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Crystals
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Research Progress of Photoluminescent Materials
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Research Progress of Photoluminescent Materials

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: 10 December 2025 | Viewed by 4402

Special Issue Editor

Dr. Lei Han

E-Mail Website
Guest Editor
College of Rare Earths, Jiangxi University of Science and Technology, Ganzhou 341000, China
Interests: luminescent materials; transparent glass–ceramics; functional glasses; phosphors; fluorescent ceramics; photoluminescence

Special Issue Information

Dear Colleagues,

This Special Issue aims to provide a comprehensive review of the latest advancements in the field of photoluminescent materials, focusing on their synthesis, characterization, and application. Photoluminescent materials play a crucial role in a wide range of technologies, including optoelectronics, biomedical imaging, sensor systems, and sustainable energy solutions. This Special Issue highlights pioneering research on new materials such as organic semiconductors, quantum dots, perovskites, and two-dimensional materials, with an emphasis on enhancing photoluminescent properties like high quantum efficiency, tuneable emission spectra, and improved stability.

The scope of this Special Issue covers both the fundamental principles of photoluminescence and the practical challenges of integrating these materials into devices, such as light-emitting diodes (LEDs), displays, lasers, and biosensors. By consolidating the most recent research, this Special Issue seeks to provide valuable insights into the future direction of photoluminescent materials, underscoring their potential to drive the development of next-generation technologies across various fields.

Dr. Lei Han
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • photoluminescence
  • luminescent materials
  • optoelectronic devices
  • advanced photonic applications
  • optoelectronics and photonics

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

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Research

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19 pages, 4231 KiB  
Article
Design and Synthesis of a New Photoluminescent 2D Coordination Polymer Employing a Ligand Derived from Quinoline and Pyridine
by Andrzej Kochel, Małgorzata Hołyńska, Aneta Jezierska and Jarosław J. Panek
Crystals 2025, 15(8), 691; https://doi.org/10.3390/cryst15080691 - 30 Jul 2025
Viewed by 529
Abstract
Application of organic ligand 2-(3-ethyl-pyrazin-2-yl)quinoline-4-carboxylate with N/O donor atoms enabled solvothermal synthesis of a 2D Cu(II) coordination polymer, {Cu(L)BF4}n (L = deprotonated 2-(3-ethyl-pyrazin-2-yl)quinoline-4-carboxylate). Both the ligand and its coordination polymer have been characterized. The condensed ring system of the applied [...] Read more.
Application of organic ligand 2-(3-ethyl-pyrazin-2-yl)quinoline-4-carboxylate with N/O donor atoms enabled solvothermal synthesis of a 2D Cu(II) coordination polymer, {Cu(L)BF4}n (L = deprotonated 2-(3-ethyl-pyrazin-2-yl)quinoline-4-carboxylate). Both the ligand and its coordination polymer have been characterized. The condensed ring system of the applied ligand promotes the formation of coordination polymers rather than mononuclear species. The obtained 2D coordination polymer is photoluminescent with bathochromic/hypsochromic shifts in ligand absorption bands leading to a single absorption band at 465 nm. Density Functional Theory was employed to provide a theoretical description of the possible conformational changes within the ligand, with emphasis on the difference between the ligand conformation in its hydrochloride salt and in the polymer. Two models of polymer fragments were constructed to describe the electronic structure and non-covalent interactions. The Quantum Theory of Atoms in Molecules (QTAIM) was applied for this purpose. Using the obtained results, we were able to develop potential energy profiles for various conformations of the ligand. For the set of the studied systems, we detected non-covalent interactions, which are responsible for the spatial conformation. Concerning the models of polymers, electron spin density distribution has been visualized and discussed. Full article
(This article belongs to the Special Issue Research Progress of Photoluminescent Materials)
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18 pages, 1917 KiB  
Article
Influence of Energetic Xe132 Ion Irradiation on Optical, Luminescent and Structural Properties of Ce-Doped Y3Al5O12 Single Crystals
by Ruslan Assylbayev, Gulnur Tursumbayeva, Guldar Baubekova, Zhakyp T. Karipbayev, Aleksei Krasnikov, Evgeni Shablonin, Gulnara M. Aralbayeva, Yevheniia Smortsova, Abdirash Akilbekov, Anatoli I. Popov and Aleksandr Lushchik
Crystals 2025, 15(8), 683; https://doi.org/10.3390/cryst15080683 - 27 Jul 2025
Viewed by 946
Abstract
The impact of 230-MeV Xe132 ion irradiation on the structural, optical, and luminescent properties of YAG:Ce single crystals is investigated over a fluence range of 1011–1014 ions/cm2. Optical absorption; cathodo-, X-ray, and photoluminescence; and X-ray diffraction are [...] Read more.
The impact of 230-MeV Xe132 ion irradiation on the structural, optical, and luminescent properties of YAG:Ce single crystals is investigated over a fluence range of 1011–1014 ions/cm2. Optical absorption; cathodo-, X-ray, and photoluminescence; and X-ray diffraction are employed to analyze radiation-induced changes. Irradiation leads to the formation of Frenkel (F, F+) and antisite defects and attenuates Ce3+ emission (via enhanced nonradiative processes and Ce3+ → Ce4+ recharging). A redistribution between the fast and slow components of the Ce3+-emission is considered. Excitation spectra show the suppression of exciton-related emission bands, as well as a shift of the excitation onset due to increased lattice disorder. XRD data confirm partial amorphization and a high level of local lattice disordering, both increasing with irradiation fluence. These findings provide insight into radiation-induced processes in YAG:Ce, which are relevant for its application in radiation–hard scintillation detectors. Full article
(This article belongs to the Special Issue Research Progress of Photoluminescent Materials)
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12 pages, 2213 KiB  
Article
Controllable Functionalization of Carbon Dots as Selective and Sensitive Fluorescent Probes for Sensing Cu(II) Ions
by Xiaochun Zheng, Hao Zhang, Haoming Jiang, Lei Sun, Yuanze Sun, Qingcao Liu, Shoutian Ren, Yunpeng Zhuang and Xiaofeng Gong
Crystals 2025, 15(3), 205; https://doi.org/10.3390/cryst15030205 - 21 Feb 2025
Cited by 1 | Viewed by 983
Abstract
Carbon dots (CDs) are efficient fluorescent probes for metal ion detection due to their high sensitivity, nontoxicity and stability, but their rich functional groups lead to simultaneous responses to multiple ions. So, how to realize highly selective detection for specific ions is still [...] Read more.
Carbon dots (CDs) are efficient fluorescent probes for metal ion detection due to their high sensitivity, nontoxicity and stability, but their rich functional groups lead to simultaneous responses to multiple ions. So, how to realize highly selective detection for specific ions is still a challenging task. In this work, “bare CDs” were synthesized using the electrochemical stripping method, followed by grafting with hydroxyl and carboxyl groups following the hydrothermal method with boric acid. Transmission electron microscopy, an X-ray diffractometer, Fourier transform infrared spectroscopy, UV–visible spectrophotometers and a fluorescence spectrometer were used to characterize their morphology, surface functional groups and optical properties, respectively. The modified CDs exhibit a high sensitivity of 65% and selectivity towards Cu2+. Meanwhile, they also exhibited a short response time of less than 1 min and a good stability in terms of pH and ionic strength. Full article
(This article belongs to the Special Issue Research Progress of Photoluminescent Materials)
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Review

Jump to: Research

35 pages, 4627 KiB  
Review
An Insight into Synthesis, Optical Properties, and Applications of Green Fluorescent Carbon Dots
by Sanjeev Kumar, Jyoti Gaur, Sandeep Kaushal, Jasvir Dalal, Mrinmoy Misra, Harpreet Kaur, Supreet Kaur, Navneet Kaur, Gautam Singh and Gurjinder Singh
Crystals 2025, 15(4), 320; https://doi.org/10.3390/cryst15040320 - 28 Mar 2025
Cited by 1 | Viewed by 1584
Abstract
In the ever-advancing field of nanotechnology and nanoscience, luminescent carbon dots, or carbon quantum dots, have emerged as one of the most up-and-coming carbon-based nanomaterials in recent years due to their diverse physicochemical properties, which include low toxicity, ease of synthesis, superior photostability, [...] Read more.
In the ever-advancing field of nanotechnology and nanoscience, luminescent carbon dots, or carbon quantum dots, have emerged as one of the most up-and-coming carbon-based nanomaterials in recent years due to their diverse physicochemical properties, which include low toxicity, ease of synthesis, superior photostability, excellent water solubility, high specific surface areas with ease of surface functionalization, and unique electronic and optical properties. They exhibit two-photon absorption and unique tunable fluorescence emission across a wide range of wavelengths, which can be precisely controlled by surface modifications and particle size. These characteristics have led to their widespread usage in a variety of applications, including optical/fluorescent sensing, electrochemical sensing, and energy-related fields, such as light-emitting diodes, photovoltaic supercapacitors, bioimaging, drug delivery, and antimicrobial research. Recently, focus has shifted to the green synthesis of carbon dots, with significant success achieved in this area, opening a plethora of opportunities in both basic and applied sciences. This review is a comprehensive study of milestones achieved in the area of green carbon dots. This review starts with the historical background of luminescent materials and how carbon dots/carbon quantum dots have been emerging as the stars among all luminescent nanomaterials. The challenges of conventional synthesis methods for nanoparticles are also discussed, with a detailed review of the various green synthesis processes reported to date. This section provides insights into widely accepted formation mechanisms and their influence on the shapes and sizes of CDs. In the next section, various physical properties of CDs are discussed, highlighting characteristics such as high quantum yield, photoluminescence stability, and chemical inertness, which make them exceptional nanomaterials. Last but not least, various CD-related challenges and future prospects are highlighted. Overall, this review provides details of recent developments in the area of green CDs. Full article
(This article belongs to the Special Issue Research Progress of Photoluminescent Materials)
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