Binary all-polymer solar cells with 19.30% efficiency enabled by bromodibenzothiophene-based solid additive

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

Published: Nov. 15, 2024

Two volatile solid additives were developed to modulate the active-layer morphology of all-polymer solar cells (all-PSCs). Among them, 4-BDBTP-treated all-PSC achieved an outstanding efficiency 19.30%.

Language: Английский

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1,4-Dimethoxynaphthalene as a Solid Additive for Improved Photovoltaic Performance in Organic Solar Cells

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

Published: Jan. 10, 2025

Morphology optimization of blend films is an essential strategy to enhance the photovoltaic performance organic solar cells (OSCs). Additive engineering effective for fine-tuning active layer morphology. Given limited efforts and achievements in designing synthesizing liquid additives, new solid additives manipulate morphology layers have gained widespread attention. Herein, 1,4-dimethoxynaphthalene (DMNA), with merits simple structure, low cost, ecofriendliness, successfully incorporated as a novel additive optimize OSCs based on D18-Cl:N3. The relationship between different DMNA contents device has been investigated. It found that can be effectively regulated by DMNA, leading enhanced molecular packing films, which favors exciton dissociation, charge transfer, suppression recombination. As result, 18.61% power conversion efficiency (PCE) obtained D18-Cl:N3 binary devices better than 17.21% PCE control device. This primarily due simultaneous increase short-circuit current density fill factor. Furthermore, general applicability confirmed other systems. These results suggest presents potential prospects regulating bulk heterojunction toward high-performance high-stability OSCs.

Language: Английский

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Organic Solar Cell with Efficiency of 20.49% Enabled by Solid Additive and Non‐Halogenated Solvent

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

Published: April 26, 2025

Abstract Recently, benzene‐based solid additives (BSAs) have emerged as pivotal components in modulating the morphology of blend film organic solar cells (OSCs). However, since almost all substituents on BSAs are weak electron‐withdrawing groups and contain halogen atoms, study with non‐halogenated strong has received little attention. Herein, an additive strategy is proposed, involving incorporation benzene ring. An effective BSA, 4‐nitro‐benzonitrile (NBN), selected to boost efficiency devices. The results demonstrate that NBN‐treated device exhibits enhanced light absorption, superior charge transport performance, mitigated recombination, more optimal compared additive‐free OSC. Consequently, D18:BTP‐eC9+NBN‐based binary D18:L8‐BO:BTP‐eC9+NBN‐based ternary OSC processed by solvent achieved outstanding efficiencies 20.22% 20.49%, respectively. Furthermore, universality NBN also confirmed different active layer systems. In conclusion, this work demonstrates introduction electron‐absorbing moieties ring a promising approach design BSAs, which can tune achieve highly efficient devices, certain guiding significance for development BSAs.

Language: Английский

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Conjugated Side‐Chains Optimize Giant Acceptor Compatibility with Low‐Cost Polymer Donor to Overcome the Cost‐Efficiency‐Stability Trilemma in Polymer Solar Cells

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

Published: May 7, 2025

Abstract Polymer solar cells (PSCs) rely on blends of small‐molecule acceptors (SMAs) and polymer donors, but the thermodynamic relaxation SMAs requires an oligomeric approach to enhance operational stability. However, high‐efficiency devices often depend expensive synthesis costly posing a significant barrier achieving sustainable renewable energy. Here, challenge is addressed through thermodynamically derived compatibility giant with low‐cost donor PTQ10. This achieved by strategically employing conjugated side chains modulate dimerize acceptors, thereby precisely tuning their properties optimize compatibility. Our synthetic route avoids toxic reagents, halogenated solvents, harsh conditions. The dimer (DYBT) incorporating n ‐type linker enhances crystallinity, absorption, intramolecular superexchange coupling compared its p counterpart, achieves device efficiency 19.53%. Considering efficiency, stability, material cost, potential cost per kilowatt for PTQ10:DYBT 0.10 $ kW −1 , while most systems exceed 10 . These findings offer valuable insights cost‐effective well pair donors reduce overall photo‐active layer durable

Language: Английский

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Asymmetrified Benzothiadiazole‐Based Solid Additives Enable All‐Polymer Solar Cells with Efficiency Over 19 %

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 137(1)

Published: Aug. 24, 2024

Abstract Disordered polymer chain entanglements within all‐polymer blends limit the formation of optimal donor‐acceptor phase separation. Therefore, developing effective methods to regulate morphology evolution is crucial for achieving morphological features in organic solar cells (APSCs). In this study, two isomers, 4,5‐difluorobenzo‐ c ‐1,2,5‐thiadiazole (SF‐1) and 5,6‐difluorobenzo‐ (SF‐2), were designed as solid additives based on widely‐used electron‐deficient benzothiadiazole unit nonfullerene acceptors. The incorporation SF‐1 or SF‐2 into PM6 : PY‐DT blend induces stronger molecular packing via interaction, leading continuous interpenetrated networks with suitable phase‐separation vertical distribution. Furthermore, after treatment SF‐2, exciton diffusion lengths films are extended over 40 nm, favoring charge transport. asymmetrical characterized by an enhanced dipole moment, increases power conversion efficiency (PCE) PY‐DT‐based device 18.83 % due electrostatic interactions. Moreover, a ternary strategy boosts PCE SF‐2‐treated APSC 19 %. This work not only demonstrates one best performances APSCs but also offers approach manipulate using rational‐designed additives.

Language: Английский

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