Effects of A site doping on the crystallization of perovskite films

Perovskite materials with ABX 3 chemical formula have a high absorption coefficient, high mobility and low exciton binding energies, and thus are promising candidates for the next generation of photovoltaic devices. Doping various cations on the A site has been reported to be beneficial for improvin...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 9; no. 3; pp. 1372 - 1394
Main Authors Zhang, Caiyi, Wang, Yanbo, Lin, Xuesong, Wu, Tianhao, Han, Qifeng, Zhang, Yiqiang, Han, Liyuan
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 26.01.2021
Subjects
absorbance
Absorptivity
Cations
Crystal structure
Crystallization
Doping
Excitons
Learning algorithms
Machine learning
Morphology
Nucleation
Perovskites
Phase transitions
Photovoltaic cells
Photovoltaics
Solar cells
Stability
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Summary:Perovskite materials with ABX 3 chemical formula have a high absorption coefficient, high mobility and low exciton binding energies, and thus are promising candidates for the next generation of photovoltaic devices. Doping various cations on the A site has been reported to be beneficial for improving the performance and stability of perovskite solar cells. However, the mixed cation compositions make the perovskite crystallization mechanism complicated. To better manipulate perovskite crystallization, it is essential to understand the effects of A site doping on the perovskite crystallization. Four influences of A site doping on the crystallization of perovskite films are reviewed in this paper: (1) the influences on the morphology and crystallinity of the PbI 2 layer; (2) nucleation and growth; (3) phase transition; (4) crystal orientation. At the end, we suggest that the influence of A site doping on the performance and stability of perovskite solar cells should be further studied with the help of advanced in situ characterization methods, theoretical computation and machine learning. The effects of A site doping on the crystallization, including the morphology and crystallinity of the PbI 2 layer, nucleation and growth, phase transition and crystal orientation.
Bibliography:the optimization of perovskite crystallization and interface engineering.
Caiyi Zhang obtained his B.S. degree from Wuhan University of Technology in 2018, and then continued his study as a PhD student at Shanghai Jiao Tong University. His current research is focused on the fabrication of efficient and stable inverted perovskite solar cells
Liyuan Han is the chair professor of Shanghai Jiao Tong University. He received his PhD degree from the University of Osaka Prefecture in 1988, and then worked at SHARP Corporation and started research on solar cells. Afterwards, he joined the National Institute for Materials Science, and established a research center of next-generation solar cells. His current research interests involve fundamental research on perovskite solar cells and the fabrication of high-performance perovskite solar modules for commercialization.
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Qifeng Han received his PhD degree from the Institute of Solid State of Physics, Chinese Academy of Sciences in 2008. He is now an associate professor of Shanghai Jiao Tong University. His current research interests involve novel next-generation solar cells and solar cell materials design and fabrication, including perovskite solar cells, perovskite/chalcogenide tandem solar cells and perovskite single crystals.
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ISSN:2050-7488
2050-7496
2050-7496
DOI:10.1039/d0ta08656h