1 September 1995 Photoluminescence properties of ZnGa2O4:Mn phosphor powders
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Abstract
We present the results of a systematic photoluminescence study of ZnGa2O4:Mn phosphor powder. This phosphor exhibits bright green luminescence with a spectral peak at 2.46 eV and CIE chromaticity coordinates of x equals 0.073 and y equals 0.696 at room temperature. At low temperatures the luminescence consisted of three components assigned to the 4T1-6A1 inner transition of the 3D electrons of Mn2+ ions located on different sites of the host crystal. Selective excitations were used to validate the assignment of these features based on a strong-field scheme. The photoluminescence lifetime showed a single exponential decay of about 4 ms and at T equals 1.6 K an optical phonon related fine structure [Ephonon equals (8.2 plus or minus 0.2) meV] of the main photoluminescence line was observed. These results indicate that Mn-doped ZnGa2O4 has the potential to serve as a green phosphor for field emission display (FED) devices. The CIE coordinates of the green emission measured for this phosphor powder are also sufficient to produce a wide color gamut and a true white color when combined with other red and blue phosphors in FED display devices.
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Tuyen K. Tran, Tuyen K. Tran, W. G. Park, W. G. Park, Jens Wolfgang Tomm, Jens Wolfgang Tomm, Brent K. Wagner, Brent K. Wagner, Stuart M. Jacobsen, Stuart M. Jacobsen, Christopher J. Summers, Christopher J. Summers, P. N. Yocom, P. N. Yocom, S. K. McClelland, S. K. McClelland, } "Photoluminescence properties of ZnGa2O4:Mn phosphor powders", Proc. SPIE 2554, Growth and Characterization of Materials for Infrared Detectors II, (1 September 1995); doi: 10.1117/12.218195; https://doi.org/10.1117/12.218195
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