Synthesis of π‐conjugated copolymers composed of benzo[2,1,3]thiadiazole and thiophene units bearing various alkyl groups and their application to photovoltaic cells |
| |
| Authors: | Kwang‐Hoi Lee Ho‐Jin Lee Kouji Kuramoto Yohei Tanaka Kazuhide Morino Atsushi Sudo Tatsuo Okauchi Akihiko Tsuge Takeshi Endo |
| |
| Institution: | 1. Molecular Engineering Institute, Kinki University, 11‐6 Kayanomori, Iizuka, Fukuoka Prefecture 820‐8555, Japan;2. Research Fellow Laboratories Yokkaichi, JSR Corporation, 100 Kawajiri‐cho, Yokkaichi, Mie Prefecture 510‐8552, Japan;3. Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology, Tobata‐ku, Kitakyushu, Fukuoka Prefecture 804‐8550, Japan |
| |
| Abstract: | π‐Conjugated polymers, PTOTBT , PTEHTBT , and PTt‐BTBT , composed of benzothiadiazole as an electron accepting unit and terthiophene as an electron donating unit in the backbone were prepared. PTOTBT , PTEHTBT , and PTt‐BTBT contained side chain groups of n‐octyl, 2‐ethylhexyl, and t‐butyl groups, respectively. Solubility, optical and thermal properties of the polymers showed strong dependences on their side chain groups. PTEHTBT having 2‐ethylhexyl groups in the side chain exhibited absorption maximum (λmax) at longer wavelength (565 nm) than PTOTBT (534 nm) and PTt‐BTBT (495 nm). PTOTBT showed higher thermal stability than the others. The prepared polymers were employed to polymer solar cells (PSCs) with a configuration of ITO/PEDOT‐PSS/polymer: PC61BH/LiF/Al. Power conversion efficiency of the PSC‐based on PTEHTBT was 1.32%. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011 |
| |
| Keywords: | conjugated polymers copolymerization functionalization of polymers photovoltaic solar cell UV‐vis spectroscopy |
|
|
