Warm white light emitting ThO₂:Sm³⁺ nanorods: Cationic surfactant assisted reverse micellar synthesis and Photoluminescence properties

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• 作者：Santosh K. Gupta ; Ruma Gupta ; V. Natarajan ; S.V. Godbole
• 关键词：A. Nanostructures ; B. Chemical synthesis ; B. Luminescence ; B. Optical properties ; C. Transmission electron microscopy
• 刊名：Materials Research Bulletin
• 出版年：January, 2014
• 年：2014
• 卷：49
• 期：Complete
• 页码：297-301
• 全文大小：1114 K

文摘

Sm³⁺ activated thorium oxide nanorods were synthesized by cationic surfactant assisted reverse micellar route. Phase purity, morphological and luminescent properties were investigated by X-ray diffraction, high resolution transmission electron microscopy and photoluminescence spectroscopy. Upon UV light excitation (245 nm), ThO₂:Sm³⁺ exhibited host emission at 447 nm, along with characteristic emission lines of Sm³⁺ at 569, 609, 662 and 716 nm. Lifetime spectroscopy shows the presence of two types of Sm³⁺ (蟿 = 1.1 ms and 4.9 ms) with different asymmetric ratios.