Promising deep-red emitting Cr 3+ -doped SrAl 12 O 19 phosphors for plant growth LEDs.

Autor: Tam TTH; School of Information Technology and Digital Economics (SITDE), National Economics University (NEU), Hanoi, Vietnam., Quang NV; Department of Chemistry, Hanoi Pedagogical University 2, Phuc Yen, Vinh Phuc, Vietnam., Tu N; Faculty of Fundamental Sciences, Phenikaa University, Hanoi, Vietnam., Trung DQ; Faculty of Fundamental Sciences, Phenikaa University, Hanoi, Vietnam., Du NV; Faculty of Fundamental Sciences, Phenikaa University, Hanoi, Vietnam., Bach TN; Institute of Materials Science-Vietnam Academy of Science and Technology, Hanoi, Vietnam., Lien NTH; Institute of Physics-Vietnam Academy of Science and Technology, Hanoi, Vietnam., Duy Hung N; International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), Hanoi, Vietnam., Tien HL; Institute of Science and Technology, TNU-University of Sciences, Thai Nguyen, Vietnam., Tran MT; Faculty of Materials Science and Engineering, Phenikaa University, Hanoi, Vietnam., Huy PT; Faculty of Materials Science and Engineering, Phenikaa University, Hanoi, Vietnam.
Jazyk: angličtina
Zdroj: Luminescence : the journal of biological and chemical luminescence [Luminescence] 2024 Aug; Vol. 39 (8), pp. e4851.
DOI: 10.1002/bio.4851
Abstrakt: Recently, deep-red-emitting phosphors that can be excited by ultraviolet (UV) and near-ultraviolet (NUV) light have been extensively investigated for plant growth LED applications. However, due to the harmful effects of these high-energy rays on plants, violet- or blue-excited deep-red-emitting phosphors are considered a more appropriate solution. In this work, SrAl 12 O 19 :Cr 3+ phosphors were synthesized using a simple solid-state reaction, revealing a strikingly sharp deep-red emission band centered at 694 nm and effective excitation by violet light. The optimal SrAl 12 O 19 :1.0%Cr 3+ phosphor, annealed at 1500°C, exhibits an extended lifetime of 0.549 ms, an energy activation level of 0.239 eV, a good quantum efficiency (QE) of 36.2%, and superior color purity at 100%. Further, an LED prototype with a precise absorption spectrum for far-red phytochrome (P fr ) has been demonstrated. These results indicate that the synthesized SrAl 12 O 19 :1.0%Cr 3+ phosphors could be used as a promising deep-red-emitting phosphor for plant growth LED.
(© 2024 John Wiley & Sons Ltd.)
Databáze: MEDLINE
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