Simultaneous observation of up/down conversion photoluminescence and colossal permittivity properties in (Er+Nb) co-doped TiO2materials

Mei Yan Tse, Ming Kiu Tsang, Yuen Ting Wong, Yi Lok Chan, Jianhua Hao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)


We have investigated the optical and dielectric properties of rutile TiO2doped with Nb and Er, i.e., (Er0.5Nb0.5)xTi1-xO2. The up/downconversion photoluminescence was observed in the visible and near-infrared region from the materials under 980 nm laser diode excitation. The upconversion emissions are attributed to the energy transfer between Er ions in the excited states. Moreover, the dielectric measurements indicate that the fabricated materials simultaneously present colossal permittivity properties with relatively low dielectric loss. Our work demonstrates the coexistence of both interesting luminescence and attractive dielectric characteristics in (Er+Nb) co-doped TiO2, showing the potential for multifunctional applications.
Original languageEnglish
Article number042903
JournalApplied Physics Letters
Issue number4
Publication statusPublished - 25 Jul 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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