Benzo[d]thiazole Based Wide Bandgap Donor Polymers Enable 19.54% Efficiency Organic Solar Cells Along with Desirable Batch‐to‐Batch Reproducibility and General Applicability

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(21)

Published: March 4, 2023

Abstract The limited selection pool of high‐performance wide bandgap (WBG) polymer donors is a bottleneck problem the nonfullerene acceptor (NFA) based organic solar cells (OSCs) that impedes further improvement their photovoltaic performances. Herein, series new WBG polymers, namely PH‐BTz, PS‐BTz, PF‐BTz, and PCl‐BTz, are developed by using bicyclic difluoro‐benzo[d]thiazole (BTz) as block benzo[1,2‐b:4,5‐b′]dithiophene (BDT) derivatives donor units. By introducing S, F, Cl atoms to alkylthienyl sidechains on BDT, resulting polymers exhibit lowered energy levels enhanced aggregation properties. fluorinated PBTz‐F not only exhibits low‐lying HOMO level, but also has stronger face‐on packing order results in more uniform fibril‐like interpenetrating networks related PF‐BTz:L8‐BO blend. A high‐power conversion efficiency (PCE) 18.57% achieved. Moreover, good batch‐to‐batch reproducibility general applicability. In addition, ternary blend OSCs host PBTz‐F:L8‐BO PM6 guest PCE 19.54%, which among highest values OSCs.

Language: Английский

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Green-Solvent Processed Blade-Coating Organic Solar Cells with an Efficiency Approaching 19% Enabled by Alkyl-Tailored Acceptors

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Nov. 2, 2023

Abstract Power-conversion-efficiencies (PCEs) of organic solar cells (OSCs) in laboratory, normally processed by spin-coating technology with toxic halogenated solvents, have reached over 19%. However, there is usually a marked PCE drop when the blade-coating and/or green-solvents toward large-scale printing are used instead, which hampers practical development OSCs. Here, new series N -alkyl-tailored small molecule acceptors named YR-SeNF same molecular main backbone developed combining selenium-fused central-core and naphthalene-fused end-group. Thanks to -alkyl engineering, NIR-absorbing show different crystallinity, packing patterns, miscibility polymeric donor. The studies exhibit that packing, vertical distribution active layer morphologies well optimized introducing newly designed guest acceptor associated tailored chains, providing improved charge transfer dynamics stability for PM6:L8-BO:YR-SeNF-based As result, record-high approaching 19% achieved OSCs fabricated from green-solvent o -xylene high-boiling point. Notably, ternary offer robust operating under maximum-power-point tracking well-keep > 80% initial PCEs even 400 h. Our alkyl-tailored strategy provides unique approach develop high-efficiency stable OSCs, paves way industrial development.

Language: Английский

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Non‐Fully Conjugated Dimerized Giant Acceptors with Different Alkyl‐Linked Sites for Stable and 19.13 % Efficiency Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(14)

Published: Feb. 9, 2024

Abstract Achieving both high power conversion efficiency (PCE) and device stability is a major challenge for the practical development of organic solar cells (OSCs). Herein, three non‐fully conjugated dimerized giant acceptors (named 2Y‐sites, including wing‐site‐linked 2Y‐wing, core‐site‐linked 2Y‐core, end‐site‐linked 2Y‐end) are developed. They share similar monomer precursors but have different alkyl‐linked sites, offering fine‐tuned molecular absorption, packing, glass transition temperature, carrier mobility. Among their binary active layers, D18/2Y‐wing has better miscibility, leading to optimized morphology more efficient charge transfer compared D18/2Y‐core D18/2Y‐end. Therefore, D18/2Y‐wing‐based OSCs achieve superior PCE 17.73 %, attributed enhanced photocurrent fill factor. Furthermore, exhibit balance improved stability, distinguishing them within 2Y‐sites. Building on success 2Y‐wing in systems, we extend its application ternary by pairing it with near‐infrared absorbing D18/BS3TSe‐4F host. Thanks complementary absorption 300–970 nm further morphology, obtain higher 19.13 setting new benchmark dimer‐derived OSCs. This approach site engineering constructing presents promising pathway improve

Language: Английский

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Regulation of molecular orientation in organic solar cells

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 488, P. 150783 - 150783

Published: March 28, 2024

Language: Английский

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Layer‐by‐Layer Organic Solar Cells Enabled by 1,3,4‐Selenadiazole‐Containing Crystalline Small Molecule with Double‐Fibril Network Morphology

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: March 27, 2024

A double-fibril network of the photoactive layer morphology is recognized as an ideal structure facilitating exciton diffusion and charge carrier transport for high-performance organic solar cells (OSCs). However, in layer-by-layer processed OSCs (LbL-OSCs), polymer donors small molecule acceptors (SMAs) are separately deposited, it challenging to realize a fibril pure SMAs with absence tight interchain entanglement polymers. In this work, crystalline (SMDs), named TDZ-3TR SeDZ-3TR, were designed introduced into L8-BO acceptor solution, forcing phase separation molecular fibrilization. SeDZ-3TR showed higher crystallinity lower miscibility than TDZ-3TR, enabling more driving force favor better fibrilization L8-BO. On other hand, two donor polymers PM6 D18 different widths lengths put together optimize layer. The simultaneously optimization layers resulted impressive power conversion efficiency (PCE) 19.38 % LbL-OSCs.

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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High‐Performance Photoactive Polymers: Innovations in Ternary Polymerization for Solar Applications

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

Published: Feb. 2, 2025

Abstract In recent years, polymer solar cells (PSCs) have achieved rapid progress, with power conversion efficiencies (PCEs) reaching up to 20.25%, driven by significant advancements in device fabrication and active‐layer materials. The ternary polymerization strategy has proven be a straightforward effective approach for developing high‐performance photoelectric polymers incorporating third monomer into the backbone. This incorporation effectively optimizes intrinsic properties, including UV–vis absorption, energy levels, solubility, crystallinity, morphology, charge transfer, mechanical robustness, batch‐to‐batch reproducibility, stability. review highlights latest designing photoactive copolymers (both donors acceptors), particular focus on stability, potential applications commercial development. aim is provide valuable guidance development of materials using strategy.

Language: Английский

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18.6% Efficiency All‐Polymer Solar Cells Enabled by a Wide Bandgap Polymer Donor Based on Benzo[1,2‐d:4,5‐d′]bisthiazole

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: Sept. 28, 2023

The limited selection of wide bandgap polymer donors for all-polymer solar cells (all-PSCs) is a bottleneck problem restricting their further development and remains poorly studied. Herein, new polymer, namely PBBTz-Cl, designed synthesized by bridging the benzobisthiazole acceptor block chlorinated benzodithiophene donor with thiophene units application as an electron in all-PSCs. PBBTz-Cl not only possesses deep energy levels but also displays strong absorption, high-planar structure, good crystallinity, making it promising candidate organic cells. When paired narrow PY-IT, fibril-like morphology forms, which facilitates exciton dissociation charge transport, contributing to power conversion efficiency (PCE) 17.15% corresponding Moreover, when introducing another crystalline BTP-2T2F into PBBTz-Cl:PY-IT host blend, absorption ditch range 600-750 nm filled, blend optimized trap density reducing. As result, ternary all-PSCs achieve significantly improved PCE 18.60%, among highest values date.

Language: Английский

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Nickel(II) Nitrate Hole‐Transporting Layers for Single‐Junction Bulk Heterojunction Organic Solar Cells with a Record 19.02 % Efficiency

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 17, 2023

A facile strategy was developed here to improve the film quality of nickel-based hole transporting layer (HTL) for efficient organic solar cell (OSC) applications. To prevent agglomeration Ni(NO3 )2 during deposition, acetylacetonate added into precursor solution, which led formation an amorphous and glass-like state. After thermal annealing (TA) treatment, film-forming ability could be further improved. The additional UV-ozone (UVO) treatment continuously improved increased work function conductivity such HTL. resulting TA & UVO modified Hacac HTL produced highly cells with exciting power conversion efficiencies 18.42 % 19.02 PM6 : BTP-eC9 D18 BTP-Th devices, respectively, much higher than control PEDOT PSS devices.

Language: Английский

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Modified optoelectronic parameters by end-group engineering of A-D-A type non-fullerene-based small symmetric acceptors constituting IBDT core for high-performance photovoltaics

Journal of Physics and Chemistry of Solids, Journal Year: 2023, Volume and Issue: 181, P. 111495 - 111495

Published: June 16, 2023

Language: Английский

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