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Site-selective spectra and time-resolved spectra of nanocrystalline Y2O3:Eu

✍ Scribed by Zhang Wei-Wei; Xu Mei; Zhang Wei-Ping; Yin Min; Qi Ze-Ming; Xia Shang-Da; Claudine Garapon

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
345 KB
Volume
376
Category
Article
ISSN
0009-2614

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✦ Synopsis

Nanocrystalline Y 2 O 3 :Eu of cubic crystal structure with different particle size was prepared by combustion reaction. High-resolution electron microscope images and extended X-ray absorption fine structure (EXAFS) analysis of the nanoscale samples indicate defected crystalline particles and co-existence of an amorphous phase. Novel emission bands centered at 613 and 622 nm with a lifetime of 0.4 ms emerge in nanoscale Y 2 O 3 :Eu. Site-selective spectra and time-resolved spectra show that the novel emission bands are from the amorphous phase in nanoscale samples.

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