Self-organized cholesteric liquid crystal polymer films with tunable   photonic band gap as transparent and flexible back-reflectors for   dye-sensitized solar cells

doi:10.1016/j.nanoen.2016.06.021

CORC > 北京大学 > 工学院

	Self-organized cholesteric liquid crystal polymer films with tunable photonic band gap as transparent and flexible back-reflectors for dye-sensitized solar cells
	Liu, Yumin ; Yu, Li ; Jiang, Yun ; Xiong, Wansheng ; Wang, Qian ; Sun, Jian ; Yang, Huai ; Zhao, Xing-Zhong
刊名	NANO ENERGY
	2016
关键词	Cholesteric liquid crystals Tunable photonic band gap Selective light reflection Light absorption enhancement Dye-sensitized solar cells HELICAL SUPERSTRUCTURES CONVERSION EFFICIENCY TIO2 FILMS LIGHT PERFORMANCE SPECTROSCOPY ENHANCEMENT SCATTERING INVERSION IMPEDANCE
DOI	10.1016/j.nanoen.2016.06.021
英文摘要	Dye-sensitized solar cells (DSCs) have attracted widespread attention in recent years, attributed to their low production costs, facile fabrication and tunable optical properties. In order to achieve competitive conversion efficiencies, the sunlight harvesting capacities of DSCs should be improved over a broad range of wavelengths and incidence angle. Here, we demonstrate a facile strategy to enhance the light absorptions of the devices via employing self-organized cholesteric liquid crystal (CLC) polymer films as transparent and flexible back-reflectors for DSCs. The photonic band gap of these CLC films can be precisely tailored by modulating the helical pitch and twist sense. The selective light reflection of these CLC films gives rise to the possibility for increasing the optical path length of the light in particular wavelength region while retaining the cell transparency. The enhancement of photocurrent and power conversion efficiency (PCE) reveals strong wavelength dependence owing to the selective reflection of these CLC polymer films. The DSCs with proper combination of CLC back-reflectors yield the maximum enhancement over 21% in photocurrent and 17% in PCE. The work presented here provides new insights into the design of cell geometry for achieving extra absorption enhancement, which can also be compatible with other photovoltaic concepts. (C) 2016 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [61404060, 51333001, 51173003, 51303007]; National Basic Research Program of China [2011CB933300]; Major Project of International Cooperation of the Ministry of Science and Technology [2013DFB50340]; Major Program of Chinese Ministry of Education [313002]; SCI(E); EI; ARTICLE; yanghuai@pku.edu.cn; xzzhao@whu.edu.cn; 648-656; 26
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/494480]
专题	工学院
推荐引用方式 GB/T 7714	Liu, Yumin,Yu, Li,Jiang, Yun,et al. Self-organized cholesteric liquid crystal polymer films with tunable photonic band gap as transparent and flexible back-reflectors for dye-sensitized solar cells[J]. NANO ENERGY,2016.
APA	Liu, Yumin.,Yu, Li.,Jiang, Yun.,Xiong, Wansheng.,Wang, Qian.,...&Zhao, Xing-Zhong.(2016).Self-organized cholesteric liquid crystal polymer films with tunable photonic band gap as transparent and flexible back-reflectors for dye-sensitized solar cells.NANO ENERGY.
MLA	Liu, Yumin,et al."Self-organized cholesteric liquid crystal polymer films with tunable photonic band gap as transparent and flexible back-reflectors for dye-sensitized solar cells".NANO ENERGY (2016).