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Yang, Changduk
Advanced Tech-Optoelectronic Materials Synthesis Lab (ATOMS)
Research Interests
  • Optoelectronic materials synthesis/organic electronics, functionalization of carbonaceous solids, advanced materials chemistry, macromolecular chemistry

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High electron mobility fluorinated indacenodithiophene small molecule acceptors for organic solar cells

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Title
High electron mobility fluorinated indacenodithiophene small molecule acceptors for organic solar cells
Author
Pan, FeiLi, XiaojunBai, SongLiu, TianhaoWei, XianLi, YingfenChen, ShanshanYang, ChangdukChen, XiwenLv, MenglanLi, Yongfang
Issue Date
2021-03
Publisher
ELSEVIER SCIENCE INC
Citation
CHINESE CHEMICAL LETTERS, v.32, no.3, pp.1257 - 1262
Abstract
Indacenodithiophene (IDT) derivatives are kinds of the most representative and widely used cores of small molecule acceptors (SMAs) in organic solar cells (OSCs). Here we systematically investigate the influence of end-group fluorination density and position on the photovoltaic properties of the IDT-based SMAs IDIC-nF (n = 0, 2, 4). The absorption edge of IDIC-nF red-shifts with the pi-pi stacking and crystallinity improvement, and their electronic energy levels downshift with increasing n. Due to the advantages of J(sc) and FF as well as acceptable V-oc, the difluorinated IDIC-2F acceptor based OSCs achieve the highest power conversion efficiency (PCE) of 13%, better than the OSC devices based on IDIC and IDIC-4F as acceptors. And the photovoltaic performance of the PTQ10: IDIC-2F OSCs is insensitive to the active layer thickness: PCE still keep high values of 12.00% and 11.46% for the devices with active layer thickness of 80 and 354 nm, respectively. This work verifies that fine and delicate modulation of the SMAs molecular structure could optimize photovoltaic performance of the corresponding OSCs. Meanwhile, the thickness-insensitivity property of the OSCs has potential for large-scale and printable fabrication technology. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
URI
https://scholarworks.unist.ac.kr/handle/201301/53016
URL
https://www.sciencedirect.com/science/article/pii/S1001841720305039?via%3Dihub
DOI
10.1016/j.cclet.2020.08.051
ISSN
1001-8417
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