Effect of Dielectric Loss on Luminescence Properties of Powder Electroluminescent Device Using Paper Substrate

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  • TAKEDA Naoki
    Department of Media Engineering, Graduate School of Engineering, Tokyo Polytechnic University
  • TSUNEYASU Shota
    Department of Media Engineering, Graduate School of Engineering, Tokyo Polytechnic University
  • SATOH Toshifumi
    Department of Media Engineering, Graduate School of Engineering, Tokyo Polytechnic University

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  • 紙基板上に作製した分散型ELの発光特性に及ぼす誘電損失の影響
  • カミ キバン ジョウ ニ サクセイ シタ ブンサンガタ EL ノ ハッコウ トクセイ ニ オヨボス ユウデン ソンシツ ノ エイキョウ

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Abstract

<p>Powder EL (Electroluminescent) device is a flat light-emitting device producible only in a printing process, without the need for semiconductor processes, such as vacuum and plasma. Its structure where a dielectric is sandwiched between two planar electrodes. For this reason, the powder EL device has characteristics similar to a capacitor, but it is conceivable that dielectric loss occurs when an AC voltage is applied. In this study, in order to clarify the influence of dielectric loss in powder EL device on a paper substrate, the frequency dependence of current, luminance and tanδ was measured. As a result, it was found that changes in current and luminance with increasing frequency are non-linear. Also, at frequencies where tanδ showed a large value, the increment of current was small. Therefore, it was clarified that the frequency characteristics of dielectric loss greatly influence the frequency characteristics of current and luminance.</p>

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