title: Efficient Planar Perovskite Solar Cells with Reduced Hysteresis and Enhanced Open Circuit Voltage by Using PW12-TiO2 as Electron Transport Layer.
abstract: An electron transport layer is essential for effective operation of planar perovskite solar cells. In this Article, PW12-TiO2 composite was used as the electron transport layer for the planar perovskite solar cell in the device structure of fluorine-doped tin oxide (FTO)-glass/PW12-TiO2/perovskite/spiro-OMeTAD/Au. A proper downward shift of the conduction band minimum (CBM) enhanced electron extraction from the perovskite layer to the PW12-TiO2 composite layer. Consequently, the common hysteresis effect in TiO2-based planar perovskite solar cells was significantly reduced and the open circuit voltage was greatly increased to about 1.1 V. Perovskite solar cells using the PW12-TiO2 compact layer showed an efficiency of 15.45%. This work can contribute to the studies on the electron transport layer and interface engineering for the further development of perovskite solar cells.
authors.affiliation: School of Metallurgy and Environment, Central South University , Changsha, Hunan 410083, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Huang
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University , Changsha, Hunan 410083, China.
authors.forename: Canjun
authors.initials: C
authors.lastname: Liu
authors.affiliation: School of Metallurgy and Environment, Central South University , Changsha, Hunan 410083, China.
authors.forename: Yunxiang
authors.initials: Y
authors.lastname: Di
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University , Changsha, Hunan 410083, China.
authors.forename: Wenzhang
authors.initials: W
authors.lastname: Li
authors.affiliation: School of Metallurgy and Environment, Central South University , Changsha, Hunan 410083, China.|School of Photovoltaic and Renewable Energy Engineering, University of New South Wales , Sydney, New South Wales 2052, Australia.
authors.forename: Fangyang
authors.initials: F
authors.lastname: Liu
authors.affiliation: School of Metallurgy and Environment, Central South University , Changsha, Hunan 410083, China.
authors.forename: Liangxing
authors.initials: L
authors.lastname: Jiang
authors.affiliation: School of Metallurgy and Environment, Central South University , Changsha, Hunan 410083, China.|College of Chemistry and Chemical Engineering, Central South University , Changsha, Hunan 410083, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Photovoltaic and Renewable Energy Engineering, University of New South Wales , Sydney, New South Wales 2052, Australia.
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Hao
authors.affiliation: Department of Applied Physics, The Hong Kong Polytechnic University , Kowloon, Hong Kong 999077, China.
authors.forename: Haitao
authors.initials: H
authors.lastname: Huang
keywords: composite; electron extraction; electron transport layer; interface; planar perovskite solar cells