Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells  

作　　者：Linsheng Huang Xiaowen Zhou Rui Xue Pengfei Xu Siliang Wang Chao Xu Wei Zeng Yi Xiong Hongqian Sang Dong Liang 

机构地区：[1]National Engineering Research Center for Agro‑Ecological Big Data Analysis and Application,School of Electronics and Information Engineering,Anhui University,No.111 Jiulong Road,Hefei 230601,People’s Republic of China [2]Science and Technology Institute,Hubei Key Laboratory of Biomass Fibers and Eco‑Dyeing and Finishing,Wuhan Textile University,Wuhan 430073,People’s Republic of China [3]School of Physics and Technology,MOE Key Laboratory of Artificial Micro‑and Nano‑Structures and Center for Electron Microscopy,Wuhan University,Wuhan 430072,People’s Republic of China [4]Department of Physics,King’s College London,The Strand,London WC2R 2LS,UK

出　　处：《Nano-Micro Letters》2020年第3期199-217,共19页纳微快报（英文版）

基　　金：supported by the Science & Technology Project of Anhui Province (16030701091);the Natural Science Research Project of Anhui Provincial Education Department (KJ2019A0030);the Support Project of Outstanding Young Talents in Anhui Provincial Universities (gxyqZD2018006);the National Natural Science Foundation of China(11704002, 31701323);the Anhui Provincial Natural Science Foundation (1908085QF251,1808085MF185)

摘　　要：A multi-dimensional conductive heterojunction structure,composited by TiO2,SnO2,and Ti3C2TX MXene,is facilely designed and applied as electron transport layer in efficient and stable planar perovskite solar cells.Based on an oxygen vacancy scramble effect,the zero-dimensional anatase TiO2 quantum dots,surrounding on two-dimensional conductive Ti3C2TX sheets,are in situ rooted on three-dimensional SnO2 nanoparticles,constructing nanoscale TiO2/SnO2 heterojunctions.The fabrication is implemented in a controlled lowtemperature anneal method in air and then in N2 atmospheres.With the optimal MXene content,the optical property,the crystallinity of perovskite layer,and internal interfaces are all facilitated,contributing more amount of carrier with effective and rapid transferring in device.The champion power conversion efficiency of resultant perovskite solar cells achieves 19.14%,yet that of counterpart is just 16.83%.In addition,it can also maintain almost 85%of its initial performance for more than 45 days in 30–40%humidity air;comparatively,the counterpart declines to just below 75%of its initial performance.A multi-dimensional conductive heterojunction structure,composited by TiO2,SnO2,and Ti3 C2 TX MXene,is facilely designed and applied as electron transport layer in efficient and stable planar perovskite solar cells.Based on an oxygen vacancy scramble effect,the zero-dimensional anatase TiO2 quantum dots,surrounding on two-dimensional conductive Ti3 C2 TX sheets,are in situ rooted on three-dimensional SnO2 nanoparticles,constructing nanoscale TiO2/SnO2 heterojunctions.The fabrication is implemented in a controlled lowtemperature anneal method in air and then in N2 atmospheres.With the optimal MXene content,the optical property,the crystallinity of perovskite layer,and internal interfaces are all facilitated,contributing more amount of carrier with effective and rapid transferring in device.The champion power conversion efficiency of resultant perovskite solar cells achieves 19.14%,yet that of counterpart is just 16.83%.In addition,it can also maintain almost 85% of its initial performance for more than 45 days in 30-40% humidity air;comparatively,the counterpart declines to just below 75% of its initial performance.

关 键 词：In situ fabrication Multi-dimensional heterojunction Oxygen vacancy scramble effect Electron transport layer Perovskite solar cells 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]