journal article·2024-09Open access

Suppressed Defects by Functional Thermally Cross‐Linked Fullerene for High‐Efficiency Tin‐Lead Perovskite Solar Cells

Jinbo Zhao, Zhenhuang Su, Jorge Pascual, Hongzhuo Wu, Haibin Wang, Mahmoud H. Aldamasy, Zhengji Zhou, Chenyue Wang, Guixiang Li, Zhe Li, Xingyu Gao, Chain‐Shu Hsu, Meng Li

Advanced Materials· Volume 36· Issue 36

Abstract

Abstract Mixed tin‐lead (Sn‐Pb) perovskites have attracted the attention of the community due to their narrow bandgap, ideal for photovoltaic applications, especially tandem solar cells. However, the oxidation and rapid crystallization of Sn2+ and the interfacial traps hinder their development. Here, cross‐linkable [6,6]‐phenyl‐C61‐butyric styryl dendron ester (C‐PCBSD) is introduced during the quenching step of perovskite thin film processing to suppress the generation of surface defects at the electron transport layer interface and improve the bulk crystallinity. The C‐PCBSD has strong coordination ability with Sn2+ and Pb2+ perovskite precursors, which retards the crystallization process, suppresses the oxidation of Sn2+, and improves the perovskite bulk and surface crystallinity, yielding films with reduced nonradiative recombination and enhanced interface charge extraction. Besides, the C‐PCBSD network deposited on the perovskite surface displays superior hydrophobicity and oxygen resistance. Consequently, the devices with C‐PCBSD obtain PCEs of up to 23.4% and retained 97% of initial efficiency after 2000 h of storage in a N2 atmosphere.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

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

Affiliations

Key Lab for Special Functional Materials of Ministry of Education National & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering and Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng 475004 P. R. China

Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Advanced Research Institute Chinese Academy of Sciences 239 Zhangheng Road Shanghai 201204 P. R. China

POLYMAT University of the Basque Country UPV/EHU Donostia‐San Sebastián 20018 Spain

Institute of Advanced Ceramics, Henan Academy of Sciences Zhengzhou 450046 China

Helmholtz‐Zentrum Berlin für Materialien und Energie GmbH Hahn‐Meitner‐Platz 1 14109 Berlin Germany

School of Engineering and Materials Science (SEMS) Queen Mary University of London London E1 4NS UK

Department of Applied Chemistry and Center for Emergent Functional Matter Science National Yang Ming Chiao Tung University Hsinchu 300093 Taiwan

Funding

AXA Research Fund · China Postdoctoral Science Foundation · National Natural Science Foundation of China

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