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Frontiers of Optoelectronics

Front Optoelec Chin    2011, Vol. 4 Issue (1) : 108-113     DOI: 10.1007/s12200-011-0203-4
RESEARCH ARTICLE |
Flexible solar cells based on PCBM/P3HT heterojunction
Gentian YUE, Jihuai WU(), Yaoming XIAO, Jianming LIN, Miaoliang HUANG
Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou 362021, China
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Abstract

[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) / poly (3-hexylthiophene) (P3HT) heterojunction has not only the absorption in ultraviolet light for PCBM, but also the absorption in visible light for P3HT, which widens the incident light harvest range, improving the photoelectrical response of hybrid solar cell effectively. Using conducting polymers blend heterojunction consisting of C60 derivatives PCBM and P3HT as charge carrier transferring medium to replaceI3-/I- redox electrolyte and dye, a novel flexible solar cell was fabricated in this study. The influence of PCBM/P3HT mass ratio on the photovoltaic performance of the solar cell was also studied. Under a simulated solar irradiation of 100 mW·cm-2, the flexible solar cell achieved a light-to-electric energy conversion efficiency of 1.04%, an open circuit voltage of 0.86 V, short circuit current density of 2.6 mA·cm-2 and fill factor (FF) of 0.46.

Keywords flexible solar cell      heterojunction      [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)      poly (3-hexylthiophene) (P3HT)     
Corresponding Authors: WU Jihuai,Email:jhwu@hqu.edu.cn   
Issue Date: 05 March 2011
 Cite this article:   
Jianming LIN,Miaoliang HUANG,Gentian YUE, et al. Flexible solar cells based on PCBM/P3HT heterojunction[J]. Front Optoelec Chin, 2011, 4(1): 108-113.
 URL:  
http://journal.hep.com.cn/foe/EN/10.1007/s12200-011-0203-4
http://journal.hep.com.cn/foe/EN/Y2011/V4/I1/108
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Jianming LIN
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Jihuai WU
Yaoming XIAO
Fig.1  UV-Vis absorption spectra of PCBM, P3HT, and PCBM/P3HT hybrid
Fig.1  UV-Vis absorption spectra of PCBM, P3HT, and PCBM/P3HT hybrid
Fig.2  PL spectra excited at 430 nm. (a) PCBM, P3HT and PCBM/P3HT; (b) PCBM/P3HT with different ratios
Fig.2  PL spectra excited at 430 nm. (a) PCBM, P3HT and PCBM/P3HT; (b) PCBM/P3HT with different ratios
Fig.3  IPCE of solar cells with PCBM, P3HT and PCBM/P3HT
Fig.3  IPCE of solar cells with PCBM, P3HT and PCBM/P3HT
Fig.4  - curves for solar cells with different PCBM/P3HT ratios
Fig.4  - curves for solar cells with different PCBM/P3HT ratios
PCBM/P3HT ratiosVOC/VJSC/(mA·cm-2)FF/%η/%
1∶10.862.300.430.85
1∶1.250.892.490.400.89
1∶1.50.902.490.451.01
1∶20.872.600.461.04
1∶2.250.871.780.450.70
Tab.1  Influence of PCBM/P3HT ratios on photoelectric properties of solar cells
solar cellsVOC/VJSC/(mA·cm-2)FF/%η/%
FTO/glass substrate with dye0.875.520.643.09
FTO/glass substrate without dye0.855.470.642.97
ITO/PEN substrate with dye0.873.020.541.43
ITO/PEN substrate without dye0.872.600.461.04
Tab.2  Influence of substrate and dye on photovoltaic properties of solar cells
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