Organic electroluminescent element, manufacturing method for same, and light emission method
AssigneeSharp Kabushiki Kaisha
InventorsYuto TSUKAMOTO, Katsuhiro KIKUCHI, Hideki UCHIDA, Eiji KOIKE, Satoshi INOUE, Masanori OHARA, Kazuki MATSUNAGA
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Abstract
The organic EL element (10) at least includes, between a first electrode (2) and a second electrode (4), at least one layer of an exciton generating layer (33) which contains at least one type of TADF material as a host material and at least one layer of a fluorescent emission layer (34) which contains at least one type of fluorescent emission material.
Claims22
An organic electroluminescent element at least comprising:
- at least one layer of an exciton generating layer containing at least one type of thermally activated delayed fluorescent material as a host material;
- and
- at least one layer of a fluorescent emission layer containing at least one type of fluorescent emission material,
- the exciton generating layer and the fluorescent emission layer being provided between an anode and a cathode.
A method for manufacturing an organic electroluminescent element, said method comprising the step of:
- forming an organic layer between an anode and a cathode,
- the step of forming the organic layer including:
- forming an exciton generating layer which contains at least one type of thermally activated delayed fluorescent material as a host material, and
- forming a fluorescent emission layer which contains at least one type of fluorescent emission material.
A light emission method, wherein:
- light emission is caused by transferring excitons, which have been generated in an exciton generating layer containing a thermally activated delayed fluorescent material, to a fluorescent emission material in a fluorescent emission layer by Forster transition, the fluorescent emission layer being provided separately from the exciton generating layer.
Dependencies are inferred from the claim text.