All-inorganic CsPbI2Br perovskite solar cells(PSCs)have received extensive research interests recently.Nevertheless,their low efficiency and poor long-term stability are still obstacles for further commercial application.Herein,we demonstrate that high efficiency and exceptional long-term stability are realized by incorporating gadolinium(Ⅲ)chloride(GdCl3)into the CsPbI2Br perovskite film.The incorporation of GdCl3 enhances the Goldschmidt tolerance factor of CsPbI2Br perovskite,yielding a dense perovskite film with small grains,thus the α-phase CsPbI2Br is remarkably stabilized.Additionally,it is found that the GdCl3-incorporated perovskite film achieves suppressed charge recombination and appropriate energy level alignment compared with the pristine CsPbI2Br film.The noticeable increment in efficiency from 14.01％(control PSC)to 16.24％is achieved for GdCl3-incorporated PSC.Moreover,the nonencapsulated GdCl3-incorporated PSC exhibits excellent environmental and thermal stability,remaining over 91％or 90％of the original efficiency after 1200 h aging at 40％relative humidity or 480 h heating at 85℃in nitrogen glove box respectively.The encapsulated GdCl3-incorporated PSC presents an improved opera-tional stability with over 88％of initial efficiency under maximum power point(MPP)tracking at 45℃for 1000 h.This work presents an effective ion-incorporation approach for boosting efficiency and long-term stability of all-inorganic PSCs.

Xingyu Pu;Jiabao Yang;Tong Wang;Shuaici Cheng;Qi Cao;Junsong Zhao;Hui Chen;Yixin Zhang;Tingting Xu;Ilhom Tojiboyev;Hadi Salari;Xuanhua Li

State Key Laboratory of Solidification Processing,Center for Nano Energy Materials,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China;Queen Mary University of London Engineering School,Northwestern Polytechnical University,Xi'an 710129,Shaanxi,China;School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an 710129,Shaanxi,China;Institute Ion-Plasma and Laser Technologies,Uzbekistan Academy of Sciences,100125,Durmon yuli 33,Tashkent,Uzbekistan;Faculty of Physical Chemistry,Shiraz University,Shiraz 71345,Iran

能源化学

[1]Xingyu Pu;Jiabao Yang;Tong Wang;Shuaici Cheng;Qi Cao;Junsong Zhao;Hui Chen;Yixin Zhang;Tingting Xu;Ilhom Tojiboyev;Hadi Salari;Xuanhua Li-.Gadolinium-incorporated CsPbI2Br for boosting efficiency and long-term stability of all-inorganic perovskite solar cells)[J].能源化学,2022(07):9-17

Goldschmidt,nonencapsulated

Gadolinium,incorporated,CsPbI2Br,boosting,efficiency,long,term,stability,inorganic,perovskite,solar,cells,All,PSCs,have,received,extensive,research,interests,recently,Nevertheless,their,low,poor,still,obstacles,further,commercial,application,Herein,demonstrate,that,high,exceptional,realized,by,incorporating,gadolinium,chloride,GdCl3,into,film,incorporation,enhances,tolerance,yielding,dense,small,grains,thus,phase,remarkably,stabilized,Additionally,found,achieves,suppressed,charge,recombination,appropriate,energy,level,alignment,compared,pristine,noticeable,increment,from,control,achieved,Moreover,exhibits,excellent,environmental,thermal,remaining,original,after,aging,relative,humidity,heating,nitrogen,glove,box,respectively,presents,improved,opera,initial,under,maximum,power,point,MPP,tracking,This,work,effective,approach

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