Processing Additives for Improved Efficiency from Bulk Heterojunction Solar Cells

Overview

Journal J Am Chem Soc

Publisher American Chemical Society

Specialty Chemistry

Date 2008 Feb 22

PMID 18288842

Citations 67

Authors

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

Affiliations

Soon will be listed here.

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%.

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