Rigid molecules anchoring on NiOx enable >26% efficiency perovskite solar cells

IF 38.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL Joule Pub Date : 2025-01-24 DOI:10.1016/j.joule.2024.101815

Deng Wang, Zhixin Liu, Ying Qiao, Zhengyan Jiang, Peide Zhu, Jie Zeng, Wenbo Peng, Qing Lian, Geping Qu, Yintai Xu, Yong Zhang, Fengzhu Li, Lei Yan, Xingzhu Wang, Yang-Gang Wang, Alex K.-Y. Jen, Baomin Xu

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Abstract

The surface defects of nickel oxide (NiO_x) 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 NiO_x by forming tetradentate binding and parallel orientation. Dense and uniform coverage of FY-CPA at the NiO_x/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.

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来源期刊

Joule Energy-General Energy

CiteScore

53.10

自引率

2.00%

发文量

198

期刊介绍： Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.