Solvent mixtures for improving device efficiency of polymerphotovoltaic devices

In this work, we used solvent mixtures, consisting of 1-chloronaphthalene (Cl-naph), one solvent with a high boiling point, and o -dichlorobenzene, to prepare the polymer films for polymer photovoltaic devices. Because of the lower vapor pressure of the solvent mixtures, the polymer films dried slow...

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Published in:Applied physics letters 2008-03, Vol.92 (10), p.103316-103316-3
Main Authors: Chen, Fang-Chung, Tseng, Hsin-Chen, Ko, Chu-Jung
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Summary:In this work, we used solvent mixtures, consisting of 1-chloronaphthalene (Cl-naph), one solvent with a high boiling point, and o -dichlorobenzene, to prepare the polymer films for polymer photovoltaic devices. Because of the lower vapor pressure of the solvent mixtures, the polymer films dried slower. With higher Cl-naph concentration in the organic solvent, the polymer chains had longer time to self-organize themselves. As a result, the higher degree of crystalline led to lower device series resistance, thereby increasing the performance of the photovoltaic devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2898153