Vapor phase fabrication of three-dimensional arrayed BiI3 nanosheets for cost-effective solar cells  

作　　者：Yiyi Zhu Qianpeng Zhang Matthew Kam Swapnadeep Poddar Leilei Gu Shijun Liang Pengfei Qi Feng Miao Zhiyong Fan 

机构地区：[1]HKUST-Shenzhen Research Institute,Shenzhen,China [2]Department of Electronics and Computer Engineering,Hong Kong University of Science and Technology(HKUST),Hong Kong,SAR,China [3]National Laboratory of Solid State Microstructures,School of Physics,School of Electronic Science and Engineering,Collaborative Innovation Centre of Advanced Microstructures,Nanjing University,Nanjing,China [4]Zhong Shan Rui Ke New Energy Co.Ltd.,Zhongshan,Guangdong,China

出　　处：《InfoMat》2020年第5期975-983,共9页信息材料（英文）

基　　金：General Research Fund,Grant/Award Number:16237816;National Key Basic Research Program of China,Grant/Award Number:2015CB921600;National Natural Science Foundation of China,Grant/Award Numbers:51672231,61574076;Natural Science Foundation of Jiangsu Province,Grant/Award Number:BK20180330;the Science and Technology Plan of Shenzhen,Grant/Award Number:JCYJ20170818114107730;supported by the Science and Technology Plan of Shenzhen(JCYJ20170818114107730),National Natural Science Foundation of China(Project No.51672231),The General Research Fund(Project No.16237816)from the Hong Kong Research Grant Council,Natural Science Foundation of Jiangsu Province(Project No.BK20180330);National Natural Science Foundation of China(Project No.61574076);National Key Basic Research Program of China(Project No.2015CB921600).

摘　　要：Multilayered photovoltaic absorbers have triggered widespread attention for their unique structure and properties.However,multilayered materials in the randomly oriented polycrystalline thin-film lead to ineffective carrier transport and collection,which hinders the process of achieving high-performance solar cells.Herein,this issue is tackled by producing the three-dimensional(3D)heterojunction BiI3 nanosheets(NSs)solar cells,which embed vertically aligned monocrystalline BiI3 NSs into spiro-OMeTAD.The preferred orientation of BiI3 NSs and large p-n junction areas of 3D heterojunction structure enable a strong light absorption and effective carrier transport and collection,and thus a power conversion efficiency(PCE)of 1.45%was achieved.Moreover,this PCE is the highest ever reported for BiI3 based solar cells to our best knowledge.Moreover,the nonencapsulated device remained 96%of the initial PCE after 24 h continuous one sun illumination at^70%humidity condition,and 82%of the initial PCE after 1-month storage at^30%humidity condition.

关 键 词：3D solar cells BiI3 multilayered semiconductors 

分 类 号：TM914.4[电气工程—电力电子与电力传动]