【摘 要】
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Nanocrystalline monoclinic and cubic Gd2O3∶Eu with different Eu3+ concentration were prepared using glycine-nitrate combustion synthesis. By changing the ratio
【机 构】
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Structure Research Laboratory, Department of physics
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Nanocrystalline monoclinic and cubic Gd2O3∶Eu with different Eu3+ concentration were prepared using glycine-nitrate combustion synthesis. By changing the ratio of glycine to nitrate and proper heat treatment, pure monoclinic and cubic Gd2O3∶Eu with particle size less than 40 nm can be easily formed. Under ultraviolet excitation, main emission of Eu3+(5D0→7F2) locates at 624 nm in monoclinic Gd2O3∶Eu and 611 nm in cubic sample. In excitation spectrum two broad bands corresponding to the host absorption and charge transfer state(CTS) and f-f transitions of Gd3+ and Eu3+ were observed and discussed. The quenching concentration of monoclinic and cubic Gd2O3∶Eu is 10% and 15%, respectively, both of which are much higher than that of bulk Gd2O3∶Eu.
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