Enhancement of violet and ultraviolet upconversion emissions in Yb3+/Er3+-codoped YF3 nanocrystals

Guofeng Wang; Weiping Qin; Jisen Zhang; Jishuang Zhang; Yan Wang; Chunyan Cao; Lili Wang; Guodong Wei; Peifen Zhu; Ryongjin Kim

doi:10.1016/j.optmat.2008.04.013

Enhancement of violet and ultraviolet upconversion emissions in Yb³⁺/Er³⁺-codoped YF₃ nanocrystals

Guofeng Wang
, Weiping Qin
, Jisen Zhang
, Jishuang Zhang
, Yan Wang
, Chunyan Cao
, Lili Wang
, Guodong Wei
, Peifen Zhu
, Ryongjin Kim

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

47 Scopus citations

Abstract

Pumped with a 980-nm diode laser, violet/ultraviolet upconversion fluorescence was presented in Y_0.83Yb_0.15Er_0.02F₃ nanocrystals. Observed emissions at 318 nm and 379 nm were affirmed coming from a four-photon excitation process. In comparison with a bulk sample having the same chemical compositions, the nanocrystals had a markedly enhanced ability of emitting violet/ultraviolet upconversion fluorescence. By employing Tm³⁺ ions as structural probes in the samples, we found that the enhancement could be attributed to the decrease of Judd-Ofelt parameter Ω₂. A model for revealing the four-photon excitation process was proposed based on spectral analysis.

Original language	English
Pages (from-to)	296-299
Number of pages	4
Journal	Optical Materials
Volume	31
Issue number	2
DOIs	https://doi.org/10.1016/j.optmat.2008.04.013
State	Published - 2008
Externally published	Yes

Keywords

Judd-Ofelt parameter
Microwave irradiation
Nanocrystals
Upconversion

Access to Document

10.1016/j.optmat.2008.04.013

Cite this

@article{a2cc49296d5845f7bca29bab038f7b1c,

title = "Enhancement of violet and ultraviolet upconversion emissions in Yb3+/Er3+-codoped YF3 nanocrystals",

abstract = "Pumped with a 980-nm diode laser, violet/ultraviolet upconversion fluorescence was presented in Y0.83Yb0.15Er0.02F3 nanocrystals. Observed emissions at 318 nm and 379 nm were affirmed coming from a four-photon excitation process. In comparison with a bulk sample having the same chemical compositions, the nanocrystals had a markedly enhanced ability of emitting violet/ultraviolet upconversion fluorescence. By employing Tm3+ ions as structural probes in the samples, we found that the enhancement could be attributed to the decrease of Judd-Ofelt parameter Ω2. A model for revealing the four-photon excitation process was proposed based on spectral analysis.",

keywords = "Judd-Ofelt parameter, Microwave irradiation, Nanocrystals, Upconversion",

author = "Guofeng Wang and Weiping Qin and Jisen Zhang and Jishuang Zhang and Yan Wang and Chunyan Cao and Lili Wang and Guodong Wei and Peifen Zhu and Ryongjin Kim",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 10474096 and 50672030). ",

year = "2008",

doi = "10.1016/j.optmat.2008.04.013",

language = "English",

volume = "31",

pages = "296--299",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Enhancement of violet and ultraviolet upconversion emissions in Yb3+/Er3+-codoped YF3 nanocrystals

AU - Wang, Guofeng

AU - Qin, Weiping

AU - Zhang, Jisen

AU - Zhang, Jishuang

AU - Wang, Yan

AU - Cao, Chunyan

AU - Wang, Lili

AU - Wei, Guodong

AU - Zhu, Peifen

AU - Kim, Ryongjin

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 10474096 and 50672030).

PY - 2008

Y1 - 2008

N2 - Pumped with a 980-nm diode laser, violet/ultraviolet upconversion fluorescence was presented in Y0.83Yb0.15Er0.02F3 nanocrystals. Observed emissions at 318 nm and 379 nm were affirmed coming from a four-photon excitation process. In comparison with a bulk sample having the same chemical compositions, the nanocrystals had a markedly enhanced ability of emitting violet/ultraviolet upconversion fluorescence. By employing Tm3+ ions as structural probes in the samples, we found that the enhancement could be attributed to the decrease of Judd-Ofelt parameter Ω2. A model for revealing the four-photon excitation process was proposed based on spectral analysis.

AB - Pumped with a 980-nm diode laser, violet/ultraviolet upconversion fluorescence was presented in Y0.83Yb0.15Er0.02F3 nanocrystals. Observed emissions at 318 nm and 379 nm were affirmed coming from a four-photon excitation process. In comparison with a bulk sample having the same chemical compositions, the nanocrystals had a markedly enhanced ability of emitting violet/ultraviolet upconversion fluorescence. By employing Tm3+ ions as structural probes in the samples, we found that the enhancement could be attributed to the decrease of Judd-Ofelt parameter Ω2. A model for revealing the four-photon excitation process was proposed based on spectral analysis.

KW - Judd-Ofelt parameter

KW - Microwave irradiation

KW - Nanocrystals

KW - Upconversion

UR - https://www.scopus.com/pages/publications/55949115570

U2 - 10.1016/j.optmat.2008.04.013

DO - 10.1016/j.optmat.2008.04.013

M3 - Article

AN - SCOPUS:55949115570

SN - 0925-3467

VL - 31

SP - 296

EP - 299

JO - Optical Materials

JF - Optical Materials

IS - 2