journal article·2024-05

Stabilizing Top Interface by Molecular Locking Strategy with Polydentate Chelating Biomaterials toward Efficient and Stable Perovskite Solar Cells in Ambient Air

Baibai Liu, Xiaodong Ren, Ru Li, Yu Chen, Dongmei He, Yong Li, Qian Zhou, Danqing Ma, Xiao Han, Xuxia Shai, Ke Yang, Shirong Lu, Zhengfu Zhang, Jing Feng, Cong Chen, Jianhong Yi, Jiangzhao Chen

Advanced Materials· Volume 36· Issue 19
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Abstract

Abstract The instability of top interface induced by interfacial defects and residual tensile strain hinders the realization of long‐term stable n–i–p regular perovskite solar cells (PSCs). Herein, one molecular locking strategy is reported to stabilize top interface by adopting polydentate ligand green biomaterial 2‐deoxy‐2,2‐difluoro‐d‐erythro‐pentafuranous‐1‐ulose‐3,5‐dibenzoate (DDPUD) to manipulate the surface and grain boundaries of perovskite films. Both experimental and theoretical evidence collectively uncover that the uncoordinated Pb2+ ions, halide vacancy, and/or I─Pb antisite defects can be effectively healed and locked by firm chemical anchoring on the surface of perovskite films. The ingenious polydentate ligand chelating is translated into reduced interfacial defects, increased carrier lifetimes, released interfacial stress, and enhanced moisture resistance, which should be liable for strengthened top interface stability and inhibited interfacial nonradiative recombination. The universality of the molecular locking strategy is certified by employing different perovskite compositions. The DDPUD modification achieves an enhanced power conversion efficiency (PCE) of 23.17–24.47%, which is one of the highest PCEs ever reported for the devices prepared in ambient air. The unsealed DDPUD‐modified devices maintain 98.18% and 88.10% of their initial PCEs after more than 3000 h under a relative humidity of 10–20% and after 1728 h at 65 °C, respectively.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education) College of Optoelectronic Engineering Chongqing University Chongqing 400044 China

Yunnan Key Laboratory for Micro/Nano Materials & Technology International Joint Research Center for Optoelectronic and Energy Materials School of Materials and Energy Yunnan University Kunming 650091 China

Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China

Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China

Institute of Physical and Engineering Science/Faculty of Science Kunming University of Science and Technology Kunming 650500 China

Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China

Department of Material Science and Technology Taizhou University Taizhou 318000 China

State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Materials Science and Engineering Hebei University of Technology Tianjin 300401 China

Funding

National Natural Science Foundation of China

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