Synthesis, Characterization, and Photovoltaic Properties of Two-Dimensional Donor-Acceptor Conducting Polymer Containing Triphenylamine Side Chain

• Main Authors: Fong-Yu Hsu, 徐豐瑜
• Other Authors: 戴子安
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/48673367141782966642

碩士 === 臺灣大學 === 化學工程學研究所 === 98 === In this master thesis work, we designed and synthesized a novel two-dimensional donor-acceptor (D-A) conjugated polymer PTQT which containing electron-withdrawing subunit quinoxaline as acceptor core and electron-donating triphenylamine (TPA) in side chain and thiophene in main chain as donor groups. Due to TPA-based materials are widely known as excellent hole-transporters. We have used preparative gel permeation chromatography (prep. GPC) to prepare PTQTs of various molecular weights with narrow polydispersity (PDI). From the UV-vis spectra of PTQT, a bathochromic effect of their absorption maximum at visible region translate from 561 to 616 nm with increasing chain length (Mn: from 5000 to 83000). PTQT is electrochemically active in oxidation and the cyclic voltammetry measurement shows that the HOMO energy level of PTQT is located at -5.25 eV. The TGA analysis of PTQT and PTQTs show good thermal stability that is higher than 400 ℃. Polymer solar cell fabricated by using PTQT/PCBM blend system shows a high open-circuit voltage ~0.79 V and a power conversion efficiency (PCE) up to 0.82 % under AM 1.5 simulated sun light (100 mW/cm2).