Citation: Ping Liu, Jia Le Huang, Wan Zhang Pan, Ming Sheng Huang, Wen Ji Deng, Yu Liang Mai, An Bo Luan. Organic photovoltaic devices with high open-circuit voltage based on oligothiophene derivatives[J]. Chinese Chemical Letters, ;2007, 18(4): 437-440. doi: 10.1016/j.cclet.2007.01.030 shu

Organic photovoltaic devices with high open-circuit voltage 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 Gungdong Province Petroleum Chemicals Institute, Guangzhou 510665, China

Received Date: 17 October 2006

Fund Project: This work was supported by the Ministry of Science and Technology of China (National Key Program for Basic Research,No. 2001-CCA03500) and NNSFC (Nos. 20674022 and 20534020). 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 organic photovoltaic devices with good performance characteristics, we have fabricated two devices using 4T-CHO, 5T-CHO and PTCDA. The ITO/4T-CHO/PTCDA/A1 device has a V_oc of 2.45 V and photoelectric conversion efficiency of 2.76%. The ITO/5T-CHO/PTCDA/Al device has a V_oc of 2.1 3V and photoelectric conversion efficiency of 2.90%. The two devices have higher V_oc (2.45 and 2.13 V). It is possible that intermolecular hydrogen bonding between -CHO group of nT-CHO and carboxylic dianhydride of PTCDA contribute to enhance the efficiency by promoting interfacial electron transfer and eliminating the subconducting band trap sites.
- Oligothiophene,
- Organic photovoltaic property,
- Device
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