Post-Treatment Free Yttrium Phosphotungstate Anode Interfacial Material for Organic Solar Cells with 20.55% Efficiency

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2045 - 2051

Published: April 1, 2025

Language: Английский

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Volatile Imide Additives with Large Dipole and Special Film Formation Kinetics Enable High‐Performance Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Large dipole moment additives have strong interactions with the host materials, which can optimize morphology and improve photovoltaic performance of organic solar cells (OSCs). However, these are difficult to remove due their intermolecular interactions, may impair stability. Developing volatile large moments is challenging. Herein, we first report imide that could effectively OSCs through modification. Three N-(o-chlorophenyl)phthalimide (oClPA), N-(m-chlorophenyl)phthalimide (mClPA), N-(p-chlorophenyl)phthalimide (pClPA) were screened investigate effort positional isomerization on molecular configuration interaction. These (ClPAs) larger (2.0664 Debye for oClPA, 4.2361 mClPA, 4.7896 pClPA) compared reported solid additives. In contrast traditional simultaneous nucleation crystal growth, ClPAs induce acceptor nucleate then grow, contributes forming high-quality domains better crystallinity. To our knowledge, this unique film formation kinetics was first. The power conversion efficiency (PCE) based PM6:BTP-eC9 treated pClPA improved from 16.13 % 18.58 %. Additive also performed well in PM6:L8-BO, PM6:Y6, D18:L8-BO systems, a high PCE 19.04 achieved. Our results indicate using unit construct simple effective strategy, halogen atom has effect performance.

Language: Английский

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Green-Solvent-Processed All-Polymer Solar Cells with Enhanced Efficiency and Stability through Molecular Design and Side-Chain Engineering

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

Published: March 12, 2025

Green-solvent-processed all-polymer solar cells (AP-SCs) are regarded as an excellent candidate for renewable energy due to their better stability and eco-friendly features. Two polymers, PYF-U PYF-BO, have been designed by introducing a Y-series derivative with difluoro-substituted dicyanindenone units difluorobenzotriazole the first second electron-deficient (A) units, respectively. The introduction of two additional F atoms on leads more coplanar backbone because noncovalent interactions. Compared polymer undecyl chains thiophene, PYF-BO 2-butyloctyl exhibits stronger intermolecular aggregation during film-forming process, dominant face-on molecular packing, higher crystallinity in films. Therefore, PM6:PYF-BO AP-SC achieves efficiency 15.38%, outperforming that PM6:PYF-U device (14.27%). Moreover, former longer T80 lifetime (1789 h) than latter (826 under thermal aging at 65 °C packing morphology. Our research demonstrates combining interactions enhance coplanarity polymeric side-chain engineering optimize blend-film morphology is one efficient strategies developing high-performance acceptors.

Language: Английский

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Volatile Imide Additives with Large Dipole and Special Film Formation Kinetics Enable High‐Performance Organic Solar Cells

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Abstract Large dipole moment additives have strong interactions with the host materials, which can optimize morphology and improve photovoltaic performance of organic solar cells (OSCs). However, these are difficult to remove due their intermolecular interactions, may impair stability. Developing volatile large moments is challenging. Herein, we first report imide that could effectively OSCs through modification. Three N ‐( o ‐chlorophenyl)phthalimide ( ClPA), m p ClPA) were screened investigate effort positional isomerization on molecular configuration interaction. These (ClPAs) larger (2.0664 Debye for ClPA, 4.2361 4.7896 compared reported solid additives. In contrast traditional simultaneous nucleation crystal growth, ClPAs induce acceptor nucleate then grow, contributes forming high‐quality domains better crystallinity. To our knowledge, this unique film formation kinetics was first. The power conversion efficiency (PCE) based PM6:BTP‐eC9 treated ClPA improved from 16.13 % 18.58 %. Additive also performed well in PM6:L8‐BO, PM6:Y6, D18:L8‐BO systems, a high PCE 19.04 achieved. Our results indicate using unit construct simple effective strategy, halogen atom has effect performance.

Language: Английский

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Rational halogenation on aromatic-core of tethered small molecule acceptors for high-performance polymer solar cells

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162657 - 162657

Published: April 1, 2025

Language: Английский

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Near-Infrared absorbing A–π–D–π–A small molecule Driven by simple intramolecular noncovalent Bonds for efficient organic solar cells with enhanced visible transmittance

Journal of Photochemistry and Photobiology A Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 116449 - 116449

Published: April 1, 2025

Language: Английский

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Medium-Band-Gap, Fully Nonfused Electron Acceptors with High V_oc for High-Efficiency Binary and Ternary Organic Solar Cells

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

Published: April 28, 2025

Fully nonfused electron acceptors (FNEAs) have shown a huge potential for organic solar cells (OSCs). Herein, two medium-band-gap FNEAs, namely, 2T-BO-1 and 2T-BO-2, are developed based on the "benzene-dithiophene-benzene" skeleton, with assistance of alkoxyl side chains to form S···O conformational locks. Two FNEAs exhibit medium optical gaps (Egopt ≈1.70 eV) coupled high lowest unoccupied molecular orbital (LUMO) levels (∼ -3.71 eV), contributing enhanced open-circuit voltage (Voc) OSCs. Side chain engineering is applied regulation crystallinity, active layer morphology, orientation in films. Compared 2T-BO-1, 2T-BO-2 blend film displays homogeneous suppresses bimolecular recombination, has balanced charge mobility wide-band-gap polymer reg-PThE as donor. As result, 2T-BO-2-based device can achieve higher power conversion efficiency (PCE) 10.19% Voc 1.00 V. Subsequently, third component employed fabricate ternary A D18:L8-BO:2T-BO-2 accomplish an impressive PCE 19.37%. The research provides rational design strategy high-efficiency, FNEAs.

Language: Английский

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Highly Planar Tetramer Acceptor Constructed by Vinyl Linkage Enables Organic Solar Cells with Outstanding Efficiency

Chemistry of Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Language: Английский

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Enhancing the Thermal Stability of Organic Solar Cells by Locking Morphology with Ethyl Cellulose Additive

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

The morphology of active layer the organic solar cells (OSCs) tends to transition toward its lowest energy conformation under thermal stress, significantly limiting stability OSCs. In this study, ethyl cellulose (EC) is utilized as an additive in typical PM6:Y6 and other systems. Due strong interaction between hydroxyl groups EC heteroatoms semiconductors, their bulk heterojunction nanomorphology locked, thereby enhancing device stability. Under stress at 65 °C for 1,000 h, incorporating demonstrates excellent nearly without performance loss. Furthermore, compared control device, exhibits improved a range more stringent aging conditions. Additionally, shows broad applicability various systems, effectively This work offers promising approach developing stable structures

Language: Английский

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Controlling Morphology and Improving Stability with High-Boiling-Point Additive for Efficient Organic Solar Cells

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

Published: March 17, 2025

The rapid advancement of solar photovoltaic technology underscores the growing significance organic cells (OSCs) in renewable energy solutions. A critical challenge optimizing OSC performance lies achieving precise control over active layer nanomorphology. In this study, we innovatively introduce a high-boiling-point liquid additive, 1,2,4-trichlorobenzene (1,2,4-TCB), as superior alternative to conventional additive 1,8-diiodooctane (DIO). Compared DIO, 1,2,4-TCB significantly enhances molecular ordering acceptors and improves miscibility between donor (D18) acceptor (Y6) materials, leading notable increase power conversion efficiency (PCE) from 17.56% 18.80%. It has been revealed that promotes packing, particularly for molecules grazing incidence wide-angle X-ray scattering. contact angle measurements further demonstrate improved donor–acceptor miscibility, resulting an optimized bicontinuous interpenetrating network morphology. This morphology effectively exciton separation, facilitates charge transport, minimizes recombination losses. addition improvements, 1,2,4-TCB-based devices exhibit exceptional photostability (T80 = 981 h) storage stability 2708 h), outperforming their DIO-based counterparts. These findings not only establish potential additives like boosting but also provide promising strategy advance commercial viability technology.

Language: Английский

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