TY - JOUR
T1 - Tailoring in Situ Healing and Stabilizing Post-Treatment Agent for High-Performance Inverted CsPbI3Perovskite Solar Cells with Efficiency of 16.67%
AU - Fu, Sheng
AU - Wan, Li
AU - Zhang, Wenxiao
AU - Li, Xiaodong
AU - Song, Weijie
AU - Fang, Junfeng
N1 - Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/10/9
Y1 - 2020/10/9
N2 - CsPbI3 perovskite solar cells (PSCs) have revealed promising applications for high-performance photovoltaic devices. Despite the high efficiency for regular CsPbI3 PSCs, poor stability for adverse dopants reflects the importance of the inverted. However, the inverted lag far for a phase transition and inferior CsPbI3 films. Here, we report an effective post-treatment agent, methylammonium pyridine-2-carboxylic (MAPyA), to heal and stabilize CsPbI3 films. MAPyA on CsPbI3 can decompose into methylamine (MA) gas and pyridine-2-carboxylate (PyA-) at 100 °C, and MA could remove pinholes, while PyA- gifts effective passivation. In addition, oriented PyA- hinders phase transition and isolates external erosions for long-term stability. The optimized devices show the highest efficiency among the inverted CsPbI3 PSCs of 16.67%. Besides, the phase stability and robustness against external erosions get considerable promotion. More importantly, unpackaged I-rich inorganic PSCs are rarely reported with long-term maximum power point in ambient condition, and our unencapsulated device still retains 81.31% of the initial efficiency after 1800 min of outdoor operation (relative humidity 30%).
AB - CsPbI3 perovskite solar cells (PSCs) have revealed promising applications for high-performance photovoltaic devices. Despite the high efficiency for regular CsPbI3 PSCs, poor stability for adverse dopants reflects the importance of the inverted. However, the inverted lag far for a phase transition and inferior CsPbI3 films. Here, we report an effective post-treatment agent, methylammonium pyridine-2-carboxylic (MAPyA), to heal and stabilize CsPbI3 films. MAPyA on CsPbI3 can decompose into methylamine (MA) gas and pyridine-2-carboxylate (PyA-) at 100 °C, and MA could remove pinholes, while PyA- gifts effective passivation. In addition, oriented PyA- hinders phase transition and isolates external erosions for long-term stability. The optimized devices show the highest efficiency among the inverted CsPbI3 PSCs of 16.67%. Besides, the phase stability and robustness against external erosions get considerable promotion. More importantly, unpackaged I-rich inorganic PSCs are rarely reported with long-term maximum power point in ambient condition, and our unencapsulated device still retains 81.31% of the initial efficiency after 1800 min of outdoor operation (relative humidity 30%).
UR - https://www.scopus.com/pages/publications/85094918503
U2 - 10.1021/acsenergylett.0c01728
DO - 10.1021/acsenergylett.0c01728
M3 - 文章
AN - SCOPUS:85094918503
SN - 2380-8195
VL - 5
SP - 3314
EP - 3321
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 10
ER -
