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Luminescent Materials

A topical collection in Materials (ISSN 1996-1944). This collection belongs to the section "Optical and Photonic Materials".

Viewed by 15778

Editor

Prof. Dr. Hubertus Hintzen

E-Mail Website
Collection Editor
Group Luminescent Materials, Section Fundamental Aspects of Materials and Energy, Faculty of Applied Sciences, Delft University of Technology, Delft, The Netherlands
Interests: nitride; phosphor; luminescence; optical properties
Special Issues, Collections and Topics in MDPI journals

Topical Collection Information

Dear Colleagues,

After publishing several successful Special Issues on Luminescent Materials, we would like to announce the start of the publication of a collection on Luminescent Materials. The objective is to highlight the progress and prospects of curiosity-driven academic research on novel phosphor materials with new or improved properties, as well as of innovative developments of industrial applications, in particular in emerging fields of energy, mobility, health, food and security. By discussing the new results in the context of known information, the publication is not only helpful as a tutorial introduction for novices in the field, but also serves as an updated overview for those who are more experienced. Therefore, review publications on experimental or theoretical studies of different types of luminescent materials (powders, nano-particles, ceramics, thin films, single crystals, glasses) are of special interest. Because of the multidisciplinary nature of the discussed topics, the publications will be of interest to solid state chemists and spectroscopic physicists, as well as to materials scientists and engineers.

Other editions of “Luminescent Materials”

Techniques and Methods for Advanced Characterization of Luminescent Materials Luminescent Materials 2013

Luminescent Materials

Prof. Hubertus Hintzen
Guest Editor

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Keywords

  • luminescent material, phosphor
  • luminescence, fluorescence, phosphorescence
  • photoluminescence, cathodoluminescence, electroluminescence, X-ray luminescence, mechanoluminescence, triboluminescence, persistent luminescence
  • spectroscopy

Published Papers (6 papers)

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2022

Jump to: 2021, 2020, 2018

12 pages, 3151 KiB  
Article
Nd3+, Yb3+:YF3 Optical Temperature Nanosensors Operating in the Biological Windows
by Maksim Pudovkin, Ekaterina Oleynikova, Airat Kiiamov, Mikhail Cherosov and Marat Gafurov
Materials 2023, 16(1), 39; https://doi.org/10.3390/ma16010039 - 21 Dec 2022
Cited by 2 | Viewed by 1219
Abstract
This work is devoted to the study of thermometric performances of Nd3+ (0.1 or 0.5 mol.%), Yb3+ (X%):YF3 nanoparticles. Temperature sensitivity of spectral shape is related to the phonon-assisted nature of energy transfer (PAET) between Nd3+ and Yb3+ [...] Read more.
This work is devoted to the study of thermometric performances of Nd3+ (0.1 or 0.5 mol.%), Yb3+ (X%):YF3 nanoparticles. Temperature sensitivity of spectral shape is related to the phonon-assisted nature of energy transfer (PAET) between Nd3+ and Yb3+). However, in the case of single-doped Nd3+ (0.1 or 0.5 mol.%):YF3 nanoparticles, luminescence decay time (LDT) of 4F3/2 level of Nd3+ in Nd3+ (0.5 mol.%):YF3 decreases with the temperature decrease. In turn, luminescence decay time in Nd3+ (0.1 mol.%):YF3 sample remains constant. It was proposed, that at 0.5 mol.% the cross-relaxation (CR) between Nd3+ ions takes place in contradistinction from 0.1 mol.% Nd3+ concentration. The decrease of LDT with temperature is explained by the decrease of distances between Nd3+ with temperature that leads to the increase of cross-relaxation efficiency. It was suggested, that the presence of both CR and PAET processes in the studied system (Nd3+ (0.5 mol.%), Yb3+ (X%):YF3) nanoparticles provides higher temperature sensitivity compared to the systems having one process (Nd3+ (0.1 mol.%), Yb3+ (X%):YF3). The experimental results confirmed this suggestion. The maximum relative temperature sensitivity was 0.9%·K−1 at 80 K. Full article
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10 pages, 3573 KiB  
Article
Energy Transfer from Pr3+ to Gd3+ and Upconversion Photoluminescence Properties of Y7O6F9:Pr3+, Gd3+
by Yang Sun, Yangbo Wang, Chengchao Hu, Xufeng Zhou, Jigong Hao, Wei Li and Huaiyong Li
Materials 2022, 15(21), 7680; https://doi.org/10.3390/ma15217680 - 01 Nov 2022
Cited by 3 | Viewed by 1424
Abstract
Upconversion materials have numerous potential applications in light energy utilization due to their unique optical properties. The use of visible light excitation to obtain ultraviolet emission is a promising technology with broad application prospects, while relevant research is absent. A series of Pr [...] Read more.
Upconversion materials have numerous potential applications in light energy utilization due to their unique optical properties. The use of visible light excitation to obtain ultraviolet emission is a promising technology with broad application prospects, while relevant research is absent. A series of Pr3+, Gd3+ doped Y7O6F9 phosphors were synthesized by traditional solid–state reaction. X-ray diffraction, scanning electronic microscopy, steady-state photoluminescence spectra, a decay dynamic, and upconversion emission spectra of the samples were studied. Under the excitation of 238 nm, the energy transfer from Pr3+ to Gd3+ was realized and a strong ultraviolet B emission due to the 6P7/2→8S7/2 transition of the Gd3+ ions was achieved. Under the excitation of a 450 nm blue laser, Pr3+ absorbed two blue photons to realize the upconversion process and then transferred the energy to Gd3+ to obtain the ultraviolet B emission. Full article
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Figure 1

19 pages, 4196 KiB  
Article
Bright UV-C Phosphors with Excellent Thermal Stability—Y1−xScxPO4 Solid Solutions
by Dmitry Spassky, Andrey Vasil’ev, Vitali Nagirnyi, Irina Kudryavtseva, Dina Deyneko, Ivan Nikiforov, Ildar Kondratyev and Boris Zadneprovski
Materials 2022, 15(19), 6844; https://doi.org/10.3390/ma15196844 - 02 Oct 2022
Cited by 1 | Viewed by 1313
Abstract
The structural and luminescence properties of undoped Y1−xScxPO4 solid solutions have been studied. An intense thermally stable emission with fast decay (τ1/e ~ 10−7 s) and a band position varying from 5.21 to 5.94 eV [...] Read more.
The structural and luminescence properties of undoped Y1−xScxPO4 solid solutions have been studied. An intense thermally stable emission with fast decay (τ1/e ~ 10−7 s) and a band position varying from 5.21 to 5.94 eV depending on the Sc/Y ratio is detected and ascribed to the 2p O-3d Sc self-trapped excitons. The quantum yield of the UV-C emission, also depending on the Sc/Y ratio, reaches 34% for the solid solution with x = 0.5 at 300 K. It is shown by a combined analysis of theoretical and experimental data that the formation of Sc clusters occurs in the solid solutions studied. The clusters facilitate the creation of energy wells at the conduction band bottom, which enables deep localization of electronic excitations and the creation of luminescence centers characterized by high quantum yield and thermal stability of the UV-C emission. Full article
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Figure 1

2021

Jump to: 2022, 2020, 2018

11 pages, 3421 KiB  
Article
Structure and Photoluminescence Properties of Thermally Synthesized V2O5 and Al-Doped V2O5 Nanostructures
by Chih-Chiang Wang, Chia-Lun Lu, Fuh-Sheng Shieu and Han C. Shih
Materials 2021, 14(2), 359; https://doi.org/10.3390/ma14020359 - 13 Jan 2021
Cited by 19 | Viewed by 3212
Abstract
Al-free and Al-doped V2O5 nanostructures were synthesized by a thermal-chemical vapor deposition (CVD) process on Si(100) at 850 °C under 1.2 × 10−1 Torr via a vapor-solid (V-S) mechanism. X-ray diffraction (XRD), Raman, and high-resolution transmission electron microscopy (HRTEM) [...] Read more.
Al-free and Al-doped V2O5 nanostructures were synthesized by a thermal-chemical vapor deposition (CVD) process on Si(100) at 850 °C under 1.2 × 10−1 Torr via a vapor-solid (V-S) mechanism. X-ray diffraction (XRD), Raman, and high-resolution transmission electron microscopy (HRTEM) confirmed a typical orthorhombic V2O5 with the growth direction along [110]-direction of both nanostructures. Metallic Al, rather than Al3+-ion, was detected by X-ray photoelectron spectroscopy (XPS), affected the V2O5 crystallinity. The photoluminescence intensity of V2O5 nanostructure at 1.77 and 1.94 eV decreased with the increasing Al-dopant by about 61.6% and 59.9%, attributing to the metallic Al intercalated between the V2O5-layers and/or filled in the oxygen vacancies, which behaved as electron sinks. Thus the Al-doped V2O5 nanostructure shows the potential applications in smart windows and the electrodic material in a Li-ion battery. Full article
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2020

Jump to: 2022, 2021, 2018

13 pages, 5558 KiB  
Article
Synthesis, Structure, Morphology, and Luminescent Properties of Ba2MgWO6: Eu3+ Double Perovskite Obtained by a Novel Co-Precipitation Method
by Thi Hong Quan Vu, Bartosz Bondzior, Dagmara Stefańska, Natalia Miniajluk and Przemysław J. Dereń
Materials 2020, 13(7), 1614; https://doi.org/10.3390/ma13071614 - 01 Apr 2020
Cited by 29 | Viewed by 3301
Abstract
Eu3+ doped Ba2MgWO6 (BMW) double-perovskite was successfully synthesized for the first time by the co-precipitation method. The synthesis procedure, crystal structure, as well as morphology of obtained samples are presented. Domination of the 5D0–7F [...] Read more.
Eu3+ doped Ba2MgWO6 (BMW) double-perovskite was successfully synthesized for the first time by the co-precipitation method. The synthesis procedure, crystal structure, as well as morphology of obtained samples are presented. Domination of the 5D0–7F1 magnetic–dipole over forced electric–dipole transitions in the emission spectra indicates that Eu3+ ions are located in the high symmetry site with inversion center. Only one emission line assigned to the 5D0–7F0 transition was observed, confirming that europium substituted for only one host cation site. The photoluminescence excitation (PLE) spectrum is dominated by a strong and broad band related to the O2− → Eu3+ and O2− → W6+ charge transfer. The decay of the emission from the 5D0 and 5D1 levels was investigated. The temperature-dependent emission spectra showed that the T0.5 is equal to 350 K. Extinguishing mechanisms of the Eu3+ luminescence in the studied host are discussed. Full article
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2018

Jump to: 2022, 2021, 2020

10 pages, 4389 KiB  
Article
Chromaticity-Tunable and Thermal Stable Phosphor-in-Glass Inorganic Color Converter for High Power Warm w-LEDs
by Zikun Chen, Bo Wang, Xiaoshuang Li, Dayu Huang, Hongyang Sun and Qingguang Zeng
Materials 2018, 11(10), 1792; https://doi.org/10.3390/ma11101792 - 21 Sep 2018
Cited by 15 | Viewed by 3715
Abstract
In this work, an aluminate silicate garnet phosphor, Y2Mg2Al2Si2O12:Ce3+ (YMASG:Ce3+), exhibiting strong and broad yellow-orange emission, was successfully synthesized. Attributed to the double cation substitution of YAG:Ce3+, which [...] Read more.
In this work, an aluminate silicate garnet phosphor, Y2Mg2Al2Si2O12:Ce3+ (YMASG:Ce3+), exhibiting strong and broad yellow-orange emission, was successfully synthesized. Attributed to the double cation substitution of YAG:Ce3+, which led to a compression effect, a redshift was observed with respect to YAG:Ce3+. More importantly, a transparent phosphor-in-glass (PiG) sample was obtained by incorporating the phosphor YMASG:Ce3+ into a special low-melting precursor glass. The energy dispersive spectrometer (EDS) mapping analysis of the as-prepared PiG sample indicates that YMASG:Ce3+ was successfully incorporated into the glass host, and its powders were uniformly distributed in glass. The photoluminescence intensity of the PiG sample was higher than that of the powder due to its relatively high thermal conductivity. Additionally, the combination of the PiG sample and a blue high-power chip generated a modular white LED with a luminous efficacy of 54.5 lm/W, a correlated color temperature (CCT) of 5274 K, and a color rendering index (CRI) of 79.5 at 350 mA. Full article
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