File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

양창덕

Yang, Changduk
Advanced Tech-Optoelectronic Materials Synthesis Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Feasible D1-A-D2-A Random Copolymers for Simultaneous High-Performance Fullerene and Nonfullerene Solar Cells

Author(s)
Jeong, MingyuChen, ShanshanLee, Sang MyeonWang, ZhiweiYang, YankangZhang, Zhi-GuoZhang, ChunfengXiao, MinLi, YongfangYang, Changduk
Issued Date
2018-03
DOI
10.1002/aenm.201702166
URI
https://scholarworks.unist.ac.kr/handle/201301/22810
Fulltext
http://onlinelibrary.wiley.com/doi/10.1002/aenm.201702166/abstract
Citation
ADVANCED ENERGY MATERIALS, v.8, no.7, pp.1702166
Abstract
A series of PBDB-TTn random donor copolymers is synthesized, consisting of an electron-deficient benzo[1,2-c:4,5-c]dithiophene-4,8-dione (BDD) unit and different ratios of two electron-rich benzo[1,2-b:4,5-b]dithiophene (BDT) and thieno[3,2-b]thiophene (TT) units, with intention to modulate the intrachain and/or interchain interactions and ultimately bulk-heterojunction morphology evolution. A comparative study using 4 x 2 polymer solar cell (PSC) performance maps and each of the [6,6]-phenyl-C-71-butyric acid methyl ester (PC71BM) and the fused-aromatic-ring-based molecule (m-ITIC) acceptors are carried out. Given the similarities in their absorption ranges and energy levels, the PBDB-TTn copolymers clearly reveal a change in the absorption coefficients upon optimization of the BDT to TT ratio in the backbone. Among the given acceptor combination sets, superior performances are observed in the case of PBDB-TT5 blended with PC71BM (8.34 +/- 0.10%) or m-ITIC (11.10 +/- 0.08%), and the dominant factors causing power conversion efficiency differences in them are found to be distinctly different. For example, the performances of PC71BM-based PSCs are governed by size and population of face-on crystallites, while intermixed morphology without the formation of large phase-separated aggregates is the key factor for achieving high-performance m-ITIC-based PSCs. This study presents a new sketch of structure-morphology-performance relationships for fullerene- versus nonfullerene-based PSCs.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
1614-6832
Keyword (Author)
compatibilityfullerene solar cellsnonfullerene solar cellsrandom copolymerstructure-property relationship
Keyword
POWER CONVERSION EFFICIENCYPOLYMER PHOTOVOLTAIC CELLSELECTRON-ACCEPTORSMALL-MOLECULEORGANIC PHOTOVOLTAICSINTENSITY DEPENDENCEPERYLENE DIIMIDEDESIGNDONORAGGREGATION

qrcode

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