Ultraviolet and violet upconversion luminescence in Ho3+-doped Y2O3 ceramic induced by 532-nm CW laser

Feng Qin, Yangdong Zheng, Ying Yu, Zhemin Cheng, Pouran Sadat Tayebi, Wenwu Cao, Zhiguo Zhang

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

Ultraviolet and violet upconversion luminescence spectra of holmium-doped Y2O3 were produced under the excitation of a compact continues-wave 532 nm solid-state laser. Emissions around 306, 362, 412, 390 and 428 nm can be assigned to the transitions of 3D35IJ (J = 8, 7, 6), 5G45I8 and 5G55I8, respectively. Power dependence and upconversion dynamics analysis demonstrated that both the energy transfer upconversion (ETU) and the excited state absorption (ESA) processes were involved in the population of 3D3 state via the coupled intermediate states 5S2/5F4. Fluorescence spectra in the visible and infrared ranges showed that 5G4 and 5G5 states were populated by the ESA process from 5I6 and 5I7 states, respectively, while the 5I6 and 5I7 states were radiatively populated from the excited 5S2/ 5F4 states. Upconversion mechanisms have been evaluated based on a rate equation model.

Original languageEnglish (US)
Pages (from-to)1115-1118
Number of pages4
JournalJournal of Alloys and Compounds
Volume509
Issue number4
DOIs
StatePublished - Jan 28 2011

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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