Synthesis and photovoltaic performance of new diketopyrrolopyrrole (DPP) dyes for dye-sensitized solar cells

被引:50
作者
Guo, Fuling
Qu, Sanyin
Wu, Wenjun
Li, Jing
Ying, Weijiang
Hua, Jianli [1 ]
机构
[1] E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China
关键词
Dye-sensitized solar cells; Diketopyrrolopyrrole; Synthesis; Triphenylamine; Donor-pi-accepter-pi-donor; Chenodeoxycholic acid; NANOCRYSTALLINE TIO2 FILMS; LOW-BAND-GAP; ORGANIC-DYES; CHARGE-TRANSFER; HIGH-EFFICIENCY; MOLECULAR DESIGN; COUMARIN DYES; ENERGY-LEVELS; CONVERSION; OLIGOTHIOPHENE;
D O I
10.1016/j.synthmet.2010.06.017
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Two new metal-free organic dyes (DPP-I and DPP-II) with diketopyrrolopyrrole (DPP) core were designed and synthesized, in which triphenylamine or N,N-bis(4-methoxyphenyl)benzenamine moieties was used as the electron donor, DPP units as the pi-conjugated bridge, and carboxylic acid group as the electron acceptor. Photophysical and electrochemical properties of two dyes were investigated by UV-vis spectrometry and cyclic voltammetry. Electrochemical measurement data indicate that the tuning of the HOMO and LUMO energy levels can be conveniently accomplished by alternating the donor moiety. The DSSC based on dye DPP-I showed better photovoltaic performance: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 80.6% corresponding to an overall conversion efficiency of 2.68%. Although the power conversion efficiencies are not so high, this work explores new donor-pi-accepter-pi-donor models and the effects of molecular design on optical properties. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:1767 / 1773
页数:7
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