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Browse Journals & Magazines > Applied Physics Letters ...> Volume:97 Issue:13 Help

Efficiency enhancement in small molecule bulk heterojunction organic solar cells via additive

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4 Author(s)
Fan, Haijun ; Shang, Huixia ; Li, YongFang ; Zhan, Xiaowei

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3491268 

Improved performance of small molecule bulk heterojunction (BHJ) organic solar cells based on 4,7-bis(2-triphenylamino-3-dodecyl-thiophene-5-yl)-benzo[c][1,2,5]thiadiazole (TTBTT)/PC71BM (1:3, w/w) blend has been obtained by using 1,8-octanedithiol (ODT) as a processing additive. Based on the analysis of absorption spectrum, charge transport, and film morphology, the 30% enhancement in power conversion efficiency (PCE) via 1% ODT addition is attributed to aggregated domain formation, enhanced absorption, improved hole mobility, and more balanced charge transport. Finally, a PCE as high as 2.86% was achieved, which is among the top reported for solution-processed small molecule BHJ organic solar cells.

Published in:
Applied Physics Letters  (Volume:97 ,  Issue: 13 )

Date of Publication: Sep 2010

Page(s):
133302 - 133302-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.3491268
Product Type:
Journals & Magazines
Date of Current Version :
30 September 2010
Issue Date :
Sep 2010

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