LIGHT EMITTER AND DISPLAY DEVICE INCLUDING LIGHT EMITTER

To provide a light emitter having high reliability, a light emitter having high luminous efficiency, or a light emitter having low power consumption, the light emitter being capable of being driven with low voltage.SOLUTION: A light emitter includes: an anode; a luminous layer on the anode; an elect...

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Bibliographic Details
Main Author YASUKAWA KOJI
Format Patent
LanguageEnglish
Japanese
Published 28.02.2019
Subjects
ADVERTISING
CRYPTOGRAPHY
DISPLAY
DISPLAYING
EDUCATION
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
LABELS OR NAME-PLATES
PHYSICS
SEALS
SIGNS
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Summary:To provide a light emitter having high reliability, a light emitter having high luminous efficiency, or a light emitter having low power consumption, the light emitter being capable of being driven with low voltage.SOLUTION: A light emitter includes: an anode; a luminous layer on the anode; an electron transport layer on the luminous layer; a first electron injection layer positioned on the electron transport layer, the first electron injection layer being in contact with the electron transport layer; a second electron injection layer positioned on the first electron injection layer, the second electron injection layer being in contact with the first electron injection layer; and a cathode positioned on the second electron injection layer, the cathode being in contact with the second electron injection layer. The electron transport layer contains an organic compound having an electron transport property higher than its hole transport property and contains at least one of lithium, lithium complex including 8-quinolinol ligand, and magnesium complex including 8-quinolinol ligand. The first electron injection layer contains at least one of lithium and lithium complex including 8-quinolinol ligand. The second electron injection layer contains lanthanoid metal.SELECTED DRAWING: Figure 1 【課題】信頼性の高い発光素子、高い発光効率を有する発光素子、あるいは低電圧駆動が可能な低消費電力の発光素子を提供する。【解決手段】発光素子は、陽極、陽極上の発光層、発光層上の電子輸送層、電子輸送層上に位置し、電子輸送層と接する第１の電子注入層、第１の電子注入層上に位置し、第１の電子注入層と接する第２の電子注入層、および第２の電子注入層上に位置し、第２の電子注入層と接する陰極を有する。電子輸送層は、ホール輸送性よりも電子輸送性の高い有機化合物を含み、さらにリチウム、８−キノリノール配位子を含むリチウム錯体、８−キノリノール配位子を含むマグネシウム錯体の少なくとも一つを含む。第１の電子注入層はリチウム、および８−キノリノール配位子を含むリチウム錯体の少なくとも一つを含む。第２の電子注入層はランタノイド金属を含む。【選択図】図１
Bibliography:Application Number: JP20170153912