Effect of conjugated side groups on the photovoltaic performances of triphenylamine-based dyes sensitized solar cells. (January 2016)

• Record Type: Journal Article
• Authors: Long, Jun; Liu, Xunshan; Guo, Huan; Zhao, Bin; Tan, Songting
• Is Part Of: Dyes and pigments. Volume 124(2016)
• Page Start: 222
• Page End: 231
• Publication Date: 2016-01
• Subjects: Conjugated side group -- Organic dyes -- Synthesis -- Dye-sensitized solar cells -- Photovoltaic performance -- Triphenylamine; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2015.09.025
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Three novel organic dyes (LD1, LD2 andLD3) with conjugated side groups on the thiophene π-bridge are designed and synthesized for dye sensitized solar cells (DSSCs). The photophysical, electrochemical, and photovoltaic properties of the dyes have been successfully tuned by incorporating different conjugated side groups into the thiophene π-bridges moieties of dyes. Compared with the analogous dyes with non-conjugated side groups, the side group-conjugated dyes exhibited wider absorption spectra, higher molar extinction coefficients, and better photovoltaic performances. For theLD2 -based DSSCs, the maximum power conversion efficiency (PCE) of 7.71% is obtained under AM 1.5 G irradiation (100 mW cm −2 ). The result demonstrates that high-performance DSSCs can be acquired by choosing suitable conjugated side groups into the π-bridges moieties of organic dyes. Graphical abstract: Highlights: The three dyes with conjugated side groups on thiophene π-bridge were designed and synthesized. The photovoltaic properties can be regulated by introducing different conjugated side groups. TheLD2 -based dye showed a relatively high PCE of 7.41%.