Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 889, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.161671
Keywords
Sm3+ ions; Down-conversion luminescence; Phosphor; Plant cultivation; Temperature sensing
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Funding
- Nano.Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2021M3H4A1A02057007]
- Pukyong National University [2017M3A9B8069470]
- National Research Foundation of Korea [4299990113858] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study investigated the properties of Sm3+-activated niobate double-perovskite orange-red emitting phosphors prepared by solid-state reaction, including their crystal structure, luminescent properties, thermal stability, and temperature sensing characteristics. The results showed that the phosphors have potential applications in lasers and LED devices.
Sm3+-activated niobate double-perovskite orange-red emitting Ca2LaNbO6 (CLNO) phosphors were prepared using a solid-state reaction at 1300 degrees C. The purity of the powder phase, crystal structure, morphology, elemental composition, luminescent properties, thermal stability, electroluminescence and temperature sensing properties of the phosphors were comprehensively analyzed. The photoluminescence spectrum obtained under excitation of 407 nm exhibited four intense emissions ascribed to the 4f-4f transitions of Sm3+ ions. The electroluminescence spectrum of an LED device fabricated using a commercial 395-nm LED chip and the optimal CLNO:5%Sm3+ phosphor overlapped with the absorption band of the P-R phytochrome state, indicating its potential for use in a plant growth lamp. Furthermore, the systematic variations in the intensity ratios of the two emission or excitation bands of Sm3+ with temperature suggested the potential of the synthesized sample for temperature sensing. (C) 2021 Elsevier B.V. All rights reserved.
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