Joint electrical, photophysical, and photovoltaic studies on truxene dye-sensitized solar cells: Impact of arylamine electron donors

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Title:	Joint electrical, photophysical, and photovoltaic studies on truxene dye-sensitized solar cells: Impact of arylamine electron donors
Authors:	鄭芳怡;Wang, Zhihui;Liang, Mao;Wang, He;Wang, Peng;Cheng, Fangyi;Sun, Zhe;Song, Xue
Contributors:	地球科學學院大氣科學學系
Keywords:	Amines - chemistry;Aniline Compounds - chemistry;cobalt;Coloring Agents - chemistry;cyclic voltammetry;Dyes;dyes/pigments;Electric Power Supplies;Electrochemistry;Electron Transport;Models, Molecular;Molecular Conformation;Pyrroles - chemistry;solar cells;Solar Energy
Date:	2014-01-01
Issue Date:	2026-04-21 13:52:07 (UTC+8)
Publisher:	Wiley-VCH Verlag;Weinheim: WILEY-VCH Verlag
Abstract:	摘要： The judicious design of electron donors is one of the viable tactics to improve the efficiency of organic dyes for dye‐sensitized solar cells (DSCs) employing outer‐sphere redox couples. Herein, a hexahexyltruxene‐substituted 4‐(hexyloxy)‐N‐phenylaniline (HT‐HPA) segment is constructed and employed as the electron donor in two organic push–pull dyes (M28 and M29) with high molar absorption coefficient values. Relative to its congener (C241) possessing the dihexyloxy‐substituted triphenylamine electron donor, M29 exhibits red‐shifted absorption as well as enhanced maximum molar absorption coefficient values. A thorough comparison with M29 and C241 demonstrates that the HT‐HPA segment adequately insulates the TiO2 surface from the electrolyte, which prevents back‐recombination and prolongs electron lifetime in the semiconductor. The diminishment of charge recombination not only enables attainment of strikingly high photovoltages (approaching 1 V), but also overcompensates the disadvantageous impact of lower dye‐load amounts. As a result, the dye transformation from C241 to M29 brings forth an efficiency improvement from 7.3 % to 8.5 % at the 100 mW cm−2 simulated AM1.5 conditions. Our work should shed light on the future design of more powerful push–pull organic photosensitizers for iodine‐free DSCs. Good electron donor: Incorporation of a hexahexyltruxene‐substituted 4‐(hexyloxy)‐N‐phenylaniline electron donor into donor–π–acceptor sensitizers for dye‐sensitized solar cells is shown to lead to devices with improved conversion efficiency when compared with more widely used dihexyloxy‐substituted triphenylamine electron donors. 其他題名： ChemSusChem 出版者： Weinheim: WILEY-VCH Verlag 出版日期： 2014-03 出處： ChemSusChem, 2014-03, Vol.7 (3), p.795-803 版權： 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim 版權： 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 版權： 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 識別號： ISSN: 1864-5631 識別號： ISSN: 1864-564X 識別號： EISSN: 1864-564X 識別號： DOI: 10.1002/cssc.201301155 識別號： PMID: 24493016
Appears in Collections:	[Department of Atmospheric Sciences] journal & Dissertation

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