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Wang L, Wang H, Nughays R, Ogieglo W, Yin J, Gutiérrez-Arzaluz L, Zhang X, Wang JX, Pinnau I, Bakr OM, Mohammed OF. Phonon-driven transient bandgap renormalization in perovskite single crystals. MATERIALS HORIZONS 2023; 10:4192-4201. [PMID: 37431707 DOI: 10.1039/d3mh00570d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
Tailoring the electronic structure of perovskite materials on ultrafast timescales is expected to shed light on optimizing optoelectronic applications. However, the transient bandgap renormalization observed upon photoexcitation is commonly explained by many-body interactions of optically created electrons and holes, which shrink the original bandgap by a few tens of millielectronvolts with a sub-picosecond time constant, while the accompanying phonon-induced effect remains hitherto unexplored. Here we unravel a significant contribution of hot phonons in the photo-induced transient bandgap renormalization in MAPbBr3 single crystals, as evidenced by asymmetric spectral evolutions and transient reflection spectral shifts in the picosecond timescale. Moreover, we performed a spatiotemporal study upon optical excitation with time-resolved scanning electron microscopy and identified that the surface charge carrier diffusion and transient bandgap renormalization are strongly correlated in time. These findings highlight the need to re-evaluate current theories on photo-induced bandgap renormalization and provide a new approach for precisely controlling the optical and electronic properties of perovskite materials, enabling the design and fabrication of high-performance optoelectronic devices with exceptional efficiency and unique properties.
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Affiliation(s)
- Lijie Wang
- Advanced Membranes and Porous Materials Centre (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
| | - Hong Wang
- Advanced Membranes and Porous Materials Centre (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
- KAUST Catalysis Centre, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Razan Nughays
- Advanced Membranes and Porous Materials Centre (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
| | - Wojciech Ogieglo
- Advanced Membranes and Porous Materials Centre (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
| | - Jun Yin
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, P. R. China
| | - Luis Gutiérrez-Arzaluz
- Advanced Membranes and Porous Materials Centre (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
- KAUST Catalysis Centre, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Xinyuan Zhang
- KAUST Catalysis Centre, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jian-Xin Wang
- Advanced Membranes and Porous Materials Centre (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
| | - Ingo Pinnau
- Advanced Membranes and Porous Materials Centre (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
| | - Osman M Bakr
- KAUST Catalysis Centre, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Omar F Mohammed
- Advanced Membranes and Porous Materials Centre (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
- KAUST Catalysis Centre, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
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Kerner RA, Cohen AV, Xu Z, Kirmani AR, Park SY, Harvey SP, Murphy JP, Cawthorn RC, Giebink NC, Luther JM, Zhu K, Berry JJ, Kronik L, Rand BP. Electrochemical Doping of Halide Perovskites by Noble Metal Interstitial Cations. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2302206. [PMID: 37052234 DOI: 10.1002/adma.202302206] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/29/2023] [Indexed: 06/04/2023]
Abstract
Metal halide perovskites are an attractive class of semiconductors, but it has proven difficult to control their electronic doping by conventional strategies due to screening and compensation by mobile ions or ionic defects. Noble-metal interstitials represent an under-studied class of extrinsic defects that plausibly influence many perovskite-based devices. In this work, doping of metal halide perovskites is studied by electrochemically formed Au+ interstitial ions, combining experimental data on devices with a computational analysis of Au+ interstitial defects based on density functional theory (DFT). Analysis suggests that Au+ cations can be easily formed and migrate through the perovskite bulk via the same sites as iodine interstitials (Ii + ). However, whereas Ii + compensates n-type doping by electron capture, the noble-metal interstitials act as quasi-stable n-dopants. Experimentally, voltage-dependent, dynamic doping by current density-time (J-t), electrochemical impedance, and photoluminescence measurements are characterized. These results provide deeper insight into the potential beneficial and detrimental impacts of metal electrode reactions on long-term performance of perovskite photovoltaic and light-emitting diodes, as well as offer an alternative doping explanation for the valence switching mechanism of halide-perovskite-based neuromorphic and memristive devices.
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Affiliation(s)
- Ross A Kerner
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Ayala V Cohen
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovoth, 76100, Israel
| | - Zhaojian Xu
- Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Ahmad R Kirmani
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - So Yeon Park
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Steven P Harvey
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - John P Murphy
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Robert C Cawthorn
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Noel C Giebink
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Joseph M Luther
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Kai Zhu
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Joseph J Berry
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
- Department of Physics, University of Colorado Boulder, Boulder, CO, 80309, USA
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Leeor Kronik
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovoth, 76100, Israel
| | - Barry P Rand
- Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA
- Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, 08544, USA
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Dávila Cerón V, Illicachi LA, Insuasty B. Triazine: An Important Building Block of Organic Materials for Solar Cell Application. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010257. [PMID: 36615449 PMCID: PMC9822301 DOI: 10.3390/molecules28010257] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/17/2022] [Accepted: 12/23/2022] [Indexed: 12/30/2022]
Abstract
Since the beginning of the 21st century, triazine-based molecules have been employed to construct different organic materials due to their unique optoelectronic properties. Among their applications, photovoltaics stands out because of the current need to develop efficient, economic, and green alternatives to energy generation based mainly on fossil fuels. Here, we review all the development of triazine-based organic materials for solar cell applications, including organic solar cells, dye-sensitized solar cells, and perovskite solar cells. Firstly, we attempt to illustrate the main synthetic routes to prepare triazine derivatives. Then, we introduce the main aspects associated with solar cells and their performance. Afterward, we discuss different works focused on the preparation, characterization, and evaluation of triazine derivatives in solar cells, distinguishing the type of photovoltaics and the role of the triazine-based material in their performance (e.g., as a donor, acceptor, hole-transporting material, electron-transporting material, among others). Throughout this review, the progress, drawbacks, and main issues of the performance of the mentioned solar cells are exposed and discussed. Finally, some conclusions and perspectives about this research topic are mentioned.
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Affiliation(s)
- Valeria Dávila Cerón
- Heterocyclic Compounds Research Group, Department of Chemistry, Universidad del Valle, A.A., Cali 25360, Colombia
| | - Luis Alberto Illicachi
- Research Group of Chemical and Biotechnology, Faculty of Basic Sciences, Universidad Santiago de Cali, Cali 760035, Colombia
- Correspondence:
| | - Braulio Insuasty
- Heterocyclic Compounds Research Group, Department of Chemistry, Universidad del Valle, A.A., Cali 25360, Colombia
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Yang LS, Lin EC, Hua YH, Hsu CA, Chiu HZ, Lo PH, Chao YC. Circularly Polarized Photoluminescence of Chiral 2D Halide Perovskites at Room Temperature. ACS APPLIED MATERIALS & INTERFACES 2022; 14:54090-54100. [PMID: 36420750 DOI: 10.1021/acsami.2c16359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Chiral halide perovskites have attracted considerable attention because of their chiroptical, second-harmonic generation, and ferroelectricity properties and their potential application in chiroptoelectronics and chiral spintronics. However, the fundamental research of these properties is insufficient. In this work, chiral perovskites were synthesized using precursor solutions with various stoichiometric ratios ⟨n⟩. The chiral perovskite film prepared from the solution with ⟨n⟩ = 1 is composed of (R-/S-/rac-MBA)2PbBr4, whereas the films prepared from the solutions with ⟨n⟩ larger than 1 are a mixture of (R-/S-/rac-MBA)2(CsMA)n-1PbnBr3n+1 with n = 1 and large n values. A photoluminescence quantum yield of approximately 90 was obtained. Symmetric circular dichroism (CD) spectra were observed without an external magnetic field. Under various magnetic fields, magnetic field-induced CD features are superimposed with the intrinsic chirality-induced CD features. For the ⟨n⟩ = 1 chiral perovskite film, the energy level splitting induced by chiral molecules are a few 10 μeV, whereas the energy level splitting induced by magnetic fields are at the range of ∼-250 to ∼250 μeV. Circularly polarized photoluminescence spectra were observed at room temperature and associated with the spin-preserved energy funneling from highly energetic phases to the lower energetic phases.
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Affiliation(s)
- Lan-Sheng Yang
- Department of Physics, National Taiwan Normal University, Taipei11677, Taiwan, R.O.C
| | - En-Chi Lin
- Department of Physics, National Taiwan Normal University, Taipei11677, Taiwan, R.O.C
| | - Yi-Hsiu Hua
- Department of Physics, National Taiwan Normal University, Taipei11677, Taiwan, R.O.C
| | - Chin-An Hsu
- Department of Physics, National Taiwan Normal University, Taipei11677, Taiwan, R.O.C
| | - Hao-Zhe Chiu
- Department of Physics, National Taiwan Normal University, Taipei11677, Taiwan, R.O.C
| | - Pei-Hsuan Lo
- Department of Physics, National Taiwan Normal University, Taipei11677, Taiwan, R.O.C
| | - Yu-Chiang Chao
- Department of Physics, National Taiwan Normal University, Taipei11677, Taiwan, R.O.C
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu300093, Taiwan
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