Synthesis and Photovoltaic Properties of Triazine-Cored Star Shaped Conjugate Thiophene Derivatives

• Main Authors: Chien-Yi Huang, 黃倩宜
• Other Authors: 李榮和
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/25566707966447305167

碩士 === 國立中興大學 === 化學工程學系所 === 101 === The solution processable star-shaped organic small molecules TTVTPA and TTVCZ with three D-Π-A branches based on trazine core as acceptor unit (A), triphenylamine or carbazole end group as donor (D) umit, thionphene vinylene as Π–conjugation bridge were synthesized for used as photoenergy conversion layer in bulk-heterojunction organic solar cells (OSCs). TTVTPA and TTVCZ are soluble in common organic solvents. Excellent thermal stability was observed for TTVTPA and TTVCZ. The TTVTPA and TTVCZ shows two absorption bands in the range of 250-600 nm, corresponding to the band gaps of 2.05 and 2.09 eV, respectively. The performance of the OSCs was modified significantly with varied of TTVTPA (or TTVCZ) /fullerene derivative (PC61BM or PC71BM) weight ratio. A power conversion efficiency of 2.48 %, a short-circuit current density of 10.57 mA/cm2, an open-circuit voltage of 0.69 V, and a fill factor of 0.34 were observed for OSC based on the active layer of TTVTPA/PC71BM (1:7, w/w).