A shape memory scaffold for body temperature self-repairing wearable perovskite solar cells with efficiency exceeding 21%  

作　　者：Tangyue Xue Zengqi Huang Pei Zhang Meng Su Xiaotian Hu Tingqing Wu Baojin Fan Gangshu Chen Guanghui Yu Wentao Liu Xuying Liu Yiqiang Zhang Yanlin Song 

机构地区：[1]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou,People's Republic of China [2]Key Laboratory of Green Printing,Institute of Chemistry Chinese Academy of Sciences(ICCAS),Beijing,People's Republic of China [3]Institute of Polymers and Energy Chemistry,Nanchang University,Nanchang,People's Republic of China [4]College of Chemistry,Zhengzhou University,Zhengzhou,People's Republic of China

出　　处：《InfoMat》2022年第12期74-84,共11页信息材料（英文）

基　　金：National Key R&D Program of China,Grant/Award Number:2018YFA0208501;National Natural Science Foundation of China,Grant/Award Numbers:21401167,22005131,22075296,51803217,5210031012,52173169,91963212;Beijing Nova Program from Beijing Municipal Science;Technology Commission,Grant/Award Number:Z201100006820037;Beijing National Laboratory for Molecular Sciences,Grant/Award Number:BNLMSCXXM-202005;Youth Innovation Promotion Association CAS,Grant/Award Number:2020032;Key R&D and Promotion Project of Henan Province,Grant/Award Number:192102210032;Outstanding Young Talent Research Fund of Zhengzhou University。

摘　　要：Grain boundary cracks in flexible perovskite films can be repaired by filling with self-repairing polymers during the preparation and wearable operation.However,the self-repairing polymers are commonly active through external heating or humidification treatments,which cannot match with the human body's temperature tolerance of wearable devices.Herein,a body temperature-responsive shape memory polyurethane(SMPU)is demonstrated to achieve the real-time mechanical self-repairing of grain boundary cracks(~37°C).Furthermore,the strong intermolecular interaction between SMPU and the uncoordinated Pb2+and I−,can reduce the trap density in perovskite films.The blade-coated device achieves a power conversion efficiency(PCE)of 21.33%,which is among the best reported flexible perovskite solar cells(PSCs;0.10 cm2).Importantly,the device with SMPU can recover more than 80%of the PCE after 6000 cycles(bending radius:8 mm).Finally,the flexible PSCs are used for wearable solar power supply of a smartphone,which show great potential for self-repairing wearable electronics.

关 键 词：grain boundary mechanical stability PEROVSKITE self-repairing function shape memory polyurethane 

分 类 号：TM914.4[电气工程—电力电子与电力传动]