Renewed Prospects for Organic Photovoltaics

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(18), P. 14180 - 14274

Published: Aug. 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.

Language: Английский

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A Vinylene‐Linker‐Based Polymer Acceptor Featuring a Coplanar and Rigid Molecular Conformation Enables High‐Performance All‐Polymer Solar Cells with Over 17% Efficiency

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(27)

Published: March 22, 2022

State-of-art Y-series polymer acceptors are typically based on a mono-thiophene linker, which can cause some twisted molecular conformations and thus limit the performance of all-polymer solar cells (all-PSCs). Here, high-performance acceptor vinylene linkers is reported, leads to surprising changes in polymers' conformations, optoelectronic properties, enhanced photovoltaic performance. It found that thiophene or bithiophene (PY-T-γ PY-2T-γ) display significant twisting between end-groups linker units, while vinylene-based (PY-V-γ) exhibits more coplanar rigid conformation. As result, PY-V-γ demonstrates better conjugation tighter interchain stacking, results higher mobility reduced energetic disorder. Furthermore, detailed morphology investigations reveal PY-V-γ-based blend high domain purity fill factor its all-PSCs. With these, efficiency 17.1% achieved all-PSCs, highest reported for binary all-PSCs date. This work vinylene-linker superior unit build with chain conformation, beneficial aggregation efficient

Language: Английский

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Advances in organic photovoltaic cells: a comprehensive review of materials, technologies, and performance

RSC Advances, Journal Year: 2023, Volume and Issue: 13(18), P. 12244 - 12269

Published: Jan. 1, 2023

The paper analyzes the key features, performance, efficiency, and electrical characteristics of organic PV cells to highlight latest trends advancements by using comparative tables a comprehensive SWOT analysis.

Language: Английский

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Material Design and Device Fabrication Strategies for Stretchable Organic Solar Cells

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(31)

Published: June 28, 2022

Abstract Recent advances in the power conversion efficiency (PCE) of organic solar cells (OSCs) have greatly enhanced their commercial viability. Considering technical standards (e.g., mechanical robustness) required for wearable electronics, which are promising application platforms OSCs, development fully stretchable OSCs (f‐SOSCs) should be accelerated. Here, a comprehensive overview f‐SOSCs, aimed to reliably operate under various forms stress, including bending and multidirectional stretching, is provided. First, requirements terms tensile cohesion/adhesion properties, summarized along with experimental methods evaluate those properties. Second, essential studies make each layer f‐SOSCs efficient discussed, emphasizing strategies simultaneously enhance photovoltaic properties active layer, ranging from material design fabrication control. Key improvements other components/layers (i.e., substrate, electrodes, interlayers) also covered. Lastly, considering that f‐SOSC research its infancy, current challenges future prospects explored.

Language: Английский

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Improved photovoltaic performance and robustness of all-polymer solar cells enabled by a polyfullerene guest acceptor

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: April 22, 2023

Abstract Fullerene acceptors typically possess excellent electron-transporting properties and can work as guest components in ternary organic solar cells to enhance the charge extraction efficiencies. However, conventional fullerene small molecules suffer from undesirable segregation dimerization, thus limiting their applications cells. Herein we report use of a poly(fullerene- alt -xylene) acceptor (PFBO-C12) component enables significant efficiency increase 16.9% for binary 18.0% all-polymer Ultrafast optic optoelectronic studies unveil that PFBO-C12 facilitate hole transfer suppress recombination. Morphological investigations show blends maintain favorable morphology with high crystallinity smaller domain size. Meanwhile, introduction reduces voltage loss light stability mechanical durability flexible devices. This demonstrates introducing polyfullerenes is an effective approach achieving highly efficient good robustness.

Language: Английский

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Recent Progress in Organic Solar Cells: A Review on Materials from Acceptor to Donor

Molecules, Journal Year: 2022, Volume and Issue: 27(6), P. 1800 - 1800

Published: March 10, 2022

In the last few decades, organic solar cells (OSCs) have drawn broad interest owing to their advantages such as being low cost, flexible, semitransparent, non-toxic, and ideal for roll-to-roll large-scale processing. Significant advances been made in field of OSCs containing high-performance active layer materials, electrodes, interlayers, well novel device structures. Particularly, innovation including acceptors donors, has contributed significantly power conversion efficiency (PCE) improvement OSCs. this review, acceptors, fullerene derivatives, small molecular, polymeric non-fullerene (NFAs), are discussed detail. Meanwhile, highly efficient donor materials designed fullerene- NFA-based also presented. Additionally, motivated by incessant developments acceptor recent ternary tandem reviewed well.

Language: Английский

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π‐Extended Conjugated Polymer Acceptor Containing Thienylene–Vinylene–Thienylene Unit for High‐Performance Thick‐Film All‐Polymer Solar Cells with Superior Long‐Term Stability

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(48)

Published: Nov. 7, 2021

Abstract Despite the rapid developments in all‐polymer solar cells (all‐PSCs) due to progress of polymerized small molecular acceptors (PSMA), effect linkage unit conjugation on polymer acceptor (P A ) is not well understood and P s with high efficiency, good stability, thickness‐insensitivity are rarely seen. Herein, two novel PSMAs, named PJTVT PJTET designed, by incorporating conjugated thienylene‐vinylene‐thienylene (TVT) unconjugated thienylene–ethyl–thienylene (TET) units, respectively. Results show that energy levels, losses, offset PSMAs have little difference ( <≈ 0.03 eV). However, π‐extended coplanar backbone PJTVT, when blended donor JD40, a more ordered π–π stacking enhanced face‐on orientation morphology observed, which contributes exciton dissociation, superior charge transport, faster extraction, leading record power conversion efficiency 16.13% (10.93% for JD40:PJTET). Impressively, JD40:PJTVT device shows long‐term both make it an ideal choice industrialization. These results demonstrate modulation linking promising strategy construct high‐performance thick‐film all‐PSCs superiority backbones PSMAs.

Language: Английский

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Regioisomer‐Free Difluoro‐Monochloro Terminal‐based Hexa‐Halogenated Acceptor with Optimized Crystal Packing for Efficient Binary Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(46)

Published: Sept. 2, 2022

Herein, we synthesized new hetero-halogenated end groups with well-determined fluorinated and chlorinated substitutions (o-FCl-IC FClF-IC), regioisomer-free small molecular acceptors (SMAs) Y-Cl, Y-FCl, Y-FClF distinct terminals, respectively. The single-crystal structures theoretical calculations indicate that exhibits more compact three-dimensional network packing significant π-π electronic coupling compared to Y-FCl. From Y-Cl Y-FCl Y-FClF, the neat films exhibit a narrower optical band gap gradually enhanced electron mobility crystallinity. PM6 : blend film strongest crystallinity preferential face-on packing, desirable fibrous morphology suitable phase segregation, highest balanced charge mobilities among three films. Overall, organic solar cells (OSCs) deliver remarkable efficiency of 17.65 %, outperforming which is best PCE for reported hetero-halogens-based SMAs in binary OSCs. Our results demonstrate difluoro-monochloro hetero-terminal superior regio-regular unit enhancing intermolecular crystal photovoltaic performance SMAs.

Language: Английский

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16.52% Efficiency All‐Polymer Solar Cells with High Tolerance of the Photoactive Layer Thickness

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(20)

Published: March 15, 2022

All-polymer solar cells (all-PSCs) have drawn growing attention and achieved tremendous progress recently, but their power conversion efficiency (PCE) still lags behind small-molecule-acceptor (SMA)-based PSCs due to the relative difficulty on morphology control of polymer photoactive blends. Here, low-cost PTQ10 is introduced as a second donor (a third component) into PM6:PY-IT blend finely tune energy-level matching microscopic layer. The addition decreases π-π stacking distance, increases coherence length ordered face-on molecular packing orientation, which improves charge separation transport in Moreover, deeper highest occupied orbital energy level than PM6 leads higher open-circuit voltage ternary all-PSCs. As result, PCE 16.52% for all-PSCs, one PCEs In addition, devices exhibit high tolerance layer thickness with 15.27% 13.91% at ≈205 ≈306 nm, respectively, are so far all-PSCs thick

Language: Английский

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High performance polymerized small molecule acceptor by synergistic optimization on π-bridge linker and side chain

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Sept. 7, 2022

The polymerized small-molecule acceptors have attracted great attention for application as polymer acceptor in all-polymer solar cells recently. modification of small molecule building block and the π-bridge linker is an effective strategy to improve photovoltaic performance acceptors. In this work, we synthesized a new PG-IT2F which representative PY-IT by replacing its upper linear alkyl side chains on with branched attaching difluorene substituents thiophene linker. Through synergistic optimization, possesses more suitable phase separation, increased charge transportation, better exciton dissociation, lower bimolecular recombination, longer transfer state lifetime than their PM6 donor. Therefore, devices based PM6:PG-IT2F demonstrated high power conversion efficiency 17.24%, one highest reported binary all date. This work indicates that regulation plays key role designing developing highly efficient

Language: Английский

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