Heterogeneous supersaturation in mixed perovskites
Date
2020
Authors
Tan, Chih Shan
Hou, Yi
Saidaminov, Makhsud I.
Proppe, Andrew
Huang, Yu Sheng
Zhao, Yicheng
Wei, Mingyang
Walters, Grant
Wang, Ziyun
Zhao, Yongbiao
Journal Title
Journal ISSN
Volume Title
Publisher
Advanced Science
Abstract
Thin‐film solar cells based on hybrid lead halide perovskites have achieved certified power conversion efficiencies exceeding 24%, approaching those of crystalline silicon. This motivates deeper studies of the mechanisms that determine their performance. Twin defect sites have been proposed as a source of traps in perovskites, yet their origin and influence on photovoltaic performance remain unclear. It is found that twin defects—observed herein via both transmission electron microscopy and X‐ray diffraction—are correlated with the amount of antisolvent added to the perovskite and that twin defects in the highest‐performing perovskite photovoltaics are suppressed. Heterogeneous supersaturation nucleation is discussed as a contributor to efficient perovskite‐based optoelectronic devices.
Description
Keywords
defects, perovskites, traps, twins
Citation
Tan, C. T., Hou, Y., Saidaminov, M. I., Proppe, A., Huang, Y. S., Zhao, Y., Wei, M., Walters, G., Wang, Z., Zhao, Y., Todorovic, P., Kelley, S. O., Chen, L. J., & Sargent, E. H. (2020). Heterogeneous Supersaturation in Mixed Perovskites. Advanced Science, 7(7), 1-6. https://doi.org/10.1002/advs.201903166.