A facile and convenient synthesis and photovoltaic characterization of novel thieno[2,3-b]indole dyes for dye-sensitized solar cells

作者：Irgashev Roman A^*; Karmatsky Arseny A; Kozyukhin Sergey A; Ivanov Vladimir K; Sadovnikov Alexey; Kozik Vladimir V; Grinberg Vitaly A; Emets Viktor V; Rusinov Gennady L; Charushin Valery N

来源：Synthetic Metals, 2015, 199: 152-158.

DOI：10.1016/j.synthmet.2014.11.024

• Thieno[2,3-b]indole
• Thiophene
• Dyes
• Push-pull structure
• Photovoltaic
• Dye-sensitized solar cells

Two novel dyes IK-1,2 bearing the 8-alkyl-8H-thieno[2,3-b]indole unit as an electron-donating part of the push-pull system have been designed and prepared, as promising sensitizers for solar cells. The key steps of the synthesis involve the crotonic condensation of 1-alkylisatins with 2-acetylthiophene, followed by reduction of the C=C double bond and further cyclization through the Paal-Knorr reaction with the Lawesson reagent, thus leading to the formation of 2-(thien-2-yl) substituted thieno[2,3-b] indole derivatives. The optical and electrochemical properties of these dye's have been investigated by using spectrophotometry and cyclic voltammetry respectively, while their photovoltaic performance was evaluated by a device fabricatien study. The DSSCs based on IK-1 and IK-2 have demonstrated an efficiency of eta = 0.37% (FF = 73%) and eta = 0.7g% (FF = 69%) under 100 mW cm(-2) simulated AM 1.5G solar irradiation, respectively.

• 出版日期2015-1