Inorganic A-site cations improve the performance of band-edge carriers in lead halide perovskites.

IF 4.1 3区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Frontiers of Optoelectronics Pub Date : 2023-09-25 DOI:10.1007/s12200-023-00078-z
Cheng Wang, Yaoguang Rong, Ti Wang
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Abstract

In lead halide perovskites, organic A-site cations are generally introduced to fine-tune the properties. One of the questions under debate is whether organic A-site cations are essential for high-performance solar cells. In this study, we compare the band edge carrier dynamics and diffusion process in MAPbBr3 and CsPbBr3 single-crystal microplates. By transient absorption microscopy, the band-edge carrier diffusion constants are unraveled. With the replacement of inorganic A-site cations, the diffusion constant in CsPbBr3 increases almost 8 times compared to that in MAPbBr3. This work reveals that introducing inorganic A-site cations can lead to a much larger diffusion length and improve the performance of band-edge carriers.

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无机A位阳离子改善了卤化铅钙钛矿中带边载流子的性能。
在卤化铅钙钛矿中,通常引入有机A位阳离子来微调其性质。争论中的一个问题是有机A位阳离子是否对高性能太阳能电池至关重要。在本研究中,我们比较了MAPbBr3和CsPbBr3单晶微孔板中的带边载流子动力学和扩散过程。通过瞬态吸收显微镜,揭示了带边载流子的扩散常数。随着无机A位阳离子的取代,CsPbBr3中的扩散常数比MAPbBr3增加了近8倍。这项工作表明,引入无机A位阳离子可以导致更大的扩散长度,并提高带边载流子的性能。
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来源期刊
Frontiers of Optoelectronics
Frontiers of Optoelectronics ENGINEERING, ELECTRICAL & ELECTRONIC-
CiteScore
7.80
自引率
0.00%
发文量
583
期刊介绍: Frontiers of Optoelectronics seeks to provide a multidisciplinary forum for a broad mix of peer-reviewed academic papers in order to promote rapid communication and exchange between researchers in China and abroad. It introduces and reflects significant achievements being made in the field of photonics or optoelectronics. The topics include, but are not limited to, semiconductor optoelectronics, nano-photonics, information photonics, energy photonics, ultrafast photonics, biomedical photonics, nonlinear photonics, fiber optics, laser and terahertz technology and intelligent photonics. The journal publishes reviews, research articles, letters, comments, special issues and so on. Frontiers of Optoelectronics especially encourages papers from new emerging and multidisciplinary areas, papers reflecting the international trends of research and development, and on special topics reporting progress made in the field of optoelectronics. All published papers will reflect the original thoughts of researchers and practitioners on basic theories, design and new technology in optoelectronics. Frontiers of Optoelectronics is strictly peer-reviewed and only accepts original submissions in English. It is a fully OA journal and the APCs are covered by Higher Education Press and Huazhong University of Science and Technology. ● Presents the latest developments in optoelectronics and optics ● Emphasizes the latest developments of new optoelectronic materials, devices, systems and applications ● Covers industrial photonics, information photonics, biomedical photonics, energy photonics, laser and terahertz technology, and more
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