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Advanced Luminescent Materials: Synthesis, Properties and Applications
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Advanced Luminescent Materials: Synthesis, Properties and Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Optical and Photonic Materials".

Deadline for manuscript submissions: closed (20 June 2024) | Viewed by 5924

Special Issue Editors

Dr. Peng Tao

E-Mail Website
Guest Editor
Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China
Interests: advanced functional materials; luminescent transition-metal complexes; organic semiconductors; π-conjugated compounds; organic electronics
Special Issues, Collections and Topics in MDPI journals
Dr. Zejing Chen

E-Mail Website
Guest Editor
Jiangxi Key Laboratory of Nanobiomaterials, East China Jiaotong University, Nanchang 330013, China
Interests: advanced polymer materials; phosphorescent polymers; biomedical engineering; tumor therapy; biosensing and bioimaging

Special Issue Information

Dear Colleague, 

Recently, novel advanced luminescent materials, including triplet emitters (e.g., luminescent transition-metal complexes (LTMCs) and thermally activated delayed fluorescent (TADF) materials) and doublet emitters (e.g., organic radicals, rare-earth complexes), have played a crucial role in the development of advanced photofunctional materials. Owing to their diverse structural/molecular design, structural diversity, and rich photophysical properties, these luminescent materials have attracted extensive attention, and have been widely and wisely used in the fields of photocatalysis, electroluminescence, organic solar cells, biological sensing and imaging, photodynamic therapy, etc. Chemists can design and prepare a wide variety of photofunctional materials. Structural studies of these materials revealed the presence of novel photophysical phenomena, allowing a deeper understanding of the structure–property relationships and extending their potential applications. This Special Issue on “Advanced Luminescent Materials: Synthesis, Properties and Applications” should become a timely status report summarizing and showcasing the fundamental progresses and practical advancements in recent years.

Dr. Peng Tao
Dr. Zejing Chen
Guest Editors

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. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • luminescent transition-metal complex
  • thermally activated delayed fluorescent material
  • biosensing and bioimaging
  • phosphorescent polymers
  • rare-earth complexes
  • tumor therapy
  • organic radicals
  • electroluminescence, organic solar cells
  • stimuli-responsive materials

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Published Papers (4 papers)

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Research

14 pages, 3735 KiB  
Article
Encapsulation of InP/ZnS Quantum Dots into MOF-5 Matrices for Solid-State Luminescence: Ship in the Bottle and Bottle around the Ship Methodologies
by Alexis Tran, Rodolphe Valleix, François Réveret, Lawrence Frezet, Federico Cisnetti and Damien Boyer
Materials 2024, 17(13), 3155; https://doi.org/10.3390/ma17133155 - 27 Jun 2024
Cited by 3 | Viewed by 1233
Abstract
The utilization of InP-based quantum dots (QDs) as alternative luminescent nanoparticles to cadmium-based QDs is actively pursued. However, leveraging their luminescence for solid-state applications presents challenges due to the sensitivity of InP QDs to oxidation and aggregation-caused quenching. Hence, an appealing strategy is [...] Read more.
The utilization of InP-based quantum dots (QDs) as alternative luminescent nanoparticles to cadmium-based QDs is actively pursued. However, leveraging their luminescence for solid-state applications presents challenges due to the sensitivity of InP QDs to oxidation and aggregation-caused quenching. Hence, an appealing strategy is to protect and disperse InP QDs within hybrid materials. Metal–organic frameworks (MOFs) offer a promising solution as readily available crystalline porous materials. Among these, MOF-5 (composed of {Zn4O}6+ nodes and terephthalate struts) can be synthesized under mild conditions (at room temperature and basic pH), making it compatible with InP QDs. In the present work, luminescent InP/ZnS QDs are successfully incorporated within MOF-5 by two distinct methods. In the bottle around the ship (BAS) approach, the MOF was synthesized around the QDs. Alternatively, in the ship in the bottle (SIB) strategy, the QDs were embedded via capillarity into a specially engineered, more porous variant of MOF-5. Comparative analysis of the BAS and SIB approaches, evaluating factors such as operational simplicity, photoluminescence properties, and the resistance of the final materials to leaching were carried out. This comparative study provides insights into the efficacy of these strategies for the integration of InP/ZnS QDs within MOF-5 for potential solid-state applications in materials chemistry. Full article
(This article belongs to the Special Issue Advanced Luminescent Materials: Synthesis, Properties and Applications)
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26 pages, 10958 KiB  
Article
Micro-Inclusion Engineering via Sc Incompatibility for Luminescence and Photoconversion Control in Ce3+-Doped Tb3Al5−xScxO12 Garnet
by Karol Bartosiewicz, Robert Tomala, Damian Szymański, Benedetta Albini, Justyna Zeler, Masao Yoshino, Takahiko Horiai, Paweł Socha, Shunsuke Kurosawa, Kei Kamada, Pietro Galinetto, Eugeniusz Zych and Akira Yoshikawa
Materials 2024, 17(11), 2762; https://doi.org/10.3390/ma17112762 - 5 Jun 2024
Cited by 2 | Viewed by 1327
Abstract
Aluminum garnets display exceptional adaptability in incorporating mismatching elements, thereby facilitating the synthesis of novel materials with tailored properties. This study explored Ce3+-doped Tb3Al5−xScxO12 crystals (where x ranges from 0.5 to 3.0), revealing a [...] Read more.
Aluminum garnets display exceptional adaptability in incorporating mismatching elements, thereby facilitating the synthesis of novel materials with tailored properties. This study explored Ce3+-doped Tb3Al5−xScxO12 crystals (where x ranges from 0.5 to 3.0), revealing a novel approach to control luminescence and photoconversion through atomic size mismatch engineering. Raman spectroscopy confirmed the coexistence of garnet and perovskite phases, with Sc substitution significantly influencing the garnet lattice and induced A1g mode softening up to Sc concentration x = 2.0. The Sc atoms controlled sub-eutectic inclusion formation, creating efficient light scattering centers and unveiling a compositional threshold for octahedral site saturation. This modulation enabled the control of energy transfer dynamics between Ce3+ and Tb3+ ions, enhancing luminescence and mitigating quenching. The Sc admixing process regulated luminous efficacy (LE), color rendering index (CRI), and correlated color temperature (CCT), with adjustments in CRI from 68 to 84 and CCT from 3545 K to 12,958 K. The Ce3+-doped Tb3Al5−xScxO12 crystal (where x = 2.0) achieved the highest LE of 114.6 lm/W and emitted light at a CCT of 4942 K, similar to daylight white. This approach enables the design and development of functional materials with tailored optical properties applicable to lighting technology, persistent phosphors, scintillators, and storage phosphors. Full article
(This article belongs to the Special Issue Advanced Luminescent Materials: Synthesis, Properties and Applications)
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12 pages, 7962 KiB  
Article
Fixed Yellow-to-Blue Intensity Ratio of Dy3+ in KY(CO3)2 Host for Emission Color Tuning
by Lei Huang, Jian Qian, Shijian Sun and Dechuan Li
Materials 2024, 17(6), 1438; https://doi.org/10.3390/ma17061438 - 21 Mar 2024
Cited by 1 | Viewed by 1103
Abstract
Dy3+, Ce3+ co-doped KY(CO3)2 phosphors with a monoclinic structure were synthesized using the hydrothermal method to create a fixed yellow-to-blue ratio emission. The [YO8] polyhedron, consisting of a Y atom and eight oxygen atoms, forms [...] Read more.
Dy3+, Ce3+ co-doped KY(CO3)2 phosphors with a monoclinic structure were synthesized using the hydrothermal method to create a fixed yellow-to-blue ratio emission. The [YO8] polyhedron, consisting of a Y atom and eight oxygen atoms, forms a relatively independent microstructure within the KY(CO3)2 host. Y3+ ions are partially replaced by Ce3+ or Dy3+ ions to construct the [CeO8] or [DyO8] polyhedral fluorescence emission unit. The spectral measurements indicate that Ce3+ and Dy3+ can maintain relatively independent fluorescence emission characteristics in the KY(CO3)2 host. The yellow-to-blue intensity ratio of Dy3+ remains close to 1 and does not change with the variation in the doping concentration of KY(CO3)2:Dy3+ and KY(CO3)2:Dy3+,Ce3+ phosphors. When Ce3+ and Dy3+ are co-doped with KY(CO3)2, the emission intensities of Dy3+ under 339 nm and 365 nm excitation increase by 8.43 and 2.32 times, respectively, through resonance energy transfer and cross-relaxation. All Ce3+-doped KY(CO3)2:Dy3+ phosphors can emit white light. Among them, the emitted light of KY(CO3)2:3%Dy3+,5%Ce3+ is closest to standard daylight. Therefore, a stable [YO8] polyhedral structure can be used to achieve more color tuning of light. Full article
(This article belongs to the Special Issue Advanced Luminescent Materials: Synthesis, Properties and Applications)
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Figure 1

17 pages, 7958 KiB  
Article
Luminescence Properties of an Orthorhombic KLaF4 Phosphor Doped with Pr3+ Ions under Vacuum Ultraviolet and Visible Excitation
by Patrycja Zdeb, Nadiia Rebrova, Radosław Lisiecki and Przemysław Jacek Dereń
Materials 2024, 17(6), 1410; https://doi.org/10.3390/ma17061410 - 19 Mar 2024
Cited by 4 | Viewed by 1699
Abstract
Fluorides have a wide bandgap and therefore, when doped with the appropriate ions, exhibit emissions in the ultraviolet C (UVC) region. Some of them can emit two photons in the visible region for one excitation photon, having a quantum efficiency greater than 100%. [...] Read more.
Fluorides have a wide bandgap and therefore, when doped with the appropriate ions, exhibit emissions in the ultraviolet C (UVC) region. Some of them can emit two photons in the visible region for one excitation photon, having a quantum efficiency greater than 100%. In a novel exploration, praseodymium (Pr3+) ions were introduced into KLaF4 crystals for the first time. The samples were obtained according to a high-temperature solid-state reaction. They exhibited an orthorhombic crystal structure, which has not been observed for this lattice yet. The optical properties of the material were investigated in the ultraviolet (UV) and visible ranges. The spectroscopic results were used to analyze the Pr3+ electronic-level structure, including the 4f5d configuration. It has been found that KLaF4:Pr3+ crystals exhibit intense luminescence in the UVC range, corresponding to multiple 4f → 4f transitions. Additionally, under vacuum ultraviolet (VUV) excitation, distinct transitions, specifically 1S0 → 1I6 and 3P0 → 3H4, were observed, which signifies the occurrence of photon cascade emission (PCE). The thermal behavior of the luminescence and the thermometric performance of the material were also analyzed. This study not only sheds light on the optical behavior of Pr3+ ions within a KLaF4 lattice but also highlights its potential for efficient photon management and quantum-based technologies. Full article
(This article belongs to the Special Issue Advanced Luminescent Materials: Synthesis, Properties and Applications)
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