Dual-functional of non-contact thermometry and field emission displays via efficient Bi3+ → Eu3+ energy transfer in emitting-color tunable GdNbO4 phosphors

By Junpeng Xue, H. Noh, B. Choi, Sung Heum Park, Jung Hwan Kim, J. Jeong, Peng Du. 2020

252 citations recorded by the source corpus.

Abstract Using solid-state reaction technique, we prepared a series of Bi3+/Eu3+-activated GdNbO4 phosphors. Under 308 nm excitation, the energy transfer from Bi3+ to Eu3+ ions, which belonged to the dipole-quadrupole interaction mechanism, allowed the GdNbO4:Bi3+,Eu3+ compounds to display tunable multi-color emissions. The temperature dependent photoluminescence emission and water resistance behaviors of the obtained samples were investigated in detail. Taking full advantage of the diverse thermal quenching performance between Bi3+ and Eu3+ ions along with their distinct characteristic color emission, we designed a highly sensitive non-invasion optical thermometer. The maximum absolute and relative sensor sensitivities of the final compounds were about 0.0367 K−1 and 3.81% K−1, respectively. Moreover, the as-prepared phosphors exhibited excellent cathode-luminescence properties. These above characteristics indicated that Bi3+/Eu3+-activated GdNbO4 phosphors can be used as potential luminescent materials for non-contact temperature measurement and field emission display.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/2e63e3c6f8f15a688c20cf67978297670e9027db