Near-infrared luminescence and energy transfer studies of LaOBr:Nd3+/Yb3+

Opt Express. 2012 Sep 10:20 Suppl 5:A722-8. doi: 10.1364/OE.20.00A722.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't