In recent years,the development of wearable devices has a growing demand for flexible solar cells,Among them,improving the efficiency of the cells,enhancing the stability of device perfor-mance during bending and achieving self-repairing are important focuses of researchers,Perovskite materials have been found to be one of the new materials to improve the efficiency of flexible solar cells[1,2].At present,the problem to be solved is the degra-dation of device performance during bending,which due to defects of perovskite films on flexible substrate and grain boundaries cracks-triggered increased series resistance and carrier leakage[3,4].Some researcher reported the self-repairing of flexible per-ovskite solar cells(PSCs)by introduction of self-healing polymers[5].For example,the flexible PSCs using self-healing polyurethane(s-PU)as a scaffold in the perovskite crystallization process can recover more than 90％of the initial PCE,after 1000 times of 20％tensile cycles[6].However,these self-repairing processes usually require high temperature to achieve,which is very inconvenient for the application as wearable devices.Recently,Song's group[7]from the Institute of Chemistry,Chinese Academy of Sciences reported a new type of self-repairing PSC based on shape memory scaffold polyurethane(SMPU).Adding the SMPU brings three advantages to PSC:(1)the device efficiency is as high as 21.33％;(2)slow down the performance degradation during deformation;(3)the device can real-time self-repair at human body tempera-ture.These advantages provide great convenience and possibility for the application of PSC in wearable field.

Rongrong Bao;Caofeng Pan

CAS Center for Excellence in Nanoscience,Beijing Key Laboratory of Micro-nano Energy and Sensor,Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 100083,China;School of Nanoscience and Technology,University of Chinese Academy of Sciences,Beijing 100049,China

科学通报（英文版）

[1]Rongrong Bao;Caofeng Pan-.Efficient perovskite solar cells with body temperature self-repairing)[J].科学通报（英文版）,2022(22):2263-2264

Efficient,perovskite,solar,cells,body,temperature,self,repairing,recent,years,development,wearable,devices,has,growing,demand,flexible,Among,them,improving,efficiency,enhancing,stability,during,bending,achieving,are,important,focuses,researchers,Perovskite,materials,have,been,found,one,new,improve,At,present,problem,solved,performance,which,due,defects,films,substrate,grain,boundaries,cracks,triggered,increased,series,resistance,carrier,leakage,Some,reported,PSCs,by,introduction,healing,polymers,For,example,using,polyurethane,scaffold,crystallization,can,recover,more,initial,PCE,after,times,tensile,cycles,However,these,processes,usually,require,high,achieve,very,inconvenient,application,Recently,Song,group,from,Institute,Chemistry,Chinese,Academy,Sciences,type,shape,memory,SMPU,Adding,brings,three,advantages,slow,down,degradation,deformation,real,human,These,provide,great,convenience,possibility,field

0.529078