Deterministic Fabrication of 2D/3D Heterojunction for Efficient and Stable Carbon-Based Hole-Transport-Layer-Free Perovskite Solar Cells

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 4, 2025

The incorporation of two-dimensional (2D) perovskite onto the three-dimensional (3D) structure presents an effective approach for passivating surface defects, optimizing energy level alignment, and stabilizing active layers in solar cells (PSCs), thereby facilitating realization highly efficient stable devices. However, it remains a formidable challenge to achieve precise composition controllable 2D/3D heterojunctions through solution processes. Additionally, uncontrolled cation exchange among organic constituents poses challenges controlling positioning thickness 2D phases, resulting mismatched band alignments unfavorable recombination. In this study, fabrication deterministic is achieved using solid-phase hot-pressing deposition method, wherein investigation focuses on their growth mechanisms, alignments, film stabilities. results demonstrate that uniform layer was formed 3D under influence applied pressure heat. heterojunction forms favorable alignment with adjacent carbon electrode, effectively enhancing charge extraction suppressing losses due interface As result, carbon-based hole-transport-layer-free (HTL-free) PSCs based outstanding power conversion efficiency (PCE) 16.09%. Moreover, enhances hydrophobicity, leading significant improvements stability. Therefore, study facile practical heterojunctions, offering potential opportunities cost reduction performance enhanced PSCs.

Language: Английский

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Micro/Nano Engineering Advances Next-Generation Flexible X-ray Detectors

ACS Nano, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 23, 2024

The growing demands for X-ray imaging applications impose diverse and stringent requirements on advanced detectors. Among these, flexibility stands out as the most expected characteristic next-generation Flexible detectors can spatially conform to nonflat surfaces, substantially improving resolution, reducing exposure dosage, enabling extended application opportunities that are hardly achievable by conventional rigid flat-panel Over past years, indirect- direct-conversion flexible have made marvelous achievements. In particular, microscale nanoscale engineering technologies play a pivotal role in defining optical, electrical, mechanical properties of this Perspective, we spotlight recent landmark advancements from aspects micro/nano strategies, which broadly categorized into two prevailing modalities: materials-in-substrate materials-on-substrate. We also discuss existing challenges hindering development detectors, well prospective research mitigate these issues.

Language: Английский

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Molecular Engineering of Melanin for Enhanced Biological γ-ray Protection

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

The escalating utilization of ionizing radiation across medicine and industry, coupled with the relentless global nuclear rivalry, underscoring paramount urgency effective radioprotective materials. Conventional materials such as lead concrete are widely used, lead-free have also emerged to solve problems cumbersome toxic lead, metal-containing micro/nano polymers. Nevertheless, there is still a significant challenge in meeting urgent need for lightweight biocompatible alternatives. To tackle this challenge, work utilizes molecular engineering melanin develop panel novel metal-free enhanced conjugation, heightened physical shielding against antioxidant properties. Remarkably, engineered demonstrated unprecedented in vivo γ-ray protection, increasing mice survival from 0–100%.

Language: Английский

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Inorganic Nanoscintillators: Current Trends and Future Perspectives

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

Published: Jan. 31, 2025

Abstract This review explores the potential of inorganic nanoscintillators for applications in detection, imaging, and therapy. It begins by comparing scintillation mechanisms bulk materials versus nanocrystals, highlighting key differences related to characteristic interaction distances. The then focuses on synthesis preparation doped insulators, including oxides fluorides, as well semiconductor quantum dots. Finally, last section discusses various where scintillating nanocrystals can offer significant advantages.

Language: Английский

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Synchronous Regulation of Charge Transfer and Defects in Perovskite Nanocomposite Films for Enhanced Sensitivity and Stability in Monolithically Integrated X‐Ray Imaging Arrays

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

Published: Jan. 31, 2025

Perovskites nanocrystals (PNCs) have garnered significant research interest in X-ray detection due to their strong absorption capability, and unique advantages large area thick film deposition that result from the decoupling of perovskite crystallization formation. However, traditional long-chain ligands used PNCs, such as oleic acid oleyl amine, suffer poor conductivity susceptibility detachment, which limits performance detectors based on them. In this study, a strategy is proposed partially replace with short-chain counterparts like phenethylammoniumbromide (PEABr) CF3PEABr, during synthesis CsPbBr3 PNCs. This approach leads lower defect density, enhanced carrier transport, suppressed ion migration simultaneously resulting These PNCs are then combined organic bulk heterojunction construct nanocomposite detectors, exhibit an impressive sensitivity 10787 µC Gyair⁻¹ cm⁻2 stable dark current baseline under electric field ≈17 000 V cm-1. Finally, flat panel imaging sensor prepared by monolithically integrating thin-film transistor backplane, enabling high-resolution real-time imaging. The image quality further through super-resolution reconstruction approach, effectively facilitating wide range practical applications real-world scenarios.

Language: Английский

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Highly stable bismuth-chloride perovskite X-ray direct detectors with an ultralow detection limit

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

By dimension manipulation and composition strategy, we achieve effective detection of X-ray with an ultralow limit 59.4 nGy s −1 long-term radiation operation. Our findings among Bi-based perovskites provide new insights for the further development in detectors.

Language: Английский

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2D Nonlayered Materials for Transistor Application

Advanced Physics Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 12, 2025

Abstract Over the past two decades since discovery of graphene, there is significant interest in two‐dimensional (2D) layered materials. However, nonlayered materials, which are far more abundant, remain underexplored. By shifting focus to 2D variety materials not only expanded but also explores advanced technologies and uncovers potential new phenomena. In this paper, recent developments reviewed controlled synthesis using chemical vapor deposition (CVD) techniques their applications electronics. Begin by categorizing extensive array based on composition crystal structure. Next, specialized CVD growth methods that suitable for discussed, enabling high‐quality specimens. The physical properties internal structure through spectroscopic studies atomic scale characterization then analyzed. Finally, these transistors, highlighting diverse uses advantages summarized. consolidating studies, future transistors proposing various research ideas technical pathways further development envisioned. This review will serve as a valuable resource guide advancement

Language: Английский

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Non-destructive testing of mechanical components achieved by hybrid copper–iodide cluster

RSC Advances, Journal Year: 2025, Volume and Issue: 15(15), P. 11639 - 11644

Published: Jan. 1, 2025

A Cu 4 I (3-pic) scintillator with high X-ray attenuation and PLQY was synthesized. The in situ fabricated screen achieved light yield, low detection limit, spatial resolution, enabling efficient non-destructive testing.

Language: Английский

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Mechanical Stress-Induced Defects in Thick a-PbO Layers

Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 1904 - 1904

Published: April 23, 2025

Amorphous lead oxide (a-PbO) X-ray photoconductors show potential for applications in direct conversion medical imaging detectors within the diagnostic energy range. a-PbO enables large-area deposition at low temperatures and exhibits no signal lag. Low dark current can be maintained through specialized blocking layers, similar to those used multilayer amorphous selenium (a-Se) structures commercial detectors. However, state of technology faces challenges thick layer deposition, leading crystalline inclusions cracks. Our proposed stress-induced crystallization model reveals that intrinsic stress layers amplifies with thickness, crystallographic defects. These defects, which are associated stable phase β-PbO, contribute increased initiate cracking. We calculate thermal expansion coefficient a-PbO, indicating a thermomechanical mismatch between photoconductor substrate as primary source stress. Furthermore, we demonstrate parameters significantly impact heat accumulation growing layer, thereby facilitating temperature-induced crystallization. study suggests relieving grown by eliminating mismatches different structures, coupled optimizing prevent during growth, may inhibit or even emergence structural defects layers.

Language: Английский

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Effects of Intrinsic Defects on the Carrier Lifetime in CdZnTe: Insights from Ab Initio Calculations

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1191 - 1198

Published: Jan. 23, 2025

CdZnTe (CZT) has garnered substantial attention due to its outstanding performance in room-temperature semiconductor radiation detectors, where carrier transport properties are critical for assessing the detector performance. However, complexities of crystal growth, CZT is prone defects that affect lifetime and mobility. To investigate how nonequilibrium transport, nonadiabatic molecular dynamics (NAMD) employed examine six types intrinsic their impact on electron-hole (e-h) recombination. The findings reveal Te substitution at Cd site (TeCd) interstitial (Tei) expedite recombination by introducing intermediate energy levels. coupling new levels vacancy (VTe) with conduction band minimum (CBM) slows down electron release results an extended time. (CdTe) (Cdi) enhance (NAC) accelerate In contrast, (VCd) diminishes NAC through weakening high-frequency phonons leads a deceleration rate. Overall, may change structures vary NAC, which It believed this research benefit understanding carriers' provide hints further optimizing material nuclear detection.

Language: Английский

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