Synergistic Toughening and Self-Healing Strategy for Highly Efficient and Stable Flexible Perovskite Solar Cells

Jia Yang; Wangping Sheng; Xiang LiYang ZhongYang SuLicheng TanYiwang Chen

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Synergistic Toughening and Self-Healing Strategy for Highly Efficient and Stable Flexible Perovskite Solar Cells

机译：Synergistic Toughening and Self-Healing Strategy for Highly Efficient and Stable Flexible Perovskite Solar Cells

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Halide perovskites are qualified to meet the flexibility demands of optoelectronicfield because of their merits of flexibility, lightness, and low cost.However, the intrinsic defects and deformation-induced ductile fracture inboth perovskite and buried interface significantly restrict the photoelectricperformance and longevity of flexible perovskite solar cells (PVSCs). Here,a dual-dynamic cross-linking network is schemed to boost the photovoltaicefficiency and mechanical stability of flexible PVSCs by incorporating naturalpolymerizable small molecule α-lipoic acid (LA). The LA therein can be autonomouslyring-opening polymerized through dynamic disulfide bonds andhydrogen bonds, concurrently forming coordination bonds to interact withperovskite component. Importantly, the polymerization product can serveas efficacious passivating and toughening agents to simultaneously optimizeinterfacial contact, enhance perovskite crystallinity and sustain robustmechanical bendability. Subsequently, the rigid (or flexible) p-i-n device realizesa champion efficiency of 22.43% (or 19.03%) with prominent operationalstability. Moreover, the dual-dynamic cross-linking network endows PVSCswith bendability and self-healing capacity, allowing the optimized devices toretain >80% efficiency after 3000 bending cycles, and subsequently restore to≈95% of its initial efficiency under mild heat-treatment. This toughening andself-healing strategy provides a facile and efficient path to prolong operationallifetime of flexible device.

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来源
《Advanced functional materials》 |2023年第23期|2214984.1-2214984.11|共11页
作者
Jia Yang; Wangping Sheng; Xiang LiYang ZhongYang SuLicheng TanYiwang Chen;
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作者单位

National Engineering Research Center for Carbohydrate Synthesis/KeyLab of Fluorine and Silicon for Energy Materials and Chemistry ofMinistry of EducationJiangxi Normal University99 Ziyang Avenue, Nanchang 330022, China College of Chemistry and Chemical En;

College of Chemistry and Chemical Engineering/Institute of Polymersand Energy Chemistry (IPEC)Nanchang University999 Xuefu Avenue, Nanchang 330031, China;

College of Chemistry and Chemical Engineering/Institute of Polymersand Energy Chemistry (IPEC)Nanchang University999 Xuefu Avenue, Nanchang 330031, China Peking University Yangtze Delta Institute of OptoelectronicsNantong 226010, China;

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dynamic chemical bonds; flexible devices; perovskite solar cells; selfhealing; toughening;

Synergistic Toughening and Self-Healing Strategy for Highly Efficient and Stable Flexible Perovskite Solar Cells

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