Multi‐Selenophene Strategy Enables Dimeric Acceptors‐Based Organic Solar Cells with over 18.5% Efficiency

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(30)

Published: May 9, 2024

Abstract Dimeric acceptor (DMA) becomes a promising alternative to small‐molecular and polymeric acceptor‐based organic solar cells (OSCs) due its well‐defined chemical structure, high batch‐to‐batch reproducibility, low molecular diffusion properties. However, DMAs usually exhibit blueshifted absorptions, limiting their photon utilization abilities. Herein, multi‐selenophene strategies are adopted develop redshifted DMAs. From monomer (YSe) dimers (DYSe‐1 DYSe‐2), reduced electron reorganization energies exciton binding enable the efficient charge dynamics in DMAs‐based OSCs. Together with effective absorption extending ≈920 nm, DYSe‐1‐ DYSe‐2‐ based OSCs outstanding short‐circuit current densities ( J SC s) over 27 mA cm −2 , which best among Besides, compared YSe‐based device, both DMA‐based devices have higher electroluminescence quantum efficiencies thus reduce nonradiative recombination loss (ΔE 3 ), contributing energy losses. The resultant open‐circuit voltages V OC of ≈0.88 V, which, combining super values, lead power conversion 18.56% 18.22%, respectively. These results highlight great potential strategy for development performance.

Language: Английский

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Perspective on Flexible Organic Solar Cells for Self-Powered Wearable Applications

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

The growing advancement of wearable technologies and sophisticated sensors has driven the need for environmentally friendly reliable energy sources with robust mechanical stability. Flexible organic solar cells (OSCs) have become promising substitutes traditional solutions thanks to their remarkable flexibility high power conversion efficiency (PCE). These unique properties allow flexible OSCs seamlessly integrate diverse devices substrates, making them an excellent choice powering various electronic by efficiently harvesting energy. This review summarizes recent achievements in from perspective self-powered applications. It discusses advancements materials, including substrates transparent electrodes, evaluates performance criteria, compares PCEs rigid counterparts. Subsequently, novel applications are explored. Finally, a summary perspectives on current challenges obstacles facing wearables provided, aiming inspire further research toward practical implementations.

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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Manipulating Aggregation Kinetics toward Efficient All‐Printed Organic Solar Cells

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

Published: Feb. 5, 2025

Abstract The power conversion efficiencies (PCEs) of all‐printed organic solar cells (OSCs) remain inferior to those spin‐coated devices, primarily due morphological variations within the bulk heterojunction processed via diverse coating/printing techniques. Herein, cyclohexyl is introduced as outer side chains formulate a non‐fullerene acceptor, BTP‐Cy, aimed at modulating molecular aggregation in solution and subsequent film formation kinetics during printing. Investigations demonstrate that BTP‐Cy molecule with exhibits enhanced intermolecular π‐π stacking, optimal size, favorable phase separation. Consequently, PB3:FTCC‐Br:BTP‐Cy‐based OSCs achieve remarkable PCEs 20.2% 19.5% spin‐coating blade‐coating, respectively. Furthermore, 23.6 cm 2 module efficiency 16.7%. This study offers fresh perspective on tailoring photoactive materials printing through design, paving novel path enhance OSCs.

Language: Английский

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Multifunctional ternary semitransparent organic solar cell module with area above 100 cm² and average visible transmittance above 30%

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

We present a method for fabricating high-performance ST-OSC modules incorporating the high mobility small molecule donor BTR-Cl into active layer at low content, demonstrating potential of in field energy conservation and environmental protection.

Language: Английский

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The revival of 4H-cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) driven by low-cost and high-performance nonfused-ring electron acceptors

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(29), P. 17973 - 17991

Published: Jan. 1, 2024

This review comprehensively summarizes the development history of CPDT-based organic photovoltaic materials, which contributes to a deeper understanding revival CPDT driven by low-cost acceptors.

Language: Английский

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Thickness Insensitive Organic Solar Cells with High Figure‐of‐Merit‐X Enabled by Simultaneous D/A Interpenetration and Stratification

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(35)

Published: June 14, 2024

Abstract Low cost and printing friendly fabrication of organic solar cells (OSCs) require thick‐film devices with simply structured photoactive molecules. Thus, achieving high power conversion efficiency (PCE) for non‐fused ring acceptor‐based thickness is great significance. Herein, by transforming traditional blend casting method to emerging sequential deposition (SD) method, D18:A4T‐16 active exhibits large improvement from 8.02% 14.75% in 300 nm thick devices. Systematic morphological photophysical characterizations showcase the effectiveness SD processing sufficient donor/acceptor interpenetration vertical stratification, which eliminates dilemma charge generation/transport films. Meanwhile, D18 bottom layer proven helpful realizing fast evaporation postdeposited poor solvent, resulting naturally thickened well‐regulated crystallization. Furthermore, a new index emphasize based on nonfused acceptors, called figure‐of‐merit‐X (FoM‐X), has been defined. The processed herein, nm, 500 800 thicknesses possess leading FoM‐X values.

Language: Английский

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Pathways to Upscaling Highly Efficient Organic Solar Cells Using Green Solvents: A Study on Device Photophysics in the Transition from Lab‐to‐Fab

Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)

Published: June 17, 2024

Abstract As the rise of nonfullerene acceptors (NFA) has allowed lab‐scale organic solar cells (OSC) to reach 20% efficiency, translating these devices into roll‐to‐roll compatible fabrication still poses many challenges for researchers. Among are use green solvent solubility large‐scale manufacture, fabrication, and, not least, information on charge carrier dynamics in each upscaling step, further understand gap performance. In this work, reproducibility champion using slot‐die coating with 14% power conversion efficiency (PCE) is demonstrated, under condition that optimal thickness maintained. It shown donor:acceptor (D:A) blend PM6:Y12, processing a more significant impact compared deposition technique. found processed o‐xylene feature 40% decrease bimolecular recombination coefficient those CB, as well 70% increase effective mobility. Finally, it highlighted blade‐coating yields similar coating, making choice optimization no loss translation toward up‐scale.

Language: Английский

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A High‐Performance Organic Photovoltaic System with Versatile Solution Processability

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(35)

Published: July 14, 2024

Recently developed organic photovoltaic (OPV) materials have simultaneously closed the gaps in efficiency, stability, and cost for single-junction devices. Nonetheless, OPV still pose big challenges meeting requirements practical applications, especially regarding prevalent issues of solution processability. Herein, a highly efficient polymer donor, named DP3, incorporating an electron-rich benzo[1,2-b:4,5-b']dithiophene unit as well two similar simple acceptor units is presented. Its primary objective to enhance interchain and/or intrachain interactions ultimately fine-tune bulk-heterojunction microstructure. The DP3:L8-BO system demonstrates highest power conversion efficiency (PCE) 19.12%. This also exhibits high-performance devices with over 18% efficiencies five batches various molecular weights (23.6-80.8 KDa), six different blend thicknesses (95-308 nm), differenced coating speeds (3.0-29.1 m min

Language: Английский

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Sustainable Solution Processing Toward High‐Efficiency Organic Solar Cells: A Comprehensive Review of Materials, Strategies, and Applications

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

Published: Oct. 25, 2024

Abstract Organic solar cells (OSCs) have emerged as promising candidates for renewable energy harvesting due to their lightweight, flexible, and low‐cost fabrication potential. The efficiency of OSCs is largely determined by the choice solvents, which significantly affect film morphology active layers, intermixed donor‐acceptor domains, overall device performance. Beginning with an introduction importance solvent selection, screening classification emphasizing characteristics based on sustainability, solubility, other additional considerations are explored. Various non‐halogenated highlighting commonly used aromatic biomass‐derived water/alcohol‐based solvents state‐of‐the‐art donor acceptor materials, focusing efficient materials such PM6 D18, high‐performing Y‐series acceptors also presented. Strategies developing high‐performance processed using examined, including engineering additive additive‐free approaches, ternary strategies, layer‐by‐layer techniques. large‐area devices addressed, blade‐coating, slot‐coating, processing Finally, this review outlines future research directions in OSCs, need continuous innovation overcome existing limitations propel OSC technology toward commercial viability.

Language: Английский

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