(D–π–)2D–π–A‐Type Organic Dyes for Efficient Dye‐Sensitized Solar Cells. Issue 14 (24th April 2016)

• Record Type: Journal Article
• Authors: Kaewpuang, Terdkait; Prachumrak, Narid; Namuangruk, Supawadee; Jungsuttiwong, Siriporn; Sudyoadsuk, Taweesak; Pattanasattayavong, Pichaya; Promarak, Vinich
• Is Part Of: European journal of organic chemistry. Issue 14(2016)
• Page Start: 2528
• Page End: 2538
• Publication Date: 2016-04-24
• Subjects: Dyes/Pigments -- Donor–acceptor systems -- Density functional calculations -- Dye‐sensitized solar cells; Chemistry, Organic -- Periodicals; Organic compounds -- Synthesis -- Periodicals; Bioorganic chemistry -- Periodicals; Chemistry, Physical organic -- Periodicals; 547
• DOI: 10.1002/ejoc.201600190
• Languages: English
• ISSNs: 1434-193X

Abstract

Abstract: New (D–π–)2 D–π–A‐type dyes (CFTT n A, n = 2, 3) with a triarylamine as electron donor, a cyanoacrylic acid as both electron acceptor and anchoring group, and two π‐conjugated 2‐[7‐(3, 6‐di‐ tert ‐butylcarbazol‐9‐yl)‐9, 9‐dihexylfluoren‐2‐yl]thiophenes as N ‐aryl substituents on the amine donor as co‐donors have been synthesized and characterized. Compared with a traditional D–π–A‐type dye, these dyes exhibit broader absorption spectra and higher molar extinction coefficients as well as significantly enhanced photovoltaic performances. A power conversion efficiency of 6.64 % was achieved for a dye‐sensitized solar cell (DSSC) based on CFTT3A. Theoretical calculations and electrochemical impedance spectroscopic investigations revealed the mechanism of the enhanced dye properties and cell performances. Abstract : A new (D–π–)2 D–π–A‐type dye exhibits greatly improved photovoltaic performance compared with that of the traditional D–π–A‐type dye.