701
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Ai B, Liu C, Deng Z, Wang J, Han J, Zhao X. Low temperature photoluminescence properties of CsPbBr3 quantum dots embedded in glasses. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp02482g] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Size dependence of exciton activation energy, electron–phonon coupling strength, and thermal expansion of the bandgap of CsPbBr3 QDs were studied.
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Affiliation(s)
- Bing Ai
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan
- P. R. China
| | - Chao Liu
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan
- P. R. China
| | - Zhao Deng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- P. R. China
| | - Jing Wang
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan
- P. R. China
| | - Jianjun Han
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan
- P. R. China
| | - Xiujian Zhao
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan
- P. R. China
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702
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Zhu H, Trinh MT, Wang J, Fu Y, Joshi PP, Miyata K, Jin S, Zhu XY. Organic Cations Might Not Be Essential to the Remarkable Properties of Band Edge Carriers in Lead Halide Perovskites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1603072. [PMID: 27792264 DOI: 10.1002/adma.201603072] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 09/02/2016] [Indexed: 05/28/2023]
Abstract
A charge carrier in a lead halide perovskite lattice is protected as a large polaron responsible for the remarkable photophysical properties, irrespective of the cation type. All-inorganic-based APbX3 perovskites may mitigate the stability problem for their applications in solar cells and other optoelectronics.
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Affiliation(s)
- Haiming Zhu
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - M Tuan Trinh
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Jue Wang
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Yongping Fu
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Prakriti P Joshi
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Kiyoshi Miyata
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Song Jin
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - X-Y Zhu
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
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703
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Zhang M, Zheng Z, Fu Q, Chen Z, He J, Zhang S, Yan L, Hu Y, Luo W. Growth and characterization of all-inorganic lead halide perovskite semiconductor CsPbBr3 single crystals. CrystEngComm 2017. [DOI: 10.1039/c7ce01709j] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The crystal structure transforms from orthorhombic to tetragonal at 88 °C and then to cubic at 130 °C.
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Affiliation(s)
- Mingzhi Zhang
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
| | - Zhiping Zheng
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
| | - Qiuyun Fu
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
- State Key Laboratory of Material Processing and Die & Mold Technology
| | - Zheng Chen
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
| | - Jianle He
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
| | - Sen Zhang
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
| | - Liang Yan
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
| | - Yunxiang Hu
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
| | - Wei Luo
- School of Optical and Electronic Information
- Huazhong University of Science and Technology
- Wuhan 430074
- PR China
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704
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Zhang T, Li G, Chang Y, Wang X, Zhang B, Mou H, Jiang Y. Full-spectra hyperfluorescence cesium lead halide perovskite nanocrystals obtained by efficient halogen anion exchange using zinc halogenide salts. CrystEngComm 2017. [DOI: 10.1039/c6ce02314b] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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705
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Tsiwah EA, Ding Y, Li Z, Zhao Z, Wang M, Hu C, Liu X, Sun C, Zhao X, Xie Y. One-pot scalable synthesis of all-inorganic perovskite nanocrystals with tunable morphology, composition and photoluminescence. CrystEngComm 2017. [DOI: 10.1039/c7ce01749a] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tuning the morphology, composition and photoluminescence emission over almost the entire visible region of all-inorganic cesium lead halide nanocrystals by a general and facile one-pot synthetic approach.
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Affiliation(s)
- Emmanuel Acheampong Tsiwah
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology (WUT)
- Wuhan 430070
- P. R. China
| | - Yanxi Ding
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology (WUT)
- Wuhan 430070
- P. R. China
| | - Zixiong Li
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology (WUT)
- Wuhan 430070
- P. R. China
| | - Zhiyong Zhao
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology (WUT)
- Wuhan 430070
- P. R. China
| | - Mingqing Wang
- UCL Institute for Materials Discovery
- University College of London
- London WC1E 7JE
- UK
| | - Chao Hu
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology (WUT)
- Wuhan 430070
- P. R. China
| | - Xiaoqing Liu
- Center for Materials Research and Analysis
- Wuhan University of Technology
- Wuhan
- P.R. China
| | - Chenghua Sun
- Department of Chemistry and Biotechnology
- Faculty of Science, Engineering & Technology
- Swinburne University of Technology
- Hawthorn
- Australia
| | - Xiujian Zhao
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology (WUT)
- Wuhan 430070
- P. R. China
| | - Yi Xie
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology (WUT)
- Wuhan 430070
- P. R. China
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706
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Begum R, Parida MR, Abdelhady AL, Murali B, Alyami NM, Ahmed GH, Hedhili MN, Bakr OM, Mohammed OF. Engineering Interfacial Charge Transfer in CsPbBr 3 Perovskite Nanocrystals by Heterovalent Doping. J Am Chem Soc 2016; 139:731-737. [PMID: 27977176 DOI: 10.1021/jacs.6b09575] [Citation(s) in RCA: 177] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Since compelling device efficiencies of perovskite solar cells have been achieved, investigative efforts have turned to understand other key challenges in these systems, such as engineering interfacial energy-level alignment and charge transfer (CT). However, these types of studies on perovskite thin-film devices are impeded by the morphological and compositional heterogeneity of the films and their ill-defined surfaces. Here, we use well-defined ligand-protected perovskite nanocrystals (NCs) as model systems to elucidate the role of heterovalent doping on charge-carrier dynamics and energy level alignment at the interface of perovskite NCs with molecular acceptors. More specifically, we develop an in situ doping approach for colloidal CsPbBr3 perovskite NCs with heterovalent Bi3+ ions by hot injection to precisely tune their band structure and excited-state dynamics. This synthetic method allowed us to map the impact of doping on CT from the NCs to different molecular acceptors. Using time-resolved spectroscopy with broadband capability, we clearly demonstrate that CT at the interface of NCs can be tuned and promoted by metal ion doping. We found that doping increases the energy difference between states of the molecular acceptor and the donor moieties, subsequently facilitating the interfacial CT process. This work highlights the key variable components not only for promoting interfacial CT in perovskites, but also for establishing a higher degree of precision and control over the surface and the interface of perovskite molecular acceptors.
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Affiliation(s)
- Raihana Begum
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Manas R Parida
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Ahmed L Abdelhady
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Banavoth Murali
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Noktan M Alyami
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Ghada H Ahmed
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Mohamed Nejib Hedhili
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Osman M Bakr
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Omar F Mohammed
- KAUST Solar Center, Division of Physical Sciences and Engineering and ‡Imaging and Characterization Laboratory, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
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707
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Raja SN, Bekenstein Y, Koc MA, Fischer S, Zhang D, Lin L, Ritchie RO, Yang P, Alivisatos AP. Encapsulation of Perovskite Nanocrystals into Macroscale Polymer Matrices: Enhanced Stability and Polarization. ACS APPLIED MATERIALS & INTERFACES 2016; 8:35523-35533. [PMID: 27991752 DOI: 10.1021/acsami.6b09443] [Citation(s) in RCA: 189] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Lead halide perovskites hold promise for photonic devices, due to their superior optoelectronic properties. However, their use is limited by poor stability and toxicity. We demonstrate enhanced water and light stability of high-surface-area colloidal perovskite nanocrystals by encapsulation of colloidal CsPbBr3 quantum dots into matched hydrophobic macroscale polymeric matrices. This is achieved by mixing the quantum dots with presynthesized high-molecular-weight polymers. We monitor the photoluminescence quantum yield of the perovskite-polymer nanocomposite films under water-soaking for the first time, finding no change even after >4 months of continuous immersion in water. Furthermore, photostability is greatly enhanced in the macroscale polymer-encapsulated nanocrystal perovskites, which sustain >1010 absorption events per quantum dot prior to photodegradation, a significant threshold for potential device use. Control of the quantum dot shape in these thin-film polymer composite enables color tunability via strong quantum-confinement in nanoplates and significant room temperature polarized emission from perovskite nanowires. Not only does the high-molecular-weight polymer protect the perovskites from the environment but also no escaped lead was detected in water that was in contact with the encapsulated perovskites for months. Our ligand-passivated perovskite-macroscale polymer composites provide a robust platform for diverse photonic applications.
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Affiliation(s)
- Shilpa N Raja
- 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
| | - Matthew A Koc
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Stefan Fischer
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Dandan Zhang
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | | | - Robert O Ritchie
- Materials Sciences Division, Lawrence Berkeley National Laboratory , 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
| | - A Paul Alivisatos
- 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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708
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Wang Y, Li X, Sreejith S, Cao F, Wang Z, Stuparu MC, Zeng H, Sun H. Photon Driven Transformation of Cesium Lead Halide Perovskites from Few-Monolayer Nanoplatelets to Bulk Phase. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:10637-10643. [PMID: 27714913 DOI: 10.1002/adma.201604110] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Indexed: 05/22/2023]
Abstract
Influence of light exposure on cesium lead halide nanostructures has been explored. A discovery of photon driven transformation (PDT) in 2D CsPbBr3 nanoplatelets is reported, in which the quantum-confined few-monolayer nanoplatelets will convert to bulk phase under very low irradiation intensity (≈20 mW cm-2 ). Benefiting from the remarkable emission color change during PDT, the multicolor luminescence photopatterns and facile information photo-encoding are established.
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Affiliation(s)
- Yue Wang
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Xiaoming Li
- Institute of Optoelectronics and Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
- State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210085, China
| | - Sivaramapanicker Sreejith
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Fei Cao
- Institute of Optoelectronics and Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Zeng Wang
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Mihaiela Corina Stuparu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Haibo Zeng
- Institute of Optoelectronics and Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Handong Sun
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
- Centre for Disruptive Photonic Technologies (CDPT), Nanyang Technological University, Singapore, 637371, Singapore
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709
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Song YH, Yoo JS, Kang BK, Choi SH, Ji EK, Jung HS, Yoon DH. Long-term stable stacked CsPbBr 3 quantum dot films for highly efficient white light generation in LEDs. NANOSCALE 2016; 8:19523-19526. [PMID: 27869253 DOI: 10.1039/c6nr07410c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report highly efficient ethyl cellulose with CsPbBr3 perovskite QD films for white light generation in LED application. Ethyl cellulose with CsPbBr3 quantum dots is applied with Sr2Si5N8 : Eu2+ red phosphor on an InGaN blue chip, achieving a highly efficient luminous efficacy of 67.93 lm W-1 under 20 mA current.
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Affiliation(s)
- Young Hyun Song
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
| | - Jin Sun Yoo
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
| | - Bong Kyun Kang
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
| | - Seung Hee Choi
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
| | - Eun Kyung Ji
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Hyun Suk Jung
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
| | - Dae Ho Yoon
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea. and SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Republic of Korea
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710
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Sun C, Zhang Y, Ruan C, Yin C, Wang X, Wang Y, Yu WW. Efficient and Stable White LEDs with Silica-Coated Inorganic Perovskite Quantum Dots. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:10088-10094. [PMID: 27717018 DOI: 10.1002/adma.201603081] [Citation(s) in RCA: 318] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 07/27/2016] [Indexed: 05/22/2023]
Abstract
A white light-emitting diode (0.33, 0.33) is fabricated using perovskite quantum dot/silica composites. It is shown to have greatly improved stability.
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Affiliation(s)
- Chun Sun
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Yu Zhang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Cheng Ruan
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Chunyang Yin
- National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing, 210093, China
| | - Xiaoyong Wang
- National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing, 210093, China
| | - Yiding Wang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - William W Yu
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
- Department of Chemistry and Physics, Louisiana State University, Shreveport, LA, 71115, USA
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711
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Huang Y, Fang M, Zou G, Zhang B, Wang H. Monochromatic and electrochemically switchable electrochemiluminescence of perovskite CsPbBr 3 nanocrystals. NANOSCALE 2016; 8:18734-18739. [PMID: 27790659 DOI: 10.1039/c6nr06456f] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Cubic-shaped perovskite CsPbBr3 nanocrystals (NCs) could be electrochemically injected with holes (or electrons) to produce several charged states under different oxidizing and reducing potentials, and then bring out electrochemiluminescence (ECL) of higher color purity than traditional ECL chemicals and metal chalcogenide NCs, in both annihilation and co-reactant routes. The difference of electrochemical gaps between varied hole and electron injecting potentials displayed little effect on the ECL spectrum and colour purity of CsPbBr3 NCs. All the excited states generated under different oxidizing and reducing potential couples in ECL of CsPbBr3 NCs were the same as those in photoluminescence, as all the ECL spectra were almost identical to the CsPbBr3 NCs' photoluminescence spectrum. Importantly, the ECL of CsPbBr3 NCs was electrochemically switchable and displayed an obvious "on/off" type feature by changing the sequence of hole injecting and electron injecting processes, as strong ECL could be obtained by injecting holes onto the electron injected NCs, while no or very weak ECL was obtained in the reversed way.
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Affiliation(s)
- Yan Huang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China. and Department of Chemistry, Liaocheng University, Liaocheng, 252059, China
| | - Mingxiang Fang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
| | - Guizheng Zou
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
| | - Bin Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
| | - Huaisheng Wang
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, China
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712
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Lin J, Gomez L, de Weerd C, Fujiwara Y, Gregorkiewicz T, Suenaga K. Direct Observation of Band Structure Modifications in Nanocrystals of CsPbBr 3 Perovskite. NANO LETTERS 2016; 16:7198-7202. [PMID: 27733042 DOI: 10.1021/acs.nanolett.6b03552] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We investigate the variation of the bandgap energy of single quantum dots of CsPbBr3 inorganic halide perovskite as a function of size and shape and upon embedding within an ensemble. For that purpose, we make use of valence-loss electron spectroscopy with Z-contrast annular dark-field (ADF) imaging in a state-of-the-art low-voltage monochromatic scanning transmission electron microscope. In the experiment, energy absorption is directly mapped onto individual quantum dots, whose dimensions and location are simultaneously measured to the highest precision. In that way, we establish an intimate relation between quantum dot size and even shape and its bandgap energy on a single object level. We explicitly follow the bandgap increase in smaller quantum dots due to quantum confinement and demonstrate that it is predominantly governed by the smallest of the three edges of the cuboidal perovskite dot. We also show the presence of an effective coupling between proximal dots in an ensemble, leading to band structure modification. These unique insights are directly relevant to the development of custom-designed quantum structures and solids which will be realized by purposeful assemblage of individually characterized and selected quantum dots, serving as building blocks.
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Affiliation(s)
- Junhao Lin
- National Institute of Advanced Industrial Science and Technology (AIST) , AIST Central 5, Tsukuba 305-8565, Japan
| | - Leyre Gomez
- Institute of Physics, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Chris de Weerd
- Institute of Physics, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Yasufumi Fujiwara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tom Gregorkiewicz
- Institute of Physics, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kazutomo Suenaga
- National Institute of Advanced Industrial Science and Technology (AIST) , AIST Central 5, Tsukuba 305-8565, Japan
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713
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Huang H, Lin H, Kershaw SV, Susha AS, Choy WCH, Rogach AL. Polyhedral Oligomeric Silsesquioxane Enhances the Brightness of Perovskite Nanocrystal-Based Green Light-Emitting Devices. J Phys Chem Lett 2016; 7:4398-4404. [PMID: 27774786 DOI: 10.1021/acs.jpclett.6b02224] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The beneficial role of the insulating material polyhedral oligomeric silsesquioxane (POSS) as a solution additive or an additional hole-blocking layer to enhance the performance of electroluminescent green light-emitting devices (LEDs) based on CsPbBr3 perovskite nanocrystals is demonstrated. POSS improves the surface coverage and the morphological features of the films deposited either from supernatant or suspension of perovskite nanocrystals. The external quantum efficiency and the luminance efficiency of LEDs with an additional POSS layer reach 0.35% and 1.20 cd/A, respectively, constituting a more than 17-fold enhancement to the reference devices without POSS; the LED peak luminance reaches 2983 cd/m2, and the device stability is improved. The POSS acts as a hole-blocking layer between the perovskite nanocrystals and TPBi, keeping both electrons and holes located within the active layer for an efficient recombination.
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Affiliation(s)
- He Huang
- Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong , Kowloon, Hong Kong, SAR China
| | - Hong Lin
- Department of Electrical and Electronic Engineering, The University of Hong Kong , Pokfulam Road, Hong Kong, SAR China
| | - Stephen V Kershaw
- Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong , Kowloon, Hong Kong, SAR China
| | - Andrei S Susha
- Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong , Kowloon, Hong Kong, SAR China
| | - Wallace C H Choy
- Department of Electrical and Electronic Engineering, The University of Hong Kong , Pokfulam Road, Hong Kong, SAR China
| | - Andrey L Rogach
- Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong , Kowloon, Hong Kong, SAR China
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714
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Lu H, Zhou Z, Prezhdo OV, Brutchey RL. Exposing the Dynamics and Energetics of the N-Heterocyclic Carbene–Nanocrystal Interface. J Am Chem Soc 2016; 138:14844-14847. [DOI: 10.1021/jacs.6b09065] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Haipeng Lu
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Zhaohui Zhou
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
- International
Research Center for Renewable Energy, State Key Laboratory of Multiphase
Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Oleg V. Prezhdo
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Richard L. Brutchey
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
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715
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Jonathan De Roo. Chempluschem 2016; 81:1137. [PMID: 31964098 DOI: 10.1002/cplu.201600517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
"My first experiment was an absolute failure. The glassware broke and a thermometer was destroyed. The best advice I have ever been given is to stop bothering about things you cannot influence." This and more about Jonathan De Roo can be found on page 1137.
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716
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Protesescu L, Yakunin S, Bodnarchuk MI, Bertolotti F, Masciocchi N, Guagliardi A, Kovalenko MV. Monodisperse Formamidinium Lead Bromide Nanocrystals with Bright and Stable Green Photoluminescence. J Am Chem Soc 2016; 138:14202-14205. [PMID: 27737545 PMCID: PMC5799874 DOI: 10.1021/jacs.6b08900] [Citation(s) in RCA: 183] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
Bright green emitters
with adjustable photoluminescence (PL) maxima
in the range of 530–535 nm and full-width at half-maxima (fwhm)
of <25 nm are particularly desirable for applications in television
displays and related technologies. Toward this goal, we have developed
a facile synthesis of highly monodisperse, cubic-shaped formamidinium
lead bromide nanocrystals (FAPbBr3 NCs) with perovskite
crystal structure, tunable PL in the range of 470–540 nm by
adjusting the nanocrystal size (5–12 nm), high quantum yield
(QY) of up to 85% and PL fwhm of <22 nm. High QYs are also retained
in films of FAPbBr3 NCs. In addition, these films exhibit
low thresholds of 14 ± 2 μJ cm–2 for
amplified spontaneous emission.
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Affiliation(s)
- Loredana Protesescu
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich , Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland.,Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Sergii Yakunin
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich , Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland.,Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Maryna I Bodnarchuk
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich , Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland.,Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Federica Bertolotti
- Dipartimento di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell'Insubria , via Valleggio 11, I-22100 Como, Italy
| | - Norberto Masciocchi
- Dipartimento di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell'Insubria , via Valleggio 11, I-22100 Como, Italy
| | - Antonietta Guagliardi
- Dipartimento di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell'Insubria , via Valleggio 11, I-22100 Como, Italy.,Istituto di Crystallografia and To.Sca.Lab, Consiglio Nazionale delle Ricerche , Valleggio 11, I-22100 Como, Italy
| | - Maksym V Kovalenko
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Bioscience, ETH Zürich , Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland.,Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
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717
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Malgras V, Tominaka S, Ryan JW, Henzie J, Takei T, Ohara K, Yamauchi Y. Observation of Quantum Confinement in Monodisperse Methylammonium Lead Halide Perovskite Nanocrystals Embedded in Mesoporous Silica. J Am Chem Soc 2016; 138:13874-13881. [PMID: 27667498 DOI: 10.1021/jacs.6b05608] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Hybrid organic-inorganic metal halide perovskites have fascinating electronic properties and have already been implemented in various devices. Although the behavior of bulk metal halide perovskites has been widely studied, the properties of perovskite nanocrystals are less well-understood because synthesizing them is still very challenging, in part because of stability. Here we demonstrate a simple and versatile method to grow monodisperse CH3NH3PbBrxIx-3 perovskite nanocrystals inside mesoporous silica templates. The size of the nanocrystal is governed by the pore size of the templates (3.3, 3.7, 4.2, 6.2, and 7.1 nm). In-depth structural analysis shows that the nanocrystals maintain the perovskite crystal structure, but it is slightly distorted. Quantum confinement was observed by tuning the size of the particles via the template. This approach provides an additional route to tune the optical bandgap of the nanocrystal. The level of quantum confinement was modeled taking into account the dimensions of the rod-shaped nanocrystals and their close packing inside the channels of the template. Photoluminescence measurements on CH3NH3PbBr clearly show a shift from green to blue as the pore size is decreased. Synthesizing perovskite nanostructures in templates improves their stability and enables tunable electronic properties via quantum confinement. These structures may be useful as reference materials for comparison with other perovskites, or as functional materials in all solid-state light-emitting diodes.
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Affiliation(s)
- Victor Malgras
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Satoshi Tominaka
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - James W Ryan
- International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Joel Henzie
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Toshiaki Takei
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Koji Ohara
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute , 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Yusuke Yamauchi
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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718
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Pan J, Quan LN, Zhao Y, Peng W, Murali B, Sarmah SP, Yuan M, Sinatra L, Alyami NM, Liu J, Yassitepe E, Yang Z, Voznyy O, Comin R, Hedhili MN, Mohammed OF, Lu ZH, Kim DH, Sargent EH, Bakr OM. Highly Efficient Perovskite-Quantum-Dot Light-Emitting Diodes by Surface Engineering. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:8718-8725. [PMID: 27529532 DOI: 10.1002/adma.201600784] [Citation(s) in RCA: 407] [Impact Index Per Article: 50.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 07/10/2016] [Indexed: 05/20/2023]
Abstract
A two-step ligand-exchange strategy is developed, in which the long-carbon- chain ligands on all-inorganic perovskite (CsPbX3 , X = Br, Cl) quantum dots (QDs) are replaced with halide-ion-pair ligands. Green and blue light-emitting diodes made from the halide-ion-pair-capped quantum dots exhibit high external quantum efficiencies compared with the untreated QDs.
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Affiliation(s)
- Jun Pan
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Li Na Quan
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada
- Department of Chemistry and Nano Science, Ewha Woman's University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea
| | - Yongbiao Zhao
- Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario, M5S 3E4, Canada
| | - Wei Peng
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Banavoth Murali
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Smritakshi P Sarmah
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Mingjian Yuan
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada
| | - Lutfan Sinatra
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Noktan M Alyami
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Jiakai Liu
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Emre Yassitepe
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada
| | - Zhenyu Yang
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada
| | - Oleksandr Voznyy
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada
| | - Riccardo Comin
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada
| | - Mohamed N Hedhili
- Imaging and Characterization Laboratory, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Omar F Mohammed
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Zheng Hong 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 Woman's University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
| | - Osman M Bakr
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
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719
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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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720
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De Roo J, Baquero EA, Coppel Y, De Keukeleere K, Van Driessche I, Nayral C, Hens Z, Delpech F. Insights into the Ligand Shell, Coordination Mode, and Reactivity of Carboxylic Acid Capped Metal Oxide Nanocrystals. Chempluschem 2016; 81:1216-1223. [DOI: 10.1002/cplu.201600372] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 08/26/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Jonathan De Roo
- Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
| | - Edwin A. Baquero
- INSA, UPS, CNRS; Laboratoire de Physique et Chimie des Nano-Objets (LPCNO); Université de Toulouse; 135 avenue de Rangueil 31077 Toulouse cedex 4 France
| | - Yannick Coppel
- Laboratoire de Chimie de Coordination, CNRS, UPR 8241; Université de Toulouse; 31077 Toulouse cedex 4 France
| | - Katrien De Keukeleere
- Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
| | - Isabel Van Driessche
- Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
| | - Céline Nayral
- INSA, UPS, CNRS; Laboratoire de Physique et Chimie des Nano-Objets (LPCNO); Université de Toulouse; 135 avenue de Rangueil 31077 Toulouse cedex 4 France
| | - Zeger Hens
- Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
| | - Fabien Delpech
- INSA, UPS, CNRS; Laboratoire de Physique et Chimie des Nano-Objets (LPCNO); Université de Toulouse; 135 avenue de Rangueil 31077 Toulouse cedex 4 France
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721
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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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722
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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: 317] [Impact Index Per Article: 39.6] [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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723
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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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724
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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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725
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Yuan H, Debroye E, Caliandro G, Janssen KP, van Loon J, Kirschhock CEA, Martens JA, Hofkens J, Roeffaers MBJ. Photoluminescence Blinking of Single-Crystal Methylammonium Lead Iodide Perovskite Nanorods Induced by Surface Traps. ACS OMEGA 2016; 1:148-159. [PMID: 27617323 PMCID: PMC5013672 DOI: 10.1021/acsomega.6b00107] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 07/14/2016] [Indexed: 05/25/2023]
Abstract
Photoluminescence (PL) of organometal halide perovskite materials reflects the charge dynamics inside of the material and thus contains important information for understanding the electro-optical properties of the material. Interpretation of PL blinking of methylammonium lead iodide (MAPbI3) nanostructures observed on polycrystalline samples remains puzzling owing to their intrinsic disordered nature. Here, we report a novel method for the synthesis of high-quality single-crystal MAPbI3 nanorods and demonstrate a single-crystal study on MAPbI3 PL blinking. At low excitation power densities, two-state blinking was found on individual nanorods with dimensions of several hundred nanometers. A super-resolution localization study on the blinking of individual nanorods showed that single crystals of several hundred nanometers emit and blink as a whole, without showing changes in the localization center over the crystal. Moreover, both the blinking ON and OFF times showed power-law distributions, indicating trapping-detrapping processes. This is further supported by the PL decay times of the individual nanorods, which were found to correlate with the ON/OFF states. Furthermore, a strong environmental dependence of the nanorod PL blinking was revealed by comparing the measurements in vacuum, nitrogen, and air, implying that traps locate close to crystal surfaces. We explain our observations by proposing surface charge traps that are likely related to under-coordinated lead ions and methylammonium vacancies to result in the PL blinking observed here.
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Affiliation(s)
- Haifeng Yuan
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Elke Debroye
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Giorgio Caliandro
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Kris P.
F. Janssen
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Jordi van Loon
- Centre
for Surface Chemistry and Catalysis, KU
Leuven, Kasteelpark Arenberg
23, 3001 Heverlee, Belgium
| | | | - Johan A. Martens
- Centre
for Surface Chemistry and Catalysis, KU
Leuven, Kasteelpark Arenberg
23, 3001 Heverlee, Belgium
| | - Johan Hofkens
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
- RIES, Hokkaido
University,
N20W10, Kita-Ward, Sapporo 001-0020, Japan
| | - Maarten B. J. Roeffaers
- Centre
for Surface Chemistry and Catalysis, KU
Leuven, Kasteelpark Arenberg
23, 3001 Heverlee, Belgium
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726
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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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727
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Lan X, Voznyy O, García de Arquer FP, Liu M, Xu J, Proppe AH, Walters G, Fan F, Tan H, Liu M, Yang Z, Hoogland S, Sargent EH. 10.6% Certified Colloidal Quantum Dot Solar Cells via Solvent-Polarity-Engineered Halide Passivation. NANO LETTERS 2016; 16:4630-4. [PMID: 27351104 DOI: 10.1021/acs.nanolett.6b01957] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Colloidal quantum dot (CQD) solar cells are solution-processed photovoltaics with broad spectral absorption tunability. Major advances in their efficiency have been made via improved CQD surface passivation and device architectures with enhanced charge carrier collection. Herein, we demonstrate a new strategy to improve further the passivation of CQDs starting from the solution phase. A cosolvent system is employed to tune the solvent polarity in order to achieve the solvation of methylammonium iodide (MAI) and the dispersion of hydrophobic PbS CQDs simultaneously in a homogeneous phase, otherwise not achieved in a single solvent. This process enables MAI to access the CQDs to confer improved passivation. This, in turn, allows for efficient charge extraction from a thicker photoactive layer device, leading to a certified solar cell power conversion efficiency of 10.6%, a new certified record in CQD photovoltaics.
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Affiliation(s)
- Xinzheng Lan
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Oleksandr Voznyy
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - F Pelayo García de Arquer
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Mengxia Liu
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Jixian Xu
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Andrew H Proppe
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Grant Walters
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Fengjia Fan
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Hairen Tan
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Min Liu
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Zhenyu Yang
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Sjoerd Hoogland
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
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728
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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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729
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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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730
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Jellicoe TC, Richter JM, Glass HFJ, Tabachnyk M, Brady R, Dutton SE, Rao A, Friend RH, Credgington D, Greenham NC, Böhm ML. Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals. J Am Chem Soc 2016; 138:2941-4. [DOI: 10.1021/jacs.5b13470] [Citation(s) in RCA: 631] [Impact Index Per Article: 78.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Tom C. Jellicoe
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Johannes M. Richter
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Hugh F. J. Glass
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Maxim Tabachnyk
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Ryan Brady
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Siân E. Dutton
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Akshay Rao
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Richard H. Friend
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Dan Credgington
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Neil C. Greenham
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
| | - Marcus L. Böhm
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
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731
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Li M, Zhang X, Lu S, Yang P. Phase transformation, morphology control, and luminescence evolution of cesium lead halide nanocrystals in the anion exchange process. RSC Adv 2016. [DOI: 10.1039/c6ra22070c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
CsPbX3 NCs with different photoluminescence properties were synthesized by anion exchange. A mechanism was supposed by exploring luminescence evolution.
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Affiliation(s)
- Meng Li
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Xiao Zhang
- School of Chemistry
- University of New South Wales
- Sydney 2052
- Australia
| | - Simin Lu
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Ping Yang
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
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732
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De Roo J, De Keukeleere K, Hens Z, Van Driessche I. From ligands to binding motifs and beyond; the enhanced versatility of nanocrystal surfaces. Dalton Trans 2016; 45:13277-83. [DOI: 10.1039/c6dt02410f] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Surface chemistry bridges the gap between nanocrystal synthesis and their applications.
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Affiliation(s)
- J. De Roo
- Department of Inorganic and Physical Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | - K. De Keukeleere
- Department of Inorganic and Physical Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | - Z. Hens
- Department of Inorganic and Physical Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | - I. Van Driessche
- Department of Inorganic and Physical Chemistry
- Ghent University
- 9000 Gent
- Belgium
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