TY - JOUR
T1 - 2D metal–organic framework for stable perovskite solar cells with minimized lead leakage
AU - WU, Shengfan
AU - LI, Zhen
AU - LI, Mu Qing
AU - DIAO, Yingxue
AU - LIN, Francis
AU - LIU, Tiantian
AU - ZHANG, Jie
AU - TIEU, Peter
AU - GAO, Wenpei
AU - QI, Feng
AU - PAN, Xiaoqing
AU - XU, Zhengtao
AU - ZHU, Zonglong
AU - JEN, Alex K.Y.
N1 - Publisher Copyright:
© 2020, The Author(s), under exclusive licence to Springer Nature Limited.
PY - 2020/11/1
Y1 - 2020/11/1
N2 - Despite the notable progress in perovskite solar cells, maintaining long-term operational stability and minimizing potentially leaked lead (Pb2+) ions are two challenges that are yet to be resolved. Here we address these issues using a thiol-functionalized 2D conjugated metal–organic framework as an electron-extraction layer at the perovskite/cathode interface. The resultant devices exhibit high power conversion efficiency (22.02%) along with a substantially improved long-term operational stability. The perovskite solar cell modified with a metal–organic framework could retain more than 90% of its initial efficiency under accelerated testing conditions, that is continuous light irradiation at maximum power point tracking for 1,000 h at 85 °C. More importantly, the functionalized metal–organic framework could capture most of the Pb2+ leaked from the degraded perovskite solar cells by forming water-insoluble solids. Therefore, this method that simultaneously tackles the operational stability and lead contamination issues in perovskite solar cells could greatly improve the feasibility of large-scale deployment of perovskite photovoltaic technology.
AB - Despite the notable progress in perovskite solar cells, maintaining long-term operational stability and minimizing potentially leaked lead (Pb2+) ions are two challenges that are yet to be resolved. Here we address these issues using a thiol-functionalized 2D conjugated metal–organic framework as an electron-extraction layer at the perovskite/cathode interface. The resultant devices exhibit high power conversion efficiency (22.02%) along with a substantially improved long-term operational stability. The perovskite solar cell modified with a metal–organic framework could retain more than 90% of its initial efficiency under accelerated testing conditions, that is continuous light irradiation at maximum power point tracking for 1,000 h at 85 °C. More importantly, the functionalized metal–organic framework could capture most of the Pb2+ leaked from the degraded perovskite solar cells by forming water-insoluble solids. Therefore, this method that simultaneously tackles the operational stability and lead contamination issues in perovskite solar cells could greatly improve the feasibility of large-scale deployment of perovskite photovoltaic technology.
UR - http://www.scopus.com/inward/record.url?scp=85091177337&partnerID=8YFLogxK
U2 - 10.1038/s41565-020-0765-7
DO - 10.1038/s41565-020-0765-7
M3 - Journal Article (refereed)
C2 - 32958933
SN - 1748-3387
VL - 15
SP - 934
EP - 940
JO - Nature Nanotechnology
JF - Nature Nanotechnology
IS - 11
ER -
