Phenothiazine-based dyes with bilateral extension of π-conjugation for efficient dye-sensitized solar cells

被引:82
作者
Iqbal, Zafar [1 ,3 ]
Wu, Wu-Qiang [2 ]
Kuang, Dai-Bin [2 ]
Wang, Lingyun [1 ]
Meier, Herbert [4 ]
Cao, Derong [1 ]
机构
[1] S China Univ Technol, Sch Chem & Chem Engn, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Peoples R China
[2] Sun Yat Sen Univ, Sch Chem & Chem Engn, KLGHEI Environm & Energy Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China
[3] PCSIR Labs Complex, Lahore 54000, Pakistan
[4] Johannes Gutenberg Univ Mainz, Inst Organ Chem, D-55099 Mainz, Germany
基金
中国国家自然科学基金;
关键词
Dye-sensitized solar cells; Phenothiazine; Bilateral extension; Recombination; Photovoltaic performance; Organic dye; ALKYL CHAIN-LENGTH; ORGANIC-DYES; CONVERSION-EFFICIENCY; PERFORMANCE; ACCEPTOR; BEARING; DONOR;
D O I
10.1016/j.dyepig.2012.11.010
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Four novel organic photo-sensitizers based on phenothiazine were designed, synthesized and characterized for efficient dye-sensitized solar cells. Anisole, octyloxybenzene and dodecyloxybenzene were incorporated into the phenothiazine by an Ullmann reaction. An additional octyloxybenzene was incorporated into one dye unit through a Suzuki coupling reaction. The modified phenothiazine moiety acts as an electron donor and cyanoacrylic acid acts as an electron acceptor and anchoring unit. The photophysical, electrochemical and sensitizing characteristics of the new dyes were evaluated. The bis(octyloxybenzene) substituted dye delivered the best performance with its sensitized solar cell displaying an overall power conversion efficiency of 5.73% under standard illumination. The results indicate that bilateral conjugate extension of the pi conjugation can increase their light harvesting capacity and electron lifetime, leading to improvements in the efficiency of their dye-sensitized solar cells. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:722 / 731
页数:10
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