TY - JOUR
T1 - Improved Environmental Stability and Solar Cell Efficiency of (MA,FA)PbI3 Perovskite Using a Wide-Band-Gap 1D Thiazolium Lead Iodide Capping Layer Strategy
AU - Gao, Lili
AU - Spanopoulos, Ioannis
AU - Ke, Weijun
AU - Huang, Sheng
AU - Hadar, Ido
AU - Chen, Lin
AU - Li, Xiaolei
AU - Yang, Guanjun
AU - Kanatzidis, Mercouri G.
N1 - Funding Information:
The work was supported by the National Program for Support of Top-notch Young Professionals. The work at Northwestern University was supported by the ONR (N00014-17-1-2231), and PYSA measurements were carried out with equipment acquired by ONR Grant N00014-18-1-2102. The authors thank the Instrument Analysis Center of Xi’an Jiaotong University for the XPS, UV–vis, PL, and TRPL testing. L.L.G. gratefully acknowledges financial support from the Joint Educational Ph.D. Program of Chinese Scholarship Council (CSC).
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/6/26
Y1 - 2019/6/26
N2 - 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.
AB - 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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U2 - 10.1021/acsenergylett.9b00930
DO - 10.1021/acsenergylett.9b00930
M3 - Article
AN - SCOPUS:85073640076
SN - 2380-8195
VL - 4
SP - 1763
EP - 1769
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 7
ER -
