Synthesis of new dithieno[3, 2-b:2′, 3′-d]pyrrole (DTP) dyes for dye-sensitized solar cells: effect of substituent on photovoltaic properties. Issue 23 (9th June 2016)

• Record Type: Journal Article
• Authors: Lu, Ziyi; Dai, Panpan; Wang, Chunbo; Liang, Mao; Zong, Xueping; Sun, Zhe; Xue, Song
• Is Part Of: Tetrahedron. Volume 72:Issue 23(2016)
• Page Start: 3204
• Page End: 3212
• Publication Date: 2016-06-09
• Subjects: Dye-sensitized solar cell -- Amine-free organic sensitizers -- Dithieno[3, 2-b:2′, 3′-d]pyrrole -- Photovoltaic properties; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tet.2016.04.044
• Languages: English
• ISSNs: 0040-4020

Abstract

Abstract: A new series of triarylamine-free organic dyes based on dithieno[3, 2-b:2′, 3′-d]pyrrole has been synthesized for dye-sensitized solar cells (DSSCs). The photophysical properties and DSSC performances of these dyes have been characterized. The effects of substituent in dithieno[3, 2-b:2′, 3′-d]pyrrole on the performance of the dyes have been investigated by their absorption spectra, electrochemical and photovoltaic properties. In comparison with the hexyl, the incorporation of 4-hexyloxyphenyl in dithieno[3, 2-b:2′, 3′-d]pyrrole has resulted in an improved light harvesting capacity, stability and thus photocurrent as well as efficiency of cells. X69 sensitized DSSCs affords a short circuit photocurrent of 12.1 mA cm −2, an open circuit voltage of 520 mV, and a fill factor of 0.67, corresponding to an overall conversion efficiency of 4.21% under standard AM 1.5 sunlight. Graphical abstract: