White up-conversion luminescence of NaYF sub(4):Yb super(3+),Pr super(3+),Er super(3+)

Photon up-conversion which yields higher energy emission by stacking lower energy photons is possible only with specific rare earth ions. Despite this, it has several potential applications. NaYF sub(4) with Yb super(3+),Er super(3+) co-doping has been recognized as one of the most feasible material...

Full description

Saved in:
Bibliographic Details
Published in:Optical materials 2014-08, Vol.36 (10), p.1627-1630
Main Authors: Holsae, Jorma, Laamanen, Taneli, Laihinen, Tero, Lastusaari, Mika, Pihlgren, Laura, Rodrigues, Lucas CV
Format: Article
Language:English
Subjects:
Emission
Luminescence
Photons
Quenching
Rare earth metals
Stacking
Upconversion
White light
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Photon up-conversion which yields higher energy emission by stacking lower energy photons is possible only with specific rare earth ions. Despite this, it has several potential applications. NaYF sub(4) with Yb super(3+),Er super(3+) co-doping has been recognized as one of the most feasible materials for efficient up-conversion luminescence. In this work, the up-conversion luminescence of the Pr super(3+)-Er super(3+) combination was studied using sensitization by Yb super(3+). Emission was observed in the visible including blue, green, yellow, orange and red. These are due to the super(3)P sub(0,1) arrow right super(3)H sub(4-6), super(3)F sub(2) sub(-) sub(4) and super(1)D sub(2) arrow right super(3)H sub(4) (Pr super(3+)) as well as super(2)H sub(11/2), super(4)S sub(3/2), super(4)F sub(9/2) arrow right super(4)I sub(15/2) (Er super(3+)) transitions. Concentration quenching of the Pr super(3+) luminescence was observed already with 1 mol-% due to many cross-relaxation processes. With naked eye, the up-conversion luminescence was seen as white light. The CIE chromaticity coordinates are close to those of the standard illuminant F4 which represents warm white.
ISSN:0925-3467
DOI:10.1016/j.optmat.2013.12.004