Improved Environmental Stability and Solar Cell Efficiency of (MA,FA)PbI3 Perovskite Using a Wide-Band-Gap 1D Thiazolium Lead Iodide Capping Layer Strategy

Citation:

Gao, L. ; Spanopoulos, I. ; Ke, W. ; Huang, S. ; Hadar, I. ; Chen, L. ; Li, X. ; Yang, G. ; Kanatzidis, M. G. . Improved Environmental Stability And Solar Cell Efficiency Of (Ma,Fa)Pbi3 Perovskite Using A Wide-Band-Gap 1D Thiazolium Lead Iodide Capping Layer Strategy. ACS ENERGY LETTERS 2019, 4, 1763-1769.

Date Published:

JUL

Abstract:

There is strong interest in improving the environmental stability of hybrid perovskite solar cells while maintaining high efficiency. Here, we solve this problem by using epilayers of a wide-band-gap 1D lead iodide perovskitoid structure, based on a short organic cation, namely, thiazole ammonium (TA) in the form of lead iodide (TAPbI3). The 1D capping layer serves to passivate three-dimensional (3D) perovskite films, which promotes charge transport, improves carrier lifetime, and prevents iodide ion migration of the 3D (MA,FA)PbI3 film (MA = methylammonium, FA = formamidinium). Furthermore, the corresponding device achieved considerable efficiency and better environmental stability than the -based analogue, delivering a champion PCE value of 18.97% while retaining 92% of this efficiency under ambient conditions in air for 2 months. These findings suggest that utilization of a 1D perovskitoid is an effective strategy to improve the environmental stability of 3D-based perovskite solar cell devices maintaining at the same time their high efficiency.

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Last updated on 12/02/2021