Статья

Multidentate Chelation Heals Structural Imperfections for Minimized Recombination Loss in Lead‐Free Perovskite Solar Cells

Gengling LiuKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 ChinaYang ZhongInstitute of Polymers and Energy Chemistry (IPEC) Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaWenhuai FengKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 ChinaMeifang YangKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 ChinaGuo YangKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 ChinaJun‐Xing ZhongKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 ChinaTian TianKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 ChinaJianbin LuoKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 ChinaJunlei TaoProvince-Ministry Co-construction Collaborative Innovation Center of Hebei Photovoltaic Technology College of Physics Science and Technology Hebei University Baoding 071002 ChinaShaopeng YangProvince-Ministry Co-construction Collaborative Innovation Center of Hebei Photovoltaic Technology College of Physics Science and Technology Hebei University Baoding 071002 ChinaXudong WangKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 ChinaLicheng TanInstitute of Polymers and Energy Chemistry (IPEC) Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaYiwang ChenInstitute of Polymers and Energy Chemistry (IPEC) Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaWu‐Qiang WuKey Laboratory of Bioinorganic and Synthetic Chemistry (MoE) Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou 510006 China

2022en

ABI

Аннотация

Tin-based perovskite solar cells (Sn-PSCs) have emerged as promising environmentally viable photovoltaic technologies, but still suffer from severe non-radiative recombination loss due to the presence of abundant deep-level defects in the perovskite film and under-optimized carrier dynamics throughout the device. Herein, we healed the structural imperfections of Sn perovskites in an "inside-out" manner by incorporating a new class of biocompatible chelating agent with multidentate claws, namely, 2-Guanidinoacetic acid (GAA), which passivated a variety of deep-level Sn-related and I-related defects, cooperatively reinforced the passivation efficacy, released the lattice strain, improved the structural toughness, and promoted the carrier transport of Sn perovskites. Encouragingly, an efficiency of 13.7 % with a small voltage deficit of ≈0.47 V has been achieved for the GAA-modified Sn-PSCs. GAA modification also extended the lifespan of Sn-PSCs over 1200 hours.

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Идентификаторы

DOI: 10.1002/anie.202209464

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar