Boosting the Efficiency of Perovskite/Organic Tandem Solar Cells via Enhanced Near‐Infrared Absorption and Minimized Energy Losses

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(45)

Published: Sept. 18, 2024

Abstract The compatibility of perovskite and organic photovoltaic materials in solution processing provides a significant advantage the fabrication high‐efficiency perovskite/organic tandem solar cells. However, additional recombination losses can occur during exciton dissociation materials, leading to energy near‐infrared region devices. Consequently, ternary rear subcell is designed containing two narrow‐bandgap non‐fullerene acceptors enhance absorption light. Simultaneously, unique diffusion‐controlled growth technique adopted optimize morphology active layer, thereby improving efficiency. This innovation not only broadens range light but also facilitates generation effective excitons. Owing these technological improvements, power conversion efficiency (PCE) cells increased 19.2%. Furthermore, wide‐bandgap front integrated with develop cell. reduction loss, PCE this device significantly improved, reaching 24.5%.

Language: Английский

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Effective Regulation of Morphologies and Exciton‐Generation Process Enables Quasi‐Planar All‐Polymer Organic Solar Cells Exceed 18% Efficiency

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 27, 2024

Abstract Disordered polymer chain entanglements within all‐polymer blends limit the formation of optimal donor–acceptor phase separation, and thus performance organic solar cells (all‐PSCs). Considering challenge importance morphology regulation in all‐PSCs, a diluted layer‐by‐layer (N‐LBL) strategy is thereby adopted to fine‐tuning properties blends. When comparing traditional PM6:PY‐IT based bulk‐heterojunction (BHJ) film PM6/PY‐IT (LBL) film, N‐LBL which prepared from PM6 (with 3% PY‐IT) bottom layer PY‐IT 6% PM6) top layer, displayed clearer bi‐continuous fibrillar network higher exciton generation process. Benefiting these unique characters, all‐PSC consisting active exhibited short‐circuit current density over 26 mA cm −2 power conversion efficiency (PCE) 18.33%, are both than those BHJ (16.88%) LBL (17.13%) devices. Moreover, universality dilution other (PM6 PY‐DT, PY‐FT‐ o ) also demonstrated with unanimously improved device performance. This work underscores effectiveness method tuning morphologies charge dynamics for high‐performance all‐PSCs.

Language: Английский

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19.5%‐Efficiency Organic Solar Cells with High Thickness Tolerance and Exceptional Device Stability Enabled by TEMPO‐Functionalized Perylene Diimide as a Cathode Interface Layer

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 15, 2024

Abstract The cathode interface material is pivotal for achieving excellent photovoltaic performance and device stability in organic solar cells (OSCs). However, currently, few materials can simultaneously satisfy multiple criteria such as low cost, high efficiency, insensitivity to film thickness, good stability. To address this challenge, a novel perylene diimide (PDI) derivative, P‐C3T designed synthesized, by incorporating stable free radical unit TEMPO polar quaternary ammonium salt side chains. facile synthesize cost‐effective, while also exhibiting conductivity ohmic contact characteristics OSCs. When utilized the material, based on D18:L8‐BO achieves remarkable power conversion efficiency (PCE) of 19.52%, which one highest levels reported binary single‐junction Notably, devices exhibit with PCE remaining at 95% initial even thickness 40 nm. Furthermore, ‐based OSCs demonstrate exceptional storage improved light In summary, its PCE, insensitivity, stability, anticipated be promising candidate large‐area roll‐to‐roll processing

Language: Английский

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Achieving 19.3%-efficiency binary organic solar cells via synergistically dual-phases morphology control

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 506, P. 160133 - 160133

Published: Jan. 1, 2025

Language: Английский

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Efficient Perovskite/Organic Tandem Photovoltaic Devices and Large‐area Modules Featuring Thick‐Film Organic Solar Cells

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

Published: April 10, 2025

Abstract Perovskite‐organic tandem solar cells (TSCs) possess significant potential due to their unique features, such as orthogonal processing solvents, tunable bandgap, and infinite molecular designs. However, device performance is often hindered by the limited series current density, which constrained absorption of rear organic cell (OSC). Here, a fine‐grained sub‐cell matching model has been developed that enables rapid screening material combinations based on practical parameters. The indicates increasing thickness OSC layer an effective approach boost efficiency, while also reducing manufacturing challenges for large‐scale production. To mitigate charge collection issues arising from excessive thickness, contact passivation technique self‐assembled monolayer developed, minimizes non‐radiative recombination reduces Schottky barrier at interface, enabling more balanced hole‐electron transport. As result, thick‐film (300 nm) achieved record‐high efficiency 18.08% (certified 17.80%), enhancing TSCs 24.31% 24.00%). Furthermore, large‐area photovoltaic module with exceeding 18.54% (18.48 cm 2 ) demonstrated. knowledge, this represents first demonstration perovskite‐organic TSCs.

Language: Английский

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Rational Regulation of Layer‐by‐Layer Processed Active Layer via Trimer‐Induced Pre‐Swelling Strategy for Efficient and Robust Thick‐Film Organic Solar Cells

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

Published: May 8, 2025

Abstract Thick‐film (>300 nm) organic solar cells (OSCs) have garnered intensifying attention due to their compatibility with commercial roll‐to‐roll printing technology for the large‐scale continuous fabrication process. However, uncontrollable donor/acceptor (D/A) arrangement in thick‐film condition, restricted exciton splitting and severe carrier traps significantly impede photovoltaic performance operability. Herein, combined layer‐by‐layer deposition technology, a twisted 3D star‐shaped trimer (BTT‐Out) is synthesized develop trimer‐induced pre‐swelling (TIP) strategy, where BTT‐Out incorporated into buried D18 donor layer enable of OSCs. The integrated approach characterizations reveal that exceptional configuration spontaneous self‐organization behavior could pre‐swell network facilitate acceptor's infiltration accelerate formation D/A interfaces. This enhancement triggers elevated polarons amplified hole‐transfer kinetics, which essential augmented efficiency. Furthermore, regulated swelling process can initiate favorable self‐assembly L8‐BO acceptors, would ameliorate transport channels mitigate traps. As result, TIP‐modified thin‐film OSC devices achieve champion 20.3% (thin‐film) 18.8% (thick‐film) upgraded stability, among one highest performances reported

Language: Английский

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Unraveling the Formation Process of an Organic Photovoltaic Active Layer During High‐Speed Coating Via a Synergistic Concentration‐Temperature Gradient Control Strategy

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 9, 2024

Abstract The Layer‐by‐Layer (LbL) strategy has emerged as a highly effective approach for enhancing the performance of organic photovoltaics (OPVs), notably boosting light harvesting and fill factor through spectral complementarity morphology optimization. Crucially, LbL processing been found to mitigate or overcome decline in power conversion efficiency (PCE) during high‐speed blade coating. Despite these advancements, there remains scarcity research into film‐formation process corresponding control strategies printing. A novel synergistic concentration‐temperature gradient (SCTGC) aimed at achieving high‐performance LbL‐type active layers ultra‐fast coating speeds. This investigation reveals that both baseplate temperature solution concentration exert nonmonotonic regulatory influence on PCEs. Fine‐tuning proves instrumental balancing microfluidic competition within wet film, thereby facilitating stable mass transport film formation process, processability relevant OPV system. Additionally, variations crystallization kinetics under different temperatures are monitored. work sheds mechanism coating, highlighting SCTGC method.

Language: Английский

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Optimizing Molecular Packing and Film Morphology in Organic Solar Cells via Additive‐Modulated Growth Processes

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Abstract Controlling the packing feature and film morphology of active layers is precondition for achieving highly efficient organic solar cells (OSCs). The growth transition donors acceptors from solution to solid films plays an intrinsic role in shaping these features. In this study, two simple additives, cyanobenzene (CNB) 1,4‐dicyanobenzene (DCNB), are presented modulate process investigate impact behaviors on molecule quality, morphology, device performances. Both additives prolong nucleation period layers, resulting improved molecular domain purity, crystallization. This optimization enhances charge extraction efficiency as well reduces recombination losses. Consequently, devices based D18:BTP‐eC9‐4F processed with obtain a 19.43% power conversion (PCE). Furthermore, PCE 14.35% achieved bladed‐coated modules 5 cm × substrates. These findings underscore importance processes quality illustrate their fundamental relationship, which promises further advancements OSC technology.

Language: Английский

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Simultaneously improving the efficiencies of organic photovoltaic devices and modules by finely manipulating the aggregation behaviors of Y-series molecules

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

Published: Jan. 1, 2024

We have developed a novel liquid additive that boosts J -aggregation in NFAs through enhanced non-covalent interactions with the BTP core, leading to record efficiency for thick-film (≥200 nm), large-area OPV modules.

Language: Английский

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Optimizing Solar PV Systems: Balancing Cost and Efficiency for Sustainable Energy Deployment

Published: Aug. 8, 2024

Language: Английский

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