Enhanced multiphoton ultraviolet and blue upconversion emissions in Y 2O3: Er3+ nanocrystals by codoping with Li+ ions

G. Y. Chen; H. C. Liu; H. J. Liang; G. Somesfalean; Z. G. Zhang

doi:10.1016/j.ssc.2008.08.001

Enhanced multiphoton ultraviolet and blue upconversion emissions in Y ₂O₃: Er³⁺ nanocrystals by codoping with Li⁺ ions

G. Y. Chen
, H. C. Liu
, H. J. Liang
, G. Somesfalean
, Z. G. Zhang^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Ultraviolet (UV) and blue upconversion (UC) radiations with large and anomalous enhancement were observed in Y ₂O₃:Er³⁺ nanocrystals under laser excitation of 970 nm. Three-photon UV and blue UC radiations were enhanced by about 60 times via codoping with Li⁺ ions, in remarked contrast to the 45 times enhancement for two-photon green UC radiation. The integrated intensity of enhanced UV and blue UC radiations in Y ₂O₃:Er³⁺, Li⁺ nanocrystals can reach about half that in Y ₂O₃:Er³⁺ ceramic bulk. Such anomalous enhancement behavior for UV and blue UC radiations originates from the fact that the tailored lifetime of the ⁴S_{3 / 2} state was further involved for their generation, contrasted to the green UC emission involving only the tailored lifetime of the ⁴I_{11 / 2} state. Theoretical calculations based on steady state equations evidenced these conclusions.

Original language	English
Pages (from-to)	96-100
Number of pages	5
Journal	Solid State Communications
Volume	148
Issue number	3-4
DOIs	https://doi.org/10.1016/j.ssc.2008.08.001
State	Published - Oct 2008

Keywords

D. Enhancement
D. Multiphoton
D. Optical properties
D. Upconversion

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title = "Enhanced multiphoton ultraviolet and blue upconversion emissions in Y 2O3: Er3+ nanocrystals by codoping with Li+ ions",

abstract = "Ultraviolet (UV) and blue upconversion (UC) radiations with large and anomalous enhancement were observed in Y 2O3:Er3+ nanocrystals under laser excitation of 970 nm. Three-photon UV and blue UC radiations were enhanced by about 60 times via codoping with Li+ ions, in remarked contrast to the 45 times enhancement for two-photon green UC radiation. The integrated intensity of enhanced UV and blue UC radiations in Y 2O3:Er3+, Li+ nanocrystals can reach about half that in Y 2O3:Er3+ ceramic bulk. Such anomalous enhancement behavior for UV and blue UC radiations originates from the fact that the tailored lifetime of the 4S3 / 2 state was further involved for their generation, contrasted to the green UC emission involving only the tailored lifetime of the 4I11 / 2 state. Theoretical calculations based on steady state equations evidenced these conclusions.",

keywords = "D. Enhancement, D. Multiphoton, D. Optical properties, D. Upconversion",

author = "Chen, \{G. Y.\} and Liu, \{H. C.\} and Liang, \{H. J.\} and G. Somesfalean and Zhang, \{Z. G.\}",

year = "2008",

month = oct,

doi = "10.1016/j.ssc.2008.08.001",

language = "英语",

volume = "148",

pages = "96--100",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Ltd",

number = "3-4",

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TY - JOUR

T1 - Enhanced multiphoton ultraviolet and blue upconversion emissions in Y 2O3

T2 - Er3+ nanocrystals by codoping with Li+ ions

AU - Chen, G. Y.

AU - Liu, H. C.

AU - Liang, H. J.

AU - Somesfalean, G.

AU - Zhang, Z. G.

PY - 2008/10

Y1 - 2008/10

N2 - Ultraviolet (UV) and blue upconversion (UC) radiations with large and anomalous enhancement were observed in Y 2O3:Er3+ nanocrystals under laser excitation of 970 nm. Three-photon UV and blue UC radiations were enhanced by about 60 times via codoping with Li+ ions, in remarked contrast to the 45 times enhancement for two-photon green UC radiation. The integrated intensity of enhanced UV and blue UC radiations in Y 2O3:Er3+, Li+ nanocrystals can reach about half that in Y 2O3:Er3+ ceramic bulk. Such anomalous enhancement behavior for UV and blue UC radiations originates from the fact that the tailored lifetime of the 4S3 / 2 state was further involved for their generation, contrasted to the green UC emission involving only the tailored lifetime of the 4I11 / 2 state. Theoretical calculations based on steady state equations evidenced these conclusions.

AB - Ultraviolet (UV) and blue upconversion (UC) radiations with large and anomalous enhancement were observed in Y 2O3:Er3+ nanocrystals under laser excitation of 970 nm. Three-photon UV and blue UC radiations were enhanced by about 60 times via codoping with Li+ ions, in remarked contrast to the 45 times enhancement for two-photon green UC radiation. The integrated intensity of enhanced UV and blue UC radiations in Y 2O3:Er3+, Li+ nanocrystals can reach about half that in Y 2O3:Er3+ ceramic bulk. Such anomalous enhancement behavior for UV and blue UC radiations originates from the fact that the tailored lifetime of the 4S3 / 2 state was further involved for their generation, contrasted to the green UC emission involving only the tailored lifetime of the 4I11 / 2 state. Theoretical calculations based on steady state equations evidenced these conclusions.

KW - D. Enhancement

KW - D. Multiphoton

KW - D. Optical properties

KW - D. Upconversion

UR - https://www.scopus.com/pages/publications/50449104786

U2 - 10.1016/j.ssc.2008.08.001

DO - 10.1016/j.ssc.2008.08.001

M3 - 文章

AN - SCOPUS:50449104786

SN - 0038-1098

VL - 148

SP - 96

EP - 100

JO - Solid State Communications

JF - Solid State Communications

IS - 3-4

ER -

Enhanced multiphoton ultraviolet and blue upconversion emissions in Y ₂O₃: Er³⁺ nanocrystals by codoping with Li⁺ ions

Abstract

Keywords

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