Effect of Side Chain of Oligothiophene Derivatives on Bulk Heterojunction Structure in Organic Photovoltaic Devices

The effect of the molecular structure on photovoltaic performance was investigated by comparing two types of active layers. One is an active layer formed by sexithiophene (6T) and C sub(60) molecules which don't have side chains. Another one is an active layer formed by a, omega -bis(2-hexyldec...

Full description

Saved in:
Bibliographic Details
Published in:Advances in materials physics and chemistry 2013-06, Vol.3 (2), p.185-190
Main Authors: Sasaki, Kenichi, Shibata, Yosei, Lu, Ming, Yoshida, Yuji, Azumi, Reiko, Ueda, Yasukiyo
Format: Article
Language:English
Subjects:
Active control
Buckminsterfullerene
Chains
Crystallization
Fullerenes
Molecular structure
Photovoltaic cells
Solar cells
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of the molecular structure on photovoltaic performance was investigated by comparing two types of active layers. One is an active layer formed by sexithiophene (6T) and C sub(60) molecules which don't have side chains. Another one is an active layer formed by a, omega -bis(2-hexyldecyl)sexit hiophene (BHD6T) and [6,6]-phenyl-C sub(61)-butyric acid methyl ester (PCBM) molecules which have side chains. The 6T:C sub(60) active layer exhibited an excessive crystallization of 6T, which led to the low photovoltaic performance. In the BHD6T:PCBM active layer, the crystallization of BHD6T was suppressed. The crystallization of BHD6T was also easily controlled by thermal annealing, which led to improved photovoltaic performance.
ISSN:2162-531X
2162-5328
DOI:10.4236/ampc.2013.32026