Close‐to‐Equilibrium Crystallization for Large‐Scale and High‐Quality Perovskite Single Crystals

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 26, 2025

The growth of large semiconductor crystals is crucial for advancing modern electronics and optoelectronics. While various crystal techniques have been developed lead halide perovskites, a significant challenge remains: as size increases, performance tends to deteriorate dramatically. This study addresses the inherent limitations perovskite by designing novel strategy near-equilibrium system maintain optimal conditions throughout process. consists three independent units: solution supply unit, recycling which together ensure constant concentration temperature. By systematically optimizing temperature control feeding rates, high-quality FAPbBr3 single crystals, including notable measuring 51 × 45 10 mm3 are successfully produced. demonstrates mobility-lifetime product 2.83 10⁻2 cm2 V⁻¹ an ultralow detection limit 319.22 pGyair, significantly surpassing existing similar size. approach can serve universal platform controlled synthesis all kinds laying foundations their use in optoelectronic applications.

Language: Английский

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Perovskite Single Crystals by Vacuum Evaporation Crystallization

Advanced Science, Journal Year: 2024, Volume and Issue: 11(22)

Published: March 29, 2024

Abstract Perovskite single crystals have attracted tremendous attention owing to their excellent optoelectronic properties and stability compared typical multicrystal structures. However, the growth of high‐quality perovskite (PSCs) generally relies on temperature gradients or introduction additives promote crystal growth. In this study, a vacuum evaporation crystallization technique is developed that allows PSCs be grown under extremely stable conditions at constant without requiring The new method enables unprecedented quality, is, MAPbBr 3 exhibit an ultranarrow full width half maximum 0.00701°, which surpasses all previously reported values. addition, deliver exceptional performance, including long carrier lifetime 1006 ns, ultralow trap‐state density 3.67 × 10 9 cm −3 , ultrahigh mobility 185.86 2 V −1 s . This applicable various types PSCs, organic–inorganic hybrids, fully inorganic structures, low‐dimensional

Language: Английский

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Space-Charge-Limited Current Measurements: A Problematic Technique for Metal Halide Perovskites

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: unknown, P. 10001 - 10008

Published: Sept. 24, 2024

Space-charge-limited current (SCLC) measurements play a crucial role in the electrical characterization of semiconductors, particularly for metal halide perovskites. Accurate reporting and analysis SCLC are essential gaining meaningful insights into charge transport defect density these systems. Unfortunately, performing on perovskites is complicated by their mixed electronic-ionic conductivity. This complexity led to data often being incorrectly analyzed using simplified models unsuitable materials reported without information about how were performed. In light recently published data, common challenges perovskite addressed, solutions discussed this paper. The applicability often-used analytical models, overlooked issues related ionic-electronic conductivity perovskites, creating single-carrier devices investigated drift-diffusion simulations. Finally, guidelines more accurate improved provided.

Language: Английский

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Single‐Crystal Perovskite for Solar Cell Applications

Small, Journal Year: 2024, Volume and Issue: 20(48)

Published: Sept. 20, 2024

Abstract The advent of organic–inorganic hybrid metal halide perovskites has revolutionized photovoltaics, with polycrystalline thin films reaching over 26% efficiency and single‐crystal perovskite solar cells (IC‐PSCs) demonstrating ≈24%. However, research on remains limited, leaving a crucial gap in optimizing energy conversion. Unlike films, which suffer from high defect densities instability, offer minimal defects, extended carrier lifetimes, longer diffusion lengths, making them ideal for high‐performance optoelectronics essential understanding material behavior. This review explores the advancements potential IC‐PSCs, focusing their superior efficiency, stability, role overcoming limitations counterparts. It covers device architecture, composition, preparation methodologies, recent breakthroughs, emphasizing importance further to propel IC‐PSCs toward commercial viability future dominance photovoltaic technology.

Language: Английский

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Metal halide perovskite for room temperature gamma‐ray spectrum detection

Deleted Journal, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Abstract Radiation detection plays a critical role in areas such as homeland security, medical care, astronomical exploration, and industrial inspections. Over the past decade, metal halide perovskites (MHPs) have rapidly advanced optoelectronic applications including photovoltaics, light‐emitting diodes (LEDs), photodetectors, also radiation detection, owing to their high mobility–lifetime products, readily tunable bandgap, attenuation coefficients. Yet MHPs been extensively investigated for X‐ray detections, application γ‐ray spectrum is still its early stages, with only few compositions demonstrating capabilities. The stringent requirements of that involves photon counting post demands on well‐controlled crystal growth MHPs, minimal defects device fabrication ensures efficient charge collection. This underscores need further development MHP techniques defect engineering. In this review, we summarize current research progress room‐temperature along advances synthesizing high‐quality crystals fundamental insights gained into structural properties MHPs. Based latest achievements, discuss challenges potential future directions continued detectors.

Language: Английский

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Tetramethylurea Based Intermediate Phase Engineering for Efficient and Stable Perovskite Solar Cells

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Abstract Perovskite solar cells (PSCs) are emerging photovoltaic devices renowned for their high efficiency and low cost. Efficient stable PSCs depend on high‐quality perovskite films, which strongly influenced by the excellent nucleation growth. The choice of solvent is critical crystallization behavior films. To improve film quality address uncontrollable fast crystallization, it essential to replace traditional dimethyl sulfoxide (DMSO) solvent. In this work, tetramethylurea (TMU) ligand successfully introduced into DMSO first time. Through intermediate phase engineering, films optimized. stronger interaction between TMU solutes versus can effectively delay transition from phase, yielding with larger grains lower defects. Finally, optimized maintained stability after aging 150 h under 95% relative humidity (RH) or at 85 °C, while device increased 19.54% 21.05%. Furthermore, exhibited outstanding ≈1000 50% RH. This research provides new insights good example achieving highly efficient through engineering.

Language: Английский

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Dual Shielding Balanced Stable Photoluminescence and High Photoresponsivity in MAPbX₃–MAPbBr_nX_3–n@PbBr(OH) Core–Shell Single Crystals

Crystal Growth & Design, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Language: Английский

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High Resistivity of Single Crystal CsPbBr₃ Semiconductor for Radiation Detection via Proposed Temperature‐Concentration Balance Method

Advanced Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Abstract Lead halide perovskites have shown high performance in radiation detection techniques owing to their excellent optoelectronic properties and stability. However, the resistivity of CsPbBr 3 detector is intensively dependent on growth quality single crystal, which closely related temperature gradients or introduction additives. Herein, a crystal with grown based proposed temperature‐concentration balance (TCB) method. The prepared perfect remains repeated experiments, belongs Pnma space group, benefiting from effective Based fabricated asymmetrical Au‐In electrodes demonstrates outstanding linearity under reverse bias. It exhibits lower dark current (2.66 × 10 −2 nA) resistivity, helps acquire broader measurement range. Moreover, emission spectrum crystals sharp peak at 527 nm narrower full width half maximum, making easily couple into detectors. These findings provide insight regulation for more extensive applications future.

Language: Английский

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Flux‐Regulated Crystallization of Perovskites Using Machine Learning‐Predicted Solvent Evaporation Rates for X‐Ray Detectors

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Abstract Flux‐regulated crystallization (FRC), a method that dynamically monitors and adjusts crystal growth from solutions in real time using computer vision feedback control, has been recently introduced. Using FRC, centimeter‐scale perovskite single crystals at linear rate of 0.2 mm h −1 with standard deviation ( σ ) 0.061 is synthesized. Here, machine learning integrated into FRC to predict solvent evaporation rates during time, thus leading an over threefold decrease 0.018 . This also results improved reproducibility crystallinity, as evidenced by average full width half maximum 22 ± 5 arcsec X‐ray rocking curve measurements; detectors, sensitivity 4500 500 µC Gy air cm −2 electric field 100 V across 13 devices.

Language: Английский

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Synergy of Micro‐Nano Engineering Templates and Additives for FAPbI₃‐Based 1D Triangular Array Photodetector Fabrication

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract In optoelectronic materials, 1D arrays play a significant role in augmenting properties. FAPbI 3 is highly regarded for its nearly theoretical optimal bandgap and remarkable performance. However, black‐phase metastability high‐reflectance light loss limit practical applications. Here, low‐vacuum spatial confinement method with the synergy of NMP/MACl used to fabricate stable triangular α‐FAPbI ‐based arrays. The provides reaction pressure space, guiding precursor molecules assemble directionally, precisely defining growth mode, forming unique low‐reflective cross‐section. interact precursors, stabilizing α‐phase, reducing phase‐transition barriers, optimizing crystal growth, yielding high‐quality impact dimensionality on device performance also investigated. Photodetectors based exhibit lower defect density, broader UV–vis photoresponse, enhanced environmental stability, achieving responsivity (45.2 ± 3.0) A W −1 , detectivity (1.4 0.3) × 10 13 Jones, fast response speeds 1.2 1.3 µs. This work approach perovskites associated devices.

Language: Английский

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