TY - JOUR
T1 - Rigid molecules anchoring on NiOx enable >26% efficiency perovskite solar cells
AU - Wang, Deng
AU - Liu, Zhixin
AU - Qiao, Ying
AU - Jiang, Zhengyan
AU - Zhu, Peide
AU - Zeng, Jie
AU - Peng, Wenbo
AU - Lian, Qing
AU - Qu, Geping
AU - Xu, Yintai
AU - Zhang, Yong
AU - Li, Fengzhu
AU - Yan, Lei
AU - Wang, Xingzhu
AU - Wang, Yang-Gang
AU - Jen, Alex K.-Y.
AU - Xu, Baomin
PY - 2025/3/19
Y1 - 2025/3/19
N2 - The surface defects of nickel oxide (NiOx) and its interfacial redox reactions with perovskites often impede the efficiency improvement of inverted perovskite solar cells (PSCs). To address these issues, we designed ((9H-fluoren-9-ylidene)methyl) cyanophosphonic acid (FY-CPA) with a rigid backbone as an optimal multi-dentate anchoring (MDA) molecule to enhance the anchorage with bottom NiOx by forming tetradentate binding and parallel orientation. Dense and uniform coverage of FY-CPA at the NiOx/perovskite interface was achieved through in situ deposition, which can minimize interfacial redox reactions and suppress non-radiative recombination. The champion device demonstrated a power conversion efficiency (PCE) of 26.21% with a certified value of 25.99%. In addition, the larger area device (1.02 cm2) also showed a PCE of 25.31% with a certified value of 24.90%, which is among the highest PCEs reported so far for greater than 1 cm2 sized PSCs. Moreover, the as-prepared device exhibited enhanced thermal and operational stability during long-term storage. © 2024 Elsevier Inc.
AB - The surface defects of nickel oxide (NiOx) and its interfacial redox reactions with perovskites often impede the efficiency improvement of inverted perovskite solar cells (PSCs). To address these issues, we designed ((9H-fluoren-9-ylidene)methyl) cyanophosphonic acid (FY-CPA) with a rigid backbone as an optimal multi-dentate anchoring (MDA) molecule to enhance the anchorage with bottom NiOx by forming tetradentate binding and parallel orientation. Dense and uniform coverage of FY-CPA at the NiOx/perovskite interface was achieved through in situ deposition, which can minimize interfacial redox reactions and suppress non-radiative recombination. The champion device demonstrated a power conversion efficiency (PCE) of 26.21% with a certified value of 25.99%. In addition, the larger area device (1.02 cm2) also showed a PCE of 25.31% with a certified value of 24.90%, which is among the highest PCEs reported so far for greater than 1 cm2 sized PSCs. Moreover, the as-prepared device exhibited enhanced thermal and operational stability during long-term storage. © 2024 Elsevier Inc.
KW - buried recombination loss
KW - inverted perovskite solar cells
KW - multi-dentate anchoring
KW - nickel oxide
KW - rigid molecules
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85217227316&origin=recordpage
U2 - 10.1016/j.joule.2024.101815
DO - 10.1016/j.joule.2024.101815
M3 - RGC 21 - Publication in refereed journal
SN - 2542-4351
VL - 9
JO - Joule
JF - Joule
IS - 3
M1 - 101815
ER -
