Co-adsorbed self-assembled monolayer enables high-performance perovskite and organic solar cells

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Сен. 1, 2024

Self-assembled monolayers (SAMs) have become pivotal in achieving high-performance perovskite solar cells (PSCs) and organic (OSCs) by significantly minimizing interfacial energy losses. In this study, we propose a co-adsorb (CA) strategy employing novel small molecule, 2-chloro-5-(trifluoromethyl)isonicotinic acid (PyCA-3F), introducing at the buried interface between 2PACz perovskite/organic layers. This approach effectively diminishes 2PACz's aggregation, enhancing surface smoothness increasing work function for modified SAM layer, thereby providing flattened with favorable heterointerface perovskite. The resultant improvements crystallinity, minimized trap states, augmented hole extraction transfer capabilities propelled power conversion efficiencies (PCEs) beyond 25% PSCs p-i-n structure (certified 24.68%). OSCs CA achieve remarkable PCEs of 19.51% based on PM1:PTQ10:m-BTP-PhC6 photoactive system. Notably, universal also been achieved other two popular OSC systems. After 1000-hour maximal point tracking, encapsulated retain approximately 90% 80% their initial PCEs, respectively. introduces facile, rational, effective method to enhance performance SAMs, realizing efficiency breakthroughs both device structure, along improved operational stability. are essential high Here, authors develop molecule provide heterointerface, devices.

Язык: Английский

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Extending Exciton Diffusion Length via an Organic‐Metal Platinum Complex Additive for High‐Performance Thick‐Film Organic Solar Cells

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 2025

The long exciton diffusion length (LD) plays an important role in promoting dissociation, suppressing charge recombination, and improving the transport process, thereby performance of organic solar cells (OSCs), especially thick-film OSCs. However, limited LD hinders further improvement device as film thickness increases. Here, organic-metal platinum complex, namely TTz-Pt, is synthesized served a solid additive into D18-Cl:L8-BO system. addition TTz-Pt enhanced crystallinity blends, reduced energy disorder, trap density, decreased non-radiative recombination binding energy, which conducive to prolonging TTz-Pt-treated film, facilitating dissociation process along with inhibiting recombination. Consequently, D18:L8-BO:IDIC (100 nm) exhibits champion power conversion efficiency (PCE) 20.12% (certified 19.54%), one highest PCEs reported for OSCs date. Remarkably, record-breaking PCE 18.84% yielded active layer 300 nm. Furthermore, superior universality This work provides simple universal approach extending by introducing complex achieve highly efficient

Язык: Английский

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Double Hole Transport Layers Enable 20.42% Efficiency Organic Solar Cells by Aggregation Control of Self‐Assembled Molecules on Cobalt Salt Surfaces

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Heterojunction interfaces play a crucial role in charge carrier transport, influencing the overall photovoltaic performance of organic solar cells (OSCs). Despite importance, advancements interfacial engineering, especially optimizing microstructure and nanomorphology, have not kept pace with research on photoactive layers. In study, strategy is explored to control self-assembly growth alcohol-soluble Me-4PACz (4P) used as hole transport layer (HTL) OSCs. The surface architecture modified inorganic Co salts via Cu doping UV-ozone treatments, creating smooth top an increased Co3+/Co2+ ratio hydroxyl groups. This meticulous design fine-tuned assembly behavior self-assembled molecules, resulting transition from spherical aggregates more uniform worm-like morphology. Additionally, electrical optical properties are optimized passivate defects enhance wettability solvents, leading improved extraction reduced recombination losses. Consequently, OSC Cu-Co/4P HTL exhibited highest power conversion efficiency 20.42% (certified 20.20%). characteristic universality stability make potential candidate for widespread applications, particularly providing rationalized guidance further

Язык: Английский

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A Novel Upside‐Down Thermal Annealing Method Toward High‐Quality Active Layers Enables Organic Solar Cells with Efficiency Approaching 20%

Advanced Materials, Год журнала: 2024, Номер 36(47)

Опубликована: Окт. 9, 2024

Abstract The emerging non‐fullerene acceptors with low voltage losses have pushed the power conversion efficiency of organic solar cells (OSCs) to ≈20% auxiliary morphology optimization. Thermal annealing (TA), as most widely adopted post‐treatment method, has been playing an essential role in realizing potential various material systems. However, procedure TA, i.e., way that TA is performed, almost identical among thousands OSC papers since ≈30 years ago other than changes temperature and time. Herein, a reverse thermal (RTA) technique developed, which can enhance dielectric constant active layer film, thereby producing smaller Coulomb capture radius (14.93 nm), meanwhile, forming moderate nano‐scale phase aggregation more favorable face‐on molecular stacking orientation. Thus, this method reduce decline open circuit conventional by achieving decreased radiative (0.334 eV) non‐radiative (0.215 recombination loss. RTA PM6:L8‐BO‐X device increases 19.91% (certified 19.42%) compared (18.98%). It shown exhibits superb universality 4 systems, revealing its dramatic be employed wide range OSCs.

Язык: Английский

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Binary Organic Solar Cells with >19.6% Efficiency: The Significance of Self-Assembled Monolayer Modification

ACS Energy Letters, Год журнала: 2024, Номер 9(9), С. 4209 - 4217

Опубликована: Авг. 1, 2024

Improving the uniformity and density of self-assembled monolayers (SAMs) is crucial to elevate photovoltaic performance organic solar cells (OSCs). Herein, we introduced small molecules 1-hydroxybenzotriazole (HOBT) modulate distribution electrical properties (4-(7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (4PADCB) on indium tin oxide (ITO) transparent electrodes in an innovative manner. The hydroxyl group HOBT interacts with phosphate SAMs, while steric repulsion exerted by backbone efficiently regulates SAMs. This led a more uniform dense SAMs ITO. Furthermore, HOBT-modified have improved crystallization vertical phase separation upper active layer. Consequently, PM6:BTP-eC9 binary OSCs based exhibit impressive PCE 19.66%. Our work presents effective strategy for regulating SAM morphology offers promising approach advancing OSCs.

Язык: Английский

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Asymmetrified Benzothiadiazole‐Based Solid Additives Enable All‐Polymer Solar Cells with Efficiency Over 19 %

Angewandte Chemie International Edition, Год журнала: 2024, Номер 64(1)

Опубликована: Авг. 24, 2024

Disordered polymer chain entanglements within all-polymer blends limit the formation of optimal donor-acceptor phase separation. Therefore, developing effective methods to regulate morphology evolution is crucial for achieving morphological features in organic solar cells (APSCs). In this study, two isomers, 4,5-difluorobenzo-c-1,2,5-thiadiazole (SF-1) and 5,6-difluorobenzo-c-1,2,5-thiadiazole (SF-2), were designed as solid additives based on widely-used electron-deficient benzothiadiazole unit nonfullerene acceptors. The incorporation SF-1 or SF-2 into PM6 : PY-DT blend induces stronger molecular packing via interaction, leading continuous interpenetrated networks with suitable phase-separation vertical distribution. Furthermore, after treatment SF-2, exciton diffusion lengths films are extended over 40 nm, favoring charge transport. asymmetrical characterized by an enhanced dipole moment, increases power conversion efficiency (PCE) PY-DT-based device 18.83 % due electrostatic interactions. Moreover, a ternary strategy boosts PCE SF-2-treated APSC 19 %. This work not only demonstrates one best performances APSCs but also offers approach manipulate using rational-designed additives.

Язык: Английский

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Optimizing of Cathode Interface Layers in Organic Solar Cells Using Polyphenols: An Effective Approach

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 22, 2024

Abstract The cathode interface layers (CILs) play a crucial role in enhancing the performance of organic solar cells (OSCs). However, challenges arise due to high work function CIL and inadequate contact with active layer, leading trap recombination poor charge extraction. In this study, novel approach is proposed improve injection extraction CILs by incorporating polyphenols, trihydroxybenzoic acid (TBA). Focusing on PDINN, its successfully reduced from 4.14 eV 3.80 obtained collection efficiency 91.23% through TBA regulation. These enhancements can be ascribed improved between layer CILs, enhanced formation fine fiber phase width inhibited recombination. As result, power conversion (PCE) binary OSCs comprising PM6: BTP‐ec9 exhibits an increase 18.2% 19.3%, placing it among one highest PCE values. Moreover, demonstrated notable applicability for another as well various systems. Overall, research underscores importance regulating modifying fully exploit their potential devices, while laying groundwork optimizing stability.

Язык: Английский

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Natural Dextran as an Efficient Interfacial Passivator for ZnO‐Based Electron‐Transport Layers in Inverted Organic Solar Cells

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 12, 2025

Abstract Compared to conventional organic solar cells (OSCs) with acidic PEDOT:PSS as the hole transport layer (HTL), inverted OSCs (i‐OSCs) zinc oxide (ZnO) electron (ETL) display significant advantages in terms of high stability. However, an obvious limitation i‐OSCs is that sol‐gel processed ZnO layers possess detrimental defects at interface, which hinders improvement its photovoltaic performance. To address this problem, a natural, and green dextran (Dex) used efficient interfacial passivator modify layer, thereby achieving enhanced device performance i‐OSCs. The introduction Dex efficiently suppresses recombination loss, resulting higher power conversion efficiencies (PCEs). Interestingly, Dex‐passivated exhibits broad applications ETL for different types i‐OSCs, including fullerene, non‐fullerene, all‐polymer OSCs, D18:Y6 system gives highest PCE 18.32%. This one values reported binary Moreover, application significantly improves stability, T 80 lifetimes based on PM6:Y6, D18:Y6, PM6:PY‐IT exceed 1500 h. These results imply excellent ZnO‐based high‐efficiency stable

Язык: Английский

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Micromolecule Postdeposition Process for Highly Efficient Inverted Perovskite Solar Cells

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер 17(9), С. 14269 - 14277

Опубликована: Фев. 24, 2025

Inverted perovskite solar cells (PSCs) have achieved great development, contributed by the advance of self-assembled monolayer (SAM) hole-transporting layers (HTLs) due to their distinctive molecular designability. However, SAM HTLs still present challenges achieving a compact and ordered surface, resulting in vacancies defects at interface as well adversely affecting growth perovskites. In this work, we propose micromolecule postdeposition process design HTL form high-quality perovskites achieve highly efficient inverted PSCs. We introduce etidronic acid (EA) fill reduce improve growing The EA can anchor substrate through P-OH anchors, occupying left MeO-4PACz, simultaneously create interaction with P═O C-OH functional groups. effectively fills reduces interface, passivates perovskites, facilitates carrier transport. Consequently, champion PCE 24.42% is for target PSCs, which much higher than efficiency (20.08%) control. This research provides guided widely applicable strategy development further advances performance

Язык: Английский

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Diphosphonic acid-modified PEDOT:PSS for enhanced stability and efficiency in organic solar cells: Achieving 19.5% PCE through PSS erosion mitigation and interface Optimization

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161453 - 161453

Опубликована: Март 1, 2025

Язык: Английский

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