Progress in organic photovoltaics based on green solvents: from solubility enhancement to morphology optimization

Kong, Xiangyue; He, Tian; Qiu, Huayu; Zhan, Lingling; Yin, Shouchun

doi:10.1039/d3cc04412b

Cited by 6 publications

(2 citation statements)

References 104 publications

(163 reference statements)

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“…The aim of this paper is to investigate the spectroscopic and morphological characteristics of non-fullerene acceptor FNTz-T eh -FA and its blends with P3HT. We are particularly interested in the effects of altering processing solvent, noting both the push toward “greener” solvents in the community but also the reported observations of substantial effects on morphology and charge carrier properties. , We use both the conventional, chlorinated processing solvents chlorobenzene (CB) and chloroform (CF) as well as the non-halogenated tetrahydrofuran (THF) and o -xylene (XY), which typically show poorer yields and device performance due to reduced solubility. , We also utilize Raman spectroscopy and computational modeling to demonstrate that FNTz-T eh -FA is non-planar and forms multiple conformations when blended with P3HT in a film. This non-planarity creates a dispersive environment irrespective of processing solvent and leads to high tolerance to morphological variation, enabling a relative invariance in charge carrier decay dynamics.…”

Section: Introductionmentioning

confidence: 99%

“…We are particularly interested in the effects of altering processing solvent, noting both the push toward “greener” solvents in the community but also the reported observations of substantial effects on morphology and charge carrier properties. 17 , 18 We use both the conventional, chlorinated processing solvents chlorobenzene (CB) and chloroform (CF) as well as the non-halogenated tetrahydrofuran (THF) and o -xylene (XY), which typically show poorer yields and device performance due to reduced solubility. 19 , 20 We also utilize Raman spectroscopy and computational modeling to demonstrate that FNTz-T eh -FA is non-planar and forms multiple conformations when blended with P3HT in a film.…”

Section: Introductionmentioning

confidence: 99%

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Invariant Charge Carrier Dynamics Using a Non-Planar Non-Fullerene Acceptor across Multiple Processing Solvents

Gonev,

Jones,

Chang

et al. 2024

J. Phys. Chem. C

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Conventional non-fullerene acceptors (NFAs) typically have planar structures that can enable improved electron mobility and produce more efficient organic photovoltaic devices. A relatively simple A-D-A′-D-A type NFA specifically designed to match with poly(3-hexylthiophene-2,5-diyl) (P3HT) for green-absorbing agrivoltaic applications has been examined using a variety of techniques: microsecond transient absorption spectroscopy, atomic force microscopy, and photoluminescence. Relatively invariant charge carrier decay dynamics are observed in the blend films across a variety of processing solvents. Raman spectroscopy in conjunction with computational studies reveals that this NFA is non-planar and that multiple conformations are present in films, while preserving the crystalline nature of P3HT. The non-planarity of the NFA therefore creates a dispersive acceptor environment, irrespective of processing solvent, and this leads to the observed relative invariance in charge carrier decay dynamics and high tolerance to morphological variation. The findings presented in this work highlight the potential of non-planar materials as acceptors in organic photovoltaic devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Invariant Charge Carrier Dynamics Using a Non-Planar Non-Fullerene Acceptor across Multiple Processing Solvents

Gonev,

Jones,

Chang

et al. 2024

J. Phys. Chem. C

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The Multi‐Functional Third Acceptor Realizes the Synergistic Improvement in Photovoltaic Parameters and the High‐Ratio Tolerance of Ternary Organic Photovoltaics

Liu,

Zhan,

et al. 2024

Advanced Science

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The ternary strategy proves effective for breakthroughs in organic photovoltaics (OPVs). Elevating three photovoltaic parameters synergistically, especially the proportion‐insensitive third component, is crucial for efficient ternary devices. This work introduces a molecular design strategy by comprehensively analyzing asymmetric end groups, side‐chain engineering, and halogenation to explore the outstanding optoelectronic properties of the proportion‐insensitive third component in efficient ternary systems. Three asymmetric non‐fullerene acceptors (BTP‐SA1, BTP‐SA2, and BTP‐SA3) are synthesized based on the Y6 framework and incorporated as the third component into the D18:Y6 binary system. BTP‐SA3, featuring asymmetric terminal (difluoro‐indone and dichloride‐cyanoindone terminal), with branched alkyl side chains, exhibited high open‐circuit voltage (VOC), balanced crystallinity and compatibility, achieving synergistic enhancements in VOC (0.862 V), short circuit‐current density (JSC, 27.52 mA cm−2), fill fact (FF, 81.01%), and power convert efficiency (PCE, 19.19%). Device based on D18/Y6:BTP‐SA3 (layer‐by‐layer processed) reached a high efficiency of 19.36%, demonstrating a high tolerance for BTP‐SA3 (10–50%). This work provides novel insights into optimizing OPVs performances in multi‐component systems and designing components with enhanced tolerance.

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Recent development in solid additives enables high-performance organic solar cells

Memon,

Deng,

2024

EnergyChem

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Progress in organic photovoltaics based on green solvents: from solubility enhancement to morphology optimization

Abstract: Solution-processed organic photovoltaics (OPVs) is one of the most promising photovoltaic technologies in the energy field, due to their clean and renewable low-cost manufacturing potential. OPV has rapidly developed with...

Cited by 6 publications

References 104 publications

Invariant Charge Carrier Dynamics Using a Non-Planar Non-Fullerene Acceptor across Multiple Processing Solvents

Invariant Charge Carrier Dynamics Using a Non-Planar Non-Fullerene Acceptor across Multiple Processing Solvents

The Multi‐Functional Third Acceptor Realizes the Synergistic Improvement in Photovoltaic Parameters and the High‐Ratio Tolerance of Ternary Organic Photovoltaics

Recent development in solid additives enables high-performance organic solar cells

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