Enhancement of the upconversion radiation in Y2 O3: Er3+ nanocrystals by codoping with Li+ ions

G. Y. Chen; H. C. Liu; G. Somesfalean; Y. Q. Sheng; H. J. Liang; Z. G. Zhang; Q. Sun; F. P. Wang

doi:10.1063/1.2901039

Enhancement of the upconversion radiation in Y2 O3: Er3+ nanocrystals by codoping with Li+ ions

G. Y. Chen
, H. C. Liu
, G. Somesfalean
, Y. Q. Sheng
, H. J. Liang
, Z. G. Zhang
, Q. Sun
, F. P. Wang

School of Chemistry and Chemical Engineering

Harbin Institute of Technology

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

172 Scopus citations

Abstract

We report on an innovative route to increase the upconversion (UC) green radiation by two orders of magnitude in Y2 O3: Er3+ nanocrystals through tailoring Er3+ ions' local environment with Li+ ions under diode laser excitation of 970 nm. Theoretical investigations based on the steady-state rate equations indicate that such enhancement arises from a combining effect of the tailored lifetime of the intermediate I 112 4 (Er) state, the suppressed cross relaxation H 112 2 (Er) + I 152 4 (Er) → I 92 4 (Er) + I 132 4 (Er) process, and the enlarged nanocrystal size induced by the Li+ ions. The proposed route here may constitute a promising step to solve the low efficiency problem in UC materials.

Original language	English
Article number	113114
Journal	Applied Physics Letters
Volume	92
Issue number	11
DOIs	https://doi.org/10.1063/1.2901039
State	Published - 2008

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title = "Enhancement of the upconversion radiation in Y2 O3: Er3+ nanocrystals by codoping with Li+ ions",

abstract = "We report on an innovative route to increase the upconversion (UC) green radiation by two orders of magnitude in Y2 O3: Er3+ nanocrystals through tailoring Er3+ ions' local environment with Li+ ions under diode laser excitation of 970 nm. Theoretical investigations based on the steady-state rate equations indicate that such enhancement arises from a combining effect of the tailored lifetime of the intermediate I 112 4 (Er) state, the suppressed cross relaxation H 112 2 (Er) + I 152 4 (Er) → I 92 4 (Er) + I 132 4 (Er) process, and the enlarged nanocrystal size induced by the Li+ ions. The proposed route here may constitute a promising step to solve the low efficiency problem in UC materials.",

author = "Chen, \{G. Y.\} and Liu, \{H. C.\} and G. Somesfalean and Sheng, \{Y. Q.\} and Liang, \{H. J.\} and Zhang, \{Z. G.\} and Q. Sun and Wang, \{F. P.\}",

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doi = "10.1063/1.2901039",

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TY - JOUR

T1 - Enhancement of the upconversion radiation in Y2 O3

T2 - Er3+ nanocrystals by codoping with Li+ ions

AU - Chen, G. Y.

AU - Liu, H. C.

AU - Somesfalean, G.

AU - Sheng, Y. Q.

AU - Liang, H. J.

AU - Zhang, Z. G.

AU - Sun, Q.

AU - Wang, F. P.

PY - 2008

Y1 - 2008

N2 - We report on an innovative route to increase the upconversion (UC) green radiation by two orders of magnitude in Y2 O3: Er3+ nanocrystals through tailoring Er3+ ions' local environment with Li+ ions under diode laser excitation of 970 nm. Theoretical investigations based on the steady-state rate equations indicate that such enhancement arises from a combining effect of the tailored lifetime of the intermediate I 112 4 (Er) state, the suppressed cross relaxation H 112 2 (Er) + I 152 4 (Er) → I 92 4 (Er) + I 132 4 (Er) process, and the enlarged nanocrystal size induced by the Li+ ions. The proposed route here may constitute a promising step to solve the low efficiency problem in UC materials.

AB - We report on an innovative route to increase the upconversion (UC) green radiation by two orders of magnitude in Y2 O3: Er3+ nanocrystals through tailoring Er3+ ions' local environment with Li+ ions under diode laser excitation of 970 nm. Theoretical investigations based on the steady-state rate equations indicate that such enhancement arises from a combining effect of the tailored lifetime of the intermediate I 112 4 (Er) state, the suppressed cross relaxation H 112 2 (Er) + I 152 4 (Er) → I 92 4 (Er) + I 132 4 (Er) process, and the enlarged nanocrystal size induced by the Li+ ions. The proposed route here may constitute a promising step to solve the low efficiency problem in UC materials.

UR - https://www.scopus.com/pages/publications/41049110488

U2 - 10.1063/1.2901039

DO - 10.1063/1.2901039

M3 - 文章

AN - SCOPUS:41049110488

SN - 0003-6951

VL - 92

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 11

M1 - 113114

ER -

Enhancement of the upconversion radiation in Y2 O3: Er3+ nanocrystals by codoping with Li+ ions

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