Defect passivation and electrical conductivity enhancement in perovskite solar cells using functionalized graphene quantum dots

作     者：Yichuan Rui Zuoming Jin Xinyi Fan Weitao Li Bin Li Tianpeng Li Yuanqiang Wang Liang Wang Jia Liang 

作者机构：College of Chemistry and Chemical EngineeringShanghai University of Engineering ScienceShanghai 201620People’s Republic of China Institute of Nanochemistry and NanobiologySchool of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444People’s Republic of China Department of Materials ScienceFudan University220 Handan RoadShanghai 200433People’s Republic of China 

出 版 物：《Materials Futures》 (材料展望（英文）)

年 卷 期：2022年第1卷第4期

页      面：121-132页

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.52202178,21901154,and 52102219) the Natural Science Foundation of Shanghai(Nos.22ZR1426300 and 21ZR1404900) the Shanghai Sailing Program(No.19YF1417600) the Shanghai Pujiang Project(No.21PJ1400900).The authors declare no competing financial interest 

主　　题：perovskite solar cells graphene quantum dots defect passivation 

摘      要：Organic–inorganic halide perovskites have been intensively investigated as potential photovoltaic materials due to their exceptional optoelectronic properties and their successful applications in perovskite solar cells(PSCs).However,a large number of defect states still exist in the PSCs so far and are detrimental to their power conversion efficiencies(PCEs)and ***,an effective strategy of incorporating single-crystalline graphene quantum dots(GQDs)into the perovskite films is proposed to passivate the defect ***,the GQD-modified perovskite films exhibit purer phase structure,higher quality of morphology,and higher electrical conductivity when compared with the control perovskite *** of the advantages caused by the incorporation of the GQDs lead to fast carrier separation and transport,long carrier lifetime,and low nonradiative recombination in the PSCs based on the GQD-modified perovskite *** a result,this kind of PSC displays an increase in all photovoltaic parameters,and its PCE shows an enhancement of more than 20%when compared with the control ***,this novel PSC is demonstrated to have long-term stability and resistibility against heat and *** findings provide an insight into how to passivate the defect states and enhance the electrical conductivities in the perovskites and pave the way for their further exploration to achieve higher photovoltaic performances.