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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Layered All‐Polymer Solar Cells with Efficiency of 18.34% by Employing Alloyed Polymer Donors

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 7, 2025

Abstract A series of layered all‐polymer solar cells (LA‐PSCs) with the normal or inverted structure are prepared by employing a sequential spin‐coating method PBQx‐TCl, PM1 as polymer donor, and PY‐DT acceptor. The power conversion efficiency (PCE) LA‐PSCs can be improved from 17.20% to 18.34% incorporating 30 wt.% into PBQx‐TCl layer, resulting simultaneously increased J SC 25.35 mA cm −2 , V OC 0.971 FF 74.49%. PCE improvement also achieved PBQx‐TCl:PM1 donor layers. mixed prefer form alloyed states in LA‐PSCs, which confirmed gradually s more content Meanwhile, photogenerated excitons layers dissociated at interface between PM1, especially for located near ITO electrode. exciton dissociation provide an additional channel improving utilization efficiency, positive external quantum spectral difference (∆EQE) values Over 6.6% realized using layer.

Language: Английский

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Boosting the performance of ternary solar cells by fine-tuning the distribution of the third component

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162693 - 162693

Published: April 1, 2025

Language: Английский

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High Efficiency Non‐Halogenated Solvent Processed Organic Solar Cells Through Synergistic Effects of Layer‐by‐Layer and Solid Additive

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

Published: April 24, 2025

Abstract In the field of organic solar cells (OSCs), bulk heterojunction (BHJ) structure is most widely used. On contrary, layer‐by‐layer (LBL) gives a p‐i‐n separation where donor close to transparent electrode while acceptor reflective electrode, which shows be an ideal for OSCs. this work, volatile solid additives 2,5‐dibromoprazine (DBP) and 2‐bromine‐5‐iodopyrazine (BIP) are introduced regulate morphology LBL active layers. Comprehensive analysis reveals that DBP BIP can promote stronger molecular packing crystallinity BTP‐eC9, resulting in higher charge mobility, more efficient separation, suppressed bimolecular recombination significantly improve device filling factor (FF), especially devices. Consequently, by combining engineering additive BIP, outstanding power conversion efficiency (PCE) 19.63% based on PM1/BTP‐eC9 achieved further applied PM1/BTP‐eC9:eC9‐2Cl ternary system, PCE exceeded 20%. The results provide comprehensive insights into synergistic effect high‐performance photovoltaics.

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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Solubility‐Driven Acceptor Fibrilization Enables Bilayer Organic Solar Cells with Efficiency Approaching 20%

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

Published: May 15, 2025

Abstract Modulating the fibril size of non‐fullerene acceptors has emerged as a promising approach to improve exciton dissociation and charge transport in organic solar cells. While processing solvent additives can promote acceptor aggregation, achieving controlled fibrilization remains challenging due complex donor–acceptor interactions bulk heterojunctions. Herein, solubility‐driven strategy is proposed evaluate their impact on photovoltaic performance bilayer cells, circumventing complexities mixtures. By tuning mass ratio, solubility dichloromethane modulated, leading fiber formation at different length scales during film deposition. Specifically, incorporating BTP‐eC9 into L8‐BO results larger sizes with increasing content, enhancing molecular packing thin‐film crystallinity. These structural improvements boost electron mobility extraction efficiency, yielding power conversion efficiency approaching 20% devices PM6. This effective across various combinations. findings underscore critical role fine‐tuning morphology, offering pathway for advancing solution‐processed

Language: Английский

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A multifunctional strategy to improve the efficiency and stability of organic solar cells via a 2PACz/MA composite hole transport layer

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

Published: Jan. 1, 2025

A novel 2PACz/MA composite HTL strategy improves the efficiency and stability of OSCs by optimizing interface quality.

Language: Английский

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