title: Optical spectroscopy of Eu3+ ions in tetragonal ZrO2 nanocrystals.
abstract: A facile solvothermal method was introduced to incorporate Eu3+ ions into the monodisperse tetragonal ZrO2 nanocrystals (NCs) with small size of approximately 4 nm. The optical properties for Eu3+ doped ZrO2 NCs were investigated in detail by using the photoluminescence (PL) spectroscopy at room and low temperatures. Intense red emissions from Eu3+ ions could be achieved via the host sensitization, which was found to be much more efficient than the direct excitation of lanthanide ions. Moreover, multiple sites of Eu3+ as well as the host-to-Eu3+ energy transfer were also revealed based on the PL analyses.
authors.affiliation: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
authors.forename: Hai
authors.initials: H
authors.lastname: Tang
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Liu
authors.forename: Wenqin
authors.initials: W
authors.lastname: Luo
authors.forename: Renfu
authors.initials: R
authors.lastname: Li
authors.forename: Xueyuan
authors.initials: X
authors.lastname: Chen