Self‐Assembled Interlayer Enables High‐Performance Organic Photovoltaics with Power Conversion Efficiency Exceeding 20%

Advanced Materials, Год журнала: 2024, Номер 36(25)

Опубликована: Март 21, 2024

Interfacial layers (ILs) are prerequisites to form the selective charge transport for high-performance organic photovoltaics (OPVs) but mostly result in considerable parasitic absorption loss. Trimming ILs down a mono-molecular level via self-assembled monolayer is an effective strategy mitigate However, such suffers from inferior electrical contact with low surface coverage on rough surfaces and poor producibility. To address these issues, here, interlayer (SAI) developed, which involves thin layer of 2-6 nm full substrate both covalent van der Waals bonds by using molecule 2-(9H-carbazol-9-yl) (2PACz). Via facile spin coating without further rinsing annealing process, it not only optimizes optical properties OPVs, enables world-record efficiency 20.17% (19.79% certified) also simplifies tedious processing procedure. Moreover, SAI especially useful improving absorbing selectivity semi-transparent record light utilization 5.34%. This work provides optimize OPVs solar window applications.

Язык: Английский

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Compromising Charge Generation and Recombination of Organic Photovoltaics with Mixed Diluent Strategy for Certified 19.4% Efficiency

Advanced Materials, Год журнала: 2023, Номер 35(21)

Опубликована: Март 3, 2023

The ternary blend is demonstrated as an effective strategy to promote the device performance of organic photovoltaics (OPVs) due dilution effect. While compromise between charge generation and recombination remains a challenge. Here, mixed diluent for further improving efficiency OPV proposed. Specifically, high-performance system with polymer donor, i.e., PM6, nonfullerene acceptor (NFA), BTP-eC9, diluted by diluents, which involve high bandgap NFA BTP-S17 low BTP-S16 (similar that BTP-eC9). better miscibility BTP-eC9 can dramatically enhance open-circuit voltage (VOC ), while maximizes or short-circuit current density (JSC ). interplay BTP-17 enables recombination, thus leading 19.76% (certified 19.41%), best among single-junction OPVs. Further analysis on carrier dynamics validates efficacy diluents balancing be attributed more diverse energetic landscapes improved morphology. Therefore, this work provides commercialization.

Язык: Английский

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Solid Additive-Assisted Layer-by-Layer Processing for 19% Efficiency Binary Organic Solar Cells

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Апрель 10, 2023

Morphology is of great significance to the performance organic solar cells (OSCs), since appropriate morphology could not only promote exciton dissociation, but also reduce charge recombination. In this work, we have developed a solid additive-assisted layer-by-layer (SAA-LBL) processing fabricate high-efficiency OSCs. By adding additive fatty acid (FA) into polymer donor PM6 solution, controllable pre-phase separation forms between and FA. This intermixed facilitates diffusion acceptor Y6 during LBL processing, due good miscibility fast-solvation FA with chloroform solution dripping. Interestingly, results in desired refined phase-separated domain vertical phase-separation structure better balance transport /collection dissociation. Consequently, binary single junction OSCs based on PM6:Y6 blend reach champion power conversion efficiency (PCE) 18.16% SAA-LBL which can be generally applicable diverse systems, e.g., PM6:L8-BO-based devices thick-film devices. The efficacy confirmed PM6:L8-BO, where record PCEs 19.02% 16.44% are realized for 100 250 nm active layers, respectively. work provides simple effective way control demonstrates promising methodology boosting industrial manufacturing

Язык: Английский

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Device Performance of Emerging Photovoltaic Materials (Version 3)

Advanced Energy Materials, Год журнала: 2022, Номер 13(1)

Опубликована: Дек. 9, 2022

Abstract Following the 2nd release of “Emerging PV reports,” best achievements in performance emerging photovoltaic devices diverse research subjects are summarized, as reported peer‐reviewed articles academic journals since August 2021. Updated graphs, tables, and analyses provided with several parameters, e.g., power conversion efficiency, open‐circuit voltage, short‐circuit current density, fill factor, light utilization stability test energy yield. These parameters presented a function bandgap average visible transmittance for each technology application, put into perspective using, detailed balance efficiency limit. The 3rd installment reports” extends scope toward triple junction solar cells.

Язык: Английский

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Intrinsically Stretchable, Highly Efficient Organic Solar Cells Enabled by Polymer Donors Featuring Hydrogen‐Bonding Spacers

Advanced Materials, Год журнала: 2022, Номер 34(50)

Опубликована: Сен. 25, 2022

Intrinsically stretchable organic solar cells (IS-OSCs), consisting of all layers, are attracting significant attention as a future power source for wearable electronics. However, most the efficient active layers OSCs mechanically brittle due to their rigid molecular structures designed high electrical and optical properties. Here, series new polymer donors (PD s, PhAmX) featuring phenyl amide (N1 ,N3 -bis((5-bromothiophen-2-yl)methyl)isophthalamide, PhAm)-based flexible spacer (FS) inducing hydrogen-bonding (H-bonding) interactions is developed. These PD s enable IS-OSCs with conversion efficiency (PCE) 12.73% excellent stretchability (PCE retention >80% initial value at 32% strain), representing best performances among reported date. The incorporation PhAm-based FS enhances ordering well Y7 acceptor, enhancing mechanical properties simultaneously. It also found that in OSCs, PhAm5:Y7 blend achieves much higher PCE 17.5% compared reference PM6:Y7 blend. impact PhAm-FS linker on photovoltaic thoroughly investigated.

Язык: Английский

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Versatile organic photovoltaics with a power density of nearly 40 W g⁻¹

Energy & Environmental Science, Год журнала: 2023, Номер 16(5), С. 2284 - 2294

Опубликована: Янв. 1, 2023

Ultra-thin OPVs with record efficiency, the highest power density and tunable colors are demonstrated. The was fabricated on a 1.3 micro-meter substrate, demonstrated efficiency of 17.32% an excellent 39.72 W g −1 .

Язык: Английский

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Enabling Highly Efficient and Thermal‐Stable Polymer Solar Cells through Semi‐Alloy Acceptors Composed of a Hinge‐Like Dimer: A Versatile Doping Protocol

Advanced Materials, Год журнала: 2023, Номер 35(36)

Опубликована: Май 22, 2023

Abstract The simultaneous improvement of power conversion efficiency (PCE) and thermal stability is a critical scientific challenge in advancing the commercial applications polymer solar cells. To address this challenge, dumbbell‐shaped dimeric acceptor, DT19, successfully designed synthesized. It incorporated as third component into PM1:BTP‐eC9 system. This ternary strategy demonstrates synergistic enhancement PCE host binary In particular, PM1:BTP‐eC9:DT19 system maintains over 90% even after heating at 120 °C for 200 h. Additionally, dimer‐doping exhibits excellent generality other four Y‐series systems outperforms containing alloy‐like acceptors terms stability. because with its hinge‐like structure, can form semi‐alloy acceptor leading to strong interchain entanglement donor, thus overcoming phase separation excessive aggregation under stress. new type material, which synergistically enhance device active layers, presents promising application prospects.

Язык: Английский

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Niobium‐Carbide MXene Modified Hybrid Hole Transport Layer Enabling High‐Performance Organic Solar Cells Over 19%

Small, Год журнала: 2023, Номер 19(23)

Опубликована: Март 8, 2023

Niobium-carbide (Nb2 C) MXene as a new 2D material has shown great potential for application in photovoltaics due to its excellent electrical conductivity, large surface area, and superior transmittance. In this work, novel solution-processable poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS)-Nb2 C hybrid hole transport layer (HTL) is developed enhance the device performance of organic solar cells (OSCs). By optimizing doping ratio Nb2 PEDOT:PSS, best power convention efficiency (PCE) 19.33% can be achieved OSCs based on ternary active PM6:BTP-eC9:L8-BO, which so far highest value among those single junction using materials. It found that addition facilitate phase separation PEDOT PSS segments, thus improving conductivity work function PEDOT:PSS. The significantly enhanced attributed higher mobility charge extraction capability, well lower interface recombination probabilities generated by HTL. Additionally, versatility HTL improve different nonfullerene acceptors demonstrated. These results indicate promising development high-performance OSCs.

Язык: Английский

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Selective halogenation of central and end-units of nonfullerene acceptors enables enhanced molecular packing and photovoltaic performance

Energy & Environmental Science, Год журнала: 2023, Номер 16(8), С. 3543 - 3551

Опубликована: Янв. 1, 2023

Qx- p -4Cl with both a para -fluorinated central unit and chlorinated end groups exhibits enhanced molecular packing, facilitating efficient charge transport, thus achieving power conversion efficiency (PCE) of 18.78% when blended donor PM6.

Язык: Английский

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Optical and electrical losses in semitransparent organic photovoltaics

Joule, Год журнала: 2024, Номер 8(2), С. 527 - 541

Опубликована: Янв. 9, 2024

Язык: Английский

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