TY - JOUR
T1 - Strong-bonding hole-transport layers reduce ultraviolet degradation of perovskite solar cells
AU - Fei, Chengbin
AU - Kuvayskaya, Anastasia
AU - Shi, Xiaoqiang
AU - Wang, Mengru
AU - Shi, Zhifang
AU - Jiao, Haoyang
AU - Silverman, Timothy J.
AU - Owen-Bellini, Michael
AU - Dong, Yifan
AU - Xian, Yeming
AU - Scheidt, Rebecca
AU - Wang, Xiaoming
AU - Yang, Guang
AU - Gu, Hangyu
AU - Li, Nengxu
AU - Dolan, Connor J.
AU - Deng, Zhewen J.D.
AU - Cakan, Deniz N.
AU - Fenning, David P.
AU - Yan, Yanfa
AU - Beard, Matthew C.
AU - Schelhas, Laura T.
AU - Sellinger, Alan
AU - Huang, Jinsong
PY - 2024/6/7
Y1 - 2024/6/7
N2 - The light-emitting diodes (LEDs) used in indoor testing of perovskite solar cells do not expose them to the levels of ultraviolet (UV) radiation that they would receive in actual outdoor use. We report degradation mechanisms of p-i-n-structured perovskite solar cells under unfiltered sunlight and with LEDs. Weak chemical bonding between perovskites and polymer hole-transporting materials (HTMs) and transparent conducting oxides (TCOs) dominate the accelerated A-site cation migration, rather than direct degradation of HTMs. An aromatic phosphonic acid, [2-(9-ethyl-9H-carbazol-3-yl)ethyl]phosphonic acid (EtCz3EPA), enhanced bonding at the perovskite/HTM/TCO region with a phosphonic acid group bonded to TCOs and a nitrogen group interacting with lead in perovskites. A hybrid HTM of EtCz3EPA with strong hole-extraction polymers retained high efficiency and improved the UV stability of perovskite devices, and a champion perovskite minimodule-independently measured by the Perovskite PV Accelerator for Commercializing Technologies (PACT) center-retained operational efficiency of >16% after 29 weeks of outdoor testing.
AB - The light-emitting diodes (LEDs) used in indoor testing of perovskite solar cells do not expose them to the levels of ultraviolet (UV) radiation that they would receive in actual outdoor use. We report degradation mechanisms of p-i-n-structured perovskite solar cells under unfiltered sunlight and with LEDs. Weak chemical bonding between perovskites and polymer hole-transporting materials (HTMs) and transparent conducting oxides (TCOs) dominate the accelerated A-site cation migration, rather than direct degradation of HTMs. An aromatic phosphonic acid, [2-(9-ethyl-9H-carbazol-3-yl)ethyl]phosphonic acid (EtCz3EPA), enhanced bonding at the perovskite/HTM/TCO region with a phosphonic acid group bonded to TCOs and a nitrogen group interacting with lead in perovskites. A hybrid HTM of EtCz3EPA with strong hole-extraction polymers retained high efficiency and improved the UV stability of perovskite devices, and a champion perovskite minimodule-independently measured by the Perovskite PV Accelerator for Commercializing Technologies (PACT) center-retained operational efficiency of >16% after 29 weeks of outdoor testing.
UR - http://www.scopus.com/inward/record.url?scp=85195439073&partnerID=8YFLogxK
U2 - 10.1126/science.adi4531
DO - 10.1126/science.adi4531
M3 - Journal article
C2 - 38843338
AN - SCOPUS:85195439073
SN - 0036-8075
VL - 384
SP - 1126
EP - 1134
JO - Science (New York, N.Y.)
JF - Science (New York, N.Y.)
IS - 6700
ER -