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Spectral change and far-red emission of Mn^(2+)ions co-doped NaSrB_(5)O_(9):Dy^(3+)luminescence material for plant growth LEDs

查看全文 作　　者：[1]K.Munirathnam;Koduru [2,3]Mallikarjuna;[4]R.Vijaya;[5]P.C.Nagajyothi;K.Ramakrishna [6]Reddy;[6]M.Srinivas 高影响力作者 机构地区：[1]Department of Physics,School of Applied Sciences,REVA University,Bengaluru,560064,India;[2]Department for Management of Science and Technology Development,Ton Due Thang University,Ho Chi Minh City,Vietnam;[3]Faculty of Applied Sciences,Ton Due Thang University,Ho Chi Minh City,Vietnam;[4]Department of Physics,Visvodaya Government Degree College,Venkatagiri,524132,India;[5]School of Mechanical Engineering,Yeungnam University,Gyeongsan,33541,South Korea;[6]Department of Chemistry,School of Applied Sciences,REVA University,Bengaluru,560064,India高影响力机构 出　　处：《Journal of Rare Earths》索引2022年第40卷第2期,共9页高影响力期刊 基　　金：Project supported by the National Research Foundation of Korea funded by the Korean government(MSIP-2018R1A2B6006056)。 摘　　要：Due to the characteristic emission of phosphors,phosphor-converted LEDs have been employed to provide the requisite light sources for indoor plant growth in the optical agricultural industry.Herein,we prepared a series of Mn^(2+)co-doped NaSrB5 O9:Dy^(3+)phosphors via a solid-state reaction method.These phosphors have significant three-band emissions at 467 nm(blue region),606 nm(orange region),and765 nm(far-red region),ascribed to the^(4)F_(9/2)-^(6)H_(15/2)and 4 F9/2-6 H13/2 transitions of the Dy^(3+)ions and the^(4)T_(1g)(G)-^(6)A_(1g)(S)spin-forbidden transition of the Mn^(2+)ions,respectively,when excited by light of 376 nm(near-UV region).The co-dopant in the host material facilitates tunable photoluminescence(PL)due to energy transfer from the Dy^(3+)ions to the Mn^(2+)ions.The three emission peaks from the prepared phosphors well match with the absorption spectra of the photosynthesis pigments of plants,chlorophyll and phytochrome,which can absorb blue(400-500 nm),orange-red(550-700 nm),and infrared(IR)radiation,indicating that these phosphors have potential applications in the fabrication of plant-growth LEDs.Prior to the PL studies,the structure of the phosphors was determined by X-ray diffraction,refined by Rietveld method and chemically quantified by X-ray photoelectron spectroscopy. 关 键 词：PHOSPHORS REFINEMENT X-ray photoelectron spectroscopy Energy transfer Plant growth LEDs Rare earths
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