Flexible perovskite photodetector with room-temperatureself-healing capability without external trigger  

作　　者：Guoyi Li Shenghong Li Jahangeer Ahmed Wei Tian Liang Li 

机构地区：[1]School of Physical Science and Technology,Jiangsu Key Laboratory of Frontier Material Physics and Devices,Center for Energy Conversion Materials&Physics(CECMP),Soochow University,Suzhou,the People's Republic of China [2]Department of Chemistry,College of Science,King Saud University,Riyadh,Saudi Arabia

出　　处：《InfoMat》2024年第11期120-131,共12页信息材料（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:52025028,52072254,U23A20571;Key University Science Research Project of Jiangsu Province,Grant/Award Number:21KJA430005;King Saud University,Grant/Award Number:RSP2024R391。

摘　　要：Flexible perovskite photodetectors(FPDs)are promising for novel wearabledevices in bionics,robotics and health care.However,their performance degradationand instability during operations remain a grand challenge.Superiorflexibility and spontaneous functional repair of devices without the need forany external drive or intervention are ideal goals for FPDs.Herein,by usingphenyl disulfide instead of alkyl disulfide as a crosslinking agent,disulfidebonds with lower bond energy are introduced,thus endowing the polyurethanenetwork(SCPU)with the ability of self-healing at room temperature.SCPU is filled to the grain boundary of perovskite film,which not onlyimproves the crystal quality of perovskite and mechanical stability of FPD butalso enables FPD to self-heal at room temperature.As a result,the as-preparedFPD exhibits a superior responsivity of 0.4 A W^(-1),a high specific detectivity of 2.5×10^(11)Jones and 2μs fast response time in a self-powered mode.Moreimportantly,the FPD still retained 91%of the initial photo responsivity after9000 times of bending upon cyclic healing.This polymer doping strategy providesan effective solution for stable operation and room-temperature selfhealingfor FPDs.

关 键 词：PEROVSKITE phenyl disulfide bond PHOTODETECTOR SELF-HEALING 

分 类 号：TN15[电子电信—物理电子学]