Regioregular Narrow‐Bandgap n‐Type Polymers with High Electron Mobility Enabling Highly Efficient All‐Polymer Solar Cells

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(37)

Published: Aug. 2, 2021

Abstract Narrow‐bandgap n‐type polymers with high electron mobility are urgently demanded for the development of all‐polymer solar cells (all‐PSCs). Here, two regioregular narrow‐bandgap polymer acceptors, L15 and MBTI, electron‐deficient segments synthesized by copolymerizing dibrominated fused‐ring acceptors (FREA) distannylated aromatic imide, respectively. Taking full advantage FREA both show narrow bandgap mobility. Benefiting from more extended absorption, better backbone ordering, higher than those its regiorandom analog, L15‐based all‐PSC yields a power conversion efficiency (PCE) 15.2% when blended donor PM6. More importantly, MBTI incorporating benzothiophene‐core segment shows relatively frontier molecular orbital levels L15, forming cascade‐like energy level alignment Based on this, ternary all‐PSCs designed where is introduced as guest into PM6:L15 host system. Thanks to further optimal blend morphology balanced charge transport, PCE improved up 16.2%, which among highest values all‐PSCs. The results demonstrate that combining an imide construct provides effective approach fabricate highly efficient

Language: Английский

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Achieving highly efficient all-polymer solar cells by green-solvent-processing under ambient atmosphere

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(8), P. 4499 - 4507

Published: Jan. 1, 2021

The nonhalogenated solvent o-XY-processed-all-PSCs achieved a highly-efficient PCE of 15.6% along with decent processability under ambient conditions.

Language: Английский

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A review on organic photovoltaic cell

International Journal of Energy Research, Journal Year: 2022, Volume and Issue: 46(13), P. 17813 - 17828

Published: July 28, 2022

The objective of this article is to identify how organic photovoltaic cells have been addressed in scientific studies published until 2022. To end, a literature review was conducted, which involved the search for articles through Advanced Search tool Periodicals portal Coordination Improvement Higher Education Personnel, as well preparation Microsoft Excel spreadsheet assist classifying articles, followed by structured analysis structure, operating principle, materials, performance parameters, stability/life span/degradation, challenges, opportunities, and applications cells. results research point out that devices are formed electrodes (anode, such indium-tin oxide, silver nanowires, carbon nanotubes graphene cathode, calcium, barium, or aluminum), hole transport layers (PEDOT:PSS), electrons (ZnO TiO2), active layer (donor, P3HT PTB7, acceptor, C60 C70 fullerenes their PCBM derivatives, non-fulerene acceptors). We further working principle consists generation photocurrent from absorption photon an exciton, turn diffuses donor–acceptor interface, disassociates into free carriers, carry collected charges electrodes. find simple manufacture, less expensive, more flexible, lightweight, development these has advanced recent years. However, practical relevance, some challenges need be overcome, including power conversion efficiency, stability, degradation, lifetime, fabrication large areas roll-to-roll methods.

Language: Английский

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Recent Progress in the Design of Fused-Ring Non-Fullerene Acceptors─Relations between Molecular Structure and Optical, Electronic, and Photovoltaic Properties

ACS Applied Energy Materials, Journal Year: 2021, Volume and Issue: 4(11), P. 11899 - 11981

Published: Oct. 26, 2021

Organic solar cells are on the dawn of next era. The change focus toward non-fullerene acceptors has introduced an enormous amount organic n-type materials and drastically increased power conversion efficiencies photovoltaics, now exceeding 18%, a value that was believed to be unreachable some years ago. In this Review, we summarize recent progress in design ladder-type fused-ring 2018–2020. We thereby concentrate single layer heterojunction omit tandem architectures as well ternary cells. By analyzing more than 700 structures, highlight basic principles their influence optical electrical structure acceptor molecules review photovoltaic performance obtained so far. This Review should give extensive overview plenitude motifs but will also help understand which structures strategies beneficial for designing highly efficient

Language: Английский

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Overview of printing and coating techniques in the production of organic photovoltaic cells

International Journal of Energy Research, Journal Year: 2020, Volume and Issue: 44(13), P. 9912 - 9931

Published: July 8, 2020

The organic photovoltaic cell (OPV) is composed of multiple layers, and some printing coating techniques are more suitable than others for a certain type layer. This paper aims to characterize compare the most relevant that can be used in manufacture OPVs. Extensive bibliographic research was carried out on articles published from 1998 2020 identify various aspects OPV, such as principle operation, advantages, disadvantages, which layers printed by each technique. results show method processing OPVs spin-coating. In studies found, rotation coat active layer, electron transport hole pad printing, casting, meniscus considered useful Regarding deposition anode, rotogravure, crack matrix, spraying, brushing were satisfactory. Flexography has been form anode. Screen inkjet knife/blade cathode. All double slot die coating, curtain slide allows simultaneous layers. Techniques compatible with roll-to-roll likely at center future, thus making solar technology competitive.

Language: Английский

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Simple Near-Infrared Electron Acceptors for Efficient Photovoltaics and Sensitive Photodetectors

ACS Applied Materials & Interfaces, Journal Year: 2020, Volume and Issue: 12(35), P. 39515 - 39523

Published: Aug. 10, 2020

Although promising progress has been made in near-infrared (NIR) electron acceptors for broadening photoresponse of optoelectronics, there are still strong needs efficient NIR materials with low synthetic complexities. In this work, three simple developed absorption up to 1000 nm and possessing the same dithiophene cores varied heteroatom linkages carbon (C) atom W1, silicon (Si) W2, nitrogen (N) W3. It is found that tuning only one can surprisingly lead a large difference photoelectric properties solid stacking, as well performance optoelectronics. quite simple, these acceptors, especially W1 (C), also perform efficiently organic photovoltaics (OPVs) sensitive photodetectors (OPDs) when blended PTB7-Th polymer. worthy note that, among representative over 950 absorption, possesses best figure-of-merit considering versus complexity materials. As result, PTB7-Th:W1-based OPDs reach fast temporal response, ultralow-light intensity detection 1.70 × 10-11 W·cm-2, high specific detectivity 4.28 1012 cm·Hz1/2·W-1 at 830 nm, representing highly self-powered OPD approach commercial broadband detectors. These structure provide potential example further application acceptor.

Language: Английский

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Theoretical designing of non-fullerene derived organic heterocyclic compounds with enhanced nonlinear optical amplitude: a DFT based prediction

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: Nov. 23, 2022

Abstract In current era, non-fullerene (NF) chromophores have been reported as significant NLO materials due to promising optoelectronic properties. Therefore, a series of NF based abbreviated TPBD2-TPBD6 with D–π–A architecture was designed from the reference compound ( TPBR1 ) by its structural tailoring an efficient donor and various acceptor groups for first time. First, structures said compounds were optimized at M06-2X/6-311G (d,p) level. Further, utilized execute frontier molecular orbitals (FMOs), UV–Visible (UV–Vis) absorption, density states (DOS) transition matrix (TDM) analyses same level understand non-linear (NLO) response . Promising results achieved all derivatives i.e., highest amplitude linear polarizability ⟨ α ⟩, β total second $$\gamma$$ γ hyperpolarizabilities than their parent molecule. The TPBD3 noted most properties compared standard modeling approach utilizing molecules has played prominent role in attaining favorable responses molecules. Thus, our study tempted experimentalists synthesize proposed modern high-tech applications.

Language: Английский

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Heptacyclic S,N-Heteroacene-Based Near-Infrared Nonfullerene Acceptor Enables High-Performance Organic Solar Cells with Small Highest Occupied Molecular Orbital Offsets

ACS Applied Materials & Interfaces, Journal Year: 2020, Volume and Issue: 12(46), P. 51776 - 51784

Published: Nov. 6, 2020

The reduction of energy offsets between donors and acceptors is a direct way to improve the open-circuit voltage (VOC) overall performance organic solar cells (OSCs). In this work, two nonfullerene (NFAs) (BDTBO-4F BDTBO-4Cl) were synthesized, which composed heptacyclic S,N-heteroacene core terminal units with halogen atoms, where latter modulates level frontier molecular orbital. Consequently, BDTBO-4Cl exhibited deeper highest occupied orbital (EHOMO) lowest unoccupied (ELUMO) than BDTBO-4F. Moreover, these NFAs high electron mobility strong absorption at 700-900 nm. polymer donor PM6 was combined BDTBO-4F BDTBO-4Cl, resulting OSCs outstanding power conversion efficiencies 14.83% for PM6:BDTBO-4F device 13.87% PM6:BDTBO-4Cl device. More encouragingly, efficient hole transfer from PM6, despite small ΔEHOMO(D-A) values (<0.10 eV). These results prove that modulation EHOMO decrease an strategy high-performance OSCs.

Language: Английский

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Spectroscopic and Nonlinear Optical Insights of Picolinaldehyde‐Based Materials: Experimental and DFT Approach

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(12)

Published: March 1, 2025

Abstract Herein, a series of picolinaldehyde‐based materials ( DMeP‐TFMP ) were synthesized, via the decarboxylative Suzuki coupling reaction using readily accessible 2‐formyl‐6‐pyridinoic acid, to investigate their nonlinear optical (NLO) properties. Various spectroscopic techniques like UV–vis, FT‐IR, ¹H‐NMR, and ¹ 3 C‐NMR employed elucidate molecular structures synthesized chromophores. Further, density functional theory (DFT) time dependent (TD‐DFT) calculations at M06/6‐311G (d,p) level conducted assess frontier orbitals (FMOs), absorption properties, insights. The DMeP displayed minimal band gap (4.390 eV among studied compounds with highest bathochromic shift (340.476 nm). states (DOS) transition matrix (TDM) analyses validated charge transitions from valance conduction band. All exhibited enhanced exciton dissociation rates because low binding energy values E b = 0.525 0.572 ). Furthermore, electron‐hole analysis revealed distribution electron hole densities across different atoms in compounds, indicating significant creation specific atomic sites. notable linear polarizability that is, (⟨α⟩ 2.59 × 10⁻ 2 ‐3.62 esu ), first hyperpolarizability β tot 2.87 ⁰−16.4 ⁰ second γ 1.93 ⁵‐8.44 ⁵ highlighting potential as efficient for advanced NLO applications.

Language: Английский

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Rational design and DFT-based study of non-fullerene acceptors for high-performance organic solar cells: End-cap and Core modifications for enhanced charge transfer

Computational and Theoretical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 115209 - 115209

Published: March 1, 2025

Language: Английский

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