Effect of the thieno[3, 4-c]pyrrole-4, 6-dione on properties of the cyclic thiourea triphenylamine sensitizers. (February 2019)

• Record Type: Journal Article
• Authors: Wang, Qi; Weng, Qiang; Chen, Ran; An, Qi; Zhu, Shengbo; An, Zhongwei; Chen, Xinbing; Chen, Pei
• Is Part Of: Dyes and pigments. Volume 161(2019)
• Page Start: 197
• Page End: 204
• Publication Date: 2019-02
• Subjects: Cycle thiourea triphenylamine -- Thieno[3, 4-c]pyrrole-4, 6-dione -- Light harvest -- Dye-sensitized solar cells; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.09.034
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: The thieno[3, 4-c]pyrrole-4, 6-dione (TPD) was applied as an acceptor to insert or replace one ring in the π-linker of the cyclic thiourea triphenylamine dyeAZ6 . Their light harvest abilities were investigated by UV–vis spectra both in the solution and on the films. The results show that a much higher light absorption abilities have been obtained by the molecular modification. The photovoltaic properties in DSSCs were also evaluated by J-V curves and IPCE measurements. The low photovoltaic conversion efficiencies (PCE) (ST3: 2.29% and ST1: 2.42%) were observed. The improvement PCE ofST2 (3.23%) were realized by further modification ofST1 and verified that the π-π stacking is the main reason to decline the PCE. The theoretical calculation and co-sensitized method were all used to clarify the relationship of molecular structure and properties. Highlights: Three organic dyesST1, ST2 andST3 with the cyclic thiourea donor and TPD acceptor were synthesized. The insertion or replacement of one π-linker by TPD can increase the light harvest ability. The CDCA can suppress the aggregation of the dyes to increase the PCE of ST2 from 3.23% to 3.93%.