Optical Materials最新文献_第4页

Influence of Tb3+ co-doping on luminescence and scintillation performance of Y1.70Gd1.25Al2.8Ga2.15O12:Ce,Tb garnet films Tb3+共掺杂对Y1.70Gd1.25Al2.8Ga2.15O12:Ce，Tb石榴石薄膜发光和闪烁性能的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-14 DOI: 10.1016/j.optmat.2026.117968

Warut Chewpraditkul , Kriangkrai Wantong , Weerapong Chewpraditkul , Nakarin Pattanaboonmee , Romana Kucerkova , Alena Beitlerova , Dita Strachotova , Stanislav Danis , Martin Nikl , Miroslav Kucera

In this study, Y_1.70Gd_1.25Al_2.8Ga_2.15O₁₂:Ce,Tb (YGAGG:Ce,Tb) single-crystalline films (SCFs) with Tb³⁺ co-doping concentrations of 0, 1, and 5 at.% were grown on Gd₃Al₂Ga₃O₁₂ single crystal substrate using the isothermal liquid phase epitaxy method. The photoluminescence, radioluminescence, and scintillation properties were systematically studied with the aim to enhance the integral radioluminescence intensity. The bidirectional energy transfer process between Tb³⁺ and Ce³⁺ ions was confirmed by means of photoluminescence spectra and decay kinetics measurements. Under soft X-ray excitation, YGAGG:Ce,Tb1% SCF exhibited the highest relative intensity of the Ce³⁺ emission and the highest integral radioluminescence yield of ∼180 % of Tb - free YGAGG:Ce one. Conversely, the scintillation light yield, measured within a few μs time gate under excitation with high-energy ionizing radiation, does not increase upon co-doping with Tb³⁺ ions. Under excitation with 5.5 MeV α-particles from a²³⁸Pu radioactive source, the scintillation light yield of 8750 photons/MeV and good energy resolution of 5.5 % obtained for the YGAGG:Ce SCF are better than the values obtained for the YGAGG:Ce,Tb1% one (6740 photons/MeV and 14.3%). High integral radioluminescence yield of this YGAGG:Ce,Tb1% SCF along with rather high onset temperature for thermal quenching of 362 K of the Ce³⁺-related emission makes it a promising scintillator for utilization in medical X-ray imaging devices. Due to the particularly high thermal stability of Tb³⁺-related emission up to ∼700 K the Tb-doped garnets are suitable for high-temperature applications.

本研究制备了Y1.70Gd1.25Al2.8Ga2.15O12:Ce,Tb （YGAGG:Ce,Tb）单晶薄膜（SCFs）， Tb3+共掺杂浓度分别为0、1和5 at。采用等温液相外延法在Gd3Al2Ga3O12单晶衬底上生长。系统地研究了该材料的光致发光、辐射发光和闪烁特性，以提高其整体辐射发光强度。通过光致发光光谱和衰变动力学测量，证实了Tb3+和Ce3+离子之间的双向能量传递过程。在软x射线激发下，YGAGG:Ce，Tb1% SCF表现出最高的Ce3+发射相对强度和最高的积分辐射发光率- 180%的无Tb YGAGG:Ce 1。相反，在高能电离辐射激发下，在几μs时间门内测量的闪烁光产率，与Tb3+共掺杂后并没有增加。在来自a238Pu的5.5 MeV α-粒子激发下，YGAGG:Ce SCF的闪烁光产率为8750光子/MeV，能量分辨率为5.5%，优于YGAGG:Ce，Tb1%的SCF（6740光子/MeV， 14.3%）。该YGAGG:Ce，Tb1% SCF的高积分辐射发光率以及Ce3+相关发射的362 K热猝灭的较高起始温度使其成为应用于医用x射线成像设备的有前途的闪烁体。由于Tb3+相关辐射高达~ 700 K的特别高的热稳定性，掺tb石榴石适合高温应用。

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引用次数: 0

1D-iodoplumbates(II) of cyclic aliphatic diammoniums: Role of organic cation in the supramolecular organization and its influence on the anionic substructure and luminescent properties 环脂肪族二胺的d -碘铅酸盐：有机阳离子在超分子组织中的作用及其对阴离子亚结构和发光性能的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-05 DOI: 10.1016/j.optmat.2026.117943

Andrei V. Bykov , Tatiana A. Shestimerova , Mikhail A. Bykov , Sergey G. Dorofeev , Victoria E. Gontcharenko , Konstantin A. Lyssenko , Mikhail T. Metlin , Ilya V. Taydakov , Anastasia V. Grigorieva , Andrei V. Shevelkov

Low-dimensional metal halides emerge as materials for optoelectronics beyond perovskite photovoltaic applications. In a search for physical grounds of optical halometallate properties differences, we have investigated two homologous dications of cyclic aliphatic amines that are homopiperazine (Hpipe, C₅H₁₂N₂, 1,4-diazocycloheptan) and piperazine (Pipe, C₄H₁₀N₂, 1,4-diazocyclohexan) as structure-directing agents. Mixing of solutions of respective cations and PbI₂ in concentrated hydroiodic acid results in obtaining new compound (HpipeH₂){PbI₅}(I)·H₂O (1) and (PipeH₂){PbI₅}(I)·H₂O (2), the latter being described in the literature. 1 and 2 demonstrate analogous yet non-isomorphous crystal structures, they share an identical anionic substructure, composed by a zigzag chain-like cis-{PbI₅}^3– 1D-anion and an isolated I⁻ ion, as well as the same packing of all structural fragments. This rare situation among low-dimensional hybrid metal halide structures provides a unique platform for disentangling the effects of closely related cations on the supramolecular organization, more importantly, on the geometry of the halometallate anion without packing nuances, and, consequently, on optical properties, especially luminescence. A minor distinction in the cation's size and topology leads to dissimilar hydrogen bond systems and, most critically, distortion degrees of the iodoplumbate anion. Both compounds exhibit dual-band photoluminescence consisting of violet free exciton (FE) and yellow/orange (1/2) self-trapped exciton (STE) emission. The greater distortion of halometallate anion in 1 results in a larger Huang–Rhys factor, which governs the characteristics of the STE band and influences the thermal quenching efficiency. Vibrational spectra and thermal stability are also analyzed and correlated with structural features in this paper.

低维金属卤化物在钙钛矿光伏应用之外成为光电子材料。为了寻找光学卤金属酸盐性质差异的物理原因，我们研究了环脂肪族胺的两种同源指示物，即同哌嗪（Hpipe, C5H12N2, 1,4-重氮环庚烷）和哌嗪（Pipe, C4H10N2, 1,4-重氮环己烷）作为结构导向剂。将各自阳离子与PbI2溶液在浓氢碘酸中混合得到新的化合物（HpipeH2）{PbI5}(I)·H2O(1)和（PipeH2）{PbI5}(I)·H2O(2)，后者在文献中有描述。1和2表现出类似但非同构的晶体结构，它们具有相同的阴离子亚结构，由一个锯齿状链状顺式-{PbI5}3 - 1d阴离子和一个孤立的I -离子组成，以及所有结构片段的相同排列。在低维杂化金属卤化物结构中，这种罕见的情况提供了一个独特的平台，可以解开密切相关的阳离子对超分子组织的影响，更重要的是，在没有包装细微差别的情况下，对卤金属酸阴离子的几何结构的影响，从而对光学性质，特别是发光的影响。阳离子的大小和拓扑结构的微小差异导致了不同的氢键系统，最关键的是，碘铅阴离子的扭曲程度。两种化合物均表现出由紫色自由激子（FE）和黄色/橙色（1/2）自捕获激子（STE）发射组成的双波段光致发光。1中卤金属酸盐阴离子畸变越大，导致Huang-Rhys因子越大，影响STE能带的特性，影响热猝灭效率。本文还分析了振动谱和热稳定性，并将其与结构特征相关联。

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引用次数: 0

Impact of dispersion of carbon quantum dots of low concentrations into nematic liquid crystal mixture E7 on the optical properties and zeta potential of composite systems 低浓度碳量子点在向列液晶混合物E7中的分散对复合体系光学性能和zeta电位的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-07 DOI: 10.1016/j.optmat.2026.117934

Dhananjay Kumar Gaur , Kaushlendra Agrahari , Md Bayazeed Alam , Avanish Singh Parmar , Shri Singh

In recent years, carbon quantum dots (CQDs), a novel member of the carbon-based nanomaterial family, have exhibited exceptional physical and chemical properties. Dispersing quantum dots (QDs) into mesophase materials has emerged as an effective approach to modifying the physical properties of host liquid crystals. In this work, CQDs at concentrations of 0.25, 0.50, and 1.0 wt% were dispersed into the nematic liquid crystal mixture E7, and the effects of this dispersion on the optical properties and zeta potential of both pure and composite systems were investigated. The incorporation of CQDs significantly influenced the UV–visible absorbance and photoluminescence characteristics of the host medium. Fluorescence decay analysis revealed changes in the fluorescence lifetime upon CQD dispersion, indicating energy transfer from E7 to the CQDs. Zeta potential measurements showed increased values for 0.25 and 0.50 wt% CQD concentrations, while a decrease was observed at 1.0 wt%, compared to pure E7. These findings suggest that zeta potential analysis provides valuable insights into the stability and aggregation behavior of CQDs in the nematic host matrix.

近年来，碳量子点（CQDs）作为碳基纳米材料家族的新成员，表现出了优异的物理和化学性能。将量子点分散到中间相材料中已成为一种改变宿主液晶物理性质的有效方法。本文将浓度分别为0.25、0.50和1.0 wt%的CQDs分散到向列相液晶混合物E7中，研究了这种分散对纯体系和复合体系光学性质和zeta电位的影响。CQDs的掺入显著影响了宿主介质的紫外可见吸光度和光致发光特性。荧光衰减分析揭示了CQD色散后荧光寿命的变化，表明能量从E7向CQD转移。Zeta电位测量结果显示，与纯E7相比，CQD浓度在0.25和0.50 wt%时升高，而在1.0 wt%时下降。这些发现表明zeta电位分析为CQDs在向列宿主矩阵中的稳定性和聚集行为提供了有价值的见解。

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引用次数: 0

Unraveling power-dependent ablation morphologies, phase transition dynamics, and oxidation mechanisms in femtosecond laser ablation of molybdenum: Experiment and multi-scale modeling 飞秒激光烧蚀钼的功率依赖性烧蚀形貌、相变动力学和氧化机制：实验和多尺度建模

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-05 DOI: 10.1016/j.optmat.2026.117936

Chang Liu, Qing Zhang, Junjie Liu

Femtosecond laser processing of molybdenum (Mo) has emerged as a key technology in manufacturing and micromachining due to its high precision and minimal thermal damage. This study employs a combined experimental and simulation modeling approach to systematically investigate the power-induced ablation morphology and phase-change oxidation process of molybdenum under femtosecond laser irradiation. The proposed model adopts layered coupling of the two-temperature coupled molecular dynamics (TTM-MD) model and the reaction force field (ReaxFF) model, thereby achieving effective simulation of the ultra-fast energy deposition process and the evolution of dynamic chemical bonds. The results show that ablation edges form layered corrugated structures at low power levels. These structures transform into boiling-induced honeycomb structures at medium power levels, whereas micrometer-scale periodic structures are formed at high power levels. Energy dispersive spectroscopy (EDS) data reveal that oxygen content within the ablation zone is lower than at the ablation edges. Oxidation weakens initially due to the laser cleaning effect but significantly intensifies at high power, attributed to a mechanism dominated by secondary oxidation. The TTM-MD reveals a lattice structure change different from that of face-centered cubic (fcc) metal, where the lattice structure of molybdenum foil is changed from body-centered cubic (bcc) lattice to hexagonal close-packed (hcp) and a disordered structure. The oxidation model indicates that fragment sputtering occurring during the ablation process consists of oxide clusters. This study provides important guidance for the high-quality femtosecond laser micro-nano fabrication of molybdenum.

飞秒激光加工钼具有精度高、热损伤小等优点，已成为制造业和微加工领域的一项关键技术。本研究采用实验与仿真建模相结合的方法，系统研究了飞秒激光辐照下钼的功率诱导烧蚀形貌和相变氧化过程。该模型采用双温耦合分子动力学（TTM-MD）模型和反作用力场（ReaxFF）模型的分层耦合，从而实现了超快速能量沉积过程和动态化学键演化的有效模拟。结果表明：在低功率下，烧蚀边缘形成层状波纹结构；这些结构在中等功率下转变为沸腾引起的蜂窝结构，而在高功率下形成微米尺度的周期性结构。能谱分析（EDS）数据表明，烧蚀区内的氧含量低于烧蚀边缘。氧化最初由于激光清洗效果而减弱，但在高功率下明显增强，这是由于二次氧化主导的机制。TTM-MD显示出与面心立方（fcc）金属不同的晶格结构变化，钼箔的晶格结构由体心立方（bcc）晶格转变为六方密排（hcp）晶格和无序结构。氧化模型表明，在烧蚀过程中发生的碎片溅射由氧化团簇组成。该研究为高质量的飞秒激光微纳钼加工提供了重要的指导。

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引用次数: 0

Ce3+ doped Al2O3-YAG binary and Al2O3-YAG-ZrO2 ternary eutectic ceramics solidified by micro-pulling down technique: Numerical analysis, Microstructure and optical characterization Ce3+掺杂Al2O3-YAG二元和Al2O3-YAG- zro2三元共晶陶瓷微拉拔固化：数值分析、微观结构和光学表征

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-03 DOI: 10.1016/j.optmat.2026.117941

Peng Chen , Faiza Mokhtari , Yannick Guyot , Abdeldjelil Nehari , Anne Pillonnet , Xiaodong Xu , Kheirreddine Lebbou

Ce:Al₂O₃–YAG binary and Ce:Al₂O₃–YAG–ZrO₂ ternary eutectic ceramics were synthesized by the micro-pulling-down (μ-PD) method to evaluate the influence of ZrO₂ addition on their microstructure, residual stress, and luminescent characteristics. Increasing Ce³⁺ concentration resulted in progressively deeper surface coloration, consistent with its chromophoric behavior. The microstructural analysis of SEM revealed a typical “Chinese script” morphology in the binary eutectic, whereas the ternary system exhibited a colony-like architecture. X-ray diffraction confirmed the formation of binary and ternary eutectic structures without secondary phases over the investigated Ce³⁺ concentration range. The binary system exhibited lower residual stress compared with the ternary counterpart under identical processing conditions. Photoluminescence spectra demonstrated efficient visible emission in both systems, although concentration quenching was evident at higher Ce³⁺ levels. A finite element simulation incorporating induction heating, convection, and radiation was conducted to model thermal transport and melt flow during μ-PD growth. The results indicated that the highest crucible temperature was located near the coil center, and that melt flow was primarily governed by Marangoni convection—more pronounced in the ternary system due to its reduced viscosity and enhanced thermocapillary forces.

采用微拉下（μ-PD）法制备了Ce: Al2O3-YAG二元和Ce: Al2O3-YAG - ZrO2三元共晶陶瓷，考察了ZrO2添加对其微观结构、残余应力和发光特性的影响。Ce3+浓度的增加导致其表面颜色逐渐加深，这与其显色行为一致。扫描电镜显微结构分析表明，二元共晶具有典型的“汉字”形态，而三元共晶则呈现群聚结构。x射线衍射证实，在所研究的Ce3+浓度范围内形成了二元和三元共晶结构，无二次相。在相同的加工条件下，二元体系比三元体系表现出更低的残余应力。两种体系的光致发光光谱显示出有效的可见光发射，尽管在较高的Ce3+水平下存在明显的浓度猝灭。采用感应加热、对流和辐射的有限元方法模拟μ-PD生长过程中的热传递和熔体流动。结果表明，坩埚最高温度位于线圈中心附近，熔体流动主要受Marangoni对流控制，在三元体系中由于粘度降低和热毛细力增强而更加明显。

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引用次数: 0

Identification of formation of amorphous Si phase in SiOxNy films produced by plasma enhanced chemical vapor deposition 等离子体增强化学气相沉积法制备SiOxNy薄膜中非晶Si相形成的鉴定

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-01-16 DOI: 10.1016/j.optmat.2026.117895

Mariia V. Voitovych , Andrey Sarikov , Volodymyr O. Yukhymchuk , Vasyl V. Voitovych , Mykola O. Semenenko

Peculiarities of formation of inclusions of amorphous Si (a-Si) phase in Si-rich Si oxynitride films grown by plasma-enhanced chemical vapor deposition (PECVD) are studied by combined Raman scattering and infrared (IR) absorption spectroscopy. The Raman scattering results identify presence of a-Si phase in the studied films at the relative Si content exceeding a threshold value of about 0.4. The a-Si amount correlates with the concentration of hydrogen in the films, the presence of which is detected by characteristic IR absorption bands corresponding to Si–H bending (∼660 cm⁻¹) and stretching (a composite band in the range of ∼1900–2400 cm⁻¹) vibrations. The method of deconvolution of IR absorbance spectra in the range of ∼600–1300 cm⁻¹ developed earlier is used to reliably separate the IR band at ∼660 cm⁻¹. This band is identified to origin from the amorphous Si phase within the studied Si oxynitride films. This makes it possible to propose IR spectroscopy with analysis of the low-wavenumber part of the spectra as an efficient method of identifying phase composition of Si-rich Si oxynitride films. The obtained results contribute to understanding of the regularities of formation of phase compositions of PECVD grown Si oxynitride films and are useful for controlling the films properties for practical applications.

采用拉曼散射和红外吸收光谱相结合的方法研究了等离子体增强化学气相沉积法（PECVD）生长富硅氧氮化硅薄膜中非晶态Si （a-Si）相夹杂物的形成特点。拉曼散射结果表明，在相对Si含量超过0.4的阈值时，薄膜中存在a-Si相。a- si的量与薄膜中氢的浓度相关，氢的存在通过对应于Si-H弯曲（~ 660 cm−1）和拉伸（复合波段在~ 1900-2400 cm−1范围内）振动的特征红外吸收带来检测。先前开发的红外吸收光谱在~ 600-1300 cm−1范围内的反褶积方法用于可靠地分离~ 660 cm−1的红外波段。这一波段是由氮化硅氧化膜内的非晶硅相形成的。这使得通过分析光谱的低波数部分提出红外光谱作为识别富硅硅氧化氮化硅薄膜相组成的有效方法成为可能。所得结果有助于了解PECVD生长的氧化氮化硅薄膜相组成的形成规律，并有助于在实际应用中控制薄膜的性能。

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引用次数: 0

Coupling between dual resonance modes of plasmonic nanorod arrays and emission of R6G in plasmon resonance energy transfer 等离子体共振能量转移中等离子体纳米棒阵列双共振模式与R6G发射的耦合

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-01-17 DOI: 10.1016/j.optmat.2026.117890

Sonia Ghafoor, Lefei Zhang, Hongjie Huang, Pei Wang

Plasmon resonance energy transfer (PRET) enhances energy transfer between plasmonic nanostructures and fluorophores by exploiting spectral overlap, thereby strengthening the light-matter interactions. However, conventional PRET systems rely on single-mode coupling, which limits their tunability and applicability to fluorophores with broad or multipeak emission spectra. Here, we introduce a dual-mode PRET system consisting of silver nanorod arrays coupled with Rhodamine 6G (R6G) molecules embedded in a PMMA matrix. By tuning the nanorod length, we achieved the simultaneous coupling of two longitudinal plasmonic resonance modes with the R6G emission band. Importantly, a strong emission peak results from the enhanced excitation and emission rates of R6G molecules caused by the well-spectral overlap between the plasmonic resonance modes of the silver nanorods and the R6G emission band, reducing the fluorescence lifetime to 0.43 ns. In contrast, weak spectral overlap produces a lower emission intensity and a longer fluorescence lifetime of 2.1 ns. The proposed PRET system can offer a tunable dual-mode platform with promising potential for next-generation biosensing, fluorescence modulation, and photonic-device applications.

等离子体共振能量转移（PRET）通过利用光谱重叠增强等离子体纳米结构和荧光团之间的能量转移，从而增强光-物质相互作用。然而，传统的PRET系统依赖于单模耦合，这限制了它们的可调性和对具有宽峰或多峰发射光谱的荧光团的适用性。在这里，我们介绍了一种双模PRET系统，该系统由银纳米棒阵列和嵌入PMMA矩阵的罗丹明6G （R6G）分子耦合组成。通过调整纳米棒的长度，我们实现了两个纵向等离子共振模式与R6G发射带的同时耦合。重要的是，由于银纳米棒的等离子体共振模式与R6G发射带之间的良好光谱重叠导致R6G分子的激发和发射速率增强，产生了一个强发射峰，将荧光寿命降低到0.43 ns。相比之下，弱光谱重叠产生较低的发射强度和较长的荧光寿命为2.1 ns。提出的PRET系统可以提供一个可调谐的双模平台，具有下一代生物传感、荧光调制和光子器件应用的潜力。

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引用次数: 0

Sm2+-doped CsEuI3 crystals with highly efficient near-infrared emission and X-ray radioluminescence 具有高效近红外发射和x射线辐射发光的Sm2+掺杂CsEuI3晶体

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-01-29 DOI: 10.1016/j.optmat.2026.117932

Fan Xu, Qinhua Wei, Chang Shu, HaoHan Wang, Hang Yin, Suyin Zhang, Gao Tang, Laishun Qin

Near-infrared (NIR)-emitting scintillators coupled with high-quantum-efficiency silicon-based photodetectors are an effective strategy to improve the radiation detection properties. In this study, the highly efficient broad NIR-emitting CsEuI₃ halide scintillator is developed via Sm²⁺ doping. The centimeter-scale CsEuI₃:Sm²⁺ scintillation crystals were successfully grown using the Bridgman method. The crystal structure and composition were analyzed and discussed using Inductively Coupled Plasma Mass Spectrometry (ICP-MS), X-ray Diffraction (XRD), and X-ray Photoelectron Spectroscopy (XPS), revealing that Sm²⁺ successfully replaces Eu²⁺ in the crystal lattice. Under ultraviolet (UV) and X-ray excitation, the broad 5d - 4f emission band of Sm²⁺ and Eu²⁺ are observed, peaking at 825 and 452 nm, respectively. The CsEuI₃:Sm crystal presents a high NIR photoluminescence quantum yield (PLQY) of 80.5 %. The energy transfer processes between Eu²⁺ and Sm²⁺ are investigated by using photoluminescence (PL) spectra and decay kinetics. The scintillation mechanism, luminescence thermal stability and defect are discussed based on thermoluminescence (TL) and variable-temperature X-ray luminescence (XEL). This work provides a novel NIR scintillation material with excellent performance for applications in radiation detection, NIR spectroscopy and night vision.

近红外（NIR）闪烁体与高量子效率的硅基光电探测器耦合是提高辐射探测性能的有效策略。本研究采用Sm2+掺杂的方法，研制了高效宽发射nir的CsEuI3卤化物闪烁体。采用Bridgman方法成功生长出厘米级CsEuI3:Sm2+闪烁晶体。利用电感耦合等离子体质谱（ICP-MS）、x射线衍射（XRD）和x射线光电子能谱（XPS）对晶体结构和组成进行了分析和讨论，发现Sm2+成功取代了晶格中的Eu2+。在紫外（UV）和x射线激发下，Sm2+和Eu2+的5d - 4f宽发射带分别在825和452 nm处达到峰值。CsEuI3:Sm晶体的近红外发光量子产率（PLQY）高达80.5 %。利用光致发光（PL）光谱和衰变动力学研究了Eu2+和Sm2+之间的能量传递过程。基于热释光（TL）和变温x射线发光（XEL），讨论了其闪烁机理、发光热稳定性和缺陷。该研究为辐射探测、近红外光谱和夜视等领域提供了一种性能优异的新型近红外闪烁材料。

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引用次数: 0

Effect of multilayer SnO2 architectures on charge transport and optical properties in triple-cation perovskite solar cells 多层SnO2结构对三阳离子钙钛矿太阳能电池电荷输运和光学性质的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-12 DOI: 10.1016/j.optmat.2026.117947

Nur Farah Hanun Wira , Kai Jeat Hong , Chi Chin Yap , Kok-Keong Chong , Josephine Ying Chyi Liew , Hock Beng Lee , Jae-Wook Kang , Mohammad Hafizuddin Hj Jumali , Mohd Hafiz Mohd Zaid , Sin Tee Tan

Triple-cation halide perovskites have emerged as highly promising absorbers for perovskite solar cells (PSCs) owing to their excellent intrinsic optoelectronic properties. Nevertheless, challenges such as device instability and current-voltage hysteresis, often originating from hydroxyl-rich electron transport layers (ETLs) like ZnO and TiO₂, continue to hinder device performance. In this work, SnO₂-based ETLs with different layer architectures were engineered and integrated into planar PSCs (FTO/SnO₂/perovskite/Spiro-OMeTAD/Ag) to mitigate these limitations. Three ETL configurations were investigated: a reference bilayer comprising one amorphous and one crystalline SnO₂ layer (1A1C), a single amorphous layer with a double crystalline stack (1A2C), and a double amorphous layer with a single crystalline layer (2A1C). Comprehensive structural, optical, and photovoltaic analyses revealed that the 1A2C configuration delivered the best performance, achieving a power conversion efficiency (PCE) of 15.33% (V_OC = 1.04 V, J_SC = 15.46 mA cm⁻² and FF = 71.50%), compared to 12.16% for the 1A1C reference. The superior efficiency of the 1A2C device is attributed to improved charge transport layer and suppressed carrier recombination at the ETL/perovskite interface, arising from optimized ETL architecture. This study demonstrates a simple yet effective route for enhancing PSC efficiency and stability, offering valuable insights for advancing perovskite device engineering.

三阳离子卤化物钙钛矿由于其优异的光电特性而成为钙钛矿太阳能电池（PSCs）极有前途的吸收剂。然而，诸如器件不稳定性和电流-电压滞后等挑战，通常源于ZnO和TiO2等富羟基电子传输层（etl），继续阻碍器件性能。在这项工作中，设计了具有不同层结构的基于SnO2的etl并将其集成到平面psc （FTO/SnO2/钙钛矿/Spiro-OMeTAD/Ag）中，以减轻这些限制。研究了三种ETL结构：由一个非晶和一个晶态SnO2层组成的参考双层（1A1C），带有双晶堆叠的单非晶层（1A2C），以及带有单晶层的双非晶层（2A1C）。全面的结构、光学和光电分析显示,1 a2c配置最好的性能,实现15.33%的功率转换效率(PCE) (VOC = 1.04 V, JSC = 15.46马  厘米−2和FF = 71.50%),12.16%为1糖化血红蛋白参考。优化的ETL结构改善了电荷传输层，抑制了ETL/钙钛矿界面的载流子复合，从而提高了器件的效率。本研究展示了一种简单而有效的提高PSC效率和稳定性的途径，为推进钙钛矿器件工程提供了有价值的见解。

{"title":"Effect of multilayer SnO2 architectures on charge transport and optical properties in triple-cation perovskite solar cells","authors":"Nur Farah Hanun Wira , Kai Jeat Hong , Chi Chin Yap , Kok-Keong Chong , Josephine Ying Chyi Liew , Hock Beng Lee , Jae-Wook Kang , Mohammad Hafizuddin Hj Jumali , Mohd Hafiz Mohd Zaid , Sin Tee Tan","doi":"10.1016/j.optmat.2026.117947","DOIUrl":"10.1016/j.optmat.2026.117947","url":null,"abstract":"<div><div>Triple-cation halide perovskites have emerged as highly promising absorbers for perovskite solar cells (PSCs) owing to their excellent intrinsic optoelectronic properties. Nevertheless, challenges such as device instability and current-voltage hysteresis, often originating from hydroxyl-rich electron transport layers (ETLs) like ZnO and TiO<sub>2</sub>, continue to hinder device performance. In this work, SnO<sub>2</sub>-based ETLs with different layer architectures were engineered and integrated into planar PSCs (FTO/SnO<sub>2</sub>/perovskite/Spiro-OMeTAD/Ag) to mitigate these limitations. Three ETL configurations were investigated: a reference bilayer comprising one amorphous and one crystalline SnO<sub>2</sub> layer (1A1C), a single amorphous layer with a double crystalline stack (1A2C), and a double amorphous layer with a single crystalline layer (2A1C). Comprehensive structural, optical, and photovoltaic analyses revealed that the 1A2C configuration delivered the best performance, achieving a power conversion efficiency (PCE) of 15.33% (V<sub>OC</sub> = 1.04 V, J<sub>SC</sub> = 15.46 mA cm<sup>−2</sup> and FF = 71.50%), compared to 12.16% for the 1A1C reference. The superior efficiency of the 1A2C device is attributed to improved charge transport layer and suppressed carrier recombination at the ETL/perovskite interface, arising from optimized ETL architecture. This study demonstrates a simple yet effective route for enhancing PSC efficiency and stability, offering valuable insights for advancing perovskite device engineering.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117947"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eco-friendly Ag2S QDs/PDPP3T inorganic-organic hybrid heterostructures for broadband photodetection 用于宽带光探测的环保Ag2S量子点/PDPP3T无机-有机杂化异质结构

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-18 DOI: 10.1016/j.optmat.2026.117975

Hanjia Hu , Shangbing He , Mengfei He , Haocheng He , Daxiu Tang , Xiaoning Guan , Guoxiang Wang , Chenjie Gu , Xiang Shen

Photodetectors featuring broadband detection capability, along with a facile and environmentally friendly preparation process, are critical and highly desirable for diverse optoelectronic applications. Herein, an environmentally friendly, easily fabricated Ag₂S QDs/PDPP3T inorganic-organic hybrid heterojunction was constructed to develop the 0D/2D broadband photodetector. In the experiment, the Ag₂S QDs were first synthesized by a microwave-heating method, and the photoresponse of the pure Ag₂S QDs detector was optimized via tuning the microwave power and reactant ratio. Subsequently, the PDPP3T was deposited on the Ag₂S QDs thin film to construct the heterostructure, aiming to further enhance the photo-sensing performance. The measurement results revealed that the device exhibited excellent performance within the visible to near-infrared wavelength region. Under laser illumination at 400, 532, and 900 nm, the responsivity, detectivity, and external quantum efficiency (EQE) reached 274.3 A/W, 4.62 × 10¹³ Jones, 849.4%; 225.8 A/W, 3.79 × 10¹³ Jones, 524.4%; and 280.7 A/W, 4.72 × 10¹³ Jones, 429.7%, respectively. Whereas the maximum responsivity, detectivity and EQE of the device reach 393.4 A/W 6.62 × 10¹³ Jones and 871%, respectively, which were measured at a wavelength of 700 nm. Moreover, the detector also demonstrated excellent response dynamics, with rise/fall times of 33.6/45.1 ms. In essence, these achievements were attributed to the enhanced light absorption of PDPP3T and optimized band alignment, which ultimately facilitated efficient carrier separation and collection.

具有宽带探测能力的光电探测器，以及简单和环保的制备工艺，是各种光电应用的关键和高度可取的。本文构建了一种环境友好、易于制造的Ag2S量子点/PDPP3T无机-有机杂化异质结，用于开发0D/2D宽带光电探测器。在实验中，首先采用微波加热的方法合成了Ag2S量子点，并通过调节微波功率和反应物比来优化纯Ag2S量子点探测器的光响应。随后，将PDPP3T沉积在Ag2S量子点薄膜上，构建异质结构，进一步提高光敏性能。测量结果表明，该器件在可见光至近红外波段范围内具有优异的性能。在400、532和900 nm激光照射下，响应率、探测率和外量子效率（EQE）达到274.3 A/W, 4.62 × 1013 Jones, 849.4%；225.8 A/W, 3.79 × 1013 Jones, 524.4%；280.7 A/W, 4.72 × 1013 Jones, 429.7%。在波长为700 nm处，器件的最大响应度、探测率和EQE分别达到393.4 A/W 6.62 × 1013 Jones和871%。此外，探测器还表现出良好的响应动力学，上升/下降时间为33.6/45.1 ms。本质上，这些成就归功于PDPP3T增强的光吸收和优化的波段对准，最终促进了高效的载流子分离和收集。

{"title":"Eco-friendly Ag2S QDs/PDPP3T inorganic-organic hybrid heterostructures for broadband photodetection","authors":"Hanjia Hu , Shangbing He , Mengfei He , Haocheng He , Daxiu Tang , Xiaoning Guan , Guoxiang Wang , Chenjie Gu , Xiang Shen","doi":"10.1016/j.optmat.2026.117975","DOIUrl":"10.1016/j.optmat.2026.117975","url":null,"abstract":"<div><div>Photodetectors featuring broadband detection capability, along with a facile and environmentally friendly preparation process, are critical and highly desirable for diverse optoelectronic applications. Herein, an environmentally friendly, easily fabricated Ag<sub>2</sub>S QDs/PDPP3T inorganic-organic hybrid heterojunction was constructed to develop the 0D/2D broadband photodetector. In the experiment, the Ag<sub>2</sub>S QDs were first synthesized by a microwave-heating method, and the photoresponse of the pure Ag<sub>2</sub>S QDs detector was optimized via tuning the microwave power and reactant ratio. Subsequently, the PDPP3T was deposited on the Ag<sub>2</sub>S QDs thin film to construct the heterostructure, aiming to further enhance the photo-sensing performance. The measurement results revealed that the device exhibited excellent performance within the visible to near-infrared wavelength region. Under laser illumination at 400, 532, and 900 nm, the responsivity, detectivity, and external quantum efficiency (EQE) reached 274.3 A/W, 4.62 × 10<sup>13</sup> Jones, 849.4%; 225.8 A/W, 3.79 × 10<sup>13</sup> Jones, 524.4%; and 280.7 A/W, 4.72 × 10<sup>13</sup> Jones, 429.7%, respectively. Whereas the maximum responsivity, detectivity and EQE of the device reach 393.4 A/W 6.62 × 10<sup>13</sup> Jones and 871%, respectively, which were measured at a wavelength of 700 nm. Moreover, the detector also demonstrated excellent response dynamics, with rise/fall times of 33.6/45.1 ms. In essence, these achievements were attributed to the enhanced light absorption of PDPP3T and optimized band alignment, which ultimately facilitated efficient carrier separation and collection.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117975"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0