Open circuit voltage of stacked bulk heterojunction organic solar cells - art. no. 073514

被引:89
作者
Kawano, K [1 ]
Ito, N [1 ]
Nishimori, T [1 ]
Sakai, J [1 ]
机构
[1] Matsushita Elect Works Ltd, Adv Technol Dev Lab, Osaka 5718686, Japan
关键词
D O I
10.1063/1.2177633
中图分类号
O59 [应用物理学];
学科分类号
摘要
We investigate the open circuit voltage (V-OC) of stacked bulk heterojunction (BHJ) organic solar cells based on conjugated polymer and fullerene derivative by spin-coating method. Poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylene vinylene] (MDMO-PPV) blended with [6, 6]-phenyl C-61-butyric acid methyl ester (PCBM) is used as a photoactive layer. The structure is ITO(lower BHJ cell)PEDOT:PSS/MDMO-PPV:PCBM/ITO/(upper BHJ cell)PEDOT:PSS/MDMO-PPV:PCBM/Al. V-OC of the stacked cell is 1.34 V and is about 1.6 times as large as that of single BHJ organic solar cell. V-OC of the stacked cell is not proportional to the number of photoactive layers, but is the sum of the V-OC values of the upper and the lower BHJ cells. (c) 2006 American Institute of Physics.
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页数:3
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