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Tyagi D, Laxmi V, Basu N, Reddy L, Tian Y, Ouyang Z, Nayak PK. Recent advances in two-dimensional perovskite materials for light-emitting diodes. DISCOVER NANO 2024; 19:109. [PMID: 38954158 PMCID: PMC11219672 DOI: 10.1186/s11671-024-04044-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 06/10/2024] [Indexed: 07/04/2024]
Abstract
Light-emitting diodes (LEDs) are an indispensable part of our daily life. After being studied for a few decades, this field still has some room for improvement. In this regard, perovskite materials may take the leading role. In recent years, LEDs have become a most explored topic, owing to their various applications in photodetectors, solar cells, lasers, and so on. Noticeably, they exhibit significant characteristics in developing LEDs. The luminous efficiency of LEDs can be significantly enhanced by the combination of a poor illumination LED with low-dimensional perovskite. In 2014, the first perovskite-based LED was illuminated at room temperature. Furthermore, two-dimensional (2D) perovskites have enriched this field because of their optical and electronic properties and comparatively high stability in ambient conditions. Recent and relevant advancements in LEDs using low-dimensional perovskites including zero-dimensional to three-dimensional materials is reported. The major focus of this article is based on the 2D perovskites and their heterostructures (i.e., a combination of 2D perovskites with transition metal dichalcogenides, graphene, and hexagonal boron nitride). In comparison to 2D perovskites, heterostructures exhibit more potential for application in LEDs. State-of-the-art perovskite-based LEDs, current challenges, and prospects are also discussed.
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Affiliation(s)
- Deepika Tyagi
- Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education and Guangdong Province, College of Electronic Science and Technology of Shenzhen University, THz Technical Research Center of Shenzhen University, Shenzhen University, Shenzhen, 518060, China
| | - Vijay Laxmi
- Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education and Guangdong Province, College of Electronic Science and Technology of Shenzhen University, THz Technical Research Center of Shenzhen University, Shenzhen University, Shenzhen, 518060, China
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
- College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Nilanjan Basu
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Leelakrishna Reddy
- Department of Physics, University of Johannesburg, Johannesburg, 2006, South Africa
| | - Yibin Tian
- College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Zhengbiao Ouyang
- Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education and Guangdong Province, College of Electronic Science and Technology of Shenzhen University, THz Technical Research Center of Shenzhen University, Shenzhen University, Shenzhen, 518060, China.
| | - Pramoda K Nayak
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India.
- 2D Materials Research and Innovation Group, Indian Institute of Technology Madras, Chennai, 600036, India.
- Centre for Nano and Material Sciences, Jain (Deemed-to-be University), Jain Global Campus, Kanakapura, , Bangalore, Karnataka, 562112, India.
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2
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Moritaka SS, Lebedev VS. Orientational effects in the polarized absorption spectra of molecular aggregates. J Chem Phys 2024; 160:074901. [PMID: 38364011 DOI: 10.1063/5.0188128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Accepted: 01/23/2024] [Indexed: 02/18/2024] Open
Abstract
We present a detailed theoretical analysis of polarized absorption spectra and linear dichroism of cyanine dye aggregates whose unit cells contain two molecules. The studied threadlike ordered system with a molecular exciton delocalized along its axis can be treated as two chains of conventional molecular aggregates, rotated relative to each other at a certain angle around the aggregate axis. Our approach is based on the general formulas for the effective cross section of light absorption by a molecular aggregate and key points of the molecular exciton theory. We have developed a self-consistent theory for describing the orientational effects in the absorption and dichroic spectra of such supramolecular structures with nonplanar unit cell. It is shown that the spectral behavior of such systems exhibits considerable distinctions from that of conventional cyanine dye aggregates. They consist in the strong dependence of the relative intensities of the J- and H-type spectral bands of the aggregate with a nonplanar unit cell on the angles determining the mutual orientations of the transition dipole moments of constituting molecules and the aggregate axis as well as on the polarization direction of incident light. The derived formulas are reduced to the well-known analytical expressions in the particular case of aggregates with one molecule in the unit cell. The calculations performed within the framework of our excitonic theory combined with available vibronic theory allow us to quite reasonably explain the experimental data for the pseudoisocyanine bromide dye aggregate.
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Affiliation(s)
- S S Moritaka
- P. N. Lebedev Physical Institute of Russian Academy of Sciences, 53 Leninskiy Prosp., 119991 Moscow, Russian Federation
| | - V S Lebedev
- P. N. Lebedev Physical Institute of Russian Academy of Sciences, 53 Leninskiy Prosp., 119991 Moscow, Russian Federation
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Baruj HD, Bozkaya I, Canimkurbey B, Isik AT, Shabani F, Delikanli S, Shendre S, Erdem O, Isik F, Demir HV. Highly-Directional, Highly-Efficient Solution-Processed Light-Emitting Diodes of All-Face-Down Oriented Colloidal Quantum Well Self-Assembly. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2206582. [PMID: 37021726 DOI: 10.1002/smll.202206582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 03/06/2023] [Indexed: 06/19/2023]
Abstract
Semiconductor colloidal quantum wells (CQWs) provide anisotropic emission behavior originating from their anisotropic optical transition dipole moments (TDMs). Here, solution-processed colloidal quantum well light-emitting diodes (CQW-LEDs) of a single all-face-down oriented self-assembled monolayer (SAM) film of CQWs that collectively enable a supreme level of IP TDMs at 92% in the ensemble emission are shown. This significantly enhances the outcoupling efficiency from 22% (of standard randomly-oriented emitters) to 34% (of face-down oriented emitters) in the LED. As a result, the external quantum efficiency reaches a record high level of 18.1% for the solution-processed type of CQW-LEDs, putting their efficiency performance on par with the hybrid organic-inorganic evaporation-based CQW-LEDs and all other best solution-processed LEDs. This SAM-CQW-LED architecture allows for a high maximum brightness of 19,800 cd m-2 with a long operational lifetime of 247 h at 100 cd m-2 as well as a stable saturated deep-red emission (651 nm) with a low turn-on voltage of 1.7 eV at a current density of 1 mA cm-2 and a high J90 of 99.58 mA cm-2 . These findings indicate the effectiveness of oriented self-assembly of CQWs as an electrically-driven emissive layer in improving outcoupling and external quantum efficiencies in the CQW-LEDs.
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Affiliation(s)
- Hamed Dehghanpour Baruj
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
| | - Iklim Bozkaya
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
| | - Betul Canimkurbey
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
- Central Research Laboratory, Amasya University, Amasya, 05100, Turkey
| | - Ahmet Tarik Isik
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
| | - Farzan Shabani
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
| | - Savas Delikanli
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
- LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Sushant Shendre
- LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Onur Erdem
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
| | - Furkan Isik
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
| | - Hilmi Volkan Demir
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey
- LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 639798, Singapore
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Jakovljević MM, Aškrabić S, Isić G, Vasić B, Gajić R, Artemyev M. Pseudo-refractive index and excitonic features of single layer CdSe/CdS core-shell nanoplatelet films. NANOTECHNOLOGY 2020; 31:435708. [PMID: 32634786 DOI: 10.1088/1361-6528/aba39f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Semiconductor CdSe/CdS core-shell nanoplatelets exhibit narrow and intense absorption and photoluminescence spectra in the visible range, which makes them suitable for numerous applications in optoelectronics. Of particular interest is the preparation and optical characterization of thin films with an accurately controlled amount of nanoplatelets. Here we report on the use of spectroscopic ellipsometry for investigating the optical properties of ultrathin films composed of a single layer of negatively charged CdSe/CdS core-shell nanoplatelets prepared by the electrostatic layer-by-layer deposition on SiO2/Si substrates. Combining the ellipsometric spectra with atomic force microscopy measurements, we were able to infer the nanoplatelet film extinction spectra which was found to exhibit the two characteristic exciton peaks albeit blueshifted relative to the colloidal nanoplatelets.
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Affiliation(s)
- Milka M Jakovljević
- Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia
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Qu J, Rastogi P, Gréboval C, Livache C, Dufour M, Chu A, Chee SS, Ramade J, Xu XZ, Ithurria S, Lhuillier E. Nanoplatelet-Based Light-Emitting Diode and Its Use in All-Nanocrystal LiFi-like Communication. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22058-22065. [PMID: 32292032 DOI: 10.1021/acsami.0c05264] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Now that colloidal nanocrystals (NCs) have been integrated as green and red sources for liquid crystal displays, the next challenge for quantum dots is their use in electrically driven light-emitting diodes (LEDs). Among various colloidal NCs, nanoplatelets (NPLs) have appeared as promising candidates for light-emitting devices because their two-dimensional shape allows a narrow luminescence spectrum, directional emission, and high light extraction. To reach high quantum efficiency, it is critical to grow core/shell structures. High temperature growth of the shells seems to be a better strategy than previously reported low-temperature approaches to obtain bright NPLs. Here, we synthesize CdSe/CdZnS core/shell NPLs whose shell alloy content is tuned to optimize the charge injection in the LED structure. The obtained LED has exceptionally low turn-on voltage, long-term stability (>3100 h at 100 cd m-2), external quantum efficiency above 5%, and luminance up to 35,000 cd m-2. We study the low-temperature performance of the LED and find that there is a delay of droop in terms of current density as temperature decreases. In the last part of the paper, we design a large LED (56 mm2 emitting area) and test its potential for LiFi-like communication. In such an approach, the LED is not only a lightning source but also used to transmit a communication signal to a PbS quantum dot solar cell used as a broadband photodetector. Operating conditions compatible with both lighting and information transfer have been identified. This work paves the way toward an all NC-based communication setup.
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Affiliation(s)
- Junling Qu
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
| | - Prachi Rastogi
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
| | - Charlie Gréboval
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
| | - Clément Livache
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin 75005 Paris, France
| | - Marion Dufour
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin 75005 Paris, France
| | - Audrey Chu
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
| | - Sang-Soo Chee
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
| | - Julien Ramade
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
| | - Xiang Zhen Xu
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin 75005 Paris, France
| | - Sandrine Ithurria
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin 75005 Paris, France
| | - Emmanuel Lhuillier
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
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6
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Li Q, Yang Y, Que W, Lian T. Size- and Morphology-Dependent Auger Recombination in CsPbBr 3 Perovskite Two-Dimensional Nanoplatelets and One-Dimensional Nanorods. NANO LETTERS 2019; 19:5620-5627. [PMID: 31244208 DOI: 10.1021/acs.nanolett.9b02145] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs), including zero-dimensional (0D) quantum dots (QDs), one-dimensional (1D) nanorods (NRs), and two-dimensional (2D) nanoplatelets (NPLs), have shown promising performances in light-emitting diode (LED) and lasing applications. However, Auger recombination, one of the key processes that limit their performance, remains poorly understood in CsPbX3 2D NPLs and 1D NRs. We show that the biexciton Auger lifetimes of CsPbBr3 NPLs (NRs) scale linearly with the NPL lateral area (NR length) and deviates from the "universal volume scale law" that has been observed for QDs. These results are consistent with a model in which the Auger recombination rate for 1D NRs and 2D NPLs is a product of binary collision frequency in the nonquantum confined dimension and Auger probability per collision. Comparisons of Auger recombination in CsPbBr3 NCs of different dimensionalities and similar band gaps suggest that Auger probability increases in NCs with a higher number of confined dimensions. Compared to CdSe and PbSe NCs with the same dimensionalities and similar sizes, Auger recombination rates in 0D-2D CsPbBr3 NCs are over 10-fold faster. Fast Auger recombination in CsPbBr3 NCs shows their potentials for Auger-assisted up-conversion and single photon source, while suppressing Auger recombination may further enhance their performances in LED and lasing applications.
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Affiliation(s)
- Qiuyang Li
- Department of Chemistry , Emory University , 1515 Dickey Drive, NE , Atlanta , Georgia 30322 , United States
| | - Yawei Yang
- Department of Chemistry , Emory University , 1515 Dickey Drive, NE , Atlanta , Georgia 30322 , United States
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, and Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi People's Republic of China
| | - Wenxiu Que
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, and Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi People's Republic of China
| | - Tianquan Lian
- Department of Chemistry , Emory University , 1515 Dickey Drive, NE , Atlanta , Georgia 30322 , United States
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7
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Bai X, Purcell-Milton F, Gun'ko YK. Optical Properties, Synthesis, and Potential Applications of Cu-Based Ternary or Quaternary Anisotropic Quantum Dots, Polytypic Nanocrystals, and Core/Shell Heterostructures. NANOMATERIALS 2019; 9:nano9010085. [PMID: 30634642 PMCID: PMC6359286 DOI: 10.3390/nano9010085] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 12/28/2018] [Accepted: 12/31/2018] [Indexed: 12/29/2022]
Abstract
This review summaries the optical properties, recent progress in synthesis, and a range of applications of luminescent Cu-based ternary or quaternary quantum dots (QDs). We first present the unique optical properties of the Cu-based multicomponent QDs, regarding their emission mechanism, high photoluminescent quantum yields (PLQYs), size-dependent bandgap, composition-dependent bandgap, broad emission range, large Stokes’ shift, and long photoluminescent (PL) lifetimes. Huge progress has taken place in this area over the past years, via detailed experimenting and modelling, giving a much more complete understanding of these nanomaterials and enabling the means to control and therefore take full advantage of their important properties. We then fully explore the techniques to prepare the various types of Cu-based ternary or quaternary QDs (including anisotropic nanocrystals (NCs), polytypic NCs, and spherical, nanorod and tetrapod core/shell heterostructures) are introduced in subsequent sections. To date, various strategies have been employed to understand and control the QDs distinct and new morphologies, with the recent development of Cu-based nanorod and tetrapod structure synthesis highlighted. Next, we summarize a series of applications of these luminescent Cu-based anisotropic and core/shell heterostructures, covering luminescent solar concentrators (LSCs), bioimaging and light emitting diodes (LEDs). Finally, we provide perspectives on the overall current status, challenges, and future directions in this field. The confluence of advances in the synthesis, properties, and applications of these Cu-based QDs presents an important opportunity to a wide-range of fields and this piece gives the reader the knowledge to grasp these exciting developments.
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Affiliation(s)
- Xue Bai
- School of Chemistry and CRANN Institute, Trinity College Dublin, Dublin 2, Dublin, Ireland.
| | - Finn Purcell-Milton
- School of Chemistry and CRANN Institute, Trinity College Dublin, Dublin 2, Dublin, Ireland.
| | - Yuri K Gun'ko
- School of Chemistry and CRANN Institute, Trinity College Dublin, Dublin 2, Dublin, Ireland.
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8
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Shapiro BI, Nekrasov AD, Krivobok VS, Lebedev VS. Optical properties of molecular nanocrystals consisting of J-aggregates of anionic and cationic cyanine dyes. OPTICS EXPRESS 2018; 26:30324-30337. [PMID: 30469907 DOI: 10.1364/oe.26.030324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 10/06/2018] [Indexed: 06/09/2023]
Abstract
We report results of experimental studies of the photoabsorption, photoluminescent and photoelectric properties of a new type of multilayer molecular nanocrystals, consisting of highly ordered J-aggregates of one anionic and two cationic J-aggregates of cyanine dyes. In contrast to conventional J-aggregated dyes the multichromic nanocrystals synthesized in this work, are capable of efficient light absorption in three excitonic bands of the visible and near-IR spectral ranges. The spectral peak positions in the absorption bands can be controlled by appropriately selecting a set of dyes a molecular crystal is made of. Our investigations of the photoelectric properties of multichromic crystals have shown that each of them can potentially be used as a photosensitive layer of a photocell with photoconductivity in three peaks of excitonic absorption. The synthesized nanocrystals are attractive for the creation of thin-film organic photodetectors with a large photosensitive area and varied photoabsorption spectra, excitonic waveguides and for some other applications in organic and hybrid photonics and optoelectronics.
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Pandya R, Chen RYS, Cheminal A, Dufour M, Richter JM, Thomas TH, Ahmed S, Sadhanala A, Booker EP, Divitini G, Deschler F, Greenham NC, Ithurria S, Rao A. Exciton–Phonon Interactions Govern Charge-Transfer-State Dynamics in CdSe/CdTe Two-Dimensional Colloidal Heterostructures. J Am Chem Soc 2018; 140:14097-14111. [DOI: 10.1021/jacs.8b05842] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Raj Pandya
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Richard Y. S. Chen
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Alexandre Cheminal
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Marion Dufour
- LPEM, ESPCI Paris, PSL Research University, CNRS, 10 Rue Vauquelin, 75005 Paris, France
| | - Johannes M. Richter
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Tudor H. Thomas
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Shahab Ahmed
- Institute for Manufacturing, Department of Engineering, University of Cambridge, 17 Charles Babbage Road, CB3 0FS, Cambridge, United Kingdom
| | - Aditya Sadhanala
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Edward P. Booker
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Giorgio Divitini
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, CB3 0FS, Cambridge, United Kingdom
| | - Felix Deschler
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Neil C. Greenham
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
| | - Sandrine Ithurria
- LPEM, ESPCI Paris, PSL Research University, CNRS, 10 Rue Vauquelin, 75005 Paris, France
| | - Akshay Rao
- Cavendish Laboratory, University of Cambridge, J.J. Thompson Avenue, CB3 0HE, Cambridge, United Kingdom
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Taghipour N, Hernandez Martinez PL, Ozden A, Olutas M, Dede D, Gungor K, Erdem O, Perkgoz NK, Demir HV. Near-Unity Efficiency Energy Transfer from Colloidal Semiconductor Quantum Wells of CdSe/CdS Nanoplatelets to a Monolayer of MoS 2. ACS NANO 2018; 12:8547-8554. [PMID: 29965729 DOI: 10.1021/acsnano.8b04119] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A hybrid structure of the quasi-2D colloidal semiconductor quantum wells assembled with a single layer of 2D transition metal dichalcogenides offers the possibility of highly strong dipole-to-dipole coupling, which may enable extraordinary levels of efficiency in Förster resonance energy transfer (FRET). Here, we show ultrahigh-efficiency FRET from the ensemble thin films of CdSe/CdS nanoplatelets (NPLs) to a MoS2 monolayer. From time-resolved fluorescence spectroscopy, we observed the suppression of the photoluminescence of the NPLs corresponding to the total rate of energy transfer from ∼0.4 to 268 ns-1. Using an Al2O3 separating layer between CdSe/CdS and MoS2 with thickness tuned from 5 to 1 nm, we found that FRET takes place 7- to 88-fold faster than the Auger recombination in CdSe-based NPLs. Our measurements reveal that the FRET rate scales down with d-2 for the donor of CdSe/CdS NPLs and the acceptor of the MoS2 monolayer, d being the center-to-center distance between this FRET pair. A full electromagnetic model explains the behavior of this d-2 system. This scaling arises from the delocalization of the dipole fields in the ensemble thin film of the NPLs and full distribution of the electric field across the layer of MoS2. This d-2 dependency results in an extraordinarily long Förster radius of ∼33 nm.
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Affiliation(s)
- Nima Taghipour
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
| | - Pedro Ludwig Hernandez Martinez
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
- Luminous! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Materials Sciences, School of Materials Science and Nanotechnology , Nanyang Technological University , Singapore 639798 , Singapore
| | - Ayberk Ozden
- Department of Materials Science and Engineering, Faculty of Engineering , Anadolu University , 26555 Eskisehir , Turkey
| | - Murat Olutas
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
- Department of Physics , Abant Izzet Baysal University , Bolu 14030 , Turkey
| | - Didem Dede
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
| | - Kivanc Gungor
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
| | - Onur Erdem
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
| | - Nihan Kosku Perkgoz
- Department of Electrical and Electronics Engineering, Faculty of Engineering , Anadolu University , 26555 Eskisehir , Turkey
| | - Hilmi Volkan Demir
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
- Luminous! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Materials Sciences, School of Materials Science and Nanotechnology , Nanyang Technological University , Singapore 639798 , Singapore
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Xiao P, Huang J, Yan D, Luo D, Yuan J, Liu B, Liang D. Emergence of Nanoplatelet Light-Emitting Diodes. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1376. [PMID: 30096754 PMCID: PMC6119858 DOI: 10.3390/ma11081376] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 07/19/2018] [Accepted: 07/27/2018] [Indexed: 12/20/2022]
Abstract
Since 2014, nanoplatelet light-emitting diodes (NPL-LEDs) have been emerged as a new kind of LEDs. At first, NPL-LEDs are mainly realized by CdSe based NPLs. Since 2016, hybrid organic-inorganic perovskite NPLs are found to be effective to develop NPL-LEDs. In 2017, all-inorganic perovskite NPLs are also demonstrated for NPL-LEDs. Therefore, the development of NPL-LEDs is flourishing. In this review, the fundamental concepts of NPL-LEDs are first introduced, then the main approaches to realize NPL-LEDs are summarized and the recent progress of representative NPL-LEDs is highlighted, finally the challenges and opportunities for NPL-LEDs are presented.
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Affiliation(s)
- Peng Xiao
- School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528000, China.
| | - Junhua Huang
- School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528000, China.
| | - Dong Yan
- School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528000, China.
| | - Dongxiang Luo
- School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
| | - Jian Yuan
- School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528000, China.
| | - Baiquan Liu
- LUMINOUS, Center of Excellent for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore.
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
| | - Dong Liang
- LUMINOUS, Center of Excellent for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore.
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Giovanella U, Pasini M, Lorenzon M, Galeotti F, Lucchi C, Meinardi F, Luzzati S, Dubertret B, Brovelli S. Efficient Solution-Processed Nanoplatelet-Based Light-Emitting Diodes with High Operational Stability in Air. NANO LETTERS 2018; 18:3441-3448. [PMID: 29722262 DOI: 10.1021/acs.nanolett.8b00456] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Colloidal nanoplatelets (NPLs), owing to their efficient and narrow-band luminescence, are considered as promising candidates for solution-processable light-emitting diodes (LEDs) with ultrahigh color purity. To date, however, the record efficiencies of NPL-LEDs are significantly lower than those of more-investigated devices based on spherical nanocrystals. This is particularly true for red-emitting NPL-LEDs, the best-reported external quantum efficiency (EQE) of which is limited to 0.63% (EQE = 5% for green NPL-LEDs). Here, we address this issue by introducing a charge-regulating layer of a polar and polyelectrolytic polymer specifically engineered with complementary trimethylammonium and phosphonate functionalities that provide high solubility in orthogonal polar media with respect to the NPL active layer, compatibility with the metal cathode, and the ability to control electron injection through the formation of a polarized interface under bias. Through this synergic approach, we achieve EQE = 5.73% at 658 nm (color saturation 98%) in completely solution processed LEDs. Remarkably, exposure to air increases the EQE to 8.39%, exceeding the best reports of red NPL-LEDs by over 1 order of magnitude and setting a new global record for quantum-dot LEDs of any color embedding solution-deposited organic interlayers. Considering the emission quantum yield of the NPLs (40 ± 5%), this value corresponds to a near-unity internal quantum efficiency. Notably, our devices show exceptional operational stability for over 5 h of continuous drive in air with no encapsulation, thus confirming the potential of NPLs for efficient, high-stability, saturated LEDs.
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Affiliation(s)
- Umberto Giovanella
- Istituto per lo Studio delle Macromolecole , Consiglio Nazionale delle Ricerche (ISMac-CNR) , Via Bassini 15 , 20133 Milano , Italy
| | - Mariacecilia Pasini
- Istituto per lo Studio delle Macromolecole , Consiglio Nazionale delle Ricerche (ISMac-CNR) , Via Bassini 15 , 20133 Milano , Italy
| | - Monica Lorenzon
- Dipartimento di Scienza dei Materiali , Università degli Studi di Milano-Bicocca , via Cozzi 55 , I-20125 Milano , Italy
| | - Francesco Galeotti
- Istituto per lo Studio delle Macromolecole , Consiglio Nazionale delle Ricerche (ISMac-CNR) , Via Bassini 15 , 20133 Milano , Italy
| | - Claudio Lucchi
- Dipartimento di Scienza dei Materiali , Università degli Studi di Milano-Bicocca , via Cozzi 55 , I-20125 Milano , Italy
| | - Francesco Meinardi
- Dipartimento di Scienza dei Materiali , Università degli Studi di Milano-Bicocca , via Cozzi 55 , I-20125 Milano , Italy
| | - Silvia Luzzati
- Istituto per lo Studio delle Macromolecole , Consiglio Nazionale delle Ricerche (ISMac-CNR) , Via Bassini 15 , 20133 Milano , Italy
| | - Benoit Dubertret
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-ParisTech , PSL Research University, Sorbonne Université UPMC Université Paris 06, CNRS , 10 rue Vauquelin , 75005 Paris , France
| | - Sergio Brovelli
- Dipartimento di Scienza dei Materiali , Università degli Studi di Milano-Bicocca , via Cozzi 55 , I-20125 Milano , Italy
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Lazareva EP, Kozlovskii VF, Vasiliev RB, Gaskov AM. Tin Domain Growth on Quasi-Two-Dimensional CdTe and CdSe Nanoparticles. RUSS J INORG CHEM+ 2018. [DOI: 10.1134/s0036023618050133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Kormilina TK, Cherevkov SA, Fedorov AV, Baranov AV. Cadmium Chalcogenide Nano-Heteroplatelets: Creating Advanced Nanostructured Materials by Shell Growth, Substitution, and Attachment. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1702300. [PMID: 28895307 DOI: 10.1002/smll.201702300] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 07/24/2017] [Indexed: 06/07/2023]
Abstract
The current direction in the evolution of 2D semiconductor nanocrystals involves the combination of metal and semiconductor components to form new nanoengineered materials called nano-heteroplatelets. This Review covers different heterostructure architectures that can be applied to cadmium chalcogenide nanoplatelets, including variously shaped shell, metal nanoparticle decoration, and doped and alloy systems. Here, for the first time a complete classification of nano-heteroplatelet types is provided with recommended notations and a systematization of the existing knowledge and experience concerning heterostructure formation techniques, addressing the morphology, optoelectronic and magnetic properties, and novel features of different heterostructures. This Review is also devoted to possible applications of these heterostructures and of one-component nanoplatelets in multiple fields, including light-emitting devices and biological imaging.
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Affiliation(s)
- Tatiana K Kormilina
- Department of Optical Physics and Modern Natural Science, ITMO University, 49 Kronverksky Pr, St. Petersburg, 197101, Russia
| | - Sergei A Cherevkov
- Department of Optical Physics and Modern Natural Science, ITMO University, 49 Kronverksky Pr, St. Petersburg, 197101, Russia
| | - Anatoly V Fedorov
- Department of Optical Physics and Modern Natural Science, ITMO University, 49 Kronverksky Pr, St. Petersburg, 197101, Russia
| | - Alexander V Baranov
- Department of Optical Physics and Modern Natural Science, ITMO University, 49 Kronverksky Pr, St. Petersburg, 197101, Russia
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15
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Chen S, Jiang S, Yu H. Diphenylamino-substituted bicarbazole derivative: Hole-transporting material with high glass-transition temperature, good electron and triplet exciton blocking capabilities and efficient hole injection. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2016.12.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Hasanov N, Sharma VK, Hernandez Martinez PL, Tan ST, Demir HV. Critical role of CdSe nanoplatelets in color-converting CdSe/ZnS nanocrystals for InGaN/GaN light-emitting diodes. OPTICS LETTERS 2016; 41:2883-2886. [PMID: 27304313 DOI: 10.1364/ol.41.002883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we report CdSe nanoplatelets that are incorporated into color-converting CdSe/ZnS nanocrystals for InGaN/GaN light-emitting diodes. The critical role of CdSe nanoplatelets as an exciton donor for the color conversion was experimentally investigated. The power conversion efficiency of the hybrid light-emitting diode was found to increase by 23% with the incorporation of the CdSe nanoplatelets. The performance enhancement is ascribed to efficient exciton transfer from the donor CdSe nanoplatelet quantum wells to the acceptor CdSe/ZnS nanocrystal quantum dots through Förster-type nonradiative resonance energy transfer.
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Fan F, Kanjanaboos P, Saravanapavanantham M, Beauregard E, Ingram G, Yassitepe E, Adachi MM, Voznyy O, Johnston AK, Walters G, Kim GH, Lu ZH, Sargent EH. Colloidal CdSe(1-x)S(x) Nanoplatelets with Narrow and Continuously-Tunable Electroluminescence. NANO LETTERS 2015; 15:4611-5. [PMID: 26031416 DOI: 10.1021/acs.nanolett.5b01233] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Colloidal nanoplatelets, quasi-two-dimensional quantum wells, have recently been introduced as colloidal semiconductor materials with the narrowest known photoluminescence line width (∼10 nm). Unfortunately, these materials have not been shown to have continuously tunable emission but rather emit at discrete wavelengths that depend strictly on atomic-layer thickness. Herein, we report a new synthesis approach that overcomes this issue: by alloying CdSe colloidal nanoplatelets with CdS, we finely tune the emission spectrum while still leveraging atomic-scale thickness control. We proceed to demonstrate light-emitting diodes with sub-bandgap turn-on voltages (2.1 V for a device emitting at 2.4 eV) and the narrowest electroluminescence spectrum (FWHM ∼12.5 nm) reported for colloidal semiconductor LEDs.
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Affiliation(s)
- Fengjia Fan
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Pongsakorn Kanjanaboos
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Mayuran Saravanapavanantham
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Eric Beauregard
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Grayson Ingram
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Emre Yassitepe
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Michael M Adachi
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Oleksandr Voznyy
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Andrew K Johnston
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Grant Walters
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Gi-Hwan Kim
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Zheng-Hong Lu
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Edward H Sargent
- †Department of Electrical and Computer Engineering and ‡Department of Materials Science and Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
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