Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

D-A-D-A-D push pull organic small molecules based on 5,10-dihydroindolo[3,2-b]indole (DINI) central core donor for solution processed bulk heterojunction solar cells

Authors
Sim, JangkeunDo, KwangseokSong, KihyoungSharma, AbhishekBiswas, S.Sharma, Ganesh D.Ko, Jaejung
Issue Date
Mar-2016
Publisher
ELSEVIER SCIENCE BV
Keywords
D-A-D-A-D small molecules; Bulk heterojunction solar cell; Two step annealing; Power conversion efficiency
Citation
ORGANIC ELECTRONICS, v.30, pp 122 - 130
Pages
9
Indexed
SCI
SCIE
SCOPUS
Journal Title
ORGANIC ELECTRONICS
Volume
30
Start Page
122
End Page
130
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/89393
DOI
10.1016/j.orgel.2015.11.036
ISSN
1566-1199
1878-5530
Abstract
Two D-A-D-A-D small molecules based on same 5,10-dihydroindolo [3,2-b]indole central donor core and different benzothiadiazole (BT) and fluorine substituted BT (FBT) acceptor units, denoted as p-DINI-(BTTh3)(2) (1) and p-DINI-(FBTTTh3)(2) (2), respectively were synthesized and their optical and electrochemical properties were investigated. These molecules were applied as donor along with PC71BM as electron acceptor for the fabrication of solution processed bulk heterojunction organic solar cells. The solar cells prepared from the optimized active blended layer (1:2) cast from dichlorobenzene (DCB) showed overall power conversion efficiency (PCE) of 2.02% and 2.70% for 1 and 2, respectively as donor. The higher PCE of 2 as compared to 1 is attributed to the higher hole mobility and broader IPCE spectra. In order to improve the PCE we have employed a two step treatment of active layer i.e. solvent vapor annealing after thermal annealing (SVA-TA) and the PCE has been enhanced up to 4.14% and 5.27% for optimized 1:PC71BM and 2:PC71BM active layers, respectively. The improvement in the PCE has been resulted from the improvement in the balanced charge transport and better crystallinity of the donor in the blended active layer. (C) 2015 Elsevier B.V. All rights reserved.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Science and Technology > Department of Advanced Materials Chemistry > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Altmetrics

Total Views & Downloads

BROWSE