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题名: Co-sensitization of Dithiafulvenyl-Phenothiazine Based Organic Dyes with N719 for Efficient Dye-Sensitized Solar Cells
作者: Luo, JS; Wan, ZQ; Jia, CY; Wang, Y; Wu, XC; Yao, XJ(姚小军)
收录类别: SCIE ; EI
出版日期: 2016-09-01
刊名: ELECTROCHIMICA ACTA
卷号: 211, 页码:364-374
出版者: ELSEVIER
出版地: OXFORD
英文摘要: The introduction of additional electron donor and elongation of pi-conjugated bridge represents a feasible strategy to enhance light harvesting in both breadth and intensity of donor-(pi conjugated spacer)-acceptor (D-pi-A) dyes suitable for dye-sensitized solar cells (DSSCs). Here, two novel metal-free organic dyes, in which dithiafulvenyl unit was introduced into phenothiazine donor as an additional electron donor, cyanoacrylic acid as the electron acceptor, and without (PTZ-2) or with (PTZ-3) a benzene as the pi-linker between phenothiazine donor and cyanoacrylic acid electron-withdrawing group, were synthesized by modifying the simple D-pi-A dye (PTZ-1) and successfully utilized in DSSCs. Their photophysical, electrochemical, photovoltaic properties and theoretical calculations were further investigated. Relative to the reference dye PTZ-1, the power conversion efficiencies (PCEs) increased significantly from 4.04% to 5.81% (PTZ-2) and 5.22% (PTZ-3), which came mainly from the enhancement of short-circuit current (J(sc)) due to the broader molecular absorption spectra and higher molar extinction coefficients. What's more, it is worth noting that the dyes of PTZ-2 and PTZ-3 have strong absorption, which can compensate for that of N719 in the low wavelength region, especially in the region of similar to 300-500 nm. Therefore, a co-sensitization approach has been used for achieving enhanced performances in DSSCs wherein N719 was co-sensitized with PTZ-2 and PTZ-3, respectively. Consequently, the co-sensitized DSSC (PTZ-2 + N719) gave the highest efficiency of 8.12%, exhibiting an improvement of 16.50% compared to the device sensitized with N719 alone (PCE = 6.97%) under the same conditions. (C) 2016 Elsevier Ltd. All rights reserved.
关键词: Dye-sensitized solar cells ; Metal-free organic dyes ; Dithiafulvenyl ; Phenothiazine ; Co-sensitization
作者部门: [Luo, Junsheng ; Wan, Zhongquan ; Jia, Chunyang ; Wang, Yan] Univ Elect Sci & Technol China, Sch Microelect & Solid State Elect, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China ; [Wu, Xiaochun] Sichuan Normal Univ, Coll Chem & Mat Sci, Chengdu 610068, Peoples R China ; [Yao, Xiaojun] Lanzhou Univ, Sch Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
通讯作者: Jia, CY (reprint author), Univ Elect Sci & Technol China, Sch Microelect & Solid State Elect, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China.
学科分类: Electrochemistry
文章类型: Article
所属项目编号: National Natural Science Foundation of China [21572030, 21272033, 21402023]
所属项目名称: 国家自然科学基金项目
项目资助者: NSFC
语种: 英语
DOI: 10.1016/j.electacta.2016.05.175
ISSN号: 0013-4686
WOS记录号: WOS:000380904100041
EI记录号: 20162702553330
IR记录号: WOS:000380904100041
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/180559
Appears in Collections:化学化工学院_期刊论文

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Recommended Citation:
Luo, JS,Wan, ZQ,Jia, CY,et al. Co-sensitization of Dithiafulvenyl-Phenothiazine Based Organic Dyes with N719 for Efficient Dye-Sensitized Solar Cells[J]. ELECTROCHIMICA ACTA,2016,211:364-374.
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