Phenothiazine derivatives-based D-π-A and D-A-π-A organic dyes for dye-sensitized solar cells

被引：40

作者：

Yang, Xichuan ^{[1
]}

Zhao, Jianghua ^{[1
]}

Wang, Lei ^{[1
]}

Tian, Jie ^{[1
]}

Sun, Licheng ^{[1
,2
]}

机构：

[1] Dalian Univ Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, Dalian 116024, Peoples R China

[2] KTH Royal Inst Technol, Sch Chem Sci & Engn, Dept Chem, S-10044 Stockholm, Sweden

来源：

RSC ADVANCES | 2014年 / 4卷 / 46期

关键词：

SIGNIFICANT IMPROVEMENT; HIGHLY EFFICIENT; PERFORMANCE; ENERGY;

D O I：

10.1039/c4ra01858c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

D-pi-A and D-A-pi-A-structured organic dyes represent different developmental directions of photosensitizers in dye-sensitized solar cells (DSSCs). In this work, two phenothiazine derivatives-based D-pi-A and D-A-pi-A-structured organic dyes have been synthesized and applied in DSSCs. The physical and electrochemical properties of both dyes have been investigated systematically. The results show that the D-A-pi-A-structured dye exhibits a broader spectrum response but lower molar coefficient of extinction when compared to the D-pi-A-structured dye. Regarding photovoltaic performance, the D-pi-A-structured dye yields a higher efficiency (h) of 7.5% with a higher short-circuit current density (J(sc)) of 16.36 mA cm(-2) and open-circuit voltage (V-oc) of 706 mV than that of the D-A-pi-A-structured dye. Incident photon-to-electron conversion efficiency (IPCE) studies and impedance analysis also support these results. These results demonstrate that the phenothiazine derivatives-based D-pi-A-structured organic dyes can compete with, and even exceed, D-A-pi-A-structured organic dyes under the same test conditions.

引用

页码：24377 / 24383

页数：7

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