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Title of Journal: J Mater Sci Mater Electron

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Abbravation: Journal of Materials Science: Materials in Electronics

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Springer US

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1573-482X

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Influence of organic salt concentration on the per

Authors: Nasehah Syamin Sabri Chi Chin Yap Muhammad Yahaya Muhamad Mat Salleh
Publish Date: 2013/02/01
Volume: 24, Issue: 7, Pages: 2183-2188
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Abstract

The effect of organic salt on the performance of bulk heterojunction organic solar cell was investigated by varying the concentration of tetrabutylammonium hexafluorophosphate TBAPF6 Organic solar cells based on TBAPF6blended poly2methoxy52ethylhexyloxy14phenylenevinylene MEHPPV 66phenylC61 butyric acid methyl ester PCBM thin films with aluminium Al as cathode have been fabricated on ITO substrates The MEHPPVPCBM films with different concentrations of TBAPF6 10 20 30 and 40 wt with respect to MEHPPV were deposited onto the ITO by spin coating technique followed by deposition of Al using electron gun evaporation technique to build the devices Experimental results showed that the short circuit current density and open circuit voltage improved with increasing of TBAPF6 concentration up to 20 wt since more dissociated ions accumulated at the photoactive layerelectrode interfaces resulted in higher built in electric field However the short circuit current density and open circuit voltage started to decrease at TBAPF6 concentration of 30 wt indicating higher charge recombination as a result of agglomeration of TBAPF6This work was carried out with the financial support of Malaysian Ministry of Higher Education MOHE under UKMST07FRGS02372010 research grant The first author would like to acknowledge Universiti Kebangsaan Malaysia for the Research University Fellowship

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