Four-photon upconversion induced by infrared diode laser excitation in rare-earth-ion-doped Y2O3 nanocrystals

G. Y. Chen; Y. Liu; Z. G. Zhang; B. Aghahadi; G. Somesfalean; Q. Sun; F. P. Wang

doi:10.1016/j.cplett.2007.09.078

Four-photon upconversion induced by infrared diode laser excitation in rare-earth-ion-doped Y₂O₃ nanocrystals

G. Y. Chen
, Y. Liu
, Z. G. Zhang^*
, B. Aghahadi
, G. Somesfalean
, Q. Sun
, F. P. Wang

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Harbin Institute of Technology

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

53 Scopus citations

Abstract

Room-temperature blue and violet upconversion (UC) emissions of Er³⁺ at 409 nm (²H_9/2 →⁴I_15/2) and 390 nm (⁴G_11/2 →⁴I_15/2) were observed in Y₂O₃:Yb³⁺-Er³⁺ nanocrystals by diode laser excitation of 980 nm. At low Yb³⁺ concentration both wavelengths result from three-photon UC processes. Unexpectedly, a four-photon and a decreased three-photon UC processes were observed at high Yb³⁺ concentration for the violet and the blue emissions, respectively. The four-photon process supposably results from the cross relaxation ⁴D_7/2 +⁴I_15/2 →⁴G_11/2 +⁴I_13/2 of Er³⁺ ions with the ⁴D_7/2 state populated by the 2²F_5/2(Yb) +⁴F_9/2(Er) → 2²F_7/2(Yb) +⁴D_7/2(Er) process, whereas the decreased photon process arises from the larger UC rate at high Yb³⁺ concentration.

Original language	English
Pages (from-to)	127-131
Number of pages	5
Journal	Chemical Physics Letters
Volume	448
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2007.09.078
State	Published - 5 Nov 2007

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@article{11a003a405ea4f9ba52b86f091a86ed6,

title = "Four-photon upconversion induced by infrared diode laser excitation in rare-earth-ion-doped Y2O3 nanocrystals",

abstract = "Room-temperature blue and violet upconversion (UC) emissions of Er3+ at 409 nm (2H9/2 → 4I15/2) and 390 nm (4G11/2 → 4I15/2) were observed in Y2O3:Yb3+-Er3+ nanocrystals by diode laser excitation of 980 nm. At low Yb3+ concentration both wavelengths result from three-photon UC processes. Unexpectedly, a four-photon and a decreased three-photon UC processes were observed at high Yb3+ concentration for the violet and the blue emissions, respectively. The four-photon process supposably results from the cross relaxation 4D7/2 + 4I15/2 → 4G11/2 + 4I13/2 of Er3+ ions with the 4D7/2 state populated by the 22F5/2(Yb) + 4F9/2(Er) → 22F7/2(Yb) + 4D7/2(Er) process, whereas the decreased photon process arises from the larger UC rate at high Yb3+ concentration.",

author = "Chen, \{G. Y.\} and Y. Liu and Zhang, \{Z. G.\} and B. Aghahadi and G. Somesfalean and Q. Sun and Wang, \{F. P.\}",

year = "2007",

month = nov,

day = "5",

doi = "10.1016/j.cplett.2007.09.078",

language = "英语",

volume = "448",

pages = "127--131",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Four-photon upconversion induced by infrared diode laser excitation in rare-earth-ion-doped Y2O3 nanocrystals

AU - Chen, G. Y.

AU - Liu, Y.

AU - Zhang, Z. G.

AU - Aghahadi, B.

AU - Somesfalean, G.

AU - Sun, Q.

AU - Wang, F. P.

PY - 2007/11/5

Y1 - 2007/11/5

N2 - Room-temperature blue and violet upconversion (UC) emissions of Er3+ at 409 nm (2H9/2 → 4I15/2) and 390 nm (4G11/2 → 4I15/2) were observed in Y2O3:Yb3+-Er3+ nanocrystals by diode laser excitation of 980 nm. At low Yb3+ concentration both wavelengths result from three-photon UC processes. Unexpectedly, a four-photon and a decreased three-photon UC processes were observed at high Yb3+ concentration for the violet and the blue emissions, respectively. The four-photon process supposably results from the cross relaxation 4D7/2 + 4I15/2 → 4G11/2 + 4I13/2 of Er3+ ions with the 4D7/2 state populated by the 22F5/2(Yb) + 4F9/2(Er) → 22F7/2(Yb) + 4D7/2(Er) process, whereas the decreased photon process arises from the larger UC rate at high Yb3+ concentration.

AB - Room-temperature blue and violet upconversion (UC) emissions of Er3+ at 409 nm (2H9/2 → 4I15/2) and 390 nm (4G11/2 → 4I15/2) were observed in Y2O3:Yb3+-Er3+ nanocrystals by diode laser excitation of 980 nm. At low Yb3+ concentration both wavelengths result from three-photon UC processes. Unexpectedly, a four-photon and a decreased three-photon UC processes were observed at high Yb3+ concentration for the violet and the blue emissions, respectively. The four-photon process supposably results from the cross relaxation 4D7/2 + 4I15/2 → 4G11/2 + 4I13/2 of Er3+ ions with the 4D7/2 state populated by the 22F5/2(Yb) + 4F9/2(Er) → 22F7/2(Yb) + 4D7/2(Er) process, whereas the decreased photon process arises from the larger UC rate at high Yb3+ concentration.

UR - https://www.scopus.com/pages/publications/35448951715

U2 - 10.1016/j.cplett.2007.09.078

DO - 10.1016/j.cplett.2007.09.078

M3 - 文章

AN - SCOPUS:35448951715

SN - 0009-2614

VL - 448

SP - 127

EP - 131

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Four-photon upconversion induced by infrared diode laser excitation in rare-earth-ion-doped Y₂O₃ nanocrystals

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