Origin of the efficiency improvement in all-polymer solar cellsupon annealing

The origin of the enhanced efficiency upon annealing in solar cells based on blends of poly[2-methoxy-5-( 3 ′ , 7 ′ -dimethyloctyloxy)-1,4-phenylene vinylene] and poly{9,9-dioctylfluorene-2,7-diyl-alt-1,4-bis[2-(5-thienyl)-1-cyanovinyl]-2-methoxy-5-(3,7-dimethyl-octyloxy)benzene} is investigated. Cu...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2007-08, Vol.91 (7), p.073518-073518-3
Main Authors: Mandoc, M. M., Veurman, W., Sweelssen, J., Koetse, M. M., Blom, P. W. M.
Format: Article
Language:
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The origin of the enhanced efficiency upon annealing in solar cells based on blends of poly[2-methoxy-5-( 3 ′ , 7 ′ -dimethyloctyloxy)-1,4-phenylene vinylene] and poly{9,9-dioctylfluorene-2,7-diyl-alt-1,4-bis[2-(5-thienyl)-1-cyanovinyl]-2-methoxy-5-(3,7-dimethyl-octyloxy)benzene} is investigated. Current-voltage measurements on solar cells and single-carrier diodes reveal that the electron and hole transport is not improved for thermally treated devices. From the analysis of the photocurrent, the authors show that the dissociation efficiency of the bound electron-hole pairs increases upon annealing, due to an increase of the initial electron-hole separation distance.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2772185