Effects of meta or para connected organic dyes for dye-sensitized solar cell. (November 2018)

• Record Type: Journal Article
• Authors: Jiao, Yunfei; Mao, Le; Liu, Shuaishuai; Tan, Tianwen; Wang, Donglin; Cao, Dapeng; Mi, Baoxiu; Gao, Zhiqiang; Huang, Wei
• Is Part Of: Dyes and pigments. Volume 158(2018)
• Page Start: 165
• Page End: 174
• Publication Date: 2018-11
• Subjects: Dye-sensitized solar cell -- Metal-free organic dyes -- D-π-A -- Phenothiazine -- Rhodanine acetic acid; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.05.037
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Two novel phenothiazine-based organic dyes have been designed and synthesized as sensitizers for dye-sensitized solar cell (DSSC). In these dyes, we have employed carbazole as donor, phenothiazine as π-bridge, and rhodanine acetic acid as acceptor. For comparison, a benzene group has been introduced as the π-linker between carbazole donor and phenothiazine π-bridge with meta or para connection mode. Using the dye with the para-connected method, the DSSC devices exhibited higher power conversion efficiency of 5.57% than those based on dye with meta-connection mode (4.56%). The improved performance mainly came from better short-circuit photocurrent current. Photophysical, electrochemical, theoretical calculations and electrochemical impedance spectroscopy have been further investigated to disclose corresponding device mechanisms. Graphical abstract: Image 1 Highlights: Two novel phenothiazine-based organic dyes have been designed and synthesized as sensitizers for dye-sensitized solar cell. The different effects of meta or para connected mode organic dyes for DSSC devices have been systematic researched. The dye-sensitized solar cell based on dye with para connection mode achieves a high power conversion efficiency of 5.57%.