Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(14)

Published: Jan. 22, 2023

Abstract With the emergence of ADA'DA‐type (Y‐series) non‐fullerene acceptors (NFAs), power conversion efficiencies (PCEs) organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction tandem device). The possess specific design concept, which greatly enrich NFA types excellent compatibility with many donor materials. It is gratifying to note that previously underperforming materials combine these regulated shine again. Nowadays, concept modular widely used research donors, injecting new vitality into field photovoltaics. Furthermore, also promote multicomponent devices, bilayer processing solvent engineering, additive engineering. Herein, latest progresses polymer solar cells efficiency over 17% are briefly reviewed from aspects active material design, interface development, device technology. At last, opportunities challenges commercialization future discussed.

Language: Английский

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Impact of Electrostatic Interaction on Non‐radiative Recombination Energy Losses in Organic Solar Cells Based on Asymmetric Acceptors

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(35)

Published: July 11, 2023

Reducing non-radiative recombination energy loss (ΔE3 ) is one key to boosting the efficiency of organic solar cells. Although recent studies have indicated that Y-series asymmetric acceptors-based devices featured relatively low ΔE3 , understanding mechanism derived from molecular structure change still lagging behind. Herein, two acceptors named BTP-Cl and BTP-2Cl with different terminals were synthesized make a clear comparative study symmetric acceptor BTP-0Cl. Our results suggest exhibit larger difference electrostatic potential (ESP) in semi-molecular dipole moment, which contributes form stronger π-π interaction. Besides, experimental theoretical reveal lower ESP-induced intermolecular interaction can reduce distribution PM6 near interface enhance built-in decrease charge transfer state ratio for acceptors. Therefore, achieve higher exciton dissociation . This work establishes structure-performance relationship provides new perspective understand state-of-the-art

Language: Английский

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Impact of Electrostatic Interaction on Vertical Morphology and Energy Loss in Efficient Pseudo‐Planar Heterojunction Organic Solar Cells

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(18)

Published: Jan. 27, 2024

Abstract Although a suitable vertical phase separation (VPS) morphology is essential for improving charge transport efficiency, reducing recombination, and ultimately boosting the efficiency of organic solar cells (OSCs), there lack theoretical guidance on how to achieve ideal morphology. Herein, relationship between molecular structure VPS pseudo‐planar heterojunction (PPHJ) OSCs established by using surface electrostatic potential (ESP) as bridge. The morphological evolution mechanism revealed studying four binary systems with vary difference (∆ESP) donors (Ds) acceptors (As). findings manifest that ∆ESP increases, active layer more likely form well‐mixed phase, while smaller favors Interestingly, it also observed larger leads enhanced miscibility Ds As, resulting in higher non‐radiative energy losses (ΔE 3 ). Based these discoveries, ternary PPHJ device meticulously designed an appropriate obtain better lower ΔE , impressive 19.09% achieved. This work demonstrates optimizing ΔESP, not only formation can be controlled, but reduced, paving way further boost OSC performance.

Language: Английский

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Selenophene‐fused Perylene Diimide‐Based Cathode Interlayer Enables 19 % Efficiency Binary Organic Solar Cells via Stimulative Charge Extraction

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(37)

Published: July 2, 2024

Abstract The cathode interlayer is crucial for the development of organic solar cells (OSCs), but research on simple and efficient materials lagging behind. Here, a donor‐acceptor (D–A) typed selenophene‐fused perylene diimide (PDI) derivative (SePDI3) developed as material (CIM) OSCs, non‐fused PDI (PDI3) used control CIM comparison. Compared to PDI3, SePDI3 shows stronger self‐doping effect better crystallinity, resulting in charge transport ability. Furthermore, interaction between L8‐BO can form an extraction channel, leading superior behavior. Finally, benefitting from significantly enhanced capacity, SePDI3‐based device displays champion PCE 19.04 % with ultrahigh fill factor 81.65 binary OSCs based PM6 : active layer, which one top efficiencies reported date novel CIMs. Our work prescribes facile effective fusion strategy develop high‐efficiency CIMs OSCs.

Language: Английский

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Regulating Crystallinity Mismatch Between Donor and Acceptor to Improve Exciton/Charge Transport in Efficient Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(11)

Published: Jan. 15, 2024

Abstract Achieving a more balanced charge transport by morphological control is crucial in reducing bimolecular and trap‐assisted recombination enhancing the critical parameters for efficient organic solar cells (OSCs). Hence, facile strategy proposed to reduce crystallinity difference between donor acceptor incorporating novel multifunctional liquid crystal small molecule (LCSM) BDTPF4‐C6 into binary blend. first LCSM based on tetrafluorobenzene unit features low phase transition temperature strong self‐assembly ability, conducive regulating active layer morphology. When introduced as guest PM6 : Y6 binary, it exhibits better compatibility with primarily resides within because of similarity‐intermiscibility principle. Moreover, systematic studies revealed that could be used seeding agent enhance its crystallinity, thereby forming favourable suppressed recombination. Intriguingly, dual Förster resonance energy transfer was observed host acceptor, resulting an improved current density. This study demonstrates approach balance mobilities offers new insights boosting efficiency single‐junction OSCs beyond 20 %.

Language: Английский

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A Pseudo Planar Heterojunction Structure for Eco‐Friendly Printable Organic Solar Cells Achieving 19.05% Efficiency

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: April 27, 2024

Abstract Obtaining a well‐accurate vertical distribution active layer morphology through the air‐printing process is an essential task for achieving efficient scalable large‐area organic solar cells (OSCs). In this target, desired and controllable pseudo planar heterojunction (PPHJ) structure with suitable phase separation developed by pre‐deposited D18‐Cl under PM6:BTP‐eC9 film via eco‐friendly manufacturing method. The addition of regulates molecular crystallization leads to ideal stratification while simultaneously suppressing voltage loss, optimizing energetic disorder, carrier management. Impressively, optimal PPHJ devices perform superior power conversion efficiencies (PCEs) 19.05% (100 nm), 17.33% (300 14.14% (4 cm 2 ) compared BHJ devices. Importantly, OSCs also exhibit impressive extrapolated T 80 (the time required reach 80% initial PCE) long‐time storage operational stability, as well thermal stability.

Language: Английский

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Powering the Future: A Critical Review of Research Progress in Enhancing Stability of High‐Efficiency Organic Solar Cells

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(50)

Published: Aug. 21, 2023

Abstract Organic solar cells (OSCs) are a promising photovoltaic technology that employs organic semiconductor material as the photoactive layer, which has unique advantages of light weight, large‐area flexible fabrication, low‐cost, and semitransparent. In recent years, performance OSCs been significantly improved, highest power conversion efficiency exceeded 19%. Despite tremendous progress in OSCs, major bottleneck realizing commercialization is device stability. Therefore, reviewing research on stability high‐performance urgent necessary. This review discusses factors limiting lifetime, such metastable morphology, air, irradiation, heat, mechanical stresses. Additionally, this presents over last 5 focusing enhancing from perspective layers other functional layers, includes design engineering, solid additives, optimizing buffer using stable electrodes, encapsulation. Lastly, explores current challenges prospects, including advanced machine learning techniques to assist experimental research.

Language: Английский

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Polymer‐Entangled Spontaneous Pseudo‐Planar Heterojunction for Constructing Efficient Flexible Organic Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(7)

Published: Oct. 30, 2023

Abstract Flexible organic solar cells (FOSCs) have attracted considerable attention from researchers as promising portable power sources for wearable electronic devices. However, insufficient conversion efficiency (PCE), intrinsic stretchability, and mechanical stability of FOSCs remain severe obstacles to their application. Herein, an entangled strategy is proposed the synergistic optimization PCE properties through green sequential printing combined with polymer‐induced spontaneous gradient heterojunction phase separation morphology. Impressively, toughened‐pseudo‐planar (Toughened‐PPHJ) film exhibits excellent tensile a crack onset strain (COS) 11.0%, twice that reference bulk (BHJ) (5.5%), which among highest values reported state‐of‐the‐art polymer/small molecule‐based systems. Finite element simulation stress distribution during bending confirms Toughened‐PPHJ can release residual well. Therefore, this optimal device shows high (18.16%) enhanced (short‐circuit current density) J SC suppressed energy loss, significant improvement over conventional BHJ (16.99%). Finally, 1 cm 2 flexible retains more than 92% its initial (13.3%) after 1000 cycles. This work provides feasible guiding idea future supplies.

Language: Английский

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Enhancing photostability and power conversion efficiency of organic solar cells by a “sunscreen” ternary strategy

Science China Chemistry, Journal Year: 2023, Volume and Issue: 66(4), P. 1179 - 1189

Published: March 10, 2023

Language: Английский

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In‐Situ Removable Solid Additive Optimizing Active Layer and Cathode Interlayer of Organic Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(40)

Published: July 21, 2024

Abstract In situ removable (ISR) solid additive can employ cold sublimation process to optimize active layer morphology for organic solar cells (OSCs), thus remaining unique potential. Herein, a feasible guideline is proposed discover new ISR 1‐bromo‐4‐chlorobenzene (CBB), whose removing time ( T R ) between those of reported additives 1,4‐dichlorobenzene (DCB) and 1‐chloro‐4‐iodobenzene (CIB). The CBB with moderate beneficial affording the optimal achieving highest power conversion efficiency (PCE) 18.58% D18:L8‐BO binary layer, as supported by most efficient exciton splitting, fastest transfer, balanced carrier transports. Due ability, DCB, CBB, CIB are further aggregation PDINN cathode interlayer. Particularly, CBB‐ CIB‐treated interlayers afforded based OSCs excellent PCEs 19.38% 19.26%, along remarkable fill factors 80.98% 81.37%, respectively. suppress non‐radiative recombination devices, resulting in higher open‐circuit voltage. This work not only provides an effective approach flourish but also expands application OSCs.

Language: Английский

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