Red Luminescence Properties of TiZn₂O₄ Phosphor

Abstract:

The red phosphor (TiZn₂O₄) is formed from TiO₂ and ZnO via simple solid-state reaction. This red phosphor is prepared by chemically stable as well as inexpensive oxide materials. Emission and excitation spectra are investigated for this phosphor. Photoluminescence (PL) measurements reveal that this phosphor emits bright red emission at 611 nm, which is associated with ⁵D₀ – ⁷F₂ transition, with near UV (395 nm) and blue light excitation (470 nm). The measured decay time of this red emission can be fitted well with a fast decay time of 67 ms and a slow decay time of 208 ms, respectively. A broad grain size distribution is observed for TiZn₂O₄ phosphor. Further, photoluminescence excitation (PLE) shows a good absorption band near UV, and the blue spectral region of visible spectrum as well. The optical properties, X-ray diffraction (XRD) measurements, and scanning electron micrographs (SEM) of this TiZn₂O₄ phosphor are studied.

• Periodical: Applied Mechanics and Materials (Volume 864)
• Pages: 94-99
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.864.94
• Online since: April 2017
• Authors: Sung Sik Chang*
• Keywords: Decay Time, Optical Properties, Phosphor, Photoluminescence

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