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Highly Transparent Lead Halides Bmpip2PbBr4 Single Crystals for X-Ray Imaging and Versatile Ionizing Radiation Detection 用于x射线成像和多功能电离辐射探测的高透明卤化铅Bmpip2PbBr4单晶
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202505662
Haitao Tang, Wusheng Zou, Yong Liu, Hailin Liu, Fangqi Liu, Zhiyuan Chen, Junqi Dong, Gaokui He, Zhu Wang, Qianqian Lin
Metal halides have emerged as promising candidates for high-performance optoelectronic devices and radiation detectors. However, developing a single scintillator material sensitive to multiple types of ionizing radiation, such as X-rays, γ-rays and neutrons, remains challenging due to their vastly different absorption cross-sections. In this work, we report a 0D organic metal halide hybrid single crystal, Bmpip2PbBr4, which incorporates light organic cations and heavy inorganic frameworks at the molecular scale to enable multifarious ionizing radiation detection. This novel single crystal demonstrates remarkable optical transparency (98.90%) and outstanding luminescent performance (PLQY = 48.14, life time = 63.50). Under exposure to X-ray radiation and γ-rays from 22Na, the light yields reach 21,000± 800 (X-ray) and 16000 photons MeV−1 (22Na γ-ray), respectively. Moreover, the material demonstrates effective detection capabilities for α-particles, β-particles, γ-rays and neutrons. These results highlight the potential of Bmpip2PbBr4 single crystals as a versatile scintillator for detecting X-ray imaging and ionizing radiation detection.
金属卤化物已成为高性能光电器件和辐射探测器的有前途的候选者。然而,开发一种对多种电离辐射敏感的闪烁体材料,如x射线、γ射线和中子,由于它们的吸收截面差异很大,仍然具有挑战性。在这项工作中,我们报道了一种0D有机金属卤化物杂化单晶Bmpip2PbBr4,它在分子尺度上结合了轻有机阳离子和重无机框架,可以实现多种电离辐射检测。该单晶具有优异的光学透明度(98.90%)和发光性能(PLQY = 48.14,寿命= 63.50)。在22Na的x射线和γ射线照射下,产光量分别达到21,000±800 (x射线)和16000光子MeV−1 (22Na γ射线)。此外,该材料还具有对α-粒子、β-粒子、γ射线和中子的有效探测能力。这些结果突出了Bmpip2PbBr4单晶作为一种多功能闪烁体用于检测x射线成像和电离辐射检测的潜力。
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引用次数: 0
Acid Resistant and Highly Silver Selective Membranes Based on Charged Nanoporous 2D-Materials. 基于带电纳米多孔二维材料的耐酸和高银选择性膜。
IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202512412
Sarah M Chevrier, Thibault Rosier, Bo Han, Lina Cherni, Fabien L Olivier, Hélène Isnard, Jean-Christophe P Gabriel

The amount of waste electrical and electronic equipment (WEEE) is growing rapidly, yet less than a quarter of it is recycled. These "urban mines" contain valuable and critical metals that must be recovered. Therefore, developing more sustainable and energy-efficient separation techniques is essential. Membrane technology has demonstrated this capability, particularly those based on 2D materials, due to their atomic thickness and the ability to precisely tune pore size. This report introduces a novel nanofiltration membrane fabricated from charged, fully exfoliated, nanoporous 2D nanosheets. Developed for ion separation, it exhibits exceptional selectivity for silver (Ag) over other metals typically found in WEEE leachates-a feature highly relevant for solar panel recycling. Furthermore, its rare stability in acidic media makes such an approach advantageous for hydrometallurgical processes. Notably, we demonstrate that these charged 2D membranes exhibit two distinct ion transport mechanisms, intra- and inter- lamellar, to achieve remarkable and rapid separation within 2 min.

废弃电子电气设备(WEEE)的数量正在迅速增长,但其中只有不到四分之一被回收利用。这些“城市矿山”含有必须回收的贵重和关键金属。因此,开发更可持续和节能的分离技术至关重要。膜技术已经证明了这种能力,特别是基于二维材料的膜技术,因为它们的原子厚度和精确调节孔径的能力。本报告介绍了一种新型纳滤膜,由带电的、完全脱落的、纳米多孔的二维纳米片制成。它是为离子分离而开发的,它对银(Ag)的选择性优于WEEE渗滤液中常见的其他金属,这是与太阳能电池板回收高度相关的一个特征。此外,它在酸性介质中罕见的稳定性使这种方法有利于湿法冶金过程。值得注意的是,我们证明了这些带电的二维膜表现出两种不同的离子传输机制,片层内和片层间,在2分钟内实现显著和快速的分离。
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引用次数: 0
Exploration of Copper Halide Linear-Array Detector Prototype for Security Checks 用于安全检查的卤化铜线性阵列探测器原型的探索
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202514814
Yang Zhou, Tengyue He, Wenyi Shao, Wentao Wu, Peng Yuan, Haijiao Xie, Osman M. Bakr, Omar F. Mohammed
The structural tunability and photophysical richness of metal halides make them ideal for exploring next-generation X-ray scintillators. Although numerous candidates have been reported in recent years, their commercial viability remains to be rigorously demonstrated. Among them, the high-density all-inorganic low-dimensional copper halide Cs3Cu2I5 with a soft lattice and pronounced electron–phonon coupling, readily generates a self-trapped exciton and thus delivers efficient, self-absorption-free emission. In this work, we further modified the scintillation performance of Cs3Cu2I5 by Mn2+ incorporation. The optimized composition delivers 1.35 times the relative light output of CsI: Tl, with a detection limit down to 33.1 nGy s−1. Besides, the copper halide scintillator possesses negligible afterglow and a fast X-ray excitation decay time of 46.4 µs. More importantly, the copper halide scintillator exhibits exceptional light output, which is ∼18% higher than that of a commercial imaging scintillator (Carestream Min-R 2190), through detector-level determination. We demonstrate a previously unexplored implementation of a powder-based copper halide scintillator in a linear-array detector, achieving a spatial resolution of 1.1 lp/mm and showing strong potential for enhanced security inspection applications.
金属卤化物的结构可调性和光物理丰富性使其成为探索下一代x射线闪烁体的理想选择。尽管近年来已经报道了许多候选材料,但它们的商业可行性仍有待严格证明。其中,高密度的全无机低维卤化铜Cs3Cu2I5具有软晶格和明显的电子-声子耦合,容易产生自困激子,从而提供高效,无自吸收的发射。在这项工作中,我们通过加入Mn2+进一步改善了Cs3Cu2I5的闪烁性能。优化后的组合物的相对光输出是CsI: Tl的1.35倍,检测限降至33.1 nGy s−1。此外,卤化铜闪烁体的余辉可以忽略不计,x射线激发衰减时间为46.4µs。更重要的是,通过探测器水平的测定,卤化铜闪烁体表现出优异的光输出,比商业成像闪烁体(Carestream Min-R 2190)高出约18%。我们展示了一种以前未开发的基于粉末的卤化铜闪烁体在线性阵列探测器中的实现,实现了1.1 lp/mm的空间分辨率,并显示出增强安全检查应用的强大潜力。
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引用次数: 0
Supramolecular Assemblies of Self-Immolative Janus Dendrimers With Rapid Photodegradation Response. 具有快速光降解反应的自焚双面树状大分子的超分子组装体。
IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202511067
Chuanfeng Li, Jiabin Luan, Daniela A Wilson, Elizabeth R Gillies

Advanced supramolecular assemblies with predefined lifetimes and rapid responses to stimuli are in high demand for applications such as biomedical delivery systems. However, such assemblies are rarely able to respond rapidly and completely to stimuli, with predictable changes in morphology. Here, we introduce monodisperse self-immolative Janus dendrimers (SIJDs) composed of hydrophilic oligo(ethylene glycol)-functionalized phenolic acid dendrons and hydrophobic monodisperse oligo(ethyl glyoxylate) chains having light-responsive end-groups. These SIJDs self-assemble into spherical nanoparticles in aqueous media. Upon ultraviolet (UV) light irradiation, the hydrophobic oligo(ethyl glyoxylate) units exhibit rapid end-to-end self-immolation within minutes. The depolymerization at the molecular level leads to a degradation pathway from spherical to crescent-shaped nanoparticles, which can be used for the rapid release of encapsulated molecules of interest.

具有预定寿命和对刺激的快速反应的先进超分子组件在生物医学输送系统等应用中具有很高的需求。然而,这种组合很少能够对刺激做出快速和完全的反应,并具有可预测的形态变化。在这里,我们引入了由亲水性低聚(乙二醇)功能化的酚酸树梢和具有光响应端基的疏水性单分散低聚(乙基乙醛酸)链组成的单分散自牺牲Janus树状大分子(SIJDs)。这些SIJDs在水介质中自组装成球形纳米颗粒。在紫外线(UV)光照射下,疏水寡聚(乙基乙氧基)单元在几分钟内表现出快速的端到端自焚。在分子水平上的解聚导致了从球形到新月形纳米颗粒的降解途径,这可以用于快速释放被封装的感兴趣的分子。
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引用次数: 0
Topography-Free Dual-Lubricant Patterned Slippery Surfaces for Programmable Droplet Control and High-Performance Water Harvesting. 用于可编程液滴控制和高性能集水的无地形双润滑剂图案滑面。
IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202510374
Jinchul Yang, Eonji Kim, Doo Young Choi, Jineun Lee, Hwanhui Yun, Jinhee Lee, Kyuyoung Heo, In Hwan Jung, Yong-Jae Jin, Joon Heon Kim, Giseop Kwak, Wang-Eun Lee

Passive droplet control is critical for next-generation water harvesting, fluidic logic, and adaptive wetting surfaces. Here, we report a scalable, topography-free slippery liquid-infused porous surface (SLIPS) based on poly[1-phenyl-2-[p-(trimethylsilyl)phenyl]acetylene] (PTMSDPA). By selectively chemically fluorinating specific regions of the porous PTMSDPA film, followed by sequential infusion of two immiscible hydrophobic lubricants into their respective affinity-matched polymer matrices, this approach enables interfacial energy contrasts that direct droplet motion. The heterogeneous oil-infused porous surface (HOIPS) has a unique intrinsic fluorescence enabling real-time, dye-free visualization of infiltrated lubricant domains. Owing to its ultrathin (∼200 nm) and flexible polymer structure, the HOIPS enables controllable droplet motion on flat, flexible, and curved substrates without reliance on surface topography, physical confinement, or asymmetric geometries. Sub-millimeter-scale HOIPS line patterns enable controlled droplet coalescence, shedding diameter, and release timing during condensation, and optimized patterns exhibit up to 2.5× higher water-harvesting performance compared to fluorinated-oil-based SLIPS, providing a material-efficient strategy for liquid-repellent surfaces. Taken together, these results establish PTMSDPA-based HOIPS as a versatile platform for controlled droplet manipulation and condensation management.

被动液滴控制对于下一代集水、流体逻辑和自适应润湿表面至关重要。在这里,我们报道了一种基于聚[1-苯基-2-[对-(三甲基硅基)苯基]乙炔(PTMSDPA)的可伸缩、无地形的光滑液体注入多孔表面(SLIPS)。通过选择性地对多孔PTMSDPA膜的特定区域进行化学氟化,然后将两种不混溶的疏水润滑剂依次注入各自的亲和匹配的聚合物基质中,这种方法可以实现直接液滴运动的界面能对比。非均相油注入多孔表面(HOIPS)具有独特的固有荧光,可以实时、无染料地显示渗透的润滑剂区域。由于其超薄(~ 200nm)和柔性聚合物结构,HOIPS能够在平坦、柔性和弯曲的基板上实现可控的液滴运动,而不依赖于表面形貌、物理限制或不对称几何形状。亚毫米级的HOIPS线模式可以控制液滴在凝结过程中的聚结、脱落直径和释放时间,与氟化油基slip相比,优化后的模式具有高达2.5倍的集水性能,为拒液表面提供了一种材料效率高的策略。综上所述,这些结果建立了基于ptmsdpa的HOIPS作为控制液滴操作和冷凝管理的通用平台。
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引用次数: 0
Green Fabrication of Synergistic Adsorption-Photocatalysis Nanofiber Composite Membranes for Enhanced Dye Removal. 协同吸附-光催化纳米纤维复合膜的绿色制备及其对染料的去除效果。
IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202512409
Chang Yun, Chun Li, Pengxin Zhao, Zhaohuan Zhang, Xue Mao, Qingling Zhang, Xiaoxiao Wei, Zhenfang Zhang, Fenglei Zhou, Hong Wu, Chengkun Liu

The widespread discharge of dye-laden wastewater poses serious environmental and health threats due to its high toxicity and poor biodegradability. Conventional treatment methods are often energy-intensive and prone to secondary pollution, highlighting the need for efficient and sustainable purification materials. Herein, a green and scalable three-step strategy is developed to fabricate multifunctional ethanol-soluble polyamide/activated carbon/polydopamine/layered double hydroxide (EPA/AC/PDA/LDHs) nanofiber membranes. The process-combining blend electrospinning, biomimetic in situ polymerization, and room-temperature LDH growth-completely avoids toxic solvents and high-temperature calcination. The hierarchical porous structure, formed through the synergistic integration of AC, PDA, and LDHs, provides abundant active sites, strong interfacial adhesion, and enhanced charge transfer capability. The optimized membrane achieves removal efficiencies of 96.3% for methylene blue and 93.2% for Congo red, maintaining over 70% performance after five reuse cycles. Mechanistic studies reveal a synergistic adsorption-photocatalysis mechanism, where pollutants are captured via electrostatic attraction and π-π stacking, then degraded by reactive radicals generated under visible light through PDA-enhanced charge separation. This work offers a solvent-safe, energy-efficient, and recyclable pathway for advanced wastewater treatment and establishes a generalizable paradigm for green fabrication of environmental remediation materials.

含染料废水毒性大、可降解性差,对环境和健康构成严重威胁。传统的处理方法往往是能源密集型的,容易产生二次污染,突出需要高效和可持续的净化材料。本文提出了一种绿色可扩展的三步法制备多功能乙醇溶聚酰胺/活性炭/聚多巴胺/层状双氢氧化物(EPA/AC/PDA/LDHs)纳米纤维膜。该工艺结合了共混静电纺丝、仿生原位聚合和室温LDH生长,完全避免了有毒溶剂和高温煅烧。通过AC、PDA和LDHs协同整合形成的层次化多孔结构提供了丰富的活性位点,强大的界面附着力和增强的电荷转移能力。优化后的膜对亚甲基蓝的去除率为96.3%,对刚果红的去除率为93.2%,经过5次重复使用后,其去除率仍保持在70%以上。机理研究揭示了一种协同吸附-光催化机制,其中污染物通过静电吸引和π-π堆积被捕获,然后通过pda增强的电荷分离在可见光下产生的活性自由基降解。这项工作为先进的废水处理提供了一种溶剂安全、节能和可回收的途径,并为绿色制造环境修复材料建立了一个可推广的范例。
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引用次数: 0
High Temperature Ni-Diffusion Plaguing Ionic Conductivity of Solid Oxide Cell. 高温ni扩散影响固体氧化物电池离子电导率。
IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202509623
Jiakun Sun, Hengbo Yin, Yan Li, Lihan Zhang, Yucun Zhou, Jun Zhang, Liangfei Xu, Jianqiu Li, Dongsheng Ren, Languang Lu, Minggao Ouyang, Xinfang Zhang, Manling Sui, Pengfei Yan

At the operating temperature (∼750°C) of solid oxide cells (SOCs), Ni diffusion has been revealed to cause aging degradations on catalytic performance, electronic conductivity, and mechanical failures. This work discloses that Ni diffusion during the high-temperature (∼1400°C) SOC fabrication process can severely decrease the oxide ion conductivity due to Ni segregation (up to ∼7 at.%) at the YSZ (yttria-stabilized zirconia) grain boundaries (GBs). Combining electrochemical tests and advanced electron microscopy, we reveal that higher Ni enrichment leads to thicker space charge layer and higher space charge potential, which generates a significant GB blocking effect for oxide ion diffusion. We have quantitatively estimated the ionic conductivity drop induced by Ni segregation at the operation temperature range. Utilizing the ultrafast high-temperature sintering technique, we successfully mitigate Ni segregation at GBs, which can double the ionic conductivity at 700°C. This work not only clarifies that Ni segregation at YSZ GBs can significantly plague the ionic conductivity but also demonstrates that mitigating Ni segregation at YSZ GBs is a new avenue to reduce the cell's ohmic resistance and boost the SOC performance.

在固体氧化物电池(soc)的工作温度(~ 750°C)下,Ni扩散导致催化性能、电子导电性和机械故障的老化退化。这项工作揭示了高温(~ 1400°C) SOC制造过程中Ni的扩散会严重降低氧化离子的电导率,因为Ni偏析(高达~ 7 at)。%)在YSZ(钇稳定氧化锆)晶界处(GBs)。结合电化学测试和先进的电镜技术,我们发现,Ni富集程度越高,空间电荷层越厚,空间电荷电位越高,对氧化离子扩散产生明显的GB阻断效应。我们定量地估计了在工作温度范围内由Ni偏析引起的离子电导率下降。利用超快高温烧结技术,我们成功地缓解了GBs中的Ni偏析,这可以使700°C时的离子电导率提高一倍。这项工作不仅阐明了镍在YSZ gb中的偏析会严重影响离子电导率,而且还表明减轻镍在YSZ gb中的偏析是降低电池欧姆电阻和提高SOC性能的新途径。
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引用次数: 0
Versatile Chitosan-Based Hydrogel Dressings for Multi-Scenario Wound Management. 多功能壳聚糖基水凝胶敷料用于多场景伤口管理。
IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202514813
Ling Jiang, Xuemei Wang, Hui Jiang

Despite the great self-regeneration ability of skin, severe defects require the intervention of functional dressings for effective healing. Hydrogels are ideal candidates for wound administration because of their high hydration, structural porosity, and extracellular matrix mimicking properties. Chitosan (CS) is the core matrix for building hydrogels because of its inherent biocompatibility, oxygen permeability, hemostatic, and antimicrobial activities. Through reversible cross-linking strategies with dynamic covalent bonds (e.g., Schiff base and borate-diol) and physical interactions (hydrogen bonding, electrostatic interactions, and host-guest interactions, etc.), CS-based hydrogels can dynamically adapt to the complex microenvironment of wounds. In recent years, researchers have developed smart CS hydrogel dressings with biocompatible and biodegradable, hemostatic/adhesive, antimicrobial, antioxidant, anti-inflammatory, stimulus-responsive (pH/temperature/glucose), controlled-release, and self-healing functionalities in response to diverse needs during wound healing. In acute wounds, its rapid hemostatic and infection control properties significantly accelerate healing, while for chronic wounds (e.g., drug-resistant bacteria-infected wounds, deep burns, and diabetic ulcers), it breaks down healing barriers through synergistic mechanisms including photothermal, antimicrobial, macrophage polarization modulation, reactive oxygen species scavenging, and vascular regeneration promotion. This article contains a comprehensive review of the design principles, functional optimization, and the recent progress of CS-based hydrogels for wound healing, as well as a further outlook on the future direction of hydrogel dressings in wound treatment.

尽管皮肤具有很强的自我再生能力,但严重的缺陷需要功能性敷料的干预才能有效愈合。水凝胶由于其高水合性、结构孔隙度和细胞外基质模拟特性,是伤口管理的理想候选者。壳聚糖(CS)因其固有的生物相容性、透氧性、止血和抗菌活性而成为构建水凝胶的核心基质。通过具有动态共价键(如希夫碱和硼酸二醇)和物理相互作用(氢键、静电相互作用、主客相互作用等)的可逆交联策略,cs基水凝胶可以动态适应伤口复杂的微环境。近年来,研究人员开发了具有生物相容性和可生物降解、止血/粘附、抗菌、抗氧化、抗炎、刺激反应(pH/温度/葡萄糖)、控释和自愈功能的智能CS水凝胶敷料,以响应伤口愈合过程中的各种需求。在急性伤口中,其快速止血和控制感染的特性显著加速愈合,而对于慢性伤口(如耐药细菌感染的伤口、深度烧伤和糖尿病溃疡),它通过光热、抗菌、巨噬细胞极化调节、活性氧清除和促进血管再生等协同机制打破愈合障碍。本文综述了基于cs的伤口愈合水凝胶的设计原理、功能优化和最新进展,并进一步展望了水凝胶敷料在伤口治疗中的未来发展方向。
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引用次数: 0
High Thermoelectric Performance in High-Entropy AgMnGePbSbTe5 With Pb Vacancies 具有Pb空位的高熵AgMnGePbSbTe5的高热电性能
IF 13.3 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202513965
Guanzheng Luo, Yubo Luo, Yingchao Wei, Bo Wang, Wenjie Shu, Yao Dai, Linyao Wu, Shuhui Zhang, Xin Li, Zheng Ma, Yan Liu, Yao Luo, Qingyu Yan, Junyou Yang
Thermoelectric materials enable the conversion of heat into electricity with no waste heat. Nanotwined AgMnGePbSbTe5, a novel P-type narrow bandgap high-entropy semiconductor, exhibits enhanced thermoelectric performance upon the introduction of Pb vacancies. With increasing Pb vacancy content, the hole concentration rose monotonically, dramatically augmenting the electrical conductivity, thus enhancing the power factor. The DFT calculation indicates that electron band convergence herein improves the density of states effective mass, hence stabilizing the Seebeck coefficient. On the other hand, as the vacancies promote the point defect scattering, the lattice thermal conductivity is suppressed as well. Consequently, the synergistic effects on both electrical and thermal transport led to a peak ZT of 2.23 at 723 K and an average ZT of 1.31 across the temperature range of 303–813 K for AgMnGePb0.97SbTe5, representing improvements of 31% and 34% over the initial sample, respectively. This material creates a competitive thermoelectric performance among the Te-based thermoelectric materials, establishing a promising optimization strategy utilizing vacancy engineering.
热电材料使热转化为电而不产生余热。纳米缠绕AgMnGePbSbTe5是一种新型的p型窄带隙高熵半导体,在引入Pb空位后表现出增强的热电性能。随着Pb空位含量的增加,空穴浓度单调上升,电导率显著提高,从而提高了功率因数。DFT计算表明,电子带收敛提高了态有效质量的密度,从而稳定了塞贝克系数。另一方面,由于空位促进了点缺陷散射,晶格热导率也受到抑制。因此,电输运和热输运的协同效应导致AgMnGePb0.97SbTe5在723 K时的ZT峰值为2.23,在304 - 813 K温度范围内的平均ZT为1.31,分别比初始样品提高了31%和34%。该材料在碲基热电材料中创造了具有竞争力的热电性能,建立了利用空位工程的有前途的优化策略。
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引用次数: 0
Isotropic ZnSe Shell Growth for Uniform-Shaped Green InP Quantum Dots With Tunable Size and Absorption. 具有可调谐尺寸和吸收的均匀形状绿色InP量子点的各向同性ZnSe壳生长。
IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-02-05 DOI: 10.1002/smll.202511951
Donghyeok Shin, Yuri Kim, Beomgyu Kim, Sunghyun Park, Yang-Hee Kim, Heesun Yang

Indium phosphide (InP) quantum dots (QDs) are among the most promising heavy-metal-free emitters for next-generation displays, yet achieving isotropic growth of thick ZnSe shells remains challenging because of strain accumulation and facet-dependent surface energies. Here, we report a halide-mediated, stepwise ZnSe growth strategy that produces uniform, near-spherical green-emitting InP/ZnSe/ZnS QDs with precisely tunable shell thicknesses (1.75-5.5 nm) and final sizes up to 14 nm. The resulting QDs preserve near-unity photoluminescence quantum yields (PL QYs) up to a critical ZnSe thickness of ∼3.5 nm, beyond which accumulated compressive strain at the InP/ZnSe interface generates interfacial defects and reduces PL QY. Notably, ZnSe shell contributes significantly to optical absorption, with the molar absorption coefficient at 450 nm scaling nearly with shell volume and following a clear empirical relation. A series of differently sized QDs is further assessed as blue-to-green color converters, revealing a size-dependent balance between enhanced absorption and efficient light conversion.

磷化铟(InP)量子点(QDs)是下一代显示器中最有前途的无重金属发射体之一,但由于应变积累和面依赖表面能,实现厚ZnSe壳的各向同性生长仍然具有挑战性。在这里,我们报告了卤化物介导的逐步ZnSe生长策略,该策略可以产生均匀的,近球形的绿色发光InP/ZnSe/ZnS量子点,具有精确可调的壳厚度(1.75-5.5 nm),最终尺寸可达14 nm。所得到的量子点保持接近统一的光致发光量子产率(plqys),达到临界ZnSe厚度~ 3.5 nm,超过该厚度,InP/ZnSe界面处累积的压缩应变会产生界面缺陷并降低plqy。值得注意的是,ZnSe壳层对光吸收有显著的贡献,在450 nm尺度下的摩尔吸收系数与壳层体积接近,并遵循明显的经验关系。一系列不同尺寸的量子点被进一步评估为蓝色到绿色的颜色转换器,揭示了增强吸收和有效光转换之间的尺寸依赖平衡。
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