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Spassky D, Vasil’ev A, Nagirnyi V, Kudryavtseva I, Deyneko D, Nikiforov I, Kondratyev I, Zadneprovski B. Bright UV-C Phosphors with Excellent Thermal Stability-Y 1-xSc xPO 4 Solid Solutions. Materials (Basel) 2022; 15:6844. [PMID: 36234185 PMCID: PMC9571669 DOI: 10.3390/ma15196844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/23/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
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 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.
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Affiliation(s)
- Dmitry Spassky
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskiye Gory 1-2, 119991 Moscow, Russia
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411 Tartu, Estonia
| | - Andrey Vasil’ev
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskiye Gory 1-2, 119991 Moscow, Russia
| | - Vitali Nagirnyi
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411 Tartu, Estonia
| | - Irina Kudryavtseva
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411 Tartu, Estonia
| | - Dina Deyneko
- Department of Chemistry, Lomonosov Moscow State University, Leninskiye Gory 1-3, 119991 Moscow, Russia
- Laboratory of Arctic Mineralogy and Material Sciences, Kola Science Centre, Russian Academy of Sciences, 14 Fersman Street, 184209 Apatity, Russia
| | - Ivan Nikiforov
- Department of Chemistry, Lomonosov Moscow State University, Leninskiye Gory 1-3, 119991 Moscow, Russia
| | - Ildar Kondratyev
- Physics Department, Lomonosov Moscow State University, Leninskiye Gory 1-2, 119991 Moscow, Russia
| | - Boris Zadneprovski
- All-Russian Research Institute for Synthesis of Materials, Institutskaya Street 1, 601600 Alexandrov, Russia
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Lin Q, Wang Q, Liao M, Xiong M, Feng X, Zhang X, Dong H, Zhu D, Wu F, Mu Z. Trivalent Chromium Ions Doped Fluorides with Both Broad Emission Bandwidth and Excellent Luminescence Thermal Stability. ACS Appl Mater Interfaces 2021; 13:18274-18282. [PMID: 33830728 DOI: 10.1021/acsami.1c01417] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Recently, trivalent chromium ion doped phosphors have exhibited significant application potential in broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs). However, developing an NIR phosphor with both broad emission bandwidth and excellent luminescence thermal stability is still a great challenge. Here, we demonstrate an NIR phosphor, ScF3:Cr3+, which can fulfill both conditions simultaneously. The prepared phosphors show broadband emission in the range of 700 to 1100 nm, with a full width at half-maximum (FWHM) of 140 nm peaking at 853 nm. These phosphors also demonstrate an excellent luminescence thermal stability (the emission intensity of ScF3:Cr3+ keeps 85.5% at 150 °C compared with the value at room temperature). An NIR pc-LED based on blue LED chips was fabricated and tested. The results show that the NIR pc-LED can yield strong broadband NIR emission. This work not only provides a promising phosphor for the application of NIR pc-LEDs but also has important guiding significance for effect of synthesis conditions on the luminescence properties of Cr3+-doped fluorides.
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Affiliation(s)
- Qiuming Lin
- School of Materials and Energy, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
- Experimental Teaching Department, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
| | - Qiang Wang
- School of Materials and Energy, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
- Experimental Teaching Department, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
| | - Min Liao
- School of Materials and Energy, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
- Experimental Teaching Department, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
| | - Mingxiang Xiong
- School of Materials and Energy, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
- Experimental Teaching Department, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
| | - Xing Feng
- School of Materials and Energy, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
| | - Xin Zhang
- School of Physics & Optoelectronic Engineering, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, People's Republic of China
| | - Huafeng Dong
- School of Physics & Optoelectronic Engineering, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, People's Republic of China
| | - Daoyun Zhu
- Experimental Teaching Department, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
| | - Fugen Wu
- School of Materials and Energy, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
| | - Zhongfei Mu
- Experimental Teaching Department, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, PR China
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