Abstract
The influence of poly(2-methoxy-5-(2’-ethyl)-hexyloxy-p-phenylene vinylene) (MEH-PPV) and (6,6)-phenyl C61 butyric acid methyl ester (PCBM) weight ratio on the photovoltaic performance of inverted type organic solar cell based on Eosin-Y-coated ZnO nanorods has been investigated. Experimental results showed that the photovoltaic performance improved with weight ratio of MEH-PPV:PCBM from 1:1 to 1:3 due to better percolation pathway for electron transport and enhanced infiltration of polymer blend into interspace of Eosin-Y-coated ZnO nanorods. However, the overall performance started to decrease at weight ratio of 1:4 due to the aggregation of PCBM clusters which results in poor polymer blend infiltration. The optimum device at weight ratio of 1:3 exhibited short circuit current density of 3.95±0.10mAcm−2, open circuit voltage of 0.53±0.03V, fill factor of 0.50±0.03, and power conversion efficiency of 1.02±0.07 %.
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