Optical Materials: X最新文献_第5页

Low temperature recombination luminescence of Mg3Y2Ge3O12:Tb3+ Mg3Y2Ge3O12:Tb3+ 的低温重组发光

Optical Materials: X Pub Date : 2024-09-26 DOI: 10.1016/j.omx.2024.100368

U. Rogulis, A. Fedotovs, Dz Berzins, G. Krieke, L. Skuja, A. Antuzevics

{"title":"Low temperature recombination luminescence of Mg3Y2Ge3O12:Tb3+","authors":"U. Rogulis, A. Fedotovs, Dz Berzins, G. Krieke, L. Skuja, A. Antuzevics","doi":"10.1016/j.omx.2024.100368","DOIUrl":"10.1016/j.omx.2024.100368","url":null,"abstract":"<div><div>A study was conducted to examine the recombination processes in persistent phosphor Mg3Y2Ge3O12:Tb3+ garnet at low temperatures. Photoluminescence (PL), recombination luminescence (RL), electron paramagnetic resonance (EPR), and EPR detected by PL or RL were measured.</div><div>In samples with low Tb3+ concentration, a broad PL and RL band around 400–450 nm and characteristic Tb3+ lines were observed. However, in samples with high Tb3+ concentration, only Tb3+ lines were present. Both the broad-band and the line components exhibit long-lasting tunneling luminescence with hyperbolic decay. After 263 nm UV irradiation signals of intrinsic electron (F-type) and hole (V-type) trapping centres were observed in the EPR spectra. Such signals were also observed in RL-detected EPR spectra, indicating that the broad RL band at low Tb3+ concentrations originates from tunneling recombination between these intrinsic traps. At high Tb3+ concentrations, the RL-EPR spectrum was not observed, suggesting that intrinsic electron and Tb-related hole trapping centres probably participate in the tunneling recombination.</div></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"24 ","pages":"Article 100368"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Latent fingerprint detection and identification using yellow-emitting YOF:Pr3+ nanophosphor 使用黄色发光 YOF:Pr3+ 纳米荧光粉检测和识别潜伏指纹

Optical Materials: X Pub Date : 2024-09-24 DOI: 10.1016/j.omx.2024.100364

Sumedha Tamboli , Govind B. Nair , S.J. Dhoble , H.C. Swart

{"title":"Latent fingerprint detection and identification using yellow-emitting YOF:Pr3+ nanophosphor","authors":"Sumedha Tamboli , Govind B. Nair , S.J. Dhoble , H.C. Swart","doi":"10.1016/j.omx.2024.100364","DOIUrl":"10.1016/j.omx.2024.100364","url":null,"abstract":"<div><div>In this study, YOF:Pr3+ nanophosphors were synthesized using the microwave-assisted hydrothermal route. The structural and morphological properties of the nanophosphors calcined at different temperatures were studied in detail to optimize the synthesis conditions. The visible region and near-infrared (NIR) photoluminescence (PL) properties of the nanophosphors were obtained. Intense emission bands were observed in the blue and red regions under 250 nm excitation. The CIE chromaticity diagram showed that the color coordinates of the nanophosphors were located in the yellow region. The optimum Pr3+-concentration was found to be 0.002 mol fraction. The application of YOF: 0.002 Pr3+ nanophosphor for latent fingerprint detection was examined and evaluated on different types of surfaces. The nanophosphor demonstrated excellent adherence to the ridge patterns and sufficient sensitivity required for distinguishing between the ridges and the furrows. Different levels of detail were also observed that provided necessary information for the individualization of the fingerprints. The results suggest that the prepared YOF:Pr3+ nanophosphor can be a potential candidate for the rapid visualization and detection of latent fingerprints.</div></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"24 ","pages":"Article 100364"},"PeriodicalIF":0.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Threshold phenomena in photoluminescence of upconversion micro- and nanophosphors containing Er3+ and Yb3+ ions 含有 Er3+ 和 Yb3+ 离子的上转换微纳米磷的光致发光阈值现象

Optical Materials: X Pub Date : 2024-09-24 DOI: 10.1016/j.omx.2024.100363

M.G. Zuev , V.G. Il'ves , S.Yu. Sokovnin , A.A. Vasin , E.Yu. Zhuravleva

{"title":"Threshold phenomena in photoluminescence of upconversion micro- and nanophosphors containing Er3+ and Yb3+ ions","authors":"M.G. Zuev , V.G. Il'ves , S.Yu. Sokovnin , A.A. Vasin , E.Yu. Zhuravleva","doi":"10.1016/j.omx.2024.100363","DOIUrl":"10.1016/j.omx.2024.100363","url":null,"abstract":"<div><div>During electron beam evaporation of green-emitting (λex = 980 nm) silicate upconversion (UC-PL) bulk phosphors Sr2Y6.8YbEr0.2Si6O26, amorphous nanoparticles of size 2.7 nm are formed. The nanoparticles are globules formed during condensation of chains consisting of SiO4 tetrahedra. When the globules are excited with radiation of λex = 980 nm, the luminescence color becomes red and its intensity increases 80 times compared with bulk phosphors. It has been shown that luminescence is influenced by nonradiative processes between different transitions of Er3+ ions. There is a threshold population of the Er3+ and Yb3+ levels (level 2F5/2) in the region of relatively low pumping powers. Above this threshold, a sharp increase in the intensity of upconversion photoluminescence occurs. We show that the produced nanophosphors have a core consisting of a combination of SiO tetrahedra (n = 0, 1, 2), while Er, Yb, Sr, and Y ions are on the surface of the globules. Owing to this structure of the globules, the interaction of Er and Yb ions with nucleus defects, which usually suppress the luminescence, decreases. Probably, for this reason the luminescence intensity increases. Our findings reveal that new effective non-linear materials can be designed for converting IR radiation into visible radiation. The produced effective phosphors can hold promise as fluorescent probes in bioresearch, for fundamental therapy, as well as for new display technologies.</div></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"24 ","pages":"Article 100363"},"PeriodicalIF":0.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thin film deposition of organic-inorganic quinoline-tin dioxide p-n junction for optoelectronic devices 用于光电设备的有机-无机喹啉-二氧化锡 p-n 结的薄膜沉积

Optical Materials: X Pub Date : 2024-09-19 DOI: 10.1016/j.omx.2024.100361

Lucas P. Fonseca , Natália C. Oliveira , Lucas M. Martins , Luis V.A. Scalvi

{"title":"Thin film deposition of organic-inorganic quinoline-tin dioxide p-n junction for optoelectronic devices","authors":"Lucas P. Fonseca , Natália C. Oliveira , Lucas M. Martins , Luis V.A. Scalvi","doi":"10.1016/j.omx.2024.100361","DOIUrl":"10.1016/j.omx.2024.100361","url":null,"abstract":"<div>Tin dioxide (SnO2) is an oxide semiconductor with n-type characteristics, with high transparency in the UV–Vis, where the donors are usually associated with oxygen vacancies and interstitial tin ions. Quinoline derivatives (QD) are usually p-type semiconductors with emission in the blue range. We report photo-induced properties of the QD 4-(6-(diethylamino)-4-phenylquinolin-2-yl)benzoic acid and the combination with the inorganic semiconductor oxide SnO2, both layers in the form of thin film, which forms a heterostructure. Thin film is a very convenient format for integration in optoelectronics. Emission of the QD takes place in blue range (470–485 nm) and depends on the solvent when in solution, being used acetone and tetrahydrofuran (THF). However, when in the form of thin film, it does not depend on the solvent. Concerning the heterostructure, it is explored under distinct device architecture: 1) combination in a transport profile perpendicular to the films (transverse contacts) leading to a rectifying behavior similar to a p-n junction, which is evidence of the p-type-like electrical behavior of the QD; 2) in parallel conduction profile, where there seems to exist some sort of interfacial phenomenon similar to a two-dimensional electron gas (2-DEG), a property that can be explored in transparent high-mobility transistors.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"24 ","pages":"Article 100361"},"PeriodicalIF":0.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000731/pdfft?md5=31dcfd348578e4c0a89e8caf8245840f&pid=1-s2.0-S2590147824000731-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of polylactide as optical material 评估作为光学材料的聚乳酸

Optical Materials: X Pub Date : 2024-09-14 DOI: 10.1016/j.omx.2024.100360

Matthias Balthasar Kesting , Jörg Meyer , Gunnar Seide

{"title":"Assessment of polylactide as optical material","authors":"Matthias Balthasar Kesting , Jörg Meyer , Gunnar Seide","doi":"10.1016/j.omx.2024.100360","DOIUrl":"10.1016/j.omx.2024.100360","url":null,"abstract":"<div>Due to growing concerns considering environmental pollution, interest in bioplastics is rising. For technical applications, the respective materials have to meet high requirements. In optical applications these include transmittance, refractive index and dispersion but also dimensional stability, resistance against thermal influences and radiation induced degradation. Polylactide (PLA), a bio-based and biodegradable polymer, is already applied in high tech applications such as bioresorbable implants. The material shows favorable optical properties in its glassy state and excellent resistance against photodegradation. However, the application of PLA is hindered by its crystallization behavior. When exposed to temperatures above 55–60 °C it turns hazy. This might be avoided by hindering crystallization or tailoring crystal morphology. In this critical review, current applications of PLA are discussed and its broad use is shown. A literature search is carried out considering fully bio-based and biodegradable plastics for optical applications. The results show that currently no material is commercially available that meets all requirements set. Finally, an overview of the current state in research is provided, considering PLA-based materials with adapted crystallization behavior under the aspect of transparency. This includes use of additives, formulation of blends and material treatments. Finally, recommendations for the goal of achieving highly sustainable PLA-based optical components are given.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"24 ","pages":"Article 100360"},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259014782400072X/pdfft?md5=564c289071e8260d58e93b008bfb9d6c&pid=1-s2.0-S259014782400072X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mn2+ doped Zn2SiO4 phosphors: A threefold-mode sensing approach for optical thermometry in the visible region at 525 nm 掺杂 Mn2+ 的 Zn2SiO4 荧光粉：用于 525 纳米可见光区域光学温度测量的三重模式传感方法

Optical Materials: X Pub Date : 2024-09-14 DOI: 10.1016/j.omx.2024.100359

Nikifor Rakov , Francisco Matias , Yutao Xing , Glauco S. Maciel

{"title":"Mn2+ doped Zn2SiO4 phosphors: A threefold-mode sensing approach for optical thermometry in the visible region at 525 nm","authors":"Nikifor Rakov , Francisco Matias , Yutao Xing , Glauco S. Maciel","doi":"10.1016/j.omx.2024.100359","DOIUrl":"10.1016/j.omx.2024.100359","url":null,"abstract":"<div>Optical functional materials such as nanostructured silicates have been studied for photonics applications involving energy conversion. In this scenario, we studied Zn2SiO4:Mn2+ nanostructured powders prepared by combustion synthesis for optical thermometry based on photon downshifting. The structural analysis showed that Zn2SiO4 particles were found embedded in clustered silica nanoparticles. The photoluminescence analysis showed that the samples exhibit intense green emission (centered around 525 nm), corresponding to the electronic transition 4T1 → 6A1 of Mn2+, when exposed to a low power ultraviolet lamp (centered around 255 nm). The temperature sensing performance of this material was evaluated using three different methodologies, i.e. the luminescence decay time constant, the spectral full width at half maximum, and the luminescence peak intensity from the 4T1 → 6A1 radiative transition. The thermometric analysis based on luminescence peak intensity provided a maximum relative sensitivity of ∼4.9x10−3 K−1 at 498 K, while the decay lifetime and the spectral width at half maximum provided maximum relative temperature sensitivities of ∼2.9x10−3 K−1 at 523 K and ∼1.7x10−3 K−1 at 298 K, respectively.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"24 ","pages":"Article 100359"},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000718/pdfft?md5=02e3cd9e5163c2fbde5ab8025099e08c&pid=1-s2.0-S2590147824000718-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upconversion luminescence of pyrochlore structured (A2B2O7) phosphors 热绿结构（A2B2O7）荧光粉的上转换发光特性

Optical Materials: X Pub Date : 2024-09-12 DOI: 10.1016/j.omx.2024.100355

B.V. Naveen Kumar , H.C. Swart , R.E. Kroon

{"title":"Upconversion luminescence of pyrochlore structured (A2B2O7) phosphors","authors":"B.V. Naveen Kumar , H.C. Swart , R.E. Kroon","doi":"10.1016/j.omx.2024.100355","DOIUrl":"10.1016/j.omx.2024.100355","url":null,"abstract":"<div>The pyrochlore-structured (A2B2O7) compounds have emerged as a focal point in contemporary research and materials science, captivating attention for their intriguing properties such as photoluminescence, superconductivity, ionic mobility, and potential applications in high-temperature barrier coatings. Their potential application in up- or down-conversion photoluminescence further positions them for integration into a myriad of optoelectronic and sensing devices. Building on extensive prior research, this review delves into the upconversion (UC) luminescence properties of numerous pyrochlore-structured host materials (titanates, zirconates, hafnates, and ytterbium pyrochlores), specifically those doped with rare earth ions. While these materials may share similar chemical and structural characteristics, their luminescent capabilities exhibit significant variation upon rare earth ion doping. The phase transitions of various pyrochlore-structured compounds with respect to cation ratio, the relationship between crystal structure, doping concentrations, and UC luminescent properties in pyrochlore-structured compounds are summarized in detail. Through controlled doping strategies and structural adjustments, researchers have been able to tailor the luminescence properties of pyrochlore structured compounds to meet specific application requirements. The intricate exploration of the UC luminescence properties of pyrochlore-structured compounds, especially when doped with rare earth ions, showcases the rich potential for these materials in a wide array of applications across various fields, from advanced sensing technologies to innovative optoelectronic devices, paving the way for exciting advancements in materials science and beyond.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"24 ","pages":"Article 100355"},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000676/pdfft?md5=d306776b4ced6aa08042b9934bfcaf1f&pid=1-s2.0-S2590147824000676-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of the optical and electrical properties of zinc oxide by terahertz time domain ellipsometry 利用太赫兹时域椭偏仪研究氧化锌的光学和电学特性

Optical Materials: X Pub Date : 2024-09-12 DOI: 10.1016/j.omx.2024.100352

Zixi Zhao , Verdad C. Agulto , Toshiyuki Iwamoto , Kosaku Kato , Kohei Yamanoi , Toshihiko Shimizu , Nobuhiko Sarukura , Takashi Fujii , Tsuguo Fukuda , Masashi Yoshimura , Makoto Nakajima

引用次数: 0

A review of the optically and thermally stimulated luminescence properties of aluminosilicates 铝硅酸盐的光学和热激发发光特性综述

Optical Materials: X Pub Date : 2024-09-12 DOI: 10.1016/j.omx.2024.100351

S.W.S. McKeever

引用次数: 0

Electrophysical and thermoelectric properties and crystal structure of the formed Mn4Si7 thin vacuum coatings 已形成的 Mn4Si7 真空薄涂层的电物理特性、热电性能和晶体结构

Optical Materials: X Pub Date : 2024-09-11 DOI: 10.1016/j.omx.2024.100353

B.D. Igamov , G.T. Imanova , V.V. Loboda , V.V. Zhurikhina , I.R. Bekpulatov , A.I. Kamardin

引用次数: 0