Interface Engineering for Highly Efficient Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(16)

Опубликована: Март 3, 2023

Organic solar cells (OSCs) have made dramatic advancements during the past decades owing to innovative material design and device structure optimization, with power conversion efficiencies surpassing 19% 20% for single-junction tandem devices, respectively. Interface engineering, by modifying interface properties between different layers OSCs, has become a vital part promote efficiency. It is essential elucidate intrinsic working mechanism of layers, as well related physical chemical processes that manipulate performance long-term stability. In this article, advances in engineering aimed pursue high-performance OSCs are reviewed. The specific functions corresponding principles summarized first. Then, anode layer, cathode layer interconnecting devices discussed separate categories, engineering-related improvements on efficiency stability analyzed. Finally, challenges prospects associated application emphasis large-area, high-performance, low-cost manufacturing.

Язык: Английский

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Machine Learning for Organic Photovoltaic Polymers: A Minireview

Chinese Journal of Polymer Science, Год журнала: 2022, Номер 40(8), С. 870 - 876

Опубликована: Июнь 21, 2022

Язык: Английский

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Harnessing the Structure‐Performance Relationships in Designing Non‐Fused Ring Acceptors for Organic Solar Cells

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(21)

Опубликована: Фев. 17, 2023

Abstract The prerequisite for commercially viable organic solar cells (OSC) is to reduce the efficiency‐stability‐cost gap. Therefore, cost of materials should be reduced by minimizing synthetic steps, yet maintaining molecular planarity and efficiencies achieved fused ring acceptors (FRA). In this respect, developing non‐fused (NFRA) with suitable functionalization favor conformational effective packing beneficial cost‐effective. Presently, power conversion efficiency (PCE) NFRAs around 16 %, lower than 19 % FRAs. Despite their potential, a thorough understanding structural design necessary efficient OSCs. This article pays special attention concept developed in last years analyzed approach toward improvement, an important step technological application.

Язык: Английский

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Dithienoquinoxalineimide‐Based Polymer Donor Enables All‐Polymer Solar Cells Over 19 % Efficiency

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(21)

Опубликована: Фев. 22, 2024

All-polymer solar cells (all-PSCs) have been regarded as one of the most promising candidates for commercial applications owing to their outstanding advantages such mechanical flexibility, light weight and stable film morphology. However, compared large amount new-emerging excellent polymer acceptors, development high-performance donor lags behind. Herein, a new D-π-A type donor, namely QQ1, was developed based on dithienoquinoxalineimide (DTQI) A unit, benzodithiophene with thiophene-conjugated side chains (BDTT) D alkyl-thiophene π-bridge, respectively. QQ1 not only possesses strong dipole moment, but also shows wide band gap 1.80 eV deep HOMO energy level -5.47 eV, even without halogen substituents that are commonly indispensable donors. When blended classic acceptor PY-IT, QQ1-based all-PSC delivers an PCE 18.81 %. After introduction F-BTA3 third component, record 19.20 % obtained, highest value reported so far all-PSCs. The impressive photovoltaic performance originates from broad absorption range, reduced loss, compact π-π stacking. These results provide insight in rational design novel nonhalogenated donors further

Язык: Английский

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Oligothiophene Additive‐Assisted Morphology Control and Recombination Suppression Enable High‐Performance Organic Solar Cells

Advanced Energy Materials, Год журнала: 2024, Номер 14(11)

Опубликована: Янв. 9, 2024

Abstract Tuning the morphology through processing additives represents one of most promising strategies to boost performance organic solar cells (OSCs). However, it remains unclear how oligothiophene‐based solid influence molecular packing and OSCs. Here, two namely 2T 4T, are introduced into state‐of‐the‐art PM6:Y6‐based OSCs understand they film formation process, nanoscale morphology, photovoltaic performance. It is found that additive can improve both donor polymer non‐fullerene acceptor, resulting in lower Urbach energy reduced loss. Furthermore, blend with treatment displays enhanced domain purity a more favorable distribution acceptor materials vertical direction, which enhance charge extraction efficiency while simultaneously suppressing recombination. Consequently, processed realize 18.1% for devices. general applicability demonstrated, an impressive 18.6% PM6:L8‐BO‐based achieved. These findings highlight uncomplicated oligothiophenes have excellent potential fine‐adjustment active layer crucial future development

Язык: Английский

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Molecular modification: A promising strategy for the design of donor-acceptor-type organic polymers photocatalyst

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 352, С. 124043 - 124043

Опубликована: Апрель 21, 2024

Язык: Английский

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Insight Into Designing High‐Performance Polythiophenes for Reduced Urbach Energy and Nonradiative Recombination in Organic Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Апрель 18, 2024

Abstract In the pursuit of high‐efficiency polythiophene (PT) organic solar cells (OSCs), a critical challenge is reduction nonradiative recombination. This study comprehensively explores polydithienylthiazolothiazole (PTTz)‐based PT terpolymers: PTTz‐Tz and PTTz‐TzT, in which it demonstrate that molecular structure alterations greatly influence aggregation kinetics orientation these polymers. Specifically, PTTz‐TzT achieves rapid ordering during spin coating, effectively suppressing excessive polymer facilitating appropriate phase separation upon mixing with acceptor. Meanwhile, inherently adopts face‐on orientation, resulting more structured π–π stacking vertical direction after acceptor integration, compared to intrinsic edge‐on PTTz‐Tz. These factors collectively contribute lower Urbach energy substantial recombination PTTz‐TzT‐based OSCs, culminating high photovoltaic conversion efficiency (PCE) exceeding 16%. Furthermore, prominent PCE 19.11% obtained by via ternary blend strategy, among highest values reported for OSCs. investigation underscores significance PT‐based polymers, especially regarding recombination, offers novel insights designing high‐performance donors.

Язык: Английский

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High-efficiency organic solar cells processed from a real green solvent

Materials Horizons, Год журнала: 2022, Номер 10(2), С. 473 - 482

Опубликована: Ноя. 21, 2022

The fabrication of organic solar cells (OSCs) depends heavily on the use highly toxic chlorinated solvents, which are incompatible with industrial manufacturing. reported alternative solvents such as non-halogenated aromatic hydrocarbons and cyclic ethers also not really "green" according to "Globally Harmonized System Classification Labelling Chemicals" United Nations. Therefore, processing from real green water, alcohols, or anisole will constitute a big breakthrough for OSCs. However, it is fundamentally challenging obtain high-performance photovoltaic materials processable these solvents. Herein, we propose incorporation B-N covalent bond, has dipole moment 1.84 Debye, into conjugated backbone polymer donors fabricate high-efficiency OSCs anisole, eco-compatible solvent recommended by Based newly developed B-N-based polymer, record-high efficiency 15.65% in 0.04 cm2 device 14.01% 1.10 have thus been realized via processing.

Язык: Английский

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A Versatile and Low‐Cost Polymer Donor Based on 4‐Chlorothiazole for Highly Efficient Polymer Solar Cells

Advanced Materials, Год журнала: 2022, Номер 35(7)

Опубликована: Ноя. 23, 2022

Benefiting from the emergence of narrow-band-gap small-molecule acceptors (SMAs), especially "Y" series, power conversion efficiency (PCE) polymer solar cells (PSCs) is rapidly improved. However, donors with high efficiency, easy synthesis, and good universality are relatively scarce except PBDB-TF D18. Herein, two designed synthesized based on 4-chlorothiazole derivatives simple structures, namely PTz3Cl PBTTz3Cl. The OSCs PBTTz3Cl slightly weaker intermolecular forces in comparison to exhibits a decent PCE 18.38% blending SMA L8-BO, owing its strong donor/acceptor interaction which shapes suitable phase separation morphology. Further research finds that can exhibit excellent photovoltaic performances various materials, highlighting universality. Based this, ternary PSCs where BTP-eC9 introduced as guest into PBTTz3Cl:L8-BO host system. Thanks further optimal blend morphology more balanced charge transport, improved up 19.12%, among highest values for PSCs. This work provides new design low-cost electron-deficient units constructing highly versatile, high-performance donors.

Язык: Английский

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A structurally simple linear conjugated polymer toward practical application of organic solar cells

Energy & Environmental Science, Год журнала: 2022, Номер 15(11), С. 4789 - 4797

Опубликована: Янв. 1, 2022

PTTzF, a linear conjugated polymer donor featuring simple synthesis, high device efficiency, outstanding batch reproducibility, and good universality with different acceptors is promising candidate for practical application of organic solar cells.

Язык: Английский

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