Size-dependent color and luminescences of organic microcrystals

Hitoshi Kasai, Hirokazu Kamatani, Shuji Okada, Hidetoshi Oikawa, Hiro Matsuda, Hachiro Nakanishi

    研究成果: Article査読

    281 被引用数 (Scopus)


    Perylene microcrystals with different sizes from about 50 nm to about 200 nm were prepared using the reprecipitation method. Their excitonic absorption peaks were found to shift to the high energy side with decreasing crystal size, that is to say, the shifts from that of the bulk crystal were about 500 cm-1 and 1420 cm-1 for 200 nm and 50 nm microcrystals, respectively. Moreover, strong fluorescence from the free-exciton energy level in the microcrystals was observed even at room temperature, which is not usually observed in bulk crystals.

    ジャーナルJapanese Journal of Applied Physics, Part 2: Letters
    2 B
    出版ステータスPublished - 1996 1 1

    ASJC Scopus subject areas

    • 工学(全般)
    • 物理学および天文学(その他)
    • 物理学および天文学(全般)


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