Optical Materials最新文献

Enhancement of upconversion in Nd3+/Yb3+ co-doped tellurite glass microspheres produced by a plasma arc

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-25 DOI: 10.1016/j.optmat.2025.117046

Snigdha Thekke Thalakkal , Davor Ristić , Zsolt Kis , Hrvoje Gebavi , Mile Ivanda

{"title":"Enhancement of upconversion in Nd3+/Yb3+ co-doped tellurite glass microspheres produced by a plasma arc","authors":"Snigdha Thekke Thalakkal , Davor Ristić , Zsolt Kis , Hrvoje Gebavi , Mile Ivanda","doi":"10.1016/j.optmat.2025.117046","DOIUrl":"10.1016/j.optmat.2025.117046","url":null,"abstract":"<div><div>In this paper, we report enhanced upconversion emission in Nd<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> and Yb<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> co-doped tellurite glass microspheres, fabricated via the plasma torch method. The upconversion efficiency was found to be much stronger in the produced microspheres in respect to the precursor glass, which we attribute to the change of luminiscence properties induced by the microsphere production process. The samples were excited using a 980 nm laser, and the upconversion behavior was analyzed under increasing power using Raman spectroscopy. The rapid thermal quenching of the glass powder during microsphere formation significantly enhanced the upconversion efficiency observed in the spherical samples. Emission and absorption characteristics were comprehensively analyzed using Raman and UV–visible spectroscopy, respectively. Furthermore, lifetime luminescence measurements were performed at emission wavelengths of 590 nm, 870 nm, and 980 nm.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"164 ","pages":"Article 117046"},"PeriodicalIF":3.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876568","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

High-performance all-dielectric nano-gratings for advanced optical applications: Fabrication and characterization

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-24 DOI: 10.1016/j.optmat.2025.116853

Xiaoyu Zhang , Huabin Yang , Zihao Wu , Can Weng

{"title":"High-performance all-dielectric nano-gratings for advanced optical applications: Fabrication and characterization","authors":"Xiaoyu Zhang , Huabin Yang , Zihao Wu , Can Weng","doi":"10.1016/j.optmat.2025.116853","DOIUrl":"10.1016/j.optmat.2025.116853","url":null,"abstract":"<div><div>All-dielectric nano-grating structures exhibit exceptional optical properties, combining robust material stability with precise wavelength modulation, positioning them as highly suitable for advanced optical applications. This study introduces Si<sub>3</sub>N<sub>4</sub>-based nano-gratings fabricated on polycarbonate (PC) substrates using an optimized injection molding process. The resulting gratings demonstrate superior optical performance, including high reflectivity (>85 %), narrowband spectral response (full-width at half-maximum, FWHM <10 nm), and minimal sideband reflection (<3 %). Finite-difference time-domain (FDTD) simulations guided the optimization of key structural parameters, revealing their critical effects on optical performance. Experimental validation confirmed the gratings' reproducibility of up to 98 % and high structural fidelity, achieved under optimized processing conditions. These findings highlight the scalability and versatility of the proposed fabrication process, making it a promising approach for producing high-performance optical components such as filters, sensors, and displays. The work underscores the application potential of all-dielectric nano-gratings in next-generation optoelectronic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"164 ","pages":"Article 116853"},"PeriodicalIF":3.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877347","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

Enhanced mid-infrared luminescent properties of Ho,Re:CNGG (RePr, Eu, Tb) crystals co-doped with deactivating ions

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-24 DOI: 10.1016/j.optmat.2025.117091

Yong Wei , Ziyan He , Chuang Yang , Jian Liu , Jiahong Jin , Liang Luo , Xiaodong Xu

{"title":"Enhanced mid-infrared luminescent properties of Ho,Re:CNGG (RePr, Eu, Tb) crystals co-doped with deactivating ions","authors":"Yong Wei , Ziyan He , Chuang Yang , Jian Liu , Jiahong Jin , Liang Luo , Xiaodong Xu","doi":"10.1016/j.optmat.2025.117091","DOIUrl":"10.1016/j.optmat.2025.117091","url":null,"abstract":"<div><div>Crystals of 2 at.% Ho:CNGG co-doped with 0.2 at.% deactivating ions (Pr<sup>3+</sup>, Eu<sup>3+</sup>, Tb<sup>3+</sup>) were successfully grown using the micro-pulling-down (<em>μ</em>-PD) technique for the first time. Detailed investigations were conducted on absorption spectra, fluorescence spectra, and lifetime decay curves. The 2 at.% Ho, 0.2 at.% Pr:CNGG crystal exhibits a broad absorption band at 1142 nm, with full width at half maximum (FWHM) values of 88.5 nm. This crystal composition shows the most intense emission at 2860 nm, with FWHM of 181 nm. The luminescent lifetime ratio (<sup>5</sup>I<sub>6</sub>/<sup>5</sup>I<sub>7</sub>) and transition efficiencies of Ho,Pr:CNGG at approximately 3.0 μm are also the highest, measuring 0.107 and 70.48 % (0.105 and 69.96 % for Ho,Eu:CNGG, 0.090 and 65.08 % for Ho,Tb:CNGG). These results suggest that Pr<sup>3+</sup> demonstrates superior performance in mitigating self-termination and enhancing population inversion compared to the other deactivating ions.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"164 ","pages":"Article 117091"},"PeriodicalIF":3.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876569","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

Effect of selenium doping on the deposition and properties of cadmium sulfide thin films grown by a chemical bath deposition technique

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-23 DOI: 10.1016/j.optmat.2025.117087

Primavera López-Salazar , Gabriel Juárez–Díaz , José Luis Sosa-Sánchez , Joel Díaz-Reyes , Ana Guadalupe Martínez-Morales

{"title":"Effect of selenium doping on the deposition and properties of cadmium sulfide thin films grown by a chemical bath deposition technique","authors":"Primavera López-Salazar , Gabriel Juárez–Díaz , José Luis Sosa-Sánchez , Joel Díaz-Reyes , Ana Guadalupe Martínez-Morales","doi":"10.1016/j.optmat.2025.117087","DOIUrl":"10.1016/j.optmat.2025.117087","url":null,"abstract":"<div><div>The present study highlights the changes in various physical properties of cadmium sulfide (CdS) thin films induced by doping with the chalcogenide ion Se. The films were obtained by a chemical bath deposition technique at low temperature, good quality thin films were synthesized, with the advantage of doping in-synthesis without the need for additional step. The structural analysis was carried out using grazing incidence X-ray diffraction, revealing that the incorporation of selenium led to the formation of two crystalline phases of CdS and CdSe, and a decrease in their crystallite size. The transmittance spectrum shows that the added selenium shifts the transmission region to higher wavelengths and reduces the transmittance. The films composition was determined by wavelength-dispersive X-ray fluorescence, revealing a lower fraction of selenium in the films than in the bath solution. By the oscillations in transmittance the film thicknesses were estimated, and it was found that they are reduced by the incorporation of selenium, this is in accordance with the decrease of the intensity of the X-ray diffraction and X-ray fluorescence peaks. The photoluminescence study shows that the higher energy emissions (close to 2.0 and 2.2 eV) are reduced and eliminated with the incorporation of Se into the material. This is attributed to shallow electron traps induced by the metal ion selenium. The characterization of the films indicates that incorporating selenourea into the chemical bath, using the specified working conditions, modifies the film deposition process and results in a red-shift of the absorption region.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"164 ","pages":"Article 117087"},"PeriodicalIF":3.8,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873264","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

Structure regulation induced novel narrow-band blue light-emitting Eu2+-Activated nitroaluminosilicate phosphor for WLEDs and FEDs applications

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-23 DOI: 10.1016/j.optmat.2025.117085

Quansheng Wu , Yuanmin Zhang , Jingjing Chen , Chunxiang Chen , Faliang Cao , Weijian Wang , Xubo Zhu , Jiasheng Zeng , Jianyan Ding

{"title":"Structure regulation induced novel narrow-band blue light-emitting Eu2+-Activated nitroaluminosilicate phosphor for WLEDs and FEDs applications","authors":"Quansheng Wu , Yuanmin Zhang , Jingjing Chen , Chunxiang Chen , Faliang Cao , Weijian Wang , Xubo Zhu , Jiasheng Zeng , Jianyan Ding","doi":"10.1016/j.optmat.2025.117085","DOIUrl":"10.1016/j.optmat.2025.117085","url":null,"abstract":"<div><div>Developing novel narrow-band light-emitting phosphors remains a critical area of research, particularly for nitride-based materials, which are regarded as promising host for phosphor. In this study, a narrow-band blue light emission was achieved in Eu<sup>2+</sup>-activated nitroaluminosilicate MgAl<sub>4</sub>SiO<sub>3</sub>N<sub>4</sub> through structural optimization of the AlON-related phase Al<sub>6</sub>O<sub>3</sub>N<sub>4</sub>. Mg<sup>2+</sup> ions were incorporated into the host lattice to partially substitute for Al<sup>3+</sup> ions, while co-doped Si<sup>4+</sup> ions were utilized to maintain charge neutrality. Leveraging the high reactivity of MgO, MgAl<sub>4</sub>SiO<sub>3</sub>N<sub>4</sub> was successfully synthesized under relatively mild conditions, in contrast to the initial phase of Al<sub>6</sub>O<sub>3</sub>N<sub>4</sub>. Furthermore, through structural optimization, Eu<sup>2+</sup>-activated MgAl<sub>4</sub>SiO<sub>3</sub>N<sub>4</sub> exhibits remarkable photoluminescence and cathodoluminescence performance. When excited by near-ultraviolet light, MgAl<sub>4</sub>SiO<sub>3</sub>N<sub>4</sub>:Eu<sup>2+</sup> emits intense narrow-band blue light, characterized by a full width at half maximum (FWHM) of 0.338 eV. The material exhibits an internal quantum efficiency as high as 74 %. The structure-property relationship of Eu<sup>2+</sup> in MgAl<sub>4</sub>SiO<sub>3</sub>N<sub>4</sub> was systematically investigated in this study, elucidating the photoluminescence characteristics of Eu<sup>2+</sup> ions within the MgAl<sub>4</sub>SiO<sub>3</sub>N<sub>4</sub> host. The results may establish an efficient pathway for exploring more promising silicate- or aluminum nitride-based narrow-band light-emitting phosphors.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"164 ","pages":"Article 117085"},"PeriodicalIF":3.8,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877346","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

Bimetallic Ln(III)-MOF (Ln = Gd, Tb) with excitation wavelength-dependent luminescence properties for advanced anti-counterfeiting

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-23 DOI: 10.1016/j.optmat.2025.117084

Wei Gao, Zihan Chen, Lu Zhang, Guoxian Gu, Wenjun Zhang

引用次数: 0

Photoluminescence and thermal study of zinc selenide nanocrystals embedded in poly(arylene ether ketone) matrix

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-21 DOI: 10.1016/j.optmat.2025.117077

Yinan Zhang, Jiajun Sun

引用次数: 0

Superior photo-diode performance of dual-phase ZrO2 spheres as interfacial layers in Cu/ZrO2/n-Si MIS structured Schottky barrier diode

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-21 DOI: 10.1016/j.optmat.2025.117076

P. Gayathri , T. Akila , V. Balasubramani , P. Balraju , M. Aslam Manthrammel , Mohd Shkir

{"title":"Superior photo-diode performance of dual-phase ZrO2 spheres as interfacial layers in Cu/ZrO2/n-Si MIS structured Schottky barrier diode","authors":"P. Gayathri , T. Akila , V. Balasubramani , P. Balraju , M. Aslam Manthrammel , Mohd Shkir","doi":"10.1016/j.optmat.2025.117076","DOIUrl":"10.1016/j.optmat.2025.117076","url":null,"abstract":"<div><div>In this present work, ZrO<sub>2</sub> interfacial layers were formed using a unique Jet Nebulizer Spray Pyrolysis (JNSP) technique at various mole concentrations of 0.10, 0.15, 0.20 and 0.25 M. This technique facilitated the fabrication of highly sensitive devices exhibiting positive photo-responses to the dual-phase ZrO<sub>2</sub> structure between copper (Cu) as the metal and n-type silicon (n-Si) as the semiconductor. XRD revealed orthorhombic-to-cubic phase transitions with increasing crystallite size of 20 nm as the molar concentration rises. FE-SEM showed a morphological shift from cuboidal to spherical nanoparticles with higher concentrations. UV–Vis spectroscopy indicated an enhanced optical absorption and a widened bandgap (4.00 eV). XPS confirmed the presence of Zr<sup>4+</sup> and O<sup>2−</sup> ions, aligning with EDAX and XRD results. Cu/ZrO<sub>2</sub>/n-Si MIS diodes exhibited improved performance under light and dark conditions, with a decreased (n = 2.10) under illumination and increased Ф<sub>B</sub> (0.742 eV). Significant improvements were seen in photo-diode parameters like Photo-sensitivity (P<sub>S</sub>), Responsivity (R), Quantum Efficiency (QE), and Detectivity (D∗), with detectivity rising to 1.19 × 10<sup>7</sup> Jones. These results demonstrate Cu/ZrO<sub>2</sub>/n-Si MIS diodes potential for advanced photovoltaic devices and photodetector applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"164 ","pages":"Article 117076"},"PeriodicalIF":3.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870758","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

Highly solar-reflective calcium phosphate biomaterials through wet chemical precipitation

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-18 DOI: 10.1016/j.optmat.2025.117021

Andrew Caratenuto , Nathaniel LeCompte , Yi Zheng

{"title":"Highly solar-reflective calcium phosphate biomaterials through wet chemical precipitation","authors":"Andrew Caratenuto , Nathaniel LeCompte , Yi Zheng","doi":"10.1016/j.optmat.2025.117021","DOIUrl":"10.1016/j.optmat.2025.117021","url":null,"abstract":"<div><div>Calcium phosphate compounds are critical to an expansive collection of applications within the medical field. In addition, calcium phosphates have been recently exemplified as strong candidates for solar reflective materials, supporting the realization of future sustainability goals. In any of these valuable use cases, an accurate understanding of the composition, morphology, and optical properties is critical to design calcium phosphate materials for target applications. In this work, we present compositional and morphological characterizations for a wide variety of calcium phosphate compounds synthesized through varying the parameters of a wet chemical synthesis method. The influence of reactant pH, reaction temperature, and calcination temperature choices are discussed with respect to the resulting microscale and nanoscale feature sizes as well as the abundance of different calcium phosphate phases. Further, the synthesized calcium phosphates are exemplified as high-performance broadband solar reflectance materials, with normalized reflectance values ranging from 0.93 to 0.98. This feature is enabled by the synergy between their optical properties and morphologies, which produces an efficient dispersion of scattering behaviors throughout the entire solar wavelength regime. The influence of the chosen synthesis parameters on reflectance performance is discussed in detail. This provides key takeaways for sustainable applications, especially the development of passive radiative cooling coatings and paints.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"164 ","pages":"Article 117021"},"PeriodicalIF":3.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864247","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

Graphitic-C3N4 modified by 9-phenylcarbazole groups and used as a metal-free phosphor in white light-emitting diodes

IF 3.8 3区材料科学

Optical Materials Pub Date : 2025-04-18 DOI: 10.1016/j.optmat.2025.117075

Long Wang , Jinghao Zhang , Huaijun Tang , Guoyun Meng , Xiang Li , Aijing Jiang , Yibing Wu , Shanglan Xian , Yonghui He , Qiang Zhou , Zhengliang Wang

{"title":"Graphitic-C3N4 modified by 9-phenylcarbazole groups and used as a metal-free phosphor in white light-emitting diodes","authors":"Long Wang , Jinghao Zhang , Huaijun Tang , Guoyun Meng , Xiang Li , Aijing Jiang , Yibing Wu , Shanglan Xian , Yonghui He , Qiang Zhou , Zhengliang Wang","doi":"10.1016/j.optmat.2025.117075","DOIUrl":"10.1016/j.optmat.2025.117075","url":null,"abstract":"<div><div>Graphitic-C<sub>3</sub>N<sub>4</sub> (g-C<sub>3</sub>N<sub>4</sub>) and some of its derivatives can be used as cheap and renewable rare-earth-free phosphors for replacing widely-used rare-earth-based phosphors in LEDs. Here, a 9-phenylcarbazole modified g-C<sub>3</sub>N<sub>4</sub> derivative (g–C<sub>3</sub>N<sub>4</sub>–PhCz) was synthesized via thermal polymerization by using melamine as the main precursor and 6-(4-(9<em>H</em>-carbazol-9-yl)phenyl)-1,3,5-triazine-2,4-diamine as the molecular dopant at the molar ratio of 30:1, 450 °C, for 2 h. Such g–C<sub>3</sub>N<sub>4</sub>–PhCz emits bright greenish-yellow light with a high quantum yield of 30.1 %, which is much higher than that of bulk g-C<sub>3</sub>N<sub>4</sub> (around 5.0 %). Moreover, it shows high thermal stability (thermal decomposition temperature is up to 465 °C) and low thermal quenching property (photoluminescence intensity retains 91.5 % at 110 °C relative to that at 30 °C). Under the excitation of GaN-based blue light chips, a series of high-quality cold/neutral/warm white LEDs were successfully fabricated by using g–C<sub>3</sub>N<sub>4</sub>–PhCz together with red-emitting K<sub>2</sub>SiF<sub>6</sub>:Mn<sup>4+</sup> (also rare-earth-free) as phosphors. For example, the Commission Internationale de l'Éclairage (CIE) chromaticity coordinates can reach (0.3320, 0.3330) which is very close to (0.3333, 0.3333) of pure white light. Relative to the luminescent property of g-C<sub>3</sub>N<sub>4</sub>, that of g–C<sub>3</sub>N<sub>4</sub>–PhCz has been significantly improved and it is more suitable for white LEDs.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"164 ","pages":"Article 117075"},"PeriodicalIF":3.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850141","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