1404490-06-7Relevant academic research and scientific papers
High-performance dipolar organic dyes with an electron-deficient diphenylquinoxaline moiety in the π-conjugation framework for dye-sensitized solar cells
Li, Sie-Rong,Lee, Chuan-Pei,Kuo, Hui-Tung,Ho, Kuo-Chuan,Sun, Shih-Sheng
, p. 12085 - 12095 (2012/10/29)
We report here the synthesis and electrochemical and photophysical properties of a series of easily prepared dipolar organic dyes and their application in dye-sensitized solar cells (DSSCs). For the six organic dyes, the molecular structures comprised a triphenylamine group as an electron donor, a cyanoacrylic acid as an electron acceptor, and an electron-deficient diphenylquinoxaline moiety integrated in the π-conjugated spacer between the electron donor and acceptor moieties. The incorporation of the electron-deficient diphenylquinoxaline moiety effectively reduces the energy gap of the dyes and broadly extends the spectral coverage. DSSCs based on dye 6 produced the best overall cell performance of 7.35 %, which translates to approximately 79 % of the intrinsic efficiency of the DSSCs based on the standard N719 dye under identical experimental conditions. The high performance of DSSCs based on dye 6 among the six dyes explored is attributed to the combined effects of high dye loading on a TiO2 surface, rapid dye regeneration, and effective retardation of charge recombination. Copyright
