Materials and devices using double-pumped-phosphors with energy transfer

Auzel, F.

doi:10.1109/proc.1973.9155

Cited by 672 publications

(183 citation statements)

References 68 publications

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“…1. The cooperative emission process relies upon Coulomb interaction between ions and strongly depends upon the distance separating them [1][2][3][4][5][6] and its efficiency is determined by the nearest Yb 3ϩ ions. Bearing that in mind, cooperative luminescence from Yb 3ϩ pairs has been proposed as a probe of clustering in Yb 3ϩ -doped glasses, 4,7-9 and its potential application in a three-dimensional solid-state fluorescence display has recently been proposed.…”

Section: Introductionmentioning

confidence: 99%

Blue cooperative luminescence in Yb3+-doped tellurite glasses excited at 1.064 μm

Santos

Vermelho

Gouveia

et al. 2002

The Journal of Chemical Physics

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Blue luminescence emission around 480 nm through cooperative upconversion from pairs of Yb 3ϩ ions implanted into 60TeO 2 -10GeO 2 -10K 2 O-10Li 2 O-10Nb 2 O 5 tellurite glasses and excited by a cw laser at 1.064 m is demonstrated. Cooperative luminescence emission enhancement owing to the temperature dependent multiphonon-assisted anti-Stokes excitation process of the ytterbium ions is also observed. The experimental results revealed a fourfold enhancement in the cooperative luminescence emission when the sample was heated in the temperature range of 20°C-260°C. The thermally induced enhancement is assigned to the effective absorption cross-section for the ytterbium ions which is an increasing function of the medium temperature.

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Section: Introductionmentioning

confidence: 99%

Blue cooperative luminescence in Yb3+-doped tellurite glasses excited at 1.064 μm

Santos

Vermelho

Gouveia

et al. 2002

The Journal of Chemical Physics

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“…In fact, this mechanism is well characterized in many materials, including LNB:Er 3+ /Yb 3+ bulk crystals [16][17][18][19][20][21]. Therefore, in the present work the fabrication of Er 3+ /Yb 3+ -doped LNB nanoparticles by milling and their subsequent optical characterization has been explored, with particular emphasis on whether the characteristic up-conversion phenomena remain unaltered by the process.…”

mentioning

confidence: 99%

Preparation and characterization of stable aqueous suspensions of up-converting Er3+/Yb3+-doped LiNbO3 nanocrystals

Villegas¹,

Caballero²,

Quintanilla

et al. 2011

Appl. Phys. B

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The preparation of LiNb03:Er 3+ /Yb 3+ nanocrystals and their up-conversion properties have been studied. It is demonstrated that polyethyleneimine-(PEÍ) assisted dispersión procedures allow obtaining stable aqueous LiNbÜ3 :Er 3+ /Yb 3+ powder suspensions, with average size particles well below the micron range (100-200 nm) and the isoelectric point of the suspensión reaching valúes well above pH 7. After excitation of Yb 3+ ions at a wavelengfh of 980 nm, the suspensions exhibit efflcient, and stable, IRto-visible (green and red) up-conversion properties, easily observed by the naked eye, very similar to those of the starting crystalline bulk material.

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“…[8][9][10] The YAG:Er 3+ system has several absorption bands at around 490, 800, 970 and 1480 nm, [ 11,12 ] which allows the use of various pumping sources. Although nanoscale inhomogeneity of the Er 3+ distribution in YAG has been reported in single crystals, [ 13 ] it has long been believed that on a macroscopic scale Y 3 Al 5 O 12 and Er 3 Al 5 O 12 form a complete solid solution over the entire concentration range due to the similar ionic radii of Er 3+ ( r = 1.004 Å) and Y 3+ ( r = 1.019 Å).…”

Section: Doi: 101002/adma201302288mentioning

confidence: 99%