Configurational Isomerization-Induced Orientation Switching: Non-Fused Ring Dipodal Phosphonic Acids as Hole-Extraction Layers for Efficient Organic Solar Cells

Authors
Zhang, LeiWang, YuxingWen, JunjieHuang, YifanGao, JiaxinDuan, YuxinPark, SoohyungShin, WoojinMa, ZaifeiLiu, MiaoCho, Sang WanPark, YeonjuJung, Young MeeLee, HyunbokLiu, WenxuLiu, Yao
Issue Date
2024-08
Publisher
John Wiley & Sons Ltd.
Citation
Angewandte Chemie International Edition
Abstract
Phosphonic acid (PA) self-assembled molecules have recently emerged as efficient hole-extraction layers (HELs) for organic solar cells (OSCs). However, the structural effects of PAs on their self-assembly behaviors on indium tin oxide (ITO) and thus photovoltaic performance remain obscure. Herein, we present a novel class of PAs, namely "non-fused ring dipodal phosphonic acids" (NFR-DPAs), featuring simple and malleable non-fused ring backbones and dipodal phosphonic acid anchoring groups. The efficacy of configurational isomerism in modulating the photoelectronic properties and switching molecular orientation of PAs atop electrodes results in distinct substrate surface energy and electronic characteristics. The NFR-DPA with linear (C2h symmetry) and brominated backbone exhibits favorable face-on orientation and enhanced work function modification capability compared to its angular (C2v symmetry) and non-brominated counterparts. This makes it versatile HELs in mitigating interfacial resistance for energy barrier-free hole collection, and affording optimal active layer morphology, which results in an impressive efficiency of 19.11 % with a low voltage loss of 0.52 V for binary OSC devices and an excellent efficiency of 19.66 % for ternary OSC devices. This study presents a new dimension to design PA-based HELs for high-performance OSCs.
Keywords
INDIUM-TIN OXIDE; MOLECULAR-ORIENTATION; MONOLAYERS; SURFACE; ENERGY; PHOTOVOLTAICS; ELECTRODES; ACCEPTORS; non-fused ring; dipodal phosphonic acid; configurational effect; hole-extraction layer; organic solar cells
ISSN
1433-7851
URI
https://pubs.kist.re.kr/handle/201004/150999
DOI
10.1002/anie.202408960
Appears in Collections:
KIST Article > 2024
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

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

BROWSE