Resonant energy transfer and cross relaxation between Sm3+ ions in LiYF4 crystals

Mitsuo Yamaga, Hideaki Uno, Shin-ichiro Tsuda, Jon-Paul R. Wells, Thomas P. J. Han

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Luminescence decay curves of Sm3+ ions in LiVF4 crystals doped with 1.5 and 10 mol% Sm3+ are multi-exponential, whereas that in a LiYF4 crystal doped with 0.1 mol% Sm3+ is well approximated by a single exponential function with a decay time of 4.8 ms. The average luminescence decay times decrease from 4.8 to 0.60 ms with the increasing Sm3+ concentrations between 1 and 10 mol%. The decay curves for all crystals are found to be almost independent of the temperature between 15 and 300 K. The decrease of the decay times for the higher Sm3+ concentrations indicates energy transfer between two Sm3+ ions. Taking the crystal structure of LiYF4 into account, it is deduced that a single-step energy transfer process for the 1 and 5 mol% Sm3+ concentrations occurs from a Sm3+ ion at the origin of (0 0 0) to one of the Sm3+ ions substituting for the first nearest neighbor Y3+ sites and beyond within a sphere with an approximate radius of less than 0.7 nm. On the other hand, a multi-step energy transfer process dominates for the highest concentration (10 mol%) because the calculated average distance between two Sm3+ ions in the 10 mol% Sm3+ sample is comparable with the migration length of the single-step energy transfer process estimated from the 1 and 5 mol% Sm3+ samples.

LanguageEnglish
Pages1608-1617
Number of pages10
JournalJournal of Luminescence
Volume132
Issue number6
DOIs
Publication statusPublished - Jun 2012

Fingerprint

cross relaxation
Energy Transfer
Energy transfer
energy transfer
Ions
Crystals
decay
crystals
ions
Luminescence
doped crystals
luminescence
Exponential functions
exponential functions
curves
Crystal structure
crystal structure
Temperature
radii

Keywords

  • samarium
  • LiYF4
  • luminescence
  • energy transfer
  • cross relaxation

Cite this

Yamaga, Mitsuo ; Uno, Hideaki ; Tsuda, Shin-ichiro ; Wells, Jon-Paul R. ; Han, Thomas P. J. / Resonant energy transfer and cross relaxation between Sm3+ ions in LiYF4 crystals. In: Journal of Luminescence. 2012 ; Vol. 132, No. 6. pp. 1608-1617.
@article{5d419061bded4565a1d9db158365fc7a,
title = "Resonant energy transfer and cross relaxation between Sm3+ ions in LiYF4 crystals",
abstract = "Luminescence decay curves of Sm3+ ions in LiVF4 crystals doped with 1.5 and 10 mol{\%} Sm3+ are multi-exponential, whereas that in a LiYF4 crystal doped with 0.1 mol{\%} Sm3+ is well approximated by a single exponential function with a decay time of 4.8 ms. The average luminescence decay times decrease from 4.8 to 0.60 ms with the increasing Sm3+ concentrations between 1 and 10 mol{\%}. The decay curves for all crystals are found to be almost independent of the temperature between 15 and 300 K. The decrease of the decay times for the higher Sm3+ concentrations indicates energy transfer between two Sm3+ ions. Taking the crystal structure of LiYF4 into account, it is deduced that a single-step energy transfer process for the 1 and 5 mol{\%} Sm3+ concentrations occurs from a Sm3+ ion at the origin of (0 0 0) to one of the Sm3+ ions substituting for the first nearest neighbor Y3+ sites and beyond within a sphere with an approximate radius of less than 0.7 nm. On the other hand, a multi-step energy transfer process dominates for the highest concentration (10 mol{\%}) because the calculated average distance between two Sm3+ ions in the 10 mol{\%} Sm3+ sample is comparable with the migration length of the single-step energy transfer process estimated from the 1 and 5 mol{\%} Sm3+ samples.",
keywords = "samarium, LiYF4, luminescence, energy transfer, cross relaxation",
author = "Mitsuo Yamaga and Hideaki Uno and Shin-ichiro Tsuda and Wells, {Jon-Paul R.} and Han, {Thomas P. J.}",
year = "2012",
month = "6",
doi = "10.1016/j.jlumin.2012.01.028",
language = "English",
volume = "132",
pages = "1608--1617",
journal = "Journal of Luminescence",
issn = "0022-2313",
number = "6",

}

Resonant energy transfer and cross relaxation between Sm3+ ions in LiYF4 crystals. / Yamaga, Mitsuo; Uno, Hideaki; Tsuda, Shin-ichiro; Wells, Jon-Paul R.; Han, Thomas P. J.

In: Journal of Luminescence, Vol. 132, No. 6, 06.2012, p. 1608-1617.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Resonant energy transfer and cross relaxation between Sm3+ ions in LiYF4 crystals

AU - Yamaga, Mitsuo

AU - Uno, Hideaki

AU - Tsuda, Shin-ichiro

AU - Wells, Jon-Paul R.

AU - Han, Thomas P. J.

PY - 2012/6

Y1 - 2012/6

N2 - Luminescence decay curves of Sm3+ ions in LiVF4 crystals doped with 1.5 and 10 mol% Sm3+ are multi-exponential, whereas that in a LiYF4 crystal doped with 0.1 mol% Sm3+ is well approximated by a single exponential function with a decay time of 4.8 ms. The average luminescence decay times decrease from 4.8 to 0.60 ms with the increasing Sm3+ concentrations between 1 and 10 mol%. The decay curves for all crystals are found to be almost independent of the temperature between 15 and 300 K. The decrease of the decay times for the higher Sm3+ concentrations indicates energy transfer between two Sm3+ ions. Taking the crystal structure of LiYF4 into account, it is deduced that a single-step energy transfer process for the 1 and 5 mol% Sm3+ concentrations occurs from a Sm3+ ion at the origin of (0 0 0) to one of the Sm3+ ions substituting for the first nearest neighbor Y3+ sites and beyond within a sphere with an approximate radius of less than 0.7 nm. On the other hand, a multi-step energy transfer process dominates for the highest concentration (10 mol%) because the calculated average distance between two Sm3+ ions in the 10 mol% Sm3+ sample is comparable with the migration length of the single-step energy transfer process estimated from the 1 and 5 mol% Sm3+ samples.

AB - Luminescence decay curves of Sm3+ ions in LiVF4 crystals doped with 1.5 and 10 mol% Sm3+ are multi-exponential, whereas that in a LiYF4 crystal doped with 0.1 mol% Sm3+ is well approximated by a single exponential function with a decay time of 4.8 ms. The average luminescence decay times decrease from 4.8 to 0.60 ms with the increasing Sm3+ concentrations between 1 and 10 mol%. The decay curves for all crystals are found to be almost independent of the temperature between 15 and 300 K. The decrease of the decay times for the higher Sm3+ concentrations indicates energy transfer between two Sm3+ ions. Taking the crystal structure of LiYF4 into account, it is deduced that a single-step energy transfer process for the 1 and 5 mol% Sm3+ concentrations occurs from a Sm3+ ion at the origin of (0 0 0) to one of the Sm3+ ions substituting for the first nearest neighbor Y3+ sites and beyond within a sphere with an approximate radius of less than 0.7 nm. On the other hand, a multi-step energy transfer process dominates for the highest concentration (10 mol%) because the calculated average distance between two Sm3+ ions in the 10 mol% Sm3+ sample is comparable with the migration length of the single-step energy transfer process estimated from the 1 and 5 mol% Sm3+ samples.

KW - samarium

KW - LiYF4

KW - luminescence

KW - energy transfer

KW - cross relaxation

UR - http://www.scopus.com/inward/record.url?scp=84858001006&partnerID=8YFLogxK

U2 - 10.1016/j.jlumin.2012.01.028

DO - 10.1016/j.jlumin.2012.01.028

M3 - Article

VL - 132

SP - 1608

EP - 1617

JO - Journal of Luminescence

T2 - Journal of Luminescence

JF - Journal of Luminescence

SN - 0022-2313

IS - 6

ER -