Efficient and Stable Large-Area Perovskite Solar Cells with Inorganic Perovskite/Carbon Quantum Dot-Graded Heterojunction  

作　　者：Qiang Sun Cai Shen Deyu Wang Tao Zhang Huaxia Ban Yan Shen Zhipan Zhang Xiao-Li Zhang Guanjun Yang Mingkui Wang 

机构地区：[1]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China [2]Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,1219 Zhongguan Road,Ningbo 315201,China [3]School of Chemistry,Beijing Institute of Technology,Beijing 102488,China [4]State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials,School of Materials Science and Engineering,Zhengzhou University,450001,China [5]State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China

出　　处：《Research》2021年第1期1274-1283,共10页研究（英文）

基　　金：supported by the National Key Research and Development Program of China[2018YFB1502900,2019YFE0101300];the National Natural Science Foundation of China[No.21975088];the National Natural Science Foundation of China Major International(Regional)Joint Research Project[NO.51961165106].

摘　　要：This work reports on a compositionally graded heterojunction for photovoltaic application by cooperating fluorine-doped carbon quantum dots(FCQDs in short)into the CsPbI_(2.5)Br_(0.5)inorganic perovskite layer.Using this CsPbI_(2.5)Br_(0.5)/FCQDs graded heterojunction in conjunction with low-temperature-processed carbon electrode,a power conversion efficiency of 13.53%for 1 cm^(2)all-inorganic perovskite solar cell can be achieved at AM 1.5G solar irradiation.To the best of our knowledge,this is one of the highest efficiency reported for carbon electrode based all-inorganic perovskite solar cells so far,and the first report of 1 cm^(2)carbon counter electrode based inorganic perovskite solar cell with PCE exceeding 13%.Moreover,the inorganic perovskite/carbon quantum dot graded heterojunction photovoltaics maintained over 90%of their initial efficiency after thermal aging at 85°for 1056 hours.This conception of constructing inorganic perovskite/FCQDs graded heterojunction offers a feasible pathway to develop efficient and stable photovoltaics for scale-up and practical applications.

关 键 词：PEROVSKITE INORGANIC GRADED 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]