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http://dx.doi.org/10.5369/JSST.2002.11.1.060

Photoluminescence Characteristics of the ZnGa2O4 Phosphor Thin Films as a Function of Post-annealing Temperature  

Yi, Soung-Soo (Department of Photonics, Silla University)
Jeong, Jung-Hyun (Department of Physics, Pukyong National University)
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Abstract
$ZnGa_2O_4$ thin film phosphors have been deposited using a pulsed laser deposition method on Si(100) substrates at a substrate temperature of $550^{\circ}C$ with oxygen pressures of 100mTorr, and subsequently to investigate their photoluminescence characteristics after post-annealed at $600^{\circ}C$ and $700^{\circ}C$. As a result for X-ray diffraction, $Ga_2O_3$ shape appeared with increasing annealing temperature. The luminescent spectra show a broad band extending from 350 to 600nm peaking at 460nm. A post-annealing treatment of $ZnGa_2O_4$ thin films led to the different shape of luminescent intensity and grain size.
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