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Processing additives for improved efficiency from bulk heterojunction solar cells.

Lee, Jae Kwan and Ma, Wan Li and Brabec, Christoph J. and Yuen, Jonathan and Moon, Ji Sun and Kim, Jin Young and Lee, Kwanghee and Bazan, Guillermo C. and Heeger, Alan J. (2008) Processing additives for improved efficiency from bulk heterojunction solar cells. Journal of the American Chemical Society, 130 (11). pp. 3619-23. ISSN 1520-5126

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Abstract

Two criteria for processing additives introduced to control the morphology of bulk heterojunction (BHJ) materials for use in solar cells have been identified: (i) selective (differential) solubility of the fullerene component and (ii) higher boiling point than the host solvent. Using these criteria, we have investigated the class of 1,8-di(R)octanes with various functional groups (R) as processing additives for BHJ solar cells. Control of the BHJ morphology by selective solubility of the fullerene component is demonstrated using these high boiling point processing additives. The best results are obtained with R = Iodine (I). Using 1,8-diiodooctane as the processing additive, the efficiency of the BHJ solar cells was improved from 3.4% (for the reference device) to 5.1%.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Photonics
ID Code:86
Deposited By:Lesley Tobin
Deposited On:29 Oct 2008 16:46
Last Modified:12 Feb 2009 15:56

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