Citation: Ping Liu, Tu Hua Chen, Wan Zhang Pan, Ming Sheng Huang, Wen Ji Deng, Yu Liang Mai, An Bo Luan. Flexible organic photovoltaic devices based on oligothiophene derivatives[J]. Chinese Chemical Letters, ;2008, 19(2): 207-210. doi: 10.1016/j.cclet.2007.12.006 shu

Flexible organic photovoltaic devices based on oligothiophene derivatives

a Research Institute of Materials Science, South China University of Technology, Guangzhou 510640, China;
b Department of Applied Physics, South China University of Technology, Guangzhou 510640, China;
c Guangdong Province Petroleum Chemicals Institute, Guangzhou 510665, China

Received Date: 27 August 2007

Fund Project: This work was supported by the Ministry of Science and Technology of China (National Key Program for Basic Research, No. 2001-CCA03500), NSFC (Nos. 20674022, 20534020, and 20774031). We also thank the Natural Science Foundation of Guangdong (Nos. 04105931 and 2006A10702003) and Guangzhou (No. 2004J1-C0041) for financial support.

For the purpose of developing flexible organic photovoltaic devices, we have fabricated two flexible devices using 5-formyl-2, 2':5', 2":5", 2"'-quaterthiophene (4T-CHO), 5-formyl-2, 2':5', 2":5", 2'":5"', 2"''-quinquethiophene (5T-CHO) and 3, 4, 9, 10-peryle-netertracarboxylic dianhydride (PTCDA).The PET-ITO/4T-CHO/PTCDA/AI device has an open circuit voltage (V∝) of 1.56 V, photoelectric conversion efficiency of 0.77%.The PET-ITO/ST-CHO/PTCDA/AI device has a V_∝ of 1.70 V, photoelectric conversion efficiency of 0.84%.The two flexible devices have high V_∝(1.56 and 1.70 V).It is possible that intermolecular hydrogen bonding between-CHO group of nT-CHO and carboxylic dianhydride of PTCDA contributes to enhancing the efficiency by promoting interfacial electron transfer and eliminating the subconducting band trap sites.
- Flexible organic photovoltaic device,
- Oligothiophene derivative
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