Renewed Prospects for Organic Photovoltaics

Chemical Reviews, Год журнала: 2022, Номер 122(18), С. 14180 - 14274

Опубликована: Авг. 5, 2022

Organic photovoltaics (OPVs) have progressed steadily through three stages of photoactive materials development: (i) use poly(3-hexylthiophene) and fullerene-based acceptors (FAs) for optimizing bulk heterojunctions; (ii) development new donors to better match with FAs; (iii) non-fullerene (NFAs). The application NFAs an A–D–A configuration (where A = acceptor D donor) has enabled devices efficient charge generation small energy losses (Eloss < 0.6 eV), resulting in substantially higher power conversion efficiencies (PCEs) than FA-based devices. discovery Y6-type (Y6 2,2′-((2Z,2′Z)-((12,13-bis(2-ethylhexyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]-thiadiazolo[3,4-e]-thieno[2″,3″:4′,5′]thieno-[2′,3′:4,5]pyrrolo-[3,2-g]thieno-[2′,3′:4,5]thieno-[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile) A–DA′ D–A further propelled the PCEs go beyond 15% due smaller Eloss values (∼0.5 eV) external quantum efficiencies. Subsequently, Y6-series single-junction increased >19% may soon approach 20%. This review provides update recent progress OPV following aspects: developments novel donors, understanding structure–property relationships underlying mechanisms state-of-the-art OPVs, tasks underpinning commercialization such as device stability, module development, potential applications, high-throughput manufacturing. Finally, outlook prospects section summarizes remaining challenges technology.

Язык: Английский

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Single‐Junction Organic Solar Cells with 19.17% Efficiency Enabled by Introducing One Asymmetric Guest Acceptor

Advanced Materials, Год журнала: 2022, Номер 34(26)

Опубликована: Апрель 19, 2022

The ternary strategy has been widely identified as an effective approach to obtain high-efficiency organic solar cells (OSCs). However, for most OSCs, the nonradiative voltage loss lies between those of two binary devices, which limits further efficiency improvements. Herein, asymmetric guest acceptor BTP-2F2Cl is designed and incorporated into a PM1:L8-BO host blend. Compared with L8-BO neat film, L8-BO:BTP-2F2Cl blend film shows higher photoluminescence quantum yield larger exciton diffusion length. Introducing extends its absorption spectrum, improves molecular packing materials, suppresses charge recombination OSCs. Consequently, power conversion improved up 19.17% (certified value 18.7%), represents highest reported single-junction OSCs so far. results show that improving behaviors promising reducing realizing high-performance

Язык: Английский

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Realizing 19.05% Efficiency Polymer Solar Cells by Progressively Improving Charge Extraction and Suppressing Charge Recombination

Advanced Materials, Год журнала: 2022, Номер 34(13)

Опубликована: Янв. 26, 2022

Improving charge extraction and suppressing recombination are critically important to minimize the loss of absorbed photons improve device performance polymer solar cells (PSCs). In this work, highly efficient PSCs demonstrated by progressively improving through combination side-chain engineering new nonfullerene acceptors (NFAs), adopting ternary blends, introducing volatilizable solid additives. The 2D side chains on BTP-Th induce a certain steric hindrance for molecular packing phase separation, which is mitigated fluorination BTP-FTh. Moreover, two crystalline molecules as second acceptor additive, respectively, into BTP-FTh-based host blend, crystallinity significantly improved blend morphology finely optimized. As expected, enhanced suppressed realized, contributing largely fill factor (FF) resultant devices. Accompanied open-circuit voltage (Voc ) short-circuit current density (Jsc ), record high power conversion efficiency (PCE) 19.05% realized finally.

Язык: Английский

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2023 Critical Materials Strategy

Опубликована: Июль 1, 2023

For more than a decade, the U.S. Department of Energy (DOE) has funded basic and applied research development (R&D) related to critical materials address scientific technological (S&T) challenges that underpin

Язык: Английский

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Vertically optimized phase separation with improved exciton diffusion enables efficient organic solar cells with thick active layers

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Май 2, 2022

The development of organic solar cells (OSCs) with thick active layers is crucial importance for the roll-to-roll printing large-area panels. Unfortunately, increasing layer thickness usually results in a significant reduction efficiency. Herein, we fabricated efficient thick-film OSCs an consisting one polymer donor and two non-fullerene acceptors. acceptors were found to possess enlarged exciton diffusion length mixed phase, which beneficial generation dissociation. Additionally, by approach was employed optimize vertical phase separation. Benefiting from synergetic effects graded separation, efficiency 17.31% (certified value 16.9%) obtained 300 nm-thick OSC, short-circuit current density 28.36 mA cm-2, high fill factor 73.0%. Moreover, device 500 nm also shows 15.21%. This work provides valuable insights into fabrication layers.

Язык: Английский

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Small reorganization energy acceptors enable low energy losses in non-fullerene organic solar cells

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Июнь 7, 2022

Minimizing energy loss is of critical importance in the pursuit attaining high-performance organic solar cells. Interestingly, reorganization plays a crucial role photoelectric conversion processes. However, understanding relationship between and losses has rarely been studied. Here, two acceptors, Qx-1 Qx-2, were developed. The energies these acceptors during processes are substantially smaller than conventional Y6 acceptor, which beneficial for improving exciton lifetime diffusion length, promoting charge transport, reducing originating from dissociation non-radiative recombination. So, high efficiency 18.2% with open circuit voltage above 0.93 V PM6:Qx-2 blend, accompanies significantly reduced 0.48 eV. This work underlines achieving small paves way to obtain

Язык: Английский

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Ternary Blend Organic Solar Cells: Understanding the Morphology from Recent Progress

Advanced Materials, Год журнала: 2021, Номер 34(46)

Опубликована: Ноя. 19, 2021

Ternary blend organic solar cells (TB-OSCs) incorporating multiple donor and/or acceptor materials into the active layer have emerged as a promising strategy to simultaneously improve overall device parameters for realizing higher performances than binary devices. Whereas introducing also results in more complicated morphology their counterparts. Understanding is crucially important further improving performance of TB-OSC. This review introduces solubility and miscibility that affect ternary blends. Then, this summarizes recent processes study on blends from aspects molecular crystallinity, packing orientation, domain size purity, directly observation morphology, vertical phase separation well morphological stability. Finally, summary prospects TB-OSCs are concluded.

Язык: Английский

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Achieving high efficiency and well-kept ductility in ternary all-polymer organic photovoltaic blends thanks to two well miscible donors

Matter, Год журнала: 2022, Номер 5(2), С. 725 - 734

Опубликована: Янв. 4, 2022

Язык: Английский

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Recent progress in organic solar cells based on non-fullerene acceptors: materials to devices

Journal of Materials Chemistry A, Год журнала: 2022, Номер 10(7), С. 3255 - 3295

Опубликована: Янв. 1, 2022

This review presents the recent progress in organic solar cells based on non-fullerene acceptors, with a wide coverage from material synthesis and processing to interface engineering, device structure, large-area fabrication, stability.

Язык: Английский

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Isomerization strategy on a non-fullerene guest acceptor for stable organic solar cells with over 19% efficiency

Energy & Environmental Science, Год журнала: 2023, Номер 16(7), С. 3119 - 3127

Опубликована: Янв. 1, 2023

Isomeric non-fullerene acceptor guest with large π-conjugation skeleton is used to construct stable organic solar cells efficiencies over 19%.

Язык: Английский

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