Effect of Molecular Weight and Processing Additive on the Performance of Low Bandgap Polymer Solar Cells

In this work, we synthesized a low bandgap polymer polysilole（-2,6-diyl-alt-5-octylthieno[3,4-c]pyrrole-4,6- dione） （PDTSTPD） with different molecular weights （Mn）. The devices based on PDTSTPD/PC71BM composite are prepared and the dependence of power conversion efficiency （PCE） of the devices on th...

Full description

Saved in:
Bibliographic Details
Published inChinese journal of chemistry Vol. 30; no. 9; pp. 2052 - 2058
Main Author 赵晓礼 唐浩为 杨大磊 李慧 徐文涛 尹丽 杨小牛
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 01.09.2012
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
Subjects
bulk-heterojunction
low band gap
molecular weights
Polymers
semiconducting polymers
Solar cells
分子量
功率转换效率
加工助剂
太阳能电池
带隙
性能
聚合物
设备使用
Online AccessGet full text
ISSN1001-604X
1614-7065
DOI10.1002/cjoc.201200641

Cover

More Information
Summary:In this work, we synthesized a low bandgap polymer polysilole（-2,6-diyl-alt-5-octylthieno[3,4-c]pyrrole-4,6- dione） （PDTSTPD） with different molecular weights （Mn）. The devices based on PDTSTPD/PC71BM composite are prepared and the dependence of power conversion efficiency （PCE） of the devices on the M,1 of conjugated poly- mers is addressed. We found the hole mobility of PDTSTPD is dependent on the Mn of the polymer, which should be the main reason contributing to the drastic difference of device performance, i.e. the PCE of the device using 10 kDa polymer is only 0.52%, in contrast to 2.3% for 24 kDa polymer device. This PCE data is then further improved to 5.0% via using 1,8-diiodoctane as processing additive to achieve an optimized morphology for the photoactive layer with an appropriate length-scale of phase separation for both exciton dissociation and charge transportation.
Bibliography:31-1547/O6
In this work, we synthesized a low bandgap polymer polysilole（-2,6-diyl-alt-5-octylthieno[3,4-c]pyrrole-4,6- dione） （PDTSTPD） with different molecular weights （Mn）. The devices based on PDTSTPD/PC71BM composite are prepared and the dependence of power conversion efficiency （PCE） of the devices on the M,1 of conjugated poly- mers is addressed. We found the hole mobility of PDTSTPD is dependent on the Mn of the polymer, which should be the main reason contributing to the drastic difference of device performance, i.e. the PCE of the device using 10 kDa polymer is only 0.52%, in contrast to 2.3% for 24 kDa polymer device. This PCE data is then further improved to 5.0% via using 1,8-diiodoctane as processing additive to achieve an optimized morphology for the photoactive layer with an appropriate length-scale of phase separation for both exciton dissociation and charge transportation.
bulk-heterojunction, molecular weights, low band gap, semiconducting polymers, solar cells
Zhao, Xiaoli Tang, Haowei Yang, Dalei Li, Hui XU, Wentao Yin, Li Yang, Xiaoniu （a Polymer Composites Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Scienees, Renmin St. 5625, Changchun, Jilin 130022, China b State Key Laboratory of Polymer Physics and Chemistry, Changchun institute of Applied Chemistry, Chinese Academy of Sciences, Renmin St. 5625, Changchun, Jilin 130022, China c Graduate School of the Chinese Academy of Sciences, Beijing 100049, China d Changchun University of Technology, Changchun, Jilin 130012, China）
Hi-Tech Research and Development Program (863) of China - No. 2011AA050524
the National Natural Science Foundation of China - No. 20874100, 20925415, 20990233 and 50921062
the Solar Energy Initiative of the Chinese Academy of Sciences - No. KGCX2-YW-399+9
ark:/67375/WNG-FLMHN03R-T
ArticleID:CJOC201200641
istex:CBD5390E4D201E2071BED3F55BF65382C0CC1774
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.201200641