Electronic Resource
s.l. ; Stafa-Zurich, Switzerland
Solid state phenomena
Vol. 140 (Oct. 2008), p. 9-16
ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Due to its high quantum efficiency (QE) for luminescence, conventional coarse-grainedYAG:Ce (Y3Al5O12:Ce) finds widespread use in light conversion and scintillator applications.Nanocrystalline YAG:Ce may possess modified optical properties which are advantageous fortechnological applications, but this will depend on highly efficient energy conversion. In this work,the effect of the particle size and Ce concentration on the quantum efficiency and the opticallifetime of the YAG:Ce emission will be characterized and discussed. Nanocrystalline YAG:Cewith an average particle size of 20 to 50 nm was synthesized by the chemical vapour reaction(CVR) method and subsequently analyzed using various techniques. When comparing thenanocrystalline samples to a coarse-grained reference sample, the particle size and dopingconcentration was found to have a significant influence on quantum efficiency. It was establishedthat the nanocrystalline samples investigated exhibit a lower QE at ambient temperature than thecoarse-grained reference. The results of the optical lifetime measurements are discussed in relationto this reduction in QE
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.140.9.pdf
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