Upconversion luminescence in Er3+/Yb3+ codoped Y2CaGe4O12 / Leonidov I. I.,Zubkov V. G.,Tyutyunnik A. P.,Tarakina N. V.,Surat L. L.,Koryakova O. V.,Vovkotrub E. G. // JOURNAL OF ALLOYS AND COMPOUNDS. - 2011. - V. 509, l. 5. - P. 1339-1346.

ISSN/EISSN:

0925-8388 / нет данных

Type:

Article

Abstract:

Calcium yttrium tetrametagermanates Y2CaGe4O12 doped with Er3+ and Er3+/Yb3+ reveal upconversion emission in visible spectral range under near-infrared excitation, lambda(ex) = 980 nm. For the solid solution ErxY2-xCaGe4O12 concentration dependencies for the green and red lines of the visible emission around 526 nm (H-2(11/2) -> I-4(15/2)), 545 nm (S-4(3/2) -> I-4(15/2)) and 670 nm (F-4(9/2) -> I-4(15/2)) show the optimal value for the sample x = 0.2. The power dependence of the visible luminescence measured at room temperature in the low-power limit indicates two-photon upconversion process. Direct intensification of the upconversion emission signals has been achieved by ytterbium sensitizing. The other upconversion excitation mechanism in Y2CaGe4O12:Er3+ is discussed for an 808 nm incident laser irradiation. A scheme of excitation and emission routes involving ground/excited state absorption, energy transfer upconversion, nonradiative multiphonon relaxation processes in trivalent lanthanide ions in Y2CaGe4O12:Er3+ and Y2CaGe4O12:Er3+, Yb3+ has been proposed. Conditions for visible emission occurrence under quasi-resonance lambda(ex) = 1064 nm excitation depending on pump power values are considered. In the low-power regime only near-infrared emission caused by the transition I-4(13/2) -> I-4(15/2) in erbium ions has been detected. (C) 2010 Elsevier B.V. All rights reserved.

Author keywords:

Upconversion; Luminescence; Ceramics; Oxide materials; Optical properties; Raman spectroscopy RARE-EARTH IONS; COPPER GERMANATES R2CUGE4O12; ASSISTED ENERGY-TRANSFER; TELLURITE GLASSES; CRYSTAL-STRUCTURE; TRANSITION-METAL; ANTI-STOKES; 3-DIMENSIONAL DISPLAY; SOLID-STATE; FLUORESCENCE

DOI:

10.1016/j.jallcom.2010.10.051

Web of Science ID:

ISI:000287167700014

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB 3
Publisher	ELSEVIER SCIENCE SA
Address	PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Language	English
Keywords-Plus	RARE-EARTH IONS; COPPER GERMANATES R2CUGE4O12; ASSISTED ENERGY-TRANSFER; TELLURITE GLASSES; CRYSTAL-STRUCTURE; TRANSITION-METAL; ANTI-STOKES; 3-DIMENSIONAL DISPLAY; SOLID-STATE; FLUORESCENCE
Research-Areas	Chemistry; Materials Science; Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy \& Metallurgical Engineering
Author-Email	ivanleonidov@ihim.uran.ru
ResearcherID-Numbers	Tarakina, Nadezda/A-7870-2013 Leonidov, Ivan/I-6576-2013 Tyutyunnik, Alexander/P-2230-2015
ORCID-Numbers	Tarakina, Nadezda/0000-0002-2365-861X Leonidov, Ivan/0000-0002-6635-4747
Funding-Acknowledgement	RFBR {[}10-03-96028]; UB RAS {[}09-P-3-1009, 10-3-02]
Funding-Text	This work was supported by the RFBR under grant No. 10-03-96028 r\_ural\_a, and grants sponsored by UB RAS (grant Nos. 09-P-3-1009 and 10-3-02). The authors are grateful to A.I. Kuznetsova (DCGE, CICECO, UA, Aveiro, Portugal) and S.R. Nabiev (IIP UB RAS, Ekaterinburg, Russia) for their assistance.
Number-of-Cited-References	52
Usage-Count-Since-2013	44
Journal-ISO	J. Alloy. Compd.
Doc-Delivery-Number	718ZY