Binary Organic Solar Cells with 19.2% Efficiency Enabled by Solid Additive

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(25)

Published: March 25, 2023

Morphology optimization is critical for achieving high efficiency and stable bulk-heterojunction (BHJ) organic solar cells (OSCs). Herein, the use of 3,5-dichlorobromobenzene (DCBB) with volatility low cost to manipulate evolution BHJ morphology improve operability photostability OSCs proposed. Systematic simulations reveal charge distribution DCBB its non-covalent interaction active layer materials. The addition can effectively tune aggregation PBQx-TF:eC9-2Cl during film formation, resulting in a favorable phase separation reinforced molecular packing. As result, power conversion 19.2% (certified as 19.0% by National Institute Metrology) DCBB-processed PBQx-TF:eC9-2Cl-based OSCs, which highest reported value binary obtained. Importantly, devices exhibit superior have thus considerable application potential printing large-area devices, demonstrating outstanding universality various systems. study provides facile approach control enhances photovoltaic performance OSCs.

Language: Английский

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Recent progress in organic solar cells based on non-fullerene acceptors: materials to devices

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(7), P. 3255 - 3295

Published: Jan. 1, 2022

This review presents the recent progress in organic solar cells based on non-fullerene acceptors, with a wide coverage from material synthesis and processing to interface engineering, device structure, large-area fabrication, stability.

Language: Английский

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Achieving Record-Efficiency Organic Solar Cells upon Tuning the Conformation of Solid Additives

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(32), P. 14731 - 14739

Published: July 20, 2022

Volatile solid additives (SADs) are considered as a simple yet effective approach to tune the film morphology for high-performance organic solar cells (OSCs). However, structural effects of SADs on photovoltaic performance still elusive. Herein, two volatilizable were designed and synthesized. One is SAD1 with twisted conformation, while other one planar SAD2 S···O noncovalent intramolecular interactions (NIIs). The theoretical experimental results revealed that smaller space occupation can more easily insert between Y6 molecules, which beneficial form tighter intermolecular packing mode after thermal treatment. As result, SAD2-treated OSCs exhibited less recombination loss, balanced charge mobility, higher hole transfer rate, favorable morphology, resulting in record power conversion efficiency (PCE) 18.85% (certified PCE: 18.7%) single-junction binary OSCs. universality this study shed light understanding conformation performances

Language: Английский

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19.10% Efficiency and 80.5% Fill Factor Layer‐by‐Layer Organic Solar Cells Realized by 4‐Bis(2‐Thienyl)Pyrrole‐2,5‐Dione Based Polymer Additives for Inducing Vertical Segregation Morphology

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(6)

Published: Nov. 22, 2022

The morphology plays a key role in determining the charge generation and collection process, thus impacting performances of organic solar cells (OSCs). limited selection pool additives to optimize OSCs, especially for emerging layer-by-layer (LbL) impeding improvements photovoltaic performances. Herein, new method using conjugated polymers as improving LbL-OSCs is reported. Four PH, PS, PF, PCl are developed with different side chains. These exhibit poor donor materials BHJ devices, due unsuitable energy level alignment unfavorable molecular interactions. By contrast, they can be served efficient PM6 fibril matrix facilitating penetration BTP-eC9 forming an intertwined D/A bicontinuous network vertical segregation. Such optimized by chain engineering, which enables progressive improvement separation collection. As result, adding small amount additive, contributes champion PCE 19.10% high FF 80.5%.

Language: Английский

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Process‐Aid Solid Engineering Triggers Delicately Modulation of Y‐Series Non‐Fullerene Acceptor for Efficient Organic Solar Cells

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(20)

Published: March 22, 2022

Volatile solids with symmetric π-backbone are intensively implemented on manipulating the nanomorphology for improving operability and stability of organic solar cells. However, due to isotropic stacking, announced geometry cannot modify microscopic phase separation component distribution collaboratively, which will constrain promotion exciton splitting charge collection efficiency. Inspired by superiorities asymmetric configuration, a novel process-aid solid (PAS) engineering is proposed. By coupling BTP core unit in Y-series molecule, an asymmetric, volatile 1,3-dibromo-5-chlorobenzene can induce anisotropic dipole direction, elevated moment, interlaminar interaction spontaneously. Due synergetic effects favorable desired distribution, PAS-treated devices feature evident improvement splitting, transport, collection, accompanied suppressed trap-assisted recombination. Consequently, impressive fill factor 80.2% maximum power conversion efficiency (PCE) 18.5% device achieved. More strikingly, demonstrate promising thickness-tolerance character, where record PCE 17.0% yielded PAS 300 nm thickness photoactive layer, represents highest thick-film

Language: Английский

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Restrained energetic disorder for high-efficiency organic solar cells via a solid additive

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(6), P. 2637 - 2645

Published: Jan. 1, 2023

A new morphology regulation approach using solid additive, 1,3,5-trimethoxybenzene, can restrict energetic disorder and optimize the nanoscale of organic solar cells, achieves a high power conversion efficiency 19.30%.

Language: Английский

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Non-covalent interactions (NCIs) in π-conjugated functional materials: advances and perspectives

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(2), P. 454 - 472

Published: Jan. 1, 2023

We describe the role of non-covalent intermolecular interactions in design π-conjugated functional materials. highlight opto-electronic applications these materials related to their structural and photophysical properties.

Language: Английский

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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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Understanding the Role of Removable Solid Additives: Selective Interaction Contributes to Vertical Component Distributions

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)

Published: May 11, 2023

Abstract Sequentially deposited organic solar cells (SD‐OSCs) have attracted great attention owing to their ability in achieving a more favorable, vertically phase‐separated morphology avoid the accumulation of counter charges at absorber/transporting layer interfaces. However, processing SD‐OSCs is still quite challenging preventing penetration small‐molecule acceptors into polymer donor via erosion or swelling. Herein, solid additives (SAs) with varied electrostatic potential distributions and steric hinderance are introduced investigate effect evaporation dynamics selective interaction on vertical component distribution. Multiple modelings indicate that π – dominates interactions between aromatic SAs active components. Among them, p ‐dibromobenzene shows stronger while 2‐chloronaphthalene (2‐CN) interacts preferably acceptor. Combining depth‐dependent morphological study aided by multiple X‐ray scattering methods, it concluded can drive stronger‐interaction upward surface, having minor impact overall molecular packing. Ultimately, 2‐CN‐treated devices reduced acceptor concentration bottom surface deliver high power conversion efficiency 19.2%, demonstrating effectiveness applying improve OSCs using proper structure.

Language: Английский

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Electronic Configuration Tuning of Centrally Extended Non‐Fullerene Acceptors Enabling Organic Solar Cells with Efficiency Approaching 19 %

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(42)

Published: Aug. 26, 2023

In the molecular optimizations of non-fullerene acceptors (NFAs), extending central core can tune energy levels, reduce nonradiative loss, enhance intramolecular (donor-acceptor and acceptor-acceptor) packing, facilitate charge transport, improve device performance. this study, a new strategy was employed to synthesize featuring conjugation-extended electron-deficient cores. Among these, acceptor CH-BBQ, embedded with benzobisthiadiazole, exhibited an optimal fibrillar network morphology, enhanced crystallinity, improved generation/transport in blend films, leading power conversion efficiency 18.94 % for CH-BBQ-based ternary organic solar cells (OSCs; 18.19 binary OSCs) owing its delicate structure design electronic configuration tuning. Both experimental theoretical approaches were used systematically investigate influence on properties The modulation paves pathway engineering NFAs, propelling relevant research forward.

Language: Английский

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