Polycrstalline electroluminescent device with Langmuir-Blodgett film
AssigneeKanegafuchi Kagaku Kogyo Kabushiki Kaisha
InventorsMasakazu Uekita, Yasunori Yoshioka
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Abstract
An electroluminescent device comprising a first electrode, a radiating layer adjacent to the first electrode, a second electrode and an organic thin film provided between the radiating layer and the second electrode, wherein the radiating layer is a polycrystalline thin film made of a II-IV compound. The provision of the organic thin film causes the electroluminescent device to have a high level of brightness, although it is driven at a low voltage. This application is a continuation of application Ser. No. 235,788 filed Aug. 22, 1988, now abandoned, which is a continuation of application Ser. No. 842,607 filed Mar. 21, 1986, now abandoned.
Claims14
An electroluminescent device comprising a first electrode, a radiating layer adjacent to said first electrode, a second electrode, appropriate biasing, and a Langmuir-Blodgett organic thin film having a thickness of not more than 2000 .ANG. provided between said radiating layer and said second electrode, wherein said radiating layer is a polycrystalline thin film made of a II-VI compound doped by an activator which is at least one member selected from the group consisting of Mn, Cu, Ag, Tb, Sm, Er, Ho, Pr, Tm, TbF.sub.3, SmF.sub.3, ErF.sub.3, HoF.sub.3, PrF.sub.3, and TmF.sub.3, said II-VI compound being the combination of at least one element from group IIA and group IIB and at least one element from group VIB.
Dependencies are inferred from the claim text.