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New Orange-red Emitting Phosphor La3NbO7:Eu 3+ Under Blue Excitation

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dc.contributor.author Francis, L T
dc.contributor.author Prabhakar Rao, P
dc.contributor.author Mariyam Thomas
dc.contributor.author Mahesh, S K
dc.contributor.author Reshmi, V R
dc.contributor.author Thampi, V D S
dc.date.accessioned 2016-07-28T09:42:34Z
dc.date.available 2016-07-28T09:42:34Z
dc.date.issued 2012-05-11
dc.identifier.citation Materials Letters 81:142-144 en_US
dc.identifier.uri http://hdl.handle.net/123456789/2370
dc.description.abstract A new orange-red emitting phosphor La3−xNbO7:xEu 3+ (x=0.05, 0.10, 0.15, 0.20) was prepared by a solidstate reaction route. Studies revealed the incorporation of Eu 3+ into two differently coordinated La 3+ sites, thereby favoring the multiband emission. Absorbance, photoluminescence excitation, emission and concentration dependence of Eu 3+ luminescence were investigated. The results indicate that the host exhibited high absorption in the UV region which enabled effective energy transfer from NbO6 7− groups to Eu 3+ excitation levels. Intense orange red emissions were observed under near UV (394 nm) and blue (464 nm) excitations nicely matching with the output wavelengths of UV and blue LED chips. The emission intensity of the phosphor under blue excitation is nearly twice that of the phosphor under near UV irradiation. Thus the intense orange red emitting host sensitized phosphor could be a promising phosphor candidate in generating white light combined with the blue chip. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Luminescence en_US
dc.subject Phosphors en_US
dc.subject Optical materials and properties en_US
dc.title New Orange-red Emitting Phosphor La3NbO7:Eu 3+ Under Blue Excitation en_US
dc.type Article en_US
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