Organic mediated synthesis of highly luminescent Li+ ion compensated Gd2O3:Eu3+ nanophosphors and their Judd-Ofelt analysis

R. G.Abhilash Kumar, Satoshi Hata, Ken Ichi Ikeda, K. G. Gopchandran

研究成果: Contribution to journalArticle査読

40 被引用数 (Scopus)

抄録

Highly luminescent red emitting Gd2O3:Eu3+, Li+ nanophosphor has been synthesized by the solvothermal combustion of the metal-citrate complex in diethylene glycol medium. The morphology and luminescence properties of these nanophosphors are found to be highly sensitive to the extent of lithium ion compensation. It is found that lithium ions promote grain growth and alter the morphology of the Gd2O3:Eu3+ nanophosphor from nearly spherical to cobblestone like. A significant enhancement in intensity of luminescence and quantum efficiency is observed in lithium compensated nanophosphors. The highest emission intensity is observed for the Gd1.75Eu0.1Li0.15O3 nanophosphor, about 1.83 times that of Gd1.9Eu0.1O3 and is attributed to the enhanced intra 4f-4f emission transitions arising from the modifications of the crystal field and distortion of the local symmetry around the europium ions. The luminescence decay profiles are found to be single exponential in nature and the lifetime measured was 1.36 ms for the Gd1.75Eu0.1Li0.15O3 nanophosphor. The chromaticity coordinates of these nanophosphors indicated high colour purity. Judd-Ofelt intensity parameters indicated that lithium compensation increases the polarization of the local environment and an increase of covalency and asymmetry around the europium ions.

本文言語英語
ページ(範囲)67295-67307
ページ数13
ジャーナルRSC Advances
6
71
DOI
出版ステータス出版済み - 2016

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 化学工学(全般)

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