Variation of Structure and Photoluminescence Properties of Ce3+ Doped MgAlON Transparent Ceramics with Different Doping Content

To determine the optimal doping concentration, a series of Mn:MgAl2O4 were successfully prepared through vacuum-sintering with the highest doping concentration up to 35%. Samples with a low doping concentration exhibit a light green color. When the doping concentration increases, its color becomes deeper and deeper and when the doping concentration reaches 14%, their colors become brown and deeper brown when their concentrations further increase. The crystal phases of the samples were manifested by XRD measurements and their photoluminescence properties were studied. Combined with phase analysis, optimal doping concentration of transparent ceramics has been determined. In addition, the mechanism for fluorescence of Mn:MgAl2O4 transparent ceramics has also been discussed.

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Radio-photoluminescence properties of silver-doped cesium chloride transparent ceramics

Journal of Luminescence ◽

10.1016/j.jlumin.2021.118099 ◽

2021 ◽

pp. 118099

Author(s):

Hiromi Kimura ◽

Go Okada ◽

Takumi Kato ◽

Daisuke Nakauchi ◽

Noriaki Kawaguchi ◽

...

Keyword(s):

Cesium Chloride ◽

Transparent Ceramics ◽

Photoluminescence Properties

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Effects of Na+ on Spectral Properties of Er3+: CaF2 Transparent Ceramic

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.531-532.307 ◽

2012 ◽

Vol 531-532 ◽

pp. 307-311

Author(s):

Wei Wei Li ◽

Bing Chu Mei ◽

Xiaonv Li ◽

Jing Hong Song ◽

Guang Lin Zhi

Keyword(s):

Spectral Properties ◽

Room Temperature ◽

Dopant Concentration ◽

Emission Spectra ◽

Transparent Ceramic ◽

Transparent Ceramics ◽

Photoluminescence Properties ◽

Pressing Method ◽

Co Doping ◽

Optimal Value

Er3+, Na+-co-doped CaF2 transparent ceramics with Er3+ dopant concentration of 5at% and Na+ of 0, 0.5, 1.0 and 1.5at% were fabricated by the vacuum hot pressing method. Absorption spectra, emission spectra and fluorescence lifetimes were measured at room temperature to study the effects of Na+ on the spectral properties of Er3+: CaF2 transparent ceramic. The results showed that after introducing Na ion into Er3+: CaF2 transparent ceramics, charge-neutralized Er3+-Na+ structure formed which prevented Er3+ from clustering, the absorption intensity of ceramics decreased with the increase of Na+ concentration, but the spectroscopy and photoluminescence properties of Er3+ in CaF2 transparent ceramic could be modulated by adjusting the concentration of Na+. Co-doping Na+ to increase fluorescence lifetime should have an optimal value.

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Dimensionally-Controlled Hydrothermal Tm3+-doped Oxidic Nanocrystals and Their Photoluminescence Properties

MRS Proceedings ◽

10.1557/proc-1247-c04-15 ◽

2010 ◽

Vol 1247 ◽

Author(s):

Rocío Calderón-Villajos ◽

Carlos Zaldo ◽

Concepción Cascales

Keyword(s):

Single Crystals ◽

Fluorescence Lifetimes ◽

Photoluminescence Properties ◽

Reaction Conditions ◽

Hydrothermal Processes ◽

Bulk Single Crystals ◽

Template Free ◽

Reaction Media

AbstractControlled reaction conditions in simple, template-free hydrothermal processes yield Tm-Lu2O3 and Tm-GdVO4 nanocrystals with well-defined specific morphologies and sizes. In both oxide families, nanocrystals prepared at pH 7 reaction media exhibit photoluminescence in ∼1.95 μm similar to bulk single crystals. For the lowest Tm3+ concentration (0.2 % mol) in GdVO4 measured 3H4 and 3F4 fluorescence lifetimes τ are very near to τrad.

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