title: Efficient Colorful Perovskite Solar Cells Using a Top Polymer Electrode Simultaneously as Spectrally Selective Antireflection Coating.
abstract: Organometal halide perovskites have shown excellent optoelectronic properties and have been used to demonstrate a variety of semiconductor devices. Colorful solar cells are desirable for photovoltaic integration in buildings and other aesthetically appealing applications. However, the realization of colorful perovskite solar cells is challenging because of their broad and large absorption coefficient that commonly leads to cells with dark-brown colors. Herein, for the first time, we report a simple and efficient strategy to achieve colorful perovskite solar cells by using the transparent conducting polymer (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), PEDOT:PSS) as a top electrode and simultaneously as an spectrally selective antireflection coating. Vivid colors across the visible spectrum are attained by engineering optical interference effects among the transparent PEDOT:PSS polymer electrode, the hole-transporting layer and the perovskite layer. The colored perovskite solar cells display power conversion efficiency values from 12.8 to 15.1% (from red to blue) when illuminated from the FTO glass side and from 11.6 to 13.8% (from red to blue) when illuminated from the PEDOT:PSS side. The new approach provides an advanced solution for fabricating colorful perovskite solar cells with easy processing and high efficiency.
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan, Hubei 430074, P. R. China.
authors.forename: Youyu
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan, Hubei 430074, P. R. China.
authors.forename: Bangwu
authors.initials: B
authors.lastname: Luo
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan, Hubei 430074, P. R. China.
authors.forename: Fangyuan
authors.initials: F
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology , Wuhan, Hubei 430070, P. R. China.
authors.forename: Fuben
authors.initials: F
authors.lastname: Jiang
authors.affiliation: Center for Organic Photonics and Electronics (COPE), School of Electrical and Computer Engineering Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Canek
authors.initials: C
authors.lastname: Fuentes-Hernandez
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan, Hubei 430074, P. R. China.
authors.forename: Tiefeng
authors.initials: T
authors.lastname: Liu
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan, Hubei 430074, P. R. China.
authors.forename: Lin
authors.initials: L
authors.lastname: Mao
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan, Hubei 430074, P. R. China.
authors.forename: Sixing
authors.initials: S
authors.lastname: Xiong
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan, Hubei 430074, P. R. China.
authors.forename: Zaifang
authors.initials: Z
authors.lastname: Li
authors.affiliation: State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology , Wuhan, Hubei 430070, P. R. China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.affiliation: Center for Organic Photonics and Electronics (COPE), School of Electrical and Computer Engineering Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Bernard
authors.initials: B
authors.lastname: Kippelen
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan, Hubei 430074, P. R. China.
authors.forename: Yinhua
authors.initials: Y
authors.lastname: Zhou
keywords: Perovskite solar cells; antireflection coating; building integrated photovoltaics; colorful; conducting polymer