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Organic and Inorganic Luminescent Materials, 2nd Edition
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Organic and Inorganic Luminescent Materials, 2nd Edition

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Photochemistry".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 2302

Special Issue Editor

Prof. Dr. Liang Zhou

E-Mail Website
Guest Editor
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
Interests: rare earth complexes; organic light-emitting diodes; carbon dots; luminescent mechanisms; energy transfer; carriers trapping
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Organic and inorganic luminescent materials have captured people’s attention all over the world due to their wide application scope (e.g., display, lighting, biological detection, and environmental monitoring). Meanwhile, basic investigations into organic and inorganic luminescent materials have been launched in recent years. For example, based on the development of organic luminescent materials, OLEDs have been successfully commercialized and honored as the most promising candidates for next-generation display and lighting technology due to their high image quality, auto-emission, flexibility, and other merits. Recently, carbon dots, perovskites, aggregation-induced emission (AIE)-type emitters, and thermally activated delayed fluorescence (TADF)-type emitters, as well as their applications, have been significantly developed.

In order to further showcase the latest advances in organic and inorganic luminescent materials, we have organized this Special Issue, entitled “Organic and Inorganic Luminescent Materials”, to collate recent advances in the field of organic and inorganic luminescent materials, including novel luminescent materials, luminescent devices, luminescent mechanisms, and other applications of organic and inorganic luminescent materials, as well as other relevant topics. This Special Issue welcomes the submission of original research, reviews, and perspective articles focused on topics including, but not limited to, the following aspects:

  1. Progress of organic and inorganic luminescent materials;
  2. Molecular design of organic and inorganic luminescent materials;
  3. Progress of the application of organic and inorganic luminescent materials;
  4. Luminescent mechanisms and processes of luminescent materials and devices.

Prof. Dr. Liang Zhou
Guest Editor

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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. Molecules is an international peer-reviewed open access semimonthly 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 2700 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

  • luminescent materials
  • molecular design
  • luminescent mechanisms and processes
  • luminescent devices
  • display
  • lighting
  • detection

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Related Special Issue

Published Papers (4 papers)

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Research

16 pages, 2471 KiB  
Article
Carbazolyl Electron Donor and Pyridinyl Electron Acceptor Containing Derivatives as Potential Host Materials for Green Organic Light-Emitting Diodes
by Raminta Beresneviciute, Anil Kumar, Dovydas Blazevicius, Sushanta Lenka, Song-Ting Hsieh, Ming-Feng Tsai, Gintare Krucaite, Daiva Tavgeniene, Jwo-Huei Jou and Saulius Grigalevicius
Molecules 2025, 30(9), 1911; https://doi.org/10.3390/molecules30091911 - 25 Apr 2025
Viewed by 154
Abstract
Here, we present two series of new electroactive compounds containing electron donors (carbazolyl) and electron acceptor (pyridinyl) fragments as potential host materials. The objective compounds 9-(2-ethylhexyl)-3,6-di [3-(methoxypyridin-3-yl)carbazol-9-yl]carbazoles RB71 and RB74 were synthesized by an Ullmann coupling reaction between the intermediate derivatives: 9-(2-ethylhexyl)-3,6-diiodocarbazole and [...] Read more.
Here, we present two series of new electroactive compounds containing electron donors (carbazolyl) and electron acceptor (pyridinyl) fragments as potential host materials. The objective compounds 9-(2-ethylhexyl)-3,6-di [3-(methoxypyridin-3-yl)carbazol-9-yl]carbazoles RB71 and RB74 were synthesized by an Ullmann coupling reaction between the intermediate derivatives: 9-(2-ethylhexyl)-3,6-diiodocarbazole and corresponding 3-(methoxypyridin-3-yl)-9H-carbazole. Other target derivatives, 9-alkyl-3-[N-(9-alkylcarbazol-3-yl)-N-(4-methylpyridin-2-yl)amino]carbazoles RB70 and RB75, were also prepared, according to the Ullmann reaction method, from 2-amino-4-methylpyridine and the corresponding 3-iodo-9-alkylcarbazole. Thermogravimetric analysis confirmed that the new derivatives are highly thermally stable compounds, with 5% weight loss in the temperature range of 349 °C to 488 °C. According to differential scanning calorimetry results, some amorphous materials exhibit very high glass transition temperatures exceeding 150 °C in some cases, which is a significant advantage for compounds with potential applications in organic light-emitting devices. The electroluminescent properties of devices utilizing the new hosts RB71 or RB70 with 5.0, 10.0, 15.0, and 20.0 wt.% concentrations of the dopant tris(2-phenylpyridine)iridium(III), Ir(ppy)3, were demonstrated. All the PhOLEDs emitted light at approximately 515 nm with CIE coordinates of (0.30, 0.61) due to Ir(ppy)3 emissions. The most efficient device with RB71 host demonstrated a maximum power efficacy of 8.0 lm/W, maximum current efficiency of 12.7 cd/A, and maximal external quantum efficiency of 5.4% with a relatively low turn-on voltage of 4.3 eV, as well as luminance exceeding 4000 cd/m2. Additionally, 15 wt.% Ir(ppy)3 emitter-based PhOLED with RB70 host outperformed the other devices by displaying a maximum power efficacy of 9.6 lm/W, maximum current efficiency of 16.0 cd/A, and maximal external quantum efficiency of 6.7% with a relatively low turn-on voltage of 3.7 eV, as well as luminance reaching 11,200 cd/m2. Some devices seem to exhibit higher efficiencies than those previously reported for OLEDs that utilize a 4,4′-bis(9-carbazolyl)-2,2′-biphenyl (CBP) host. Full article
(This article belongs to the Special Issue Organic and Inorganic Luminescent Materials, 2nd Edition)
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15 pages, 10576 KiB  
Article
Dy3+ and Mn4+ Ions Co-Doped Stannate Phosphors for Applications in Dual-Mode Optical Thermometry
by Zaifa Yang, Zhide Wang, Yi Su, Wenyue Zhang and Yu Zheng
Molecules 2025, 30(7), 1569; https://doi.org/10.3390/molecules30071569 - 31 Mar 2025
Viewed by 172
Abstract
In order to break through the limitations of the application of traditional temperature measurement technology, non-contact optical temperature sensing material with good sensitivity is one of the current research hotspots. Herein, a series of Dy3+ and Mn4+ co-doping Mg3Ga [...] Read more.
In order to break through the limitations of the application of traditional temperature measurement technology, non-contact optical temperature sensing material with good sensitivity is one of the current research hotspots. Herein, a series of Dy3+ and Mn4+ co-doping Mg3Ga2SnO8 fluorescent materials were prepared successfully, and the crystal structure, phase purity, and morphology of the synthesized phosphors were comprehensively investigated, as well as their photoluminescence properties, energy transfer, and high-temperature thermal stability. The two pairs of independent thermally coupled energy levels of Dy3+ ions and Mn4+ ions in Mg3Ga2SnO8 are utilized to realize the dual-mode optical temperature detection with excellent performance. On the one hand, based on the different ionic energy level transitions of 4F9/2→6H13/2 and 2Eg→4A2g responding differently to temperature, two emission bands of 577 nm and 668 nm were chosen to construct the fluorescence intensity ratio thermometry, and the maximum sensitivity of 1.82 %K−1 was achieved at 473 K. On the other hand, based on the strong temperature dependence of the lifetime of Mn4+ in Mg3Ga2SnO8:0.06Dy3+,0.009Mn4+, fluorescence lifetime thermometry was constructed and a maximum sensitivity of 2.75 %K−1 was achieved at 473 K. Finally, the Mg3Ga2SnO8: 0.06Dy3+,0.009Mn4+ sample realizes dual-mode optical temperature measurement with high sensitivity and a wide temperature detection range, indicating that the sample has promising applications in optical temperature measurement. Full article
(This article belongs to the Special Issue Organic and Inorganic Luminescent Materials, 2nd Edition)
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18 pages, 8484 KiB  
Article
Magnetic Hyperthermia Method Synthesis of Water-Soluble Silicon–Carbon Dots: Excitation-Independent Fluorescence Materials
by Bing-Yu Li, Chun-Yan She, Jun-Chao Deng, Wen-Ming Shu and Wei-Chu Yu
Molecules 2025, 30(6), 1222; https://doi.org/10.3390/molecules30061222 - 9 Mar 2025
Viewed by 1762
Abstract
Carbon dots (CDs) have attracted widespread attention in recent years due to their synthetic simplicity, biocompatibility, and unique photoluminescent behavior. In this work, water-soluble silicon–carbon dots (SiCDs) were synthesized, and their properties were evaluated. First, a series of SiCDs was prepared by using [...] Read more.
Carbon dots (CDs) have attracted widespread attention in recent years due to their synthetic simplicity, biocompatibility, and unique photoluminescent behavior. In this work, water-soluble silicon–carbon dots (SiCDs) were synthesized, and their properties were evaluated. First, a series of SiCDs was prepared by using a novel magnetic hyperthermia method from citric acid (CA) and 3-(2-aminoethylamino) propyldimethoxymethylsilane (AEAMPS). Then, based on the Stöber method, silica (SiO2) was loaded onto the SiCDs in a one-pot reaction to obtain SiCDs@SiO2 microspheres. This synthesis strategy is safe, efficient, and simple, allowing gram-scale production in a short time. The resulting SiCDs@SiO2 microspheres exhibited excellent fluorescent performance, along with high water solubility and independence of excitation fluorescence. The SiCDs@SiO2 microspheres possessed good thermal resistance and acid–base stability. The influence of storage time and different metal ions on the microsphere suspension was minimal. The SiCDs@SiO2 microspheres show potential applications for water detection in horizontal wells as fluorescent markers. Full article
(This article belongs to the Special Issue Organic and Inorganic Luminescent Materials, 2nd Edition)
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11 pages, 3710 KiB  
Article
Luminescence Efficiency Enhanced by Simple Substitutions on Donor and Acceptor in Radicals with Donor–Acceptor Structure
by Shuang Gao, Jiahao Guan, Lintao Zhang and Xin Ai
Molecules 2025, 30(6), 1191; https://doi.org/10.3390/molecules30061191 - 7 Mar 2025
Viewed by 528
Abstract
Simple substitutions on the donor or acceptor units in radicals is an effective method to improve luminescent properties. However, the luminescence efficiency of radicals has not yet reached satisfactory levels through simple molecular structure modification. In this study, two [4-(N-Carbazolyl)-2,6-dichlorophenyl] bis(2,4,6-trichlorophenyl)methyl (Cz-TTM) radical [...] Read more.
Simple substitutions on the donor or acceptor units in radicals is an effective method to improve luminescent properties. However, the luminescence efficiency of radicals has not yet reached satisfactory levels through simple molecular structure modification. In this study, two [4-(N-Carbazolyl)-2,6-dichlorophenyl] bis(2,4,6-trichlorophenyl)methyl (Cz-TTM) radical derivatives (Mes2Cz-TTM, Mes2Cz-Mes2TTM) were synthesized and characterized by modifying the carbazole (donor) and tris-2,4,6-trichlorophenylmethyl radical (acceptor) units with 2,4,6-trimethylphenyl groups. The different substitutions showed varying influences on photoluminescence quantum efficiency (PLQE) compared to the Cz-TTM parent radical. The donor-only substitution suppressed the PLQE (39%) in Mes2Cz-TTM. In contrast, Mes2Cz-Mes2TTM exhibited a significantly higher PLQE of 92.6%, compared to the 68% PLQE of the Cz-TTM parent radical in toluene. Additionally, thermostability and photostability were improved with both donor and acceptor substitutions. The photophysical properties, molecular orbitals, and electrochemical behaviors were also systematically explored. This strategy provides a feasible approach to achieve high luminescence efficiency in radicals through simple substitutions on donor and acceptor units. Full article
(This article belongs to the Special Issue Organic and Inorganic Luminescent Materials, 2nd Edition)
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