White-Emitting Thin-Film Electroluminescence Devices with SrS Phosphor Doubly Activated with Rare-Earth Ions

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概要

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• Thin-film electroluminescence (TFEL) devices with SrS-based phosphor layers have been investigated to obtain white emissions by mixing emissions of two different rare-earth activators, and new white-emitting phosphor layers, except for SrS:Pr, Ce, have been developed. SrS:Sm, Ce and SrS:Nd, Ho phosphor layers show white El-emissions, whose color coordinates correspond to points in the white area on the CIE chromaticity diagram. The EL emissions of SrS:Pr, Ce, SrS:Nd, Ce, and SrS:Ho, Ce phosphor layers are not found in the white area, but are close to the area. Luminance of the emissions, for devices driven with a sinusoidal voltage of 5 kHz, are 200-750 cd/m^2, The three primary colors, red, green and blue, can be extracted from the emission of all these devices with color filters. Relative intensities of the three extracted colors are evaluated.

• 社団法人応用物理学会の論文
• 1990-10-20

著者

• Okamoto Shinji

  Nhk Science And Technical Research Laboratories

• Okamoto S

  Sumitomo Sitix Corp. Saga Jpn

• TSUCHIYA Yasuaki

  Division of Chemistry, Graduate School of Science, Kyoto University

• Nakazawa Eiichiro

  NHK Science and Technical Research Laboratories

• TSUCHIYA Yuzuru

  NHK Science & Technical Research Laboratories

• Nakazawa E

  Kogakuin Univ. Tokyo Jpn

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