Open AccessNear-infrared luminescence and energy transfer studies of LaOBr:Nd^3+/Yb^3+
Author(s) -
Zhiguo Xia,
Yi Luo,
Ming Guan,
Libing Liao
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.00a722
Subject(s) - luminescence , materials science , absorption (acoustics) , infrared , optics , photon , quantum efficiency , energy transfer , ytterbium , excitation , atomic physics , optoelectronics , analytical chemistry (journal) , physics , chemistry , doping , quantum mechanics , chromatography
LaOBr:Nd(3+)/Yb(3+) has been prepared via a high temperature solid-state method, and near-infrared (NIR) quantum cutting (QC) luminescence in this system has been demonstrated. NIR luminescence of LaOBr:Nd(3+)/Yb(3+) has been investigated by excitation, emission spectra and lifetime measurements, respectively. After absorption of a single 363 nm photon, down-conversion (DC) occurs from the Nd(3+) 4G(9/2) level via the cross-relaxation process Nd(3+) (4G(9/2)→4F(3/2)), Yb(3+) (2F(7/2)→2F(5/2)), followed by a second energy transfer step from Nd(3+) (4F(3/2)level) to Yb(3+) (2F(5/2)level), leading to the emission of two IR photons from Yb(3+), which is a promising avenue to boost the efficiency of solar cells with a twofold increase in the photon number.