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Advanced Materials

Field Emission of Electron Anions Clathrated in Subnanometer-Sized Cages in [Ca24Al28O64]4+(4e)

Authors

  • Y. Toda,

    1. Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
    2. Transparent Electro-Active Materials Project, Exploratory Research for Advanced Technology, Japan Science and Technology, KSP C-1232, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
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  • S. Matsuishi,

    1. Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
    2. Transparent Electro-Active Materials Project, Exploratory Research for Advanced Technology, Japan Science and Technology, KSP C-1232, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
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  • K. Hayashi,

    1. Transparent Electro-Active Materials Project, Exploratory Research for Advanced Technology, Japan Science and Technology, KSP C-1232, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
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  • K. Ueda,

    1. Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
    2. Present address: Kyushu Institute of Technology, 1-1 Sensui, Kita-Kyushu 804-8550, Japan.
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  • T. Kamiya,

    1. Transparent Electro-Active Materials Project, Exploratory Research for Advanced Technology, Japan Science and Technology, KSP C-1232, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
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  • M. Hirano,

    1. Transparent Electro-Active Materials Project, Exploratory Research for Advanced Technology, Japan Science and Technology, KSP C-1232, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
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  • H. Hosono

    1. Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
    2. Transparent Electro-Active Materials Project, Exploratory Research for Advanced Technology, Japan Science and Technology, KSP C-1232, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
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  • This work is supported in part by a Grant-in-Aid for Culture, Sports, Science and Technology.

Abstract

[Ca24Al28O64]4+(4e) is a new inorganic electride, which is air-stable even at ∼ 300 °C. Its electron field-emission properties originate from electron anions encaged in subnanometer-sized cages embedded in its crystal structure, and the emission current is controlled by Fowler–Nordheim field emission at high electric fields (see Figure). Field-emission display devices demonstrate bright light emission clearly visible under ambient light (inset).

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