A Novel Upside‐Down Thermal Annealing Method Toward High‐Quality Active Layers Enables Organic Solar Cells with Efficiency Approaching 20%

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(47)

Published: Oct. 9, 2024

Abstract The emerging non‐fullerene acceptors with low voltage losses have pushed the power conversion efficiency of organic solar cells (OSCs) to ≈20% auxiliary morphology optimization. Thermal annealing (TA), as most widely adopted post‐treatment method, has been playing an essential role in realizing potential various material systems. However, procedure TA, i.e., way that TA is performed, almost identical among thousands OSC papers since ≈30 years ago other than changes temperature and time. Herein, a reverse thermal (RTA) technique developed, which can enhance dielectric constant active layer film, thereby producing smaller Coulomb capture radius (14.93 nm), meanwhile, forming moderate nano‐scale phase aggregation more favorable face‐on molecular stacking orientation. Thus, this method reduce decline open circuit conventional by achieving decreased radiative (0.334 eV) non‐radiative (0.215 recombination loss. RTA PM6:L8‐BO‐X device increases 19.91% (certified 19.42%) compared (18.98%). It shown exhibits superb universality 4 systems, revealing its dramatic be employed wide range OSCs.

Language: Английский

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Over 18% Efficiency from Halogen‐Free Solvent‐Processed Polymer Solar Cells Enabled by Asymmetric Small Molecule Acceptors with Fluoro‐Thienyl Extended Terminal

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Abstract The potential impact of end‐group (EG) in non‐fullerene acceptor (NFA) on enabling green solvent‐processable polymer solar cells (PSCs) remains underexplored, offering opportunities for advancements environmentally friendly PSC development. Herein, the EG 1′,1′‐dicyanomethylene‐4‐fluoro‐5‐thienyl‐3‐indanone (IC‐FT) is developed by modifying state‐of‐the‐art Y6 derivative NFA, BTP‐4F, resulting two novel NFAs, namely BTP‐FT and BTP‐2FT. Distinctively, this study reveals that it noncovalent F···S interaction, other than commonly believed strong hydrogen bonding F···H plays a key role determining final molecular conformation, as confirmed means 2D NMR Gibbs free energy calculations. asymmetric possesses an upshifted lowest unoccupied orbital level enhances solubility toluene. Consequently, can mitigate phase separation, promote formation nanofibrillar morphology, facilitate exciton dissociation, ultimately enhance performance PSCs, achieving high open circuit voltage 0.900 V power conversion efficiency (PCE) 17.56%. Furthermore, ternary blend PM6:BTP‐FT:BTP‐4F achieves PCE 18.39% devices processed from This offers perspective NFA design high‐efficiency eco‐friendly processable PSCs enriching array electron‐withdrawing EGs molecules.

Language: Английский

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A systematic investigation on pyridine derived solid additives inducing fibrillar morphology for highly efficient organic solar cells with over 20 % efficiency

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 164, P. 100977 - 100977

Published: March 18, 2025

Language: Английский

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Device Performance of Emerging Photovoltaic Materials (Version 5)

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract This 5th annual “ Emerging PV Report” highlights the latest advancements in performance of emerging photovoltaic (e‐PV) devices across various e‐PV research areas, as documented peer‐reviewed articles published since August 2023. Updated graphs, tables, and analyses are provided, showcasing several key parameters, including power conversion efficiency, open‐circuit voltage, short‐circuit current, fill factor, light utilization stability test energy yield. These parameters presented functions bandgap average visible transmittance for each technology application contextualized using benchmarks such detailed balance efficiency limit.

Language: Английский

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Dual Liquid Rubber Matrix Based Highly Efficient and Mechanically Robust Layer‐by‐Layer Organic Solar Cells

SusMat, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

ABSTRACT Developing organic solar cells (OSCs) simultaneously possessing high efficiency and robust mechanical properties is one of crucial tasks to ensure their operational reliability applicability for emerging wearable devices. However, enhancing without compromising the electrical high‐performance active materials remains a challenge. This work presents method that overcomes this limitation by embedding dual liquid rubber (DLR) matrix consisting tetra‐fluorophenyl azide penta‐fluorophenyl end‐capped polybutadienes, PFFA PFF, into layer‐by‐layer (LBL) films, which enables finely controlled film morphology built on strong noncovalent interactions cross‐linking chemistry. The resulting LBL demonstrates significantly improved stretchability reduced stiffness layer, with crack initiation strain approximately eight times higher than pristine film. potential DLR strategy demonstrated in PM6:L8‐BO flexible power conversion 17.7%, among highest efficiencies OSCs date. More importantly, also significant bending durability retain 84.2% initial performance after 5000 cycles. design concept offers new achieving highly efficient stretchable OSCs.

Language: Английский

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High-performance and scalable large-area organic solar cells enabled by alloy-like composite-induced optimized morphology processed from non-halogenated solvent in air

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161811 - 161811

Published: March 1, 2025

Language: Английский

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An experimental and computational investigation of Thulium doped TiO2 as n-type material for potential application in bulk heterojunction organic solar cells

Materials for Renewable and Sustainable Energy, Journal Year: 2025, Volume and Issue: 14(1)

Published: March 28, 2025

Abstract Solar energy harvesting and conversion has attracted a lot of scientific interest because solar is believed to be clean sustainable. In this study, we report the synthesis porous TiO 2 by sol-gel method later doped with Thulium rare earth ions (Tm 3+ ) for potential application in organic cells as electron transport layers (ETL). Additionally, density functional theory (DFT) calculation was performed CASTEP computational suite explore further optoelectronic charge transfer mechanisms Tm(III)-doped nanomaterials. Thereafter, experimental material’s band gap values were extracted used numerical simulation designed cell general configuration FTO/TiO /PBDB-T/ITIC/Cu O/Ag, via SCAPS-1D simulator. The results showed steady reduction increased Tm doping. electrical conductivity properties an enhanced feature when nanoparticles. calculated from study shows similar decreasing trend that data, suggesting DFT are sufficient describe data. electronic behaviour analogous metal-metal metal-oxides features, which can attributed Ti – O hybridizations, indicated orbital state alignment. best performing modelled device (1.0 mol%) ETL attained PCE 21.83%, V oc 1.54 V, J sc 31.87 mA cm − FF 44.44% better characteristics effective alignment between absorber, thus, efficiency. proposes act suitable n-type material propel realisation high-performance OSCs commercialization future.

Language: Английский

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Organic Solar Cell with Efficiency of 20.49% Enabled by Solid Additive and Non‐Halogenated Solvent

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Recently, benzene‐based solid additives (BSAs) have emerged as pivotal components in modulating the morphology of blend film organic solar cells (OSCs). However, since almost all substituents on BSAs are weak electron‐withdrawing groups and contain halogen atoms, study with non‐halogenated strong has received little attention. Herein, an additive strategy is proposed, involving incorporation benzene ring. An effective BSA, 4‐nitro‐benzonitrile (NBN), selected to boost efficiency devices. The results demonstrate that NBN‐treated device exhibits enhanced light absorption, superior charge transport performance, mitigated recombination, more optimal compared additive‐free OSC. Consequently, D18:BTP‐eC9+NBN‐based binary D18:L8‐BO:BTP‐eC9+NBN‐based ternary OSC processed by solvent achieved outstanding efficiencies 20.22% 20.49%, respectively. Furthermore, universality NBN also confirmed different active layer systems. In conclusion, this work demonstrates introduction electron‐absorbing moieties ring a promising approach design BSAs, which can tune achieve highly efficient devices, certain guiding significance for development BSAs.

Language: Английский

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Suppressed Trap Density and Reduced Energy Disorder for High‐Performance Ultrathin Organic Near‐Infrared Photodetectors

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Abstract Ultrathin Organic Photodetectors (OPDs), renowned for their high miniaturization and energy efficiency, are increasingly integrated into everyday devices, including smartphones, tablet computers, medical equipment. However, the inherent trap density disorder associated with organic materials (especially at ultrathin thickness) have posed significant challenges to performance efficiency. This study presents a strategy controlling of high‐performance near‐infrared (NIR) OPDs by incorporating L8‐BO active layer PM6:BTP‐eC9 blends. A notable increase in is observed as thickness decreases from 110 20 nm, which correlates diminished photoelectric response OPDs. The incorporation enhances crystallinity blends, significantly suppressing disorder. Additionally, strategic integration can mitigate exciton‐phonon coupling extend carrier recombination time. Subsequently, optimized devices exhibit responsivity exceeding 0.4 W −1 an outstanding specific detectivity (2.30 × 10 13 Jones) 850 positioning them forefront contemporary NIR photodetector technology. These advancements present opportunity enhance OPDs, thereby facilitating rapidly expanding field.

Language: Английский

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A Review on Transparent Electrodes for Flexible Organic Solar Cells

Coatings, Journal Year: 2024, Volume and Issue: 14(8), P. 1031 - 1031

Published: Aug. 14, 2024

Flexible organic solar cells (FOSCs) represent a promising and rapidly evolving technology, characterized by lightweight construction, cost-effectiveness, adaptability to various shapes sizes. These advantages render FOSCs highly suitable for applications in diverse fields, including wearable electronics building-integrated photovoltaics. The application scope of necessitates electrodes with properties such as high optical transmittance, low electrical resistivity, exceptional mechanical strength, where their selection significantly influences the overall device performance. This review explores several materials, focusing on polymers, carbon nanomaterials, metal nanowires, highlighting unique challenges FOSC applications. Through this thorough review, we would like elucidate relationship between electrode materials performance, thereby inspiring further improvements developments broadening range.

Language: Английский

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