期刊
JOURNAL OF ENERGY CHEMISTRY
卷 24, 期 6, 页码 717-721出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jechem.2015.10.014
关键词
TiO2 nanoparticle; Planar-heterojunction; Perovskite solar cell; Wettability; Electron transport layers
资金
- Natural Science Foundation of China [91233204, 51372036, 51102001]
- Key Project of Chinese Ministry of Education [113020A]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120043110002]
- National Basic Research Program [2012CB933703]
- 111 project [B13013]
- International Science & Technology Cooperation Program of China [2013DFG50150]
- Fundamental Research Funds for the Central Universities [2412015KJ1010, 14ZZ1510]
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 crystallization 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. (C) 2015 Science Press and Dalian Institute of Chemical Physics. All rights reserved.
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