Strategies to promote the certified efficiency of inverted perovskite solar cells above 24%: A review

Опубликована: Апрель 1, 2025

Язык: Английский

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Low‐Temperature Encapsulation with Silicone Grease Enhances Efficiency and Stability of Perovskite Solar Cells via Pb⁰ Defect Passivation

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 22, 2025

Abstract Encapsulation is a critical strategy for mitigating the instability of perovskites, which remains primary challenge their commercialization. Traditional encapsulation adhesives, such as ethylene vinyl acetate and epoxy resin, are constrained by high‐temperature processes potential chemical reactions that can impair efficiency perovskite devices. The use vacuum silicone grease, primarily composed polydimethylsiloxane (PDMS), not only shields devices from moisture oxygen but also significantly enhances power conversion 23.91% to 25.34%. Further investigations reveal this improvement be attributed formation coordination bonds between atoms in PDMS lead within structure. This mechanism boosts inhibits Pb 0 defects, contributing loss instability. A ten‐fold increase stability observed at ≈90% humidity, underscoring its low‐temperature, non‐damaging, effective method enhancing performance solar cells.

Язык: Английский

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Ultra‐Long 1D Double Perovskite CsAg_0.4Cu_1.6I₃ Single Crystal for UV Imaging Memory

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

Abstract Emerging copper‐based lead‐free perovskites have garnered significant attention for ultraviolet (UV) photodetection due to their atmospheric stability and optoelectronic properties. However, practical applications are hindered by low carrier density limited device performance. In this work, a breakthrough is reported in synthesizing ultra‐long 1D double perovskite CsAg x Cu 2‐x I 3 (0≤x≤2) single crystals (SCs) via an anti‐solvent recrystallization method. The SCs achieve unprecedented lengths of 2.2 cm 0.4 1.6 2 (CAI123), setting new benchmarks Cu/Ag‐based perovskites. By tuning the Ag‐doping ratio, bandgap continuously modulated from 3.60 3.24 eV, enabling tailored responses. optimized ‐based photodetector exhibits exceptional performance at 360 nm, with peak responsivity 82.5 mA W −1 high detectivity 1.3 × 10 12 Jones (@ 3V; light intensity: 2.8 mW −2 ), superior than CsCu (20.7 ) CAI123 (15.8 ). Notably, detector array demonstrates pioneering UV imaging memory capabilities, retaining patterns over s slow release self‐trapped defect‐related states. This work not only advances synthesis eco‐friendly but also unlocks novel functionalities next‐generation optoelectronics sensing, imaging, devices.

Язык: Английский

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Solution Deposition of High-Quality AgBiS₂ Thin Films via a Binary Diamine-Dithiol Solvent System

Опубликована: Апрель 21, 2025

Article Solution Deposition of High-Quality AgBiS₂ Thin Films via a Binary Diamine-Dithiol Solvent System Mehri Ghasemi 1,2,*, Dongxu He 2, Baohua Jia 1,* and Xiaoming Wen 1 School Science, RMIT University, Melbourne, VIC 3000, Australia 2 Chemical Engineering, University Queensland, Brisbane, QLD 4072, * Correspondence: [email protected] Received: 18 February 2025; Revised: 8 April Accepted: 10 Published: 21 2025 Abstract: Lead halide perovskites suffer from toxicity instability challenges due to their sensitivity various environmental factors, such as humidity, heat prolonged light illumination. Developing stable lead-free alternatives that can still be solution-processed has attracted significant research interests in the past years. Bismuth-based chalcogenide materials have emerged one promising candidate. In particular, silver bismuth disulfide (AgBiS2) garnered increasing interest its high absorption coefficient (105–103 cm−1 400–1100 nm range) favourable bandgap ~1.3 eV. However, poor solubility AgBiS2 precursors conventional solvents hindered solution fabrication high-quality thin-films. While previous studies explored deposition techniques spray pyrolysis, hot-injection synthesis with ligand exchange, nanocrystal ink-based situ passivation, these methods often involve complex engineering, processing costs, or achieving uniform compact thin-film. this work, we introduce novel solution-based spin-coating approach for high-quality, phase-pure thin-films, overcoming limitations precursors. By employing binary chelating solvent mixture ethylenediamine 1,2-ethanedithiol, achieve bidentate coordination metal cations, enabling dissolution Ag2S Bi2S3 through chelation-assisted mechanism. This facilitates formation films precise roughness control. method eliminates need high-temperature vacuum-assisted crystallization, significantly enhancing scalability cost-effectiveness. A planar heterojunction device architecture incorporating TiO2 electron transport layer (FTO/c-TiO2/AgBiS2/P3HT/Au) is demonstrated initial power conversion efficiency (PCE) 0.62%, offering an effective charge extraction pathway. With further passivation doping optimizations, presents new, scalable route providing alternative ligand-engineered nanocrystal-based potential advantages stability, reproducibility, manufacturing compatibility.

Язык: Английский

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Precisely Control Light Field by the Grating‐Structured Nanoimprinting Technology Toward High‐Efficiency Perovskite Solar Cells

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 16, 2025

Abstract The power conversion efficiency (PCE) of the perovskite solar cell (PSC) is constrained by Shockley–Queisser (S–Q) limit. To exceed this limit, one promising method integrating light‐trapping structures into PSCs to improve interaction between incident light and active layer. Herein, impact grating on systematically investigated from three aspects, including field simulation, experimental verification, performance analysis. simulation results demonstrate that structure modifies propagation path, thereby optimizing spatial distribution optical within This modification significantly enhances photons, leading improved absorption. Experimental validation confirms enhance absorption PSCs, increasing short‐circuit current density 23.89 25.38 mA cm −2 improving PCE 22.45% 24.63%. Furthermore, imprinting process promotes homogeneous crystal growth, improves film crystallization, reduces defect film. Overall, work highlights enormous potential in enhancing ultrathin PSC (PVK under 500 nm) decreasing cost simultaneously, which provides a way for commercialization efficient stable PSCs.

Язык: Английский

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Facilitating High‐Quality Crystal Growth of Two‐Step Sequential Processed FAPbI₃ Perovskite for Efficient Photovoltaics

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 21, 2025

Abstract The controllable two‐step deposition of perovskite films is advantageous for large‐area manufacturing. However, the incomplete reaction between initially deposited lead iodide (PbI 2 ) layer and subsequent organic ammonium salts remains a significant challenge, which ultimately degrades film quality. Differing from conventional PbI porosity regulation or ‐based intermediate phase engineering, this study innovatively introduces N‐methyl pyrrolidone (NMP) isopropylamine hydrochloride (IPACl) in salt solution to synergistically modulate crystal growth formamidinium triiodide (FAPbI 3 films. research findings suggest that coordinative solvent, NMP, can partially dissolve compact while simultaneously situ forming ‐NMP adducts, thereby promoting formation α ‐phase perovskite. Further integration IPACl plays role van der Waals interaction, enhancing oriented suppressing δ during thermal annealing. Consequently, highly crystalline FAPbI featuring enlarged grain size, more uniform morphology, smoother surface, lower defect density are demonstrated, rendering champion efficiency 25.50% processed solar cells, along with significantly improved stability. Moreover, doctor‐blade coated mini‐modules demonstrate efficiencies 20.30% 16.06% aperture areas 16 100 cm , respectively.

Язык: Английский

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Amidine-based ligand modulation of excess lead iodide facilitating efficient and stable perovskite solar cells

Nano Energy, Год журнала: 2024, Номер 131, С. 110251 - 110251

Опубликована: Сен. 10, 2024

Язык: Английский

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Managing Solvent Complexes to Amplify Ripening Process by Covalent Interaction Driving Force Under External Field for Perovskite Photovoltaic

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 17, 2024

Abstract Up to now, post‐annealing is most commonly used post treat the perovskite film accelerate ripening process. Nonetheless, top‐down crystallization mechanism impedes efficient desolvation of solvent complexes. Thus, residual complexes tend accumulate at bottom during process and deteriorate device. Here, a new strategy with unique concept promoted amplify film, in which nematic thermotropic liquid crystal (LC) molecular introduced facilitate conversion by utilizing crystalline behavior under external field. Upon concurrent application thermal force fields, covalent interaction between LC generates driving force, promotes upward migration complexes, thereby facilitating their engagement In addition, fields assists flattening grain boundary grooves. Therefore, quality improved efficiently amplified adequately handled buried interface. Based on positive effects, devices achieve champion efficiency 25.24%, sustained ≈75% its initial level even after undergoing damp heat test (85 °C/85% RH) for 1400 h.

Язык: Английский

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Pyridine-Anchored Small Molecule Interlayer Enables Defect Passivation and Enhanced Carrier Transport for Perovskite Solar Cells

The Journal of Physical Chemistry Letters, Год журнала: 2024, Номер 15(35), С. 8949 - 8955

Опубликована: Авг. 26, 2024

Engineering of the interface between perovskite and hole transport layer (HTL) has been crucial to achieving high performance. In this study, two interfacial materials, MN-CZ CN-CZ, are designed by systematically regulating group substitution site study relationship spatial conformation passivation effect. The groups CN-CZ molecules exhibit a stronger "vector addition" effect, resulting in larger molecular dipoles enhanced defect energy level regulation effects. Consequently, CN-CZ-based solar cell (PSC) shows efficiency 23.8%, which is much higher than that reference device. Meanwhile, humidity thermal stability unencapsulated device have significantly improved.

Язык: Английский

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Regulation of the Buried Interface to Achieve Efficient HTL-Free All-Inorganic CsPbI₂Br-Based Perovskite Solar Cells

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(42), С. 57412 - 57420

Опубликована: Окт. 10, 2024

The large voltage loss (Vloss) mainly stems from the mismatch between perovskite film and electron transport layer in CsPbI2Br-based all-inorganic solar cells (I-PSCs), which restricts power conversion efficiency (PCE) of devices. To address this issue, potassium benzoate (BAP) is first introduced as a bifunctional passivation material to regulate TiO2/CsPbI2Br interface, reduce Vloss, improve photovoltaic performance I-PSCs. Eventually, champion PCE I-PSCs without hole modified by BAP (Target-PSCs) improves 14.90% 12.14% reference PSCs. open-circuit (Voc) increases 1.27 V initial 1.14 after modification. A series characterizations show that modification can not only optimize energy level alignment but also passivize surface defects caused uncoordinated Cs+/Pb2+. Moreover, Target-PSCs encapsulation demonstrate better thermal stability, maintain 107.6% original annealing at 160 °C for 140 min humid air. While PSCs 76.5% their same process. This work provides simple strategy modify buried interface

Язык: Английский

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