Upconversion in Er3+:ZrO2 nanocrystals

Amitava Patra; Christopher S. Friend; Rakesh Kapoor; Paras N. Prasad

doi:10.1021/jp013576z

Upconversion in Er³⁺:ZrO₂ nanocrystals

Amitava Patra
, Christopher S. Friend
, Rakesh Kapoor
, Paras N. Prasad

Chemistry

SUNY Buffalo

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

419 Scopus citations

Abstract

Erbium-doped ZrO₂ nanoparticles are prepared by a sol-emulsion-gel technique. The effects of the Er³⁺ concentration and different codopants (Yb³⁺ and Y³⁺) in the ZrO₂ matrix on the upconverted emission are reported. Green and red upconversion emission at 550 and 670 nm were observed from these oxide nanocrystals with 980 nm excitation. The overall intensity decreases with an increasing concentration of erbium in zirconia. The presence of codopants (Y³⁺ and Yb³⁺) also increases the overall intensity of the upconverted emission. The emission spectra and the pump intensity dependence of the luminescence intensities are used to understand the excitation mechanism. These results confirm that upconverted emission in these materials is due to a two-photon excited-state absorption (ESA)/energy transfer upconversion (ETU) process.

Original language	English
Pages (from-to)	1909-1912
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	106
Issue number	8
DOIs	https://doi.org/10.1021/jp013576z
State	Published - Feb 28 2002

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title = "Upconversion in Er3+:ZrO2 nanocrystals",

abstract = "Erbium-doped ZrO2 nanoparticles are prepared by a sol-emulsion-gel technique. The effects of the Er3+ concentration and different codopants (Yb3+ and Y3+) in the ZrO2 matrix on the upconverted emission are reported. Green and red upconversion emission at 550 and 670 nm were observed from these oxide nanocrystals with 980 nm excitation. The overall intensity decreases with an increasing concentration of erbium in zirconia. The presence of codopants (Y3+ and Yb3+) also increases the overall intensity of the upconverted emission. The emission spectra and the pump intensity dependence of the luminescence intensities are used to understand the excitation mechanism. These results confirm that upconverted emission in these materials is due to a two-photon excited-state absorption (ESA)/energy transfer upconversion (ETU) process.",

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T1 - Upconversion in Er3+:ZrO2 nanocrystals

AU - Patra, Amitava

AU - Friend, Christopher S.

AU - Kapoor, Rakesh

AU - Prasad, Paras N.

PY - 2002/2/28

Y1 - 2002/2/28

N2 - Erbium-doped ZrO2 nanoparticles are prepared by a sol-emulsion-gel technique. The effects of the Er3+ concentration and different codopants (Yb3+ and Y3+) in the ZrO2 matrix on the upconverted emission are reported. Green and red upconversion emission at 550 and 670 nm were observed from these oxide nanocrystals with 980 nm excitation. The overall intensity decreases with an increasing concentration of erbium in zirconia. The presence of codopants (Y3+ and Yb3+) also increases the overall intensity of the upconverted emission. The emission spectra and the pump intensity dependence of the luminescence intensities are used to understand the excitation mechanism. These results confirm that upconverted emission in these materials is due to a two-photon excited-state absorption (ESA)/energy transfer upconversion (ETU) process.

AB - Erbium-doped ZrO2 nanoparticles are prepared by a sol-emulsion-gel technique. The effects of the Er3+ concentration and different codopants (Yb3+ and Y3+) in the ZrO2 matrix on the upconverted emission are reported. Green and red upconversion emission at 550 and 670 nm were observed from these oxide nanocrystals with 980 nm excitation. The overall intensity decreases with an increasing concentration of erbium in zirconia. The presence of codopants (Y3+ and Yb3+) also increases the overall intensity of the upconverted emission. The emission spectra and the pump intensity dependence of the luminescence intensities are used to understand the excitation mechanism. These results confirm that upconverted emission in these materials is due to a two-photon excited-state absorption (ESA)/energy transfer upconversion (ETU) process.

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DO - 10.1021/jp013576z

M3 - Article

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SN - 1520-6106

VL - 106

SP - 1909

EP - 1912

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 8

ER -

Upconversion in Er³⁺:ZrO₂ nanocrystals

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