期刊
FRONTIERS IN ENERGY
卷 6, 期 2, 页码 179-183出版社
HIGHER EDUCATION PRESS
DOI: 10.1007/s11708-012-0177-y
关键词
organic solar cells (OSCs); open circuit voltage; fluorescent dye doping; 4-(dicyanomethylene)-2t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB)
资金
- National Natural Science Foundation of China (NSFC) [60425101-1, 60736005]
- Foundation for Innovative Research Groups of the NSFC [60721001]
- Provincial Program [9140A02060609DZ0208]
- Doctoral Fund of Ministry of China [20090185110020]
- National HiTech Research and Development Program of China [2007AA03Z424]
- SRF for ROCS, SEM [GGRYJJ08-05]
- Young Excellence Project of Sichuan [09ZQ026-074]
The open circuit voltage (VOC) of smallmolecule organic solar cells (OSCs) could be improved by doping suitable fluorescent dyes into the donor layers. In this paper, 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) was used as a dopant, and the performance of the OSCs with different DCJTB concentration in copper phthalocyanine (CuPc) was studied. The results showed that the VOC of the OSC with 50% of DCJTB in CuPc increased by 15%, compared with that of the standard CuPc/fullerene (C-60) device. The enhancement of the VOC was attributed to the lower highest occupied molecular orbital (HOMO) level in the DCJTB than that in the CuPc. Also, the light absorption intensity is enhanced between 400 and 550 nm, where CuPc and C-60 have low absorbance, leading to a broad absorption spectrum.
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