Detailed Information

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

Facile Synthesis of Polycyclic Aromatic Hydrocarbon (PAH)-Based Acceptors with Fine-Tuned Optoelectronic Properties: Toward Efficient Additive-Free Nonfullerene Organic Solar Cells

Authors
Wang, YangLiu, BinKoh, Chang WooZhou, XinSun, HuiliangYu, JianweiYang, KunWang, HangLiao, QiaoganWoo, Han YoungGuo, Xugang
Issue Date
6월-2019
Publisher
WILEY-V C H VERLAG GMBH
Keywords
additive-free; low-cost; nonfullerene organic solar cells; polycyclic aromatic hydrocarbon; structure-property relationship
Citation
ADVANCED ENERGY MATERIALS, v.9, no.24
Indexed
SCIE
SCOPUS
Journal Title
ADVANCED ENERGY MATERIALS
Volume
9
Number
24
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/65227
DOI
10.1002/aenm.201803976
ISSN
1614-6832
Abstract
A series of polycyclic aromatic hydrocarbons (PAHs) with extended pi-conjugated cores (from naphthalene, anthracene, pyrene, to perylene) are incorporated into nonfullerene acceptors for the first time. Four different fused-ring electron acceptors (FREAs), i.e., DTN-IC-2Ph, DTA-IC-3Ph, DTP-IC-4Ph, and DTPy-IC-5Ph, are prepared via simple and facile synthetic procedures, yielding a remarkable platform to study the structure-property relationship for nonfullerene solar cells. With the PAH core being extended systematically, the gradually redshifted absorption with enhanced molar extinction coefficient (epsilon) is realized, the energy level of the highest occupied molecular orbital is up-shifted, and the electron mobility is greatly enhanced. Meanwhile, the solubility decreases and the molecular packing becomes strengthened. As a result, with an optimized combination of these characteristics, DTP-IC-4Ph attains good solubility, high molar extinction coefficient, complementary absorption, suitable morphology, well-matched energy levels, as well as efficient charge dissociation and transport in blend film. Consequently, the DTP-IC-4Ph-based solar cells with a donor polymer, poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b ']dithiophene))-alt-(5,5-(1 ',3 '-di-2-thienyl-5 ',7 '-bis(2-ethylhexyl)benzo[1 ',2 '-c:4 ',5 '-c ']dithiophene-4,8-dione))] (PBDB-T) exhibit a promising power conversion efficiency of 10.37% without any additives, which is close to the best performance achieved in additive-free nonfullerene solar cells (NFSCs). The results demonstrate that the PAH building blocks have great potential for the construction of novel FREAs for efficient additive-free NFSCs.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Science > Department of Chemistry > 1. Journal Articles

qrcode

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

Altmetrics

Total Views & Downloads

BROWSE