimensional hybrid tin halide perovskites have been shown to partially resist the oxidation process because of the presence of hydrophobic organic molecules. Consequently, such layered hybrid perovskites are being explored for optoelectronic applications. The optical properties of layered tin halide perovskites depend on the interlayer separation and the dielectric mismatch between the organic and inorganic layers. Intercalation (insertion) of a molecular species between the layers modifies the interlayer interactions affecting the optical properties of layered hybrid perovskites. We investigated the effect of hexafluorobenzene (HFB) intercalation in phenethylammonium tin iodide [(PEA)2 SnI4 ] using temperature-dependent (6 K to 300 K) photoluminescence (PL). HFB intercalation increases the bandgap. A strong PL quenching is observed in pristine (PEA)2 SnI4 below 150 K, probably because of the presence of non-emissive states. HFB intercalation suppresses the influence of such non-emissive states resulting in an increase in PL intensity at the cryogenic temperatures. Our results highlight that a simple molecular intercalation (non-covalent interaction) into layered hybrid perovskites can significantly tailor the electronic and optical properties.
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Affiliation(s)
- Taniya Dutta
- Department of Chemistry, Indian Institute of Science Education and Research (IISER, Pune, 411008, India
| | - Tariq Sheikh
- Department of Chemistry, Indian Institute of Science Education and Research (IISER, Pune, 411008, India
| | - Angshuman Nag
- Department of Chemistry, Indian Institute of Science Education and Research (IISER, Pune, 411008, India
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10
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Chirvony VS, Suárez I, Rodríguez-Romero J, Vázquez-Cárdenas R, Sanchez-Diaz J, Molina-Sánchez A, Barea EM, Mora-Seró I, Martínez-Pastor JP. Inhomogeneous Broadening of Photoluminescence Spectra and Kinetics of Nanometer-Thick (Phenethylammonium) 2PbI 4 Perovskite Thin Films: Implications for Optoelectronics. ACS APPLIED NANO MATERIALS 2021; 4:6170-6177. [PMID: 35698624 PMCID: PMC9185684 DOI: 10.1021/acsanm.1c00984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 06/03/2021] [Indexed: 06/14/2023]
Abstract
An outstanding potentiality of layered two-dimensional (2D) organic-inorganic hybrid perovskites (2DHPs) is in the development of solar cells, photodetectors, and light-emitting diodes. In 2DHPs, an exciton is localized in an atomically thin lead(II) halide inorganic layer of sub-nanometer thickness as in a quantum well sandwiched between organic layers as energetic and dielectric barriers. In previous years, versatile optical characterization of 2DHPs has been carried out mainly for thin flakes of single crystals and ultrathin (of the order of 20 nm) polycrystalline films, whereas there is a lack of optical characterization of thick (hundreds of nanometers) polycrystalline films, fundamentals for fabrication of devices. Here, with the use of photoluminescence (PL) and absorption spectroscopies, we studied the exciton behavior in ∼200 nm polycrystalline thin films of 2D perovskite (PEA)2PbI4, where PEA is phenethylammonium. Contrary to the case of ultrathin films, we have found that peak energies and line width of the excitonic bands in our films demonstrate unusual extremely weak sensitivity to temperature in 20-300 K diapason. The excitonic PL band is characterized by a significant (∼30 meV) Stokes shift with respect to the corresponding absorption band as well as by a full absence of the exciton fine structure at cryogenic temperatures. We suggest that the observed effects are due to the large inhomogeneous broadening of the excitonic PL and absorption bands resulting from the (PEA)2PbI4 band gap energy dependence on the number of lead(II) halide layers of individual crystallites. The characteristic time of the exciton energy funneling from higher- to lower-energy crystallites within (PEA)2PbI4 polycrystalline thin films is about 100 ps.
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Affiliation(s)
- Vladimir S. Chirvony
- UMDO,
Instituto de Ciencia de los Materiales, Universidad de Valencia, Paterna, Valencia 46980, Spain
| | - Isaac Suárez
- Escuela
Técnica Superior de Ingeniería, Universidad de Valencia, Burjassot, Valencia 46100, Spain
| | - Jesús Rodríguez-Romero
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Castelló
de la Plana, Castelló 12006, Spain
- Facultad
de Química, Universidad Nacional
Autónoma de México, Coyoacán, Ciudad de México 04510, Mexico
| | - Rubén Vázquez-Cárdenas
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Castelló
de la Plana, Castelló 12006, Spain
- Facultad
de Ciencias Químicas, Universidad
de Colima, Colima 28400, Mexico
| | - Jesus Sanchez-Diaz
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Castelló
de la Plana, Castelló 12006, Spain
| | - Alejandro Molina-Sánchez
- UMDO,
Instituto de Ciencia de los Materiales, Universidad de Valencia, Paterna, Valencia 46980, Spain
| | - Eva M. Barea
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Castelló
de la Plana, Castelló 12006, Spain
| | - Iván Mora-Seró
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Castelló
de la Plana, Castelló 12006, Spain
| | - Juan P. Martínez-Pastor
- UMDO,
Instituto de Ciencia de los Materiales, Universidad de Valencia, Paterna, Valencia 46980, Spain
| |
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