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Blue electroluminescent devices with SrGa2S4:Ce for full-color display

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6 Author(s)
Inoue, Y. ; NHK Sci. & Tech. Res. Labs., Tokyo, Japan ; Kobayashi, K. ; Tanaka, E. ; Okamoto, S.
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In order to realize full-color electroluminescent (EL) displays, which are expected as a dominant candidate for the future multimedia flat panel display, blue EL devices with SrGa2S4:Ce have been prepared by molecular beam epitaxy (MBE). This paper proposes a novel deposition method employing Sr metal and Ga2S4 compound as the source materials. A single-phase SrGa2S4 layer is obtained in a Ga2S3/Sr flux ratio of 60 and at the growth temperature of 560°C. We have obtained the well-saturated blue with CIE color coordinates of x=0.14, y=0.14 and brighter blue EL devices made by optimizing the growth conditions in MBE. The maximum luminance of 70 cd/m2 in comparison with the 3 cd/m2 of our previous EL devices, is achieved at a driving frequency of 1 kHz

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Broadcasting, IEEE Transactions on  (Volume:42 ,  Issue: 3 )