Single‐Junction Organic Photovoltaic Cell with 19% Efficiency

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(41)

Published: Aug. 31, 2021

Abstract Improving power conversion efficiency (PCE) is important for broadening the applications of organic photovoltaic (OPV) cells. Here, a maximum PCE 19.0% (certified value 18.7%) achieved in single‐junction OPV cells by combining material design with ternary blending strategy. An active layer comprising new wide‐bandgap polymer donor named PBQx‐TF and low‐bandgap non‐fullerene acceptor (NFA) eC9‐2Cl rationally designed. With optimized light utilization, resulting binary cell exhibits good 17.7%. NFA F‐BTA3 then added to as third component simultaneously improve parameters. The improved unitization, cascaded energy level alignment, enhanced intermolecular packing result open‐circuit voltage 0.879 V, short‐circuit current density 26.7 mA cm −2 , fill factor 0.809. This study demonstrates that further improvement PCEs high‐performance requires fine tuning electronic structures morphologies layers.

Language: Английский

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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 II device engineering)

Science China Chemistry, Journal Year: 2022, Volume and Issue: 65(8), P. 1457 - 1497

Published: May 26, 2022

Language: Английский

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Suppressed recombination loss in organic photovoltaics adopting a planar–mixed heterojunction architecture

Nature Energy, Journal Year: 2022, Volume and Issue: 7(11), P. 1076 - 1086

Published: Nov. 14, 2022

Language: Английский

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π-Extended Nonfullerene Acceptor for Compressed Molecular Packing in Organic Solar Cells To Achieve over 20% Efficiency

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(17), P. 12011 - 12019

Published: April 19, 2024

Organic photovoltaics (OPVs) suffer from a trade-off between efficient charge transport and suppressed nonradiative recombination due to the aggregation-induced luminance quenching of organic semiconductors. To resolve this grand challenge, π-extended nonfullerene acceptor (NFA) B6Cl with large voids among honeycomb network is designed introduced into photovoltaic systems. We find that presence small amount (i.e., 0.5 or 1 wt %) can compress molecular packing host L8-BO, leading shortened π–π stacking distance 3.59 3.50 Å (that will improve transport) together ordered alkyl chain inhibit energy loss C–C C–H bonds vibrations), as validated by high-energy X-ray scattering measurements. This morphology transformation ultimately results in simultaneously improved JSC, FF, VOC OPVs. As result, maximum PCEs PM6:L8-BO D18:L8-BO are increased 19.1 19.3% 19.8 20.2%, respectively, which highest values for single-junction The university increase performance OPVs further evidenced range polymer:NFA

Language: Английский

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High-performance polymer solar cells with efficiency over 18% enabled by asymmetric side chain engineering of non-fullerene acceptors

Science China Chemistry, Journal Year: 2021, Volume and Issue: 64(7), P. 1192 - 1199

Published: May 20, 2021

Language: Английский

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Simple Nonfused Ring Electron Acceptors with 3D Network Packing Structure Boosting the Efficiency of Organic Solar Cells to 15.44%

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(45)

Published: Oct. 17, 2021

Abstract Three nonfused ring electron acceptors (NFREAs; 2Th‐2F, BTh‐Th‐2F, and 2BTh‐2F) with thieno[3,2‐ b ]thiophene bearing two bis(4‐butylphenyl)amino substituents as the core, 3‐octylthiophene or 3‐octylthieno[3,2‐ spacer, 3‐(1,1‐dicyanomethylene)‐5,6‐difluoro‐1‐indanone terminal group are designed synthesized. The molar extinction coefficient of mobility blend films gradually increase increasing π‐conjugation length. Moreover, 2BTh‐2F displays a planar molecular conformation assisted by S···N S···O intramolecular interactions. More importantly, stacking changes from 2D packing for 2Th‐2F analog to 3D network 2BTh‐2F. Due these comprehensive merits, 2BTh‐2F:PBDB‐T‐based organic solar cells give high power conversion efficiency 14.53%. impressively, when D18 is used donor polymer, further enhanced 15.44%, which highest value reported based on NFREAs.

Language: Английский

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18.69% PCE from organic solar cells

Journal of Semiconductors, Journal Year: 2021, Volume and Issue: 42(6), P. 060502 - 060502

Published: June 1, 2021

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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Side‐Chain Engineering for Enhancing the Molecular Rigidity and Photovoltaic Performance of Noncovalently Fused‐Ring Electron Acceptors

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(32), P. 17720 - 17725

Published: June 1, 2021

Abstract Side‐chain engineering is an effective strategy to regulate the solubility and packing behavior of organic materials. Recently, a unique strategy, so‐called terminal side‐chain (T‐SC) engineering, has attracted much attention in field solar cells (OSCs), but there lack deep understanding mechanism. Herein, new noncovalently fused‐ring electron acceptor (NFREA) containing two T‐SCs ( NoCA‐5 ) was designed synthesized. Introduction can enhance molecular rigidity intermolecular π–π stacking, which confirmed by smaller Stokes shift value, lower reorganization free energy, shorter stacking distance comparison NoCA‐1 . Hence, ‐based device exhibits record power conversion efficiency (PCE) 14.82 % labs certified PCE 14.5 %, resulting from high mobility, short charge‐extraction time, small Urbach energy E u ), favorable phase separation.

Language: Английский

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