The present invention provides a novel light emitting element. Or, provided is a light emitting element having a good lifespan. Or, provided is a light emitting element having good light emitting efficiency. Provided is a light emitting element in which a light emitting layer, a first electron transport layer, and a second electron transport layer contact to be provided in this order, wherein the light emitting layer has an EL layer between one pair of electrodes and includes at least a fluorescent emitting material and a host material in the EL layer, the first electron transport layer includes a first electron transport material, and the second electron transport layer includes a second electron transport material. LUMO levels of the host material and the second electron transport material are higher than an LUMO level of the first electron transport material.

    본 발명은 신규 발광 소자를 제공한다. 또는, 수명이 양호한 발광 소자를 제공한다. 또는, 발광 효율이 양호한 발광 소자를 제공한다. 한 쌍의 전극 사이에 EL층을 갖고, EL층에는 적어도, 형광 발광 물질과 호스트 재료를 포함하는 발광층과, 제 1 전자 수송 재료를 포함하는 제 1 전자 수송층과, 제 2 전자 수송 재료를 포함하는 제 2 전자 수송층이 이 순서대로 접촉하여 제공되고, 호스트 재료와 제 2 전자 수송 재료의 LUMO 준위가 제 1 전자 수송 재료의 LUMO 준위보다 높은 발광 소자를 제공한다.


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    Title :

    LIGHT-EMITTING ELEMENT LIGHT-EMITTING DEVICE ELECTRONIC DEVICE AND LIGHTING DEVICE


    Additional title:

    발광 소자, 발광 장치, 전자 기기 및 조명 장치


    Contributors:

    Publication date :

    2024-01-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    H10K



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