Self-assembled materials with an ordered hydrophilic bilayer for high performance inverted Perovskite solar cells

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 2, 2025

While self-assembled material based inverted perovskite solar cells have surpassed power conversion efficiencies of 26%, enhancing their performance in large-area configurations remains a significant challenge. In this work, we report hole-selective layer 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid, with π-expanded conjugation. The enhanced intermolecular π–π interactions facilitate the self-assembly acid molecules to form an ordered bilayer hydrophilic surface, which passivates buried interface defect and enables high-quality preparation, while simultaneously interfacial charge extraction transport. certified efficiency small-area (0.0715 cm2) device is 26.39% high stability. Furthermore, 25.21% achieved for 99.12 mm2 large area device. Qu et al. conjugation as hole selective cells. transport enable 7.15 - -devices, respectively.

Язык: Английский

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Molecular Design of Hole-Collecting Materials for Co-Deposition Processed Perovskite Solar Cells: A Tripodal Triazatruxene Derivative with Carboxylic Acid Groups

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

High-performance and cost-effective hole-collecting materials (HCMs) are indispensable for commercially viable perovskite solar cells (PSCs). Here, we report an anchorable HCM composed of a triazatruxene core connected with three alkyl carboxylic acid groups (3CATAT-C3). In contrast to the phosphonic acid-containing tripodal analog (3PATAT-C3), 3CATAT-C3 molecules can form hydrophilic monolayer on transparent conducting oxide surface, which is beneficial subsequent film deposition in traditional layer-by-layer fabrication process. More importantly, larger diffusion coefficient higher surface energy make suitable simplified, one-step co-deposition process was directly added as part precursor solution. predominantly located at bottom after spin-coating mixed solution, facilitating charge extraction. Devices fabricated by this method exhibit superior performance champion power conversion efficiency over 23%. The unencapsulated devices showed good operational stability (retaining 90% initial output 100 h), thermal durability 95% value heating 105 °C under air), excellent storage (showing no drop 8000 h). Based results time-of-flight secondary-ion mass spectroscopy (ToF-SIMS) order nuclear magnetic resonance (DOSY), elucidated effect anchoring HCMs PSCs well mechanism Our findings provide valuable insights molecular design multifunctional materials, further advancing cells.

Язык: Английский

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Scalable All‐Vacuum‐Processed Perovskite Solar Cells Enabled by Low Energy‐Disorder Hole‐Transport Layer

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Abstract As perovskite solar cells (PSCs) require higher standards for commercial applications, all vacuum‐processed PSCs should become a key in future manufacturing processes of scalable compared to their currently dominating research types based on solution processes. In fact, vacuum deposition high‐quality organic hole‐transport layers (HTLs) is crucial successful fabrication PSCs. Here, the study develops triarylamine‐based single oligomer (TAA‐tetramer)−a miniaturized‐molecular form well‐known poly(triarylamine) (PTAA)−as vacuum‐processable HTL inverted The well‐defined structure and monodisperse nature TAA‐tetramer render strong intermolecular π−π interactions and/or molecular ordering, resulting simultaneously enhanced quasi‐Fermi level splitting efficiency perovskite. all‐vacuum‐processed exhibits high power conversion (PCE) 23.2%, which record‐high performance reported among PSCs, with exceptional device stabilities. Furthermore, all‐vacuum‐deposition process allows efficient modules reliable scalability minimized loss during scale‐up. Notably, proposed enabled high‐efficiency large‐area (25 cm 2 ) single‐PSC PCE 12.3%, representing one largest active areas highest ever device. A promising strategy developing efficient, stable, all‐vacuum presented.

Язык: Английский

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Compositional and interfacial engineering for improved light stability of flexible wide-bandgap perovskite solar cells

Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Compositional and interfacial engineering for improved light stability of flexible wide-bandgap perovskite solar cells a highly efficient all-perovskite tandem device.

Язык: Английский

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Dual Interface Passivation With Multi‐Site Regulation Toward Efficient and Stable Inverted Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 23, 2025

Abstract The rapid crystallization process of perovskite produces a large number defects that remain critical factor disturbs the performance solar cells (PSCs). In this research, these challenges are mitigated by introducing multifunctional 2,6‐pyridinedicarboxylic acid chloride (PAC) as an additive into perovskite. During thermal annealing process, predominant accumulation PAC occurs at upper and buried interfaces film. possesses multiple passivating sites facilitate anchoring lead iodine defects, thereby enhancing quality material across both its dual grain boundaries. With unique property, combined with advantages enhanced crystallization, reduced non‐radiative recombination, boosted charge carrier mobility, optimal energy level alignment, PSC achieved power conversion efficiency (PCE) 25.60% maintained more than 90% after 3000 h under one equivalent light 1400 dark high temperature (85 °C). interface passivation strategy provides sustainable solution to stability environmental for commercialization cells.

Язык: Английский

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Interfacial band bending and suppressing deep level defects via Eu-MOF-mediated cathode buffer layer in an MA-free inverted perovskite solar cell with high fill factor

Energy & Environmental Science, Год журнала: 2024, Номер 17(19), С. 7234 - 7246

Опубликована: Янв. 1, 2024

To solve the problem of deep-level surface defects, lead thiocyanate is utilized in FACsPbI 3 absorber. Additionally, a novel Eu-MOF was integrated into buffer layer to regulate band alignment while impeding hole backflow at back cathode.

Язык: Английский

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Repairing Interfacial Defects in Self‐Assembled Monolayers for High‐Efficiency Perovskite Solar Cells and Organic Photovoltaics through the SAM@Pseudo‐Planar Monolayer Strategy

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Июль 30, 2024

Lately, carbazole-based self-assembled monolayers (SAMs) are widely employed as effective hole-selective layers (HSLs) in inverted perovskite solar cells (PSCs). Nevertheless, these SAMs tend to aggregate solvents due their amphiphilic nature, hindering the formation of a monolayer on ITO substrate and impeding passivation deep defects perovskites. In this study, series new including DPA-B-PY, CBZ-B-PY, POZ-B-PY, POZ-PY, POZ-T-PY, POZ-BT-PY synthesized, which interfacial repairers coated atop CNph SAM form robust SAM@pseudo-planar HSL efficient PSCs. The strategy enables well-aligned interface with perovskites, synergistically promoting crystal growth, improving charge extraction/transport, minimizing nonradiative recombination loss. As result, POZ-BT-PY-modified PSC realizes an impressively enhanced efficiency up 24.45% together fill factor 82.63%. Furthermore, wide bandgap achieving over 19% efficiency. Upon treatment monolayer, also demonstrates non-fullerene organic photovoltaics (OPVs) based PM6:BTP-eC9 blend, achieves 17.07%. Importantly, modified PSCs OPVs all show remarkably improved stability under various testing conditions compared control counterparts.

Язык: Английский

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Enhanced Indoor Perovskite Solar Cells: Mitigating Interface Defects and Charge Transport Losses with Polyarene‐Based Hole‐Selective Layers

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 29, 2024

Abstract The study designs and synthesizes non‐planar, propeller‐shaped hexaarylbenzene‐type (HAB) compound K5‐36 hexa‐ peri ‐hexabenzocoronene (HBC)‐based K5‐13 (with a cyclized core), as cost‐effective high‐yielding hole selective layers (HSLs) for perovskite solar cells (PSC). Using p–i–n device structure with ITO/4PADCB/HAB or HBC without)/perovskite/PDADI/PC 61 BM/BCP/Ag, the interaction is investigated between synthesized materials self‐assembled monolayer (4PADCB) elucidating mechanisms influencing growth of wide bandgap Cs 0.18 FA 0.82 Pb(I 0.8 Br 0.2 ) 3 perovskite. facilitates films larger grains lower defect density, while promoting energy level alignment at HSL/perovskite interface. These modifications effectively suppressed non‐radiative recombination, resulting in higher open‐circuit voltage 1.2V power conversion efficiency (PCE) exceeding 20% under AM 1.5G conditions. Under 3000K LED (1000 lux) illumination, PCE 4PADCB/ ‐based PSCs significantly increased from 38.02 ± 0.38% (4PADCB PSC) to 41.80 0.57%. Moreover, incorporating ‐ demonstrate exceptional stability, retaining ≈88.5% 98.2% their initial after 70 days storage glove box. findings highlight potential polyarene‐based HSLs promising approach improving PSC stability.

Язык: Английский

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Trade-off effect of hydrogen-bonded dopant-free hole transport materials on performance of inverted perovskite solar cells

Nano Energy, Год журнала: 2024, Номер 128, С. 109870 - 109870

Опубликована: Июнь 12, 2024

Язык: Английский

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Unraveling the Morphological and Energetic Properties of 2PACz Self‐Assembled Monolayers Fabricated With Upscaling Deposition Methods

Energy & environment materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 29, 2024

Self‐assembled monolayers (SAMs) are widely used as hole transport materials in inverted perovskite solar cells, offering low parasitic absorption and suitability for semitransparent tandem cells. While SAMs have shown to be promising small‐area devices (≤1 cm 2 ), their application larger areas has been limited by a lack of knowledge regarding alternative deposition methods beyond the common spin‐coating approach. Here, we compare upscalable such thermal evaporation spray‐coating [2‐(9H‐carbazol‐9‐yl)ethyl]phosphonic acid (2PACz), one most carbazole‐based SAMs. The impact these on device performance is investigated, revealing that technique yields higher performance. Furthermore, our work provides guidelines SAM fabrication modules. In addition, provide an extensive characterization 2PACz films focusing methods, which allow thicker deposition. It found optimal conditions corresponding highest performances do not always correlate with monolayer characteristics.

Язык: Английский

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