TiO_2 nanoparticle-based electron transport layer with improved wettability for efficient planar-heterojunction perovskite solar cell  

作　　者：Peng Chen Yinglin Wang Meiqi Wang Xintong Zhang Lingling Wang Yichun Liu 

机构地区：[1]Center for Advanced Optoelectronic Functional Materials Research,and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education,Northeast Normal University

出　　处：《Journal of Energy Chemistry》2015年第6期717-721,共5页能源化学（英文版）

基　　金：supported by the Natural Science Foundation of China(grant no.91233204,51372036 and 51102001);the Key Project of Chinese Ministry of Education(no.113020A);the Specialized Research Fund for the Doctoral Program of Higher Education(20120043110002);the National Basic Research Program(2012CB933703);the 111 project(no.B13013);the International Science & Technology Cooperation Program of China(2013DFG50150);the Fundamental Research Funds for the Central Universities(2412015KJ010 and 14ZZ1510)

摘　　要：The electron transport layer （ETL） plays an important role in planar heterojunction perovskite solar cell （PSCs）, by affecting the light-harvesting, electron injection and transportation processes, and especially the crystal- lization of perovskite absorber. In this work, we utilized a commercial TKD-TiO2 nanoparticle with a small diameter of 6 nm for the first time to prepare a compact ETL by spin coating. The packing of small-size particles endowed TKD-TiO2 ETL an appropriate surface-wettability, which is beneficial to the crystallization of perovskite deposited via solution-processed method. The uniform and high-transmittance TKD-TiO2 films were successfully incorporated into PSCs as ETLs. Further careful optimization of ETL thickness gave birth to a highest power conversion efficiency of 11.0%, which was much higher than that of PSC using an ETL with the same thickness made by spray pyrolysis. This TKD-TiO2 provided a universal solar material suitable for the further large-scale production of PSCs. The excellent morphology and the convenient preparation method of TKD-TiO2 film gave it an extensive application in photovoltaic devices.The electron transport layer （ETL） plays an important role in planar heterojunction perovskite solar cell （PSCs）, by affecting the light-harvesting, electron injection and transportation processes, and especially the crystal- lization of perovskite absorber. In this work, we utilized a commercial TKD-TiO2 nanoparticle with a small diameter of 6 nm for the first time to prepare a compact ETL by spin coating. The packing of small-size particles endowed TKD-TiO2 ETL an appropriate surface-wettability, which is beneficial to the crystallization of perovskite deposited via solution-processed method. The uniform and high-transmittance TKD-TiO2 films were successfully incorporated into PSCs as ETLs. Further careful optimization of ETL thickness gave birth to a highest power conversion efficiency of 11.0%, which was much higher than that of PSC using an ETL with the same thickness made by spray pyrolysis. This TKD-TiO2 provided a universal solar material suitable for the further large-scale production of PSCs. The excellent morphology and the convenient preparation method of TKD-TiO2 film gave it an extensive application in photovoltaic devices.

关 键 词：TiO2 nanoparticle Planar-heterojunction Perovskite solar cell Wettability Electron transport layers 

分 类 号：TB383.2[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]