Processing Additives for Improved Efficiency from Bulk Heterojunction Solar Cells
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- 作者：Jae Kwan Lee ; Wan Li Ma ; Christoph J. Brabec ; Jonathan Yuen ; Ji Sun Moon ; Jin Young Kim ; Kwanghee Lee ; Guillermo C. Bazan ; Alan J. Heeger
- 刊名：Journal of the American Chemical Society
- 出版年：2008
- 出版时间：March 19, 2008
- 年：2008
- 卷：130
- 期：11
- 页码：3619 - 3623
- 全文大小：875K
- 年卷期：v.130,no.11(March 19, 2008)
- ISSN：1520-5126
文摘
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 fullerenecomponent and (ii) higher boiling point than the host solvent. Using these criteria, we have investigatedthe 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 usingthese high boiling point processing additives. The best results are obtained with R = Iodine (I). Using1,8-diiodooctane as the processing additive, the efficiency of the BHJ solar cells was improved from 3.4%(for the reference device) to 5.1%.