Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
Regular Issue: Papers
Modulation of the optical properties of Pr3+-doped Y2O3 ceramics by Zr doping
Yumiko KATAYAMAHideki TOMIMOTOJumpei UEDASetsuhisa TANABE
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Keywords: Y2O3, Zr, Pr3+, Luminescence
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Volume 122 (2014) Issue 1421 Pages 89-92

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The photoluminescence properties of 0.2% Pr3+-doped (Y1–0.01xZr0.01x)2O3, (x = 0, 0.1, 1, 3, 4.5, 6) ceramics were investigated. The luminescence intensity due to the transition from the 3P0 level increased drastically when the Zr content x increased, which is completely quenched in Y2O3:Pr3+ (x = 0) due to the thermal relaxation through the lowest 5d level of the Pr3+ ion. By monitoring at 630 nm (1D23H4), we found that the 4f–5d photoluminescence excitation bands for Pr3+ in the two six-fold sites [C2 and S6 in the Y2O3:Pr3+ (x = 0)] were observed at approximately 300 and 340 nm. On the other hand, when monitored at 510 nm (3P03H4), the Zr-doped samples showed an additional 4f–5d band at 280 nm. Based on these results, we concluded that the 3P0 luminescence is from Pr3+ in a seven-fold site, which is generated by incorporation of an additional oxygen via a defect chemical reaction, $2\text{ZrO}_2 \xrightarrow{\text{Y}_2 \text{O}_3} 2\text{Zr}_\text{Y}^ \bullet + \text{O}_\text{i}^{\text{\prime\prime}} + 3\text{O}_\text{O}^\text{x}$.