TY - JOUR
T1 - Surface Re-Engineering of Perovskites with Buckybowls to Boost the Inverted-Type Photovoltaics
AU - Xing, Zhou
AU - An, Ming-Wei
AU - Chen, Zuo-Chang
AU - Hu, Mingyu
AU - Huang, Xianzhen
AU - Deng, Lin-Long
AU - Zhang, Qianyan
AU - Guo, Xugang
AU - Xie, Su-Yuan
AU - Yang, Shihe
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (U2001217, 21972006, 21721001, 92061122, and 92061204), the Shenzhen Peacock Plan (KQTD2016053015544057), the Shenzhen-Hong Kong Innovation Circle United Research Project (SGLH20180622092406130), and the China Postdoctoral Science Foundation (2020M680197). The authors would also like to thank Dr. Shu-Hui Li from Guangxi Normal University and Dr. Zhibin Wang from Fujian Normal University for their kind assistance with characterizations in addition to discussions.
Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/8/3
Y1 - 2022/8/3
N2 - Despite their multifaceted advantages, inverted perovskite solar cells (PSCs) still suffer from lower power conversion efficiencies (PCEs) than their regular counterparts, which is largely due to recombination energy losses (Eloss) that arise from the chemical, physical, and energy level mismatches, especially at the interfaces between perovskites and fullerene electron transport layers (ETLs). To address this problem, we herein introduce an aminium iodide derivative of a buckybowl (aminocorannulene) that is molecularly layered at the perovskite-ETL interface. Strikingly, besides passivating the PbI2-rich perovskite surface, the aminocorannulene enforces a vertical dipole and enhances the surface n-type character that is more compatible with the ETL, thus boosting the electron extraction and transport dynamics and suppressing interfacial Eloss. As a result, the champion PSC achieves an excellent PCE of over 22%, which is superior compared to that of the control device (∼20%). Furthermore, the device stability is significantly enhanced, owing to a lock-and-key-like grip on the mobile iodides by the buckybowls and the resultant increase of the interfacial ion-migration barrier. This work highlights the potential of buckybowls for the multifunctional surface engineering of perovskite toward high-performance and stable PSCs.
AB - Despite their multifaceted advantages, inverted perovskite solar cells (PSCs) still suffer from lower power conversion efficiencies (PCEs) than their regular counterparts, which is largely due to recombination energy losses (Eloss) that arise from the chemical, physical, and energy level mismatches, especially at the interfaces between perovskites and fullerene electron transport layers (ETLs). To address this problem, we herein introduce an aminium iodide derivative of a buckybowl (aminocorannulene) that is molecularly layered at the perovskite-ETL interface. Strikingly, besides passivating the PbI2-rich perovskite surface, the aminocorannulene enforces a vertical dipole and enhances the surface n-type character that is more compatible with the ETL, thus boosting the electron extraction and transport dynamics and suppressing interfacial Eloss. As a result, the champion PSC achieves an excellent PCE of over 22%, which is superior compared to that of the control device (∼20%). Furthermore, the device stability is significantly enhanced, owing to a lock-and-key-like grip on the mobile iodides by the buckybowls and the resultant increase of the interfacial ion-migration barrier. This work highlights the potential of buckybowls for the multifunctional surface engineering of perovskite toward high-performance and stable PSCs.
UR - http://www.scopus.com/inward/record.url?scp=85135597260&partnerID=8YFLogxK
U2 - 10.1021/jacs.2c05235
DO - 10.1021/jacs.2c05235
M3 - Journal article
C2 - 35862295
AN - SCOPUS:85135597260
SN - 0002-7863
VL - 144
SP - 13839
EP - 13850
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 30
ER -
