LIGHT-EMITTING ELEMENT, METHOD FOR MANUFACTURING SAME, AND LIGHT EMISSION METHOD

An organic EL element (10) includes a first light-emitting layer (33a) having the shortest emission peak wavelength of a light-emitting layer (33) and containing a host material and a TTF material or at least the TTF material, a second light-emitting layer (33b) containing at least a TADF material,...

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Main Authors KIKUCHI, Katsuhiro, TSUKAMOTO, Yuto, KAWATO, Shinichi, KOIKE, Eiji, ITO, Asae, NIBOSHI, Manabu
Format Patent
LanguageEnglish
Published 08.11.2018
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Summary:An organic EL element (10) includes a first light-emitting layer (33a) having the shortest emission peak wavelength of a light-emitting layer (33) and containing a host material and a TTF material or at least the TTF material, a second light-emitting layer (33b) containing at least a TADF material, a third light-emitting layer (33c) having the longest emission peak wavelength of the light-emitting layer (33) and containing at least fluorescent material. The excited triplet level of the TTF material is lower than the excited triplet level of the TADF material.
Bibliography:Application Number: US201615773182