Revealing aggregation of non-fullerene acceptors in intermixed phase by ultraviolet-visible absorption spectroscopy

Jin Fang; Zhen Wang; Yiyao Chen; Qing Zhang; Jianqi Zhang; Lingyun Zhu; Maojie Zhang; Zheng Cui; Zhixiang Wei; Harald Ade; Chang Qi Ma

doi:10.1016/j.xcrp.2022.100983

Revealing aggregation of non-fullerene acceptors in intermixed phase by ultraviolet-visible absorption spectroscopy

Jin Fang^*
, Zhen Wang
, Yiyao Chen
, Qing Zhang
, Jianqi Zhang
, Lingyun Zhu
, Maojie Zhang
, Zheng Cui
, Zhixiang Wei^*
, Harald Ade^*
, Chang Qi Ma^*

^*Corresponding author for this work

CAS - Suzhou Institute of Nano-Tech and Nano-Bionics
North Carolina State University
National Center for Nanoscience and Technology
Soochow University

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Non-fullerene acceptor (NFA) aggregation is crucial in determining bulk-heterojunction (BHJ) organic photovoltaic (OPV) performance. However, it is still a big challenge to characterize the nanostructure of NFAs in the disordered donor-acceptor intermixed phase. Here, we demonstrate a method to characterize NFA aggregation and composition in the intermixed phase by measuring NFA concentration-dependent ultraviolet-visible (UV-vis) absorption spectroscopy of BHJ films. In various polymer:NFA films, an absorption shift as a function of increasing molecular concentration (ASIMC) phenomenon is observed, and different NFA aggregation behaviors can be distinguished. The ASIMC method was then applied to study the influence of processing conditions on the NFA concentration in the intermixed phase of devices to establish a correlation with device efficiency. The current work provides a feasible tool to study the nanostructure of NFAs in the complex polymer matrix and to understand the variations in the NFA concentration in the intermixed phase under non-equilibrium conditions.

Original language	English
Article number	100983
Journal	Cell Reports Physical Science
Volume	3
Issue number	7
DOIs	https://doi.org/10.1016/j.xcrp.2022.100983
State	Published - 20 Jul 2022
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

bulk-heterojunction
intermixed phase
molecular aggregation
molecular interaction
non-equilibrium state
organic photovoltaics
phase separation

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10.1016/j.xcrp.2022.100983

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@article{962a42e862584abe8417c523ab7164f3,

title = "Revealing aggregation of non-fullerene acceptors in intermixed phase by ultraviolet-visible absorption spectroscopy",

abstract = "Non-fullerene acceptor (NFA) aggregation is crucial in determining bulk-heterojunction (BHJ) organic photovoltaic (OPV) performance. However, it is still a big challenge to characterize the nanostructure of NFAs in the disordered donor-acceptor intermixed phase. Here, we demonstrate a method to characterize NFA aggregation and composition in the intermixed phase by measuring NFA concentration-dependent ultraviolet-visible (UV-vis) absorption spectroscopy of BHJ films. In various polymer:NFA films, an absorption shift as a function of increasing molecular concentration (ASIMC) phenomenon is observed, and different NFA aggregation behaviors can be distinguished. The ASIMC method was then applied to study the influence of processing conditions on the NFA concentration in the intermixed phase of devices to establish a correlation with device efficiency. The current work provides a feasible tool to study the nanostructure of NFAs in the complex polymer matrix and to understand the variations in the NFA concentration in the intermixed phase under non-equilibrium conditions.",

keywords = "bulk-heterojunction, intermixed phase, molecular aggregation, molecular interaction, non-equilibrium state, organic photovoltaics, phase separation",

author = "Jin Fang and Zhen Wang and Yiyao Chen and Qing Zhang and Jianqi Zhang and Lingyun Zhu and Maojie Zhang and Zheng Cui and Zhixiang Wei and Harald Ade and Ma, \{Chang Qi\}",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s)",

year = "2022",

month = jul,

day = "20",

doi = "10.1016/j.xcrp.2022.100983",

language = "英语",

volume = "3",

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TY - JOUR

T1 - Revealing aggregation of non-fullerene acceptors in intermixed phase by ultraviolet-visible absorption spectroscopy

AU - Fang, Jin

AU - Wang, Zhen

AU - Chen, Yiyao

AU - Zhang, Qing

AU - Zhang, Jianqi

AU - Zhu, Lingyun

AU - Zhang, Maojie

AU - Cui, Zheng

AU - Wei, Zhixiang

AU - Ade, Harald

AU - Ma, Chang Qi

PY - 2022/7/20

Y1 - 2022/7/20

N2 - Non-fullerene acceptor (NFA) aggregation is crucial in determining bulk-heterojunction (BHJ) organic photovoltaic (OPV) performance. However, it is still a big challenge to characterize the nanostructure of NFAs in the disordered donor-acceptor intermixed phase. Here, we demonstrate a method to characterize NFA aggregation and composition in the intermixed phase by measuring NFA concentration-dependent ultraviolet-visible (UV-vis) absorption spectroscopy of BHJ films. In various polymer:NFA films, an absorption shift as a function of increasing molecular concentration (ASIMC) phenomenon is observed, and different NFA aggregation behaviors can be distinguished. The ASIMC method was then applied to study the influence of processing conditions on the NFA concentration in the intermixed phase of devices to establish a correlation with device efficiency. The current work provides a feasible tool to study the nanostructure of NFAs in the complex polymer matrix and to understand the variations in the NFA concentration in the intermixed phase under non-equilibrium conditions.

AB - Non-fullerene acceptor (NFA) aggregation is crucial in determining bulk-heterojunction (BHJ) organic photovoltaic (OPV) performance. However, it is still a big challenge to characterize the nanostructure of NFAs in the disordered donor-acceptor intermixed phase. Here, we demonstrate a method to characterize NFA aggregation and composition in the intermixed phase by measuring NFA concentration-dependent ultraviolet-visible (UV-vis) absorption spectroscopy of BHJ films. In various polymer:NFA films, an absorption shift as a function of increasing molecular concentration (ASIMC) phenomenon is observed, and different NFA aggregation behaviors can be distinguished. The ASIMC method was then applied to study the influence of processing conditions on the NFA concentration in the intermixed phase of devices to establish a correlation with device efficiency. The current work provides a feasible tool to study the nanostructure of NFAs in the complex polymer matrix and to understand the variations in the NFA concentration in the intermixed phase under non-equilibrium conditions.

KW - bulk-heterojunction

KW - intermixed phase

KW - molecular aggregation

KW - molecular interaction

KW - non-equilibrium state

KW - organic photovoltaics

KW - phase separation

UR - https://www.scopus.com/pages/publications/85134731479

U2 - 10.1016/j.xcrp.2022.100983

DO - 10.1016/j.xcrp.2022.100983

M3 - 文章

AN - SCOPUS:85134731479

SN - 2666-3864

VL - 3

JO - Cell Reports Physical Science

JF - Cell Reports Physical Science

IS - 7

M1 - 100983

ER -

Revealing aggregation of non-fullerene acceptors in intermixed phase by ultraviolet-visible absorption spectroscopy

Abstract

UN SDGs

Keywords

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