TY - JOUR
T1 - Managing Excess Lead Iodide with Functionalized Oxo-Graphene Nanosheets for Stable Perovskite Solar Cells
AU - Li, Guixiang
AU - Hu, Yalei
AU - Li, Meng
AU - Tang, Ying
AU - Zhang, Zuhong
AU - Musiienko, Artem
AU - Cao, Qing
AU - Akhundova, Fatima
AU - Li, Jinzhao
AU - Prashanthan, Karunanantharajah
AU - Yang, Fengjiu
AU - Janasik, Patryk
AU - Appiah, Augustine N.S.
AU - Trofimov, Sergei
AU - Livakas, Nikolaos
AU - Zuo, Shengnan
AU - Wu, Luyan
AU - Wang, Luyao
AU - Yang, Yuqian
AU - Agyei-Tuffour, Benjamin
AU - MacQueen, Rowan W.
AU - Naydenov, Boris
AU - Unold, Thomas
AU - Unger, Eva
AU - Aktas, Ece
AU - Eigler, Siegfried
AU - Abate, Antonio
N1 - Publisher Copyright:
© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.
PY - 2023/9/25
Y1 - 2023/9/25
N2 - Stability issues could prevent lead halide perovskite solar cells (PSCs) from commercialization despite it having a comparable power conversion efficiency (PCE) to silicon solar cells. Overcoming drawbacks affecting their long-term stability is gaining incremental importance. Excess lead iodide (PbI2) causes perovskite degradation, although it aids in crystal growth and defect passivation. Herein, we synthesized functionalized oxo-graphene nanosheets (Dec-oxoG NSs) to effectively manage the excess PbI2. Dec-oxoG NSs provide anchoring sites to bind the excess PbI2 and passivate perovskite grain boundaries, thereby reducing charge recombination loss and significantly boosting the extraction of free electrons. The inclusion of Dec-oxoG NSs leads to a PCE of 23.7 % in inverted (p-i-n) PSCs. The devices retain 93.8 % of their initial efficiency after 1,000 hours of tracking at maximum power points under continuous one-sun illumination and exhibit high stability under thermal and ambient conditions.
AB - Stability issues could prevent lead halide perovskite solar cells (PSCs) from commercialization despite it having a comparable power conversion efficiency (PCE) to silicon solar cells. Overcoming drawbacks affecting their long-term stability is gaining incremental importance. Excess lead iodide (PbI2) causes perovskite degradation, although it aids in crystal growth and defect passivation. Herein, we synthesized functionalized oxo-graphene nanosheets (Dec-oxoG NSs) to effectively manage the excess PbI2. Dec-oxoG NSs provide anchoring sites to bind the excess PbI2 and passivate perovskite grain boundaries, thereby reducing charge recombination loss and significantly boosting the extraction of free electrons. The inclusion of Dec-oxoG NSs leads to a PCE of 23.7 % in inverted (p-i-n) PSCs. The devices retain 93.8 % of their initial efficiency after 1,000 hours of tracking at maximum power points under continuous one-sun illumination and exhibit high stability under thermal and ambient conditions.
KW - Excess Lead Iodide
KW - Operational Stability
KW - Oxo-Graphene Nanosheets
KW - Perovskite Photovoltaics
KW - Solar Cells
UR - http://www.scopus.com/inward/record.url?scp=85168356183&partnerID=8YFLogxK
U2 - 10.1002/anie.202307395
DO - 10.1002/anie.202307395
M3 - Article
C2 - 37522562
AN - SCOPUS:85168356183
SN - 1433-7851
VL - 62
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 39
M1 - e202307395
ER -