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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Recent progress in organic solar cells (Part I material science)

Science China Chemistry, Journal Year: 2021, Volume and Issue: 65(2), P. 224 - 268

Published: Dec. 27, 2021

Language: Английский

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Achieving 19% Power Conversion Efficiency in Planar‐Mixed Heterojunction Organic Solar Cells Using a Pseudosymmetric Electron Acceptor

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(32)

Published: June 20, 2022

A record power conversion efficiency (PCE) of over 19% is realized in planar-mixed heterojunction (PMHJ) organic solar cells (OSCs) by adopting the asymmetric selenium substitution strategy making a pseudosymmetric electron acceptor, BS3TSe-4F. The combined molecular asymmetry with more polarizable increases dielectric constant D18/BS3TSe-4F blend, helping lower exciton binding energy. On other hand, dimer packing BS3TSe-4F facilitated to enable free charge generation, efficient dissociation and lowering radiative recombination loss (ΔE2 ) OSCs. As result, PMHJ OSCs based on achieve PCE 18.48%. By incorporating another mid-bandgap acceptor Y6-O into form ternary PMHJ, higher open-circuit voltage (VOC can be achieved realize an impressive 19.03%. findings using acceptors enhancing device provides effective way develop highly materials for

Language: Английский

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Asymmetric electron acceptor enables highly luminescent organic solar cells with certified efficiency over 18%

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

Published: May 11, 2022

Enhancing the luminescence property without sacrificing charge collection is one key to high-performance organic solar cells (OSCs), while limited by severe non-radiative recombination. Here, we demonstrate efficient OSCs with high via design and synthesis of an asymmetric non-fullerene acceptor, BO-5Cl. Blending BO-5Cl PM6 donor leads a record-high electroluminescence external quantum efficiency 0.1%, which results in low voltage loss 0.178 eV power conversion (PCE) over 15%. Importantly, incorporating as third component into widely-studied donor:acceptor (D:A) blend, PM6:BO-4Cl, allows device displaying certified PCE 18.2%. Our joint experimental theoretical studies unveil that more diverse D:A interfacial conformations formed acceptor induce optimized blend energetics, contributes improved performance balancing generation

Language: Английский

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Recent Progress of Y6‐Derived Asymmetric Fused Ring Electron Acceptors

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(35)

Published: July 5, 2022

Abstract Symmetric conjugated molecules can be broken through suitable synthetic strategies to construct novel asymmetric molecules, which largely broaden the material library. In field of organic solar cells, fused‐ring electron acceptors (FREAs) with A‐DA'D‐A type backbone structure have attracted much attention and enabled power conversion efficiencies (PCE) exceeding 18%. Among them, Y6 is one most classic FREAs that derive many symmetric exhibit unique optoelectronic properties. Thus, in this review, focus on recent progress Y6‐derived containing a dipyrrolobenzothiadiazole segment, classified as following three categories: end group, central core side chain. The relationship molecular structure, properties, device performance discussed detail. Finally, future design directions challenges faced by kind photovoltaic materials are given.

Language: Английский

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Process‐Aid Solid Engineering Triggers Delicately Modulation of Y‐Series Non‐Fullerene Acceptor for Efficient Organic Solar Cells

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

Published: March 22, 2022

Volatile solids with symmetric π-backbone are intensively implemented on manipulating the nanomorphology for improving operability and stability of organic solar cells. However, due to isotropic stacking, announced geometry cannot modify microscopic phase separation component distribution collaboratively, which will constrain promotion exciton splitting charge collection efficiency. Inspired by superiorities asymmetric configuration, a novel process-aid solid (PAS) engineering is proposed. By coupling BTP core unit in Y-series molecule, an asymmetric, volatile 1,3-dibromo-5-chlorobenzene can induce anisotropic dipole direction, elevated moment, interlaminar interaction spontaneously. Due synergetic effects favorable desired distribution, PAS-treated devices feature evident improvement splitting, transport, collection, accompanied suppressed trap-assisted recombination. Consequently, impressive fill factor 80.2% maximum power conversion efficiency (PCE) 18.5% device achieved. More strikingly, demonstrate promising thickness-tolerance character, where record PCE 17.0% yielded PAS 300 nm thickness photoactive layer, represents highest thick-film

Language: Английский

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A Synergistic Strategy of Manipulating the Number of Selenophene Units and Dissymmetric Central Core of Small Molecular Acceptors Enables Polymer Solar Cells with 17.5 % Efficiency

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(35), P. 19241 - 19252

Published: June 3, 2021

Abstract A dissymmetric backbone and selenophene substitution on the central core was used for synthesis of symmetric or A‐DA′D‐A type non‐fullerene small molecular acceptors (NF‐SMAs) with different numbers selenophene. From S‐YSS‐Cl to A‐WSSe‐Cl S‐WSeSe‐Cl , a gradually red‐shifted absorption larger electron mobility crystallinity in neat thin film observed. exhibit stronger tighter intermolecular π–π stacking interactions, extra S⋅⋅⋅N non‐covalent interactions from benzothiadiazole, better ordered 3D interpenetrating charge‐transfer networks comparison thiophene‐based . The ‐based device has PCE 17.51 %, which is highest value selenophene‐based NF‐SMAs binary polymer solar cells. combination precise replacement effective improve J sc FF without sacrificing V oc

Language: Английский

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Rational compatibility in a ternary matrix enables all-small-molecule organic solar cells with over 16% efficiency

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(7), P. 3945 - 3953

Published: Jan. 1, 2021

The ternary all-small-molecule organic solar cells deliver a top-ranked power conversion efficiency of 16.28%, benefiting from the rational compatibility in theB1:BO-4Cl:Y7matrix.

Language: Английский

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Multi‐Selenophene‐Containing Narrow Bandgap Polymer Acceptors for All‐Polymer Solar Cells with over 15 % Efficiency and High Reproducibility

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(29), P. 15935 - 15943

Published: May 3, 2021

Abstract All‐polymer solar cells (all‐PSCs) progressed tremendously due to recent advances in polymerized small molecule acceptors (PSMAs), and their power conversion efficiencies (PCEs) have exceeded 15 %. However, the practical applications of all‐PSCs are still restricted by a lack PSMAs with broad absorption, high electron mobility, low energy loss, good batch‐to‐batch reproducibility. A multi‐selenophene‐containing PSMA, PFY‐3Se, was developed based on selenophene‐fused SMA framework selenophene π‐spacer. Compared its thiophene analogue PFY‐0Se, PFY‐3Se shows ≈30 nm red‐shifted increased improved intermolecular interaction. In all‐PSCs, achieved an impressive PCE 15.1 % both short‐circuit current density 23.6 mA cm −2 fill factor 0.737, which among best values reported date much better than PFY‐0Se (PCE=13.0 %). Notably, maintains similarly properties for realizing reproducible device performance, is first also very rare PSMAs. Moreover, PFY‐3Se‐based show dependence area (0.045–1.0 2 ) active layer thickness (110–250 nm), indicating great potential toward applications.

Language: Английский

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Organic Solar Cells with Over 19% Efficiency Enabled by a 2D‐Conjugated Non‐Fullerene Acceptor Featuring Favorable Electronic and Aggregation Structures

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)

Published: May 27, 2023

The π-expansion of non-fullerene acceptors is a promising method for boosting the organic photovoltaic performance by allowing fine-tuning electronic structures and molecular packing. In this work, highly efficient solar cells (OSCs) are fabricated using 2D strategy to design new acceptors. Compared with quinoxaline-fused cores AQx-16, π-expanded phenazine-fused AQx-18 induce more ordered compact packing between adjacent molecules, affording an optimized morphology rational phase separation in blend film. This facilitates exciton dissociation inhibited charge recombination. Consequently, power conversion efficiency (PCE) 18.2% simultaneously increasing Voc , Jsc fill factor achieved AQx-18-based binary OSCs. Significantly, ternary devices via two-in-one alloy acceptor exhibit superior PCE 19.1%, one highest values ever reported OSCs, along high 0.928 V. These results indicate importance delicate regulation crystalline behaviors achieve performance, aimed at significantly promoting further development

Language: Английский

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