Open Access System for Information Sharing

Login Library

 

Article
Cited 0 time in webofscience Cited 3 time in scopus
Metadata Downloads

Bandgap Tailored Nonfullerene Acceptors for Low-Energy-Loss Near-Infrared Organic Photovoltaics

Title
Bandgap Tailored Nonfullerene Acceptors for Low-Energy-Loss Near-Infrared Organic Photovoltaics
Authors
이재원Song, SeyeongHuang, JianfeiDu, Zhifang이한솔Zhu, ZiyueKo, Seo-JinNguyen Thuc-QuyenKim, Jin YoungCHO, KIL WONBazan, Guillermo C.
Date Issued
Mar-2020
Publisher
AMER CHEMICAL SOC
Abstract
A series of A−π–D−π–A-type nonfullerene acceptors (NFAs) was designed and synthesized with the goal of optimizing light absorption and energy losses in near-infrared (NIR) organic solar cells (OSCs) principally through the use of side-chain engineering. Specific molecules include p-IO1, o-IO1, p-IO2, and o-IO2 with optical bandgaps of 1.34, 1.28, 1.24, and 1.20 eV, respectively. Manipulating the optoelectronic properties and intermolecular organization by substituting bulky phenylhexyl (p-) for linear octyl chains (o-) and replacing bisalkoxy (-O2) with alkyl-alkoxy combination (-O1) allows one to target energy bandgaps and achieve a favorable bulk heterojunction morphology when in the presence of the donor polymer PTB7-Th. Solar cells based on o-IO1 and PTB7-Th exhibit an optimal power conversion efficiency of 13.1%. The excellent photovoltaic performance obtained with the o-IO1 acceptor can be attributed to a short-circuit current of 26.3 mA cm–2 and energy losses on the order of 0.54 eV. These results further highlight how side-chain engineering is a straightforward strategy to tune the molecular design of n-type molecular semiconductors, particularly in the context of NIR high-efficiency organic photovoltaics.
URI
http://oasis.postech.ac.kr/handle/2014.oak/102646
ISSN
2639-4979
Article Type
Article
Citation
Acs Materials Letters, vol. 2, no. 4, page. 395 - 402, 2020-03
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

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

Related Researcher

Researcher

조길원CHO, KIL WON
Dept. of Chemical Enginrg
Read more

Views & Downloads

Browse