Over 18.8% Efficiency of Layer‐By‐Layer Organic Photovoltaics Enabled by Ameliorating Exciton Utilization in Acceptor Layer

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(16)

Published: Jan. 2, 2024

Abstract The layer‐by‐layer (LbL) organic photovoltaics (OPVs) are constructed with wide‐bandgap donor PM1 and narrow‐bandgap acceptor L8‐BO. exciton utilization near cathode is still challenging considering restricted diffusion distance of excitons inability for transferring energy from L8‐BO to PM1. Herein, incorporation into layer (DIA) strategy employed improve cathode. efficiency LbL OPVs can be improved 18.02% 18.81% by incorporating 10 wt% layer, which closely associated efficient separation originated more adequate donor/acceptor interface faster charge transfer, as evidenced magneto‐photocurrent transient absorption results. in situ test morphological characterization clarify that molecular packing property benefited prolonged aggregation nucleation time assisted DIA strategy, contributing transport inhibited recombination active layers. thickness insensitive also induced indicated PCE retention value (82.2% vs. 74.0%) PM1/L8‐BO:PM1 PM1/L8‐BO when increased ≈180 nm. This work demonstrates the effectiveness improving tolerance OPVs.

Language: Английский

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A nonfullerene acceptor as a solid additive realizing a record efficiency of 17.74% in quasi-layered all-polymer solar cells

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(7), P. 4077 - 4085

Published: Jan. 1, 2024

The nonfullerene acceptor L8-BO as solid additive was incorporated into QLA-PSCs based on PM6 and PY-IT. molecular orientation exciton diffusion length in PY-IT layer can be optimized, resulting the PCE enhanced from 16.14% to 17.74%.

Language: Английский

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Interfacial Engineering for Photomultiplication Type Organic Photodetectors with Signal‐Noise‐Ratio Over 89 000

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(16)

Published: Jan. 28, 2024

Abstract Photomultiplication type organic photodetectors (PM‐OPDs) exhibit obvious superiority in weak light detection due to their low dark current density ( J D ) and large photo‐induced PI ). The is one of the important parameters that influences sensitivity PM‐OPDs, how effectively suppress a great challenge improve performance PM‐OPDs. In this work, PM‐OPDs can be suppressed by employing PTAA or doped‐PTAA as interfacial layer replacing PEDOT:PSS layer. with 2.3 × 10 −7 A cm −2 under −6 V bias, which much smaller than 1.4 for small molecule DRCN5T incorporated into further passivate surficial defects films, conducive reducing leakage optimal rather 8.4 −8 well external quantum efficiency (EQE) 31700% specific detectivity (D*) 1.2 13 Jones at 370 nm. signal‐noise‐ratio arrives 89600 −4.5 bias white illumination intensity 1.5 mW .

Language: Английский

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Over 18.2% efficiency of layer–by–layer all–polymer solar cells enabled by homoleptic iridium(III) carbene complex as solid additive

Science Bulletin, Journal Year: 2024, Volume and Issue: 69(18), P. 2862 - 2869

Published: July 15, 2024

Language: Английский

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Over 19.2% efficiency of layer-by-layer organic photovoltaics enabled by a highly crystalline material as an energy donor and nucleating agent

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 5173 - 5182

Published: Jan. 1, 2024

By introducing highly crystalline material D18A into donor layer acting as energy and nucleating agent, an optimal PCE of 19.25% was achieved for PM1 : D18A/L8-BO based OPVs.

Language: Английский

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Over 17.1% or 18.2% Efficiency of Layer-by-Layer All-Polymer Solar Cells via Incorporating Efficient Pt Complexes as Energy Donor Additive

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(7), P. 2964 - 2973

Published: June 12, 2024

Layer-by-layer (LbL) all-polymer solar cells (APSCs) are constructed with or without the incorporation of a Pt complex F-Pt as an energy donor additive in acceptor layer. The power conversion efficiency (PCE) LbL APSCs can be enhanced from 15.86% to 17.14% through introducing 0.2 wt % PY-IT layer, originating efficient transfer PM6 and PY-IT. well confirmed spectral overlapping between photoluminescence (PL) spectra absorption PY-IT, prolonged PL lifetime according transient time-resolved blend films. universality strategy further PBQx-TCl/PY-DT based APSCs, PCE increased 17.57% 18.29% by incorporating into PY-DT

Language: Английский

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Efficient Dual Mechanisms Boost the Efficiency of Ternary Solar Cells with Two Compatible Polymer Donors to Exceed 19%

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)

Published: Feb. 9, 2024

Abstract Ternary strategyopens a simple avenue to improve the power conversion efficiency (PCE) of organic solar cells (OSCs). The introduction wide bandgap polymer donors (PDs) as third component canbetter utilize sunlight and mechanical thermal stability active layer. However, efficient ternary OSCs (TOSCs) with two PDs are rarely reported due inferior compatibility shortage match acceptors. Herein, PDs‐(PBB‐F PBB‐Cl) adopted in dual‐PDs systems explore underlying mechanisms their photovoltaic performance. findings demonstrate that components exhibit excellent miscibility PM6 embedded host donor form alloy‐like phase. A more profound mechanism for enhancing through dual mechanisms, guest energy transfer charge transport at donor/acceptor interface, has been proposed. Consequently, PM6:PBB‐Cl:BTP‐eC9 TOSCs achieve PCE over 19%. Furthermore, better than binary reduction spatial site resistance resulting from tightly entangled long‐chain structure. This work not only provides an effective approach fabricate high‐performance TOSCs, but also demonstrates importance developing compatible PD materials.

Language: Английский

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A platinum-based photothermal polymer with intermolecular/ligand-to-ligand charge transfer for efficient and sustainable solar-powered desalination

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(15), P. 9055 - 9065

Published: Jan. 1, 2024

A platinum-based organometallic polymer is developed with a broad absorption spectrum and high photo-to-thermal conversion capability, which can be used to fabricate solar evaporator for seawater desalination operational stability.

Language: Английский

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Cascaded Energy and Charge Transfer Synergistically Prompting 18.7% Efficiency of Layered Organic Solar Cells with 1.48 eV Bandgap

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

Published: Jan. 2, 2025

Abstract Series of layer‐by‐layer organic solar cells (LOSCs) are constructed by sequentially spin‐coating donor layer and acceptor layers. A champion power conversion efficiency (PCE) 18.79% is achieved from the LOSCs with PBQx‐TCl/ITIC/PY‐DT as active layers, which should be one top values among OSCs optical bandgap over 1.48 eV. The middle material ITIC has a complementary photon harvesting range PBQx‐TCl PY‐DT, leading to enhanced Meanwhile, can play vital role in energy charge transfer relay increase exciton utilization transport, confirmed varied FFs normal or inverted ITIC/PY‐DT PY‐DT/ITIC Over 7% PCE improvement employing form cascaded This work may provide an efficient strategy for improving performance LOSCs.

Language: Английский

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Non-fullerene acceptors with high crystallinity and photoluminescence quantum yield enable >20% efficiency organic solar cells

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

Published: Jan. 29, 2025

Language: Английский

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