Disclosed is a light emitting element. A light emitting layer includes a host compound (H-1) and a dopant compound (D), and an intermediate layer includes a first buffer layer including a first electron-transporting compound (ET-1), a second electron-transporting compound (ET-2), and an electron transporting layer including a third electron-transporting compound (ET-3). An absolute value of the lowest unoccupied molecular orbital (LUMO) energy of the first electron-transporting compound (ET-1) is smaller than an absolute value of the LUMO energy of the host compound (H-1). An absolute value of the LUMO energy of the second electron-transporting compound (ET-2) is smaller than an absolute value of the LUMO energy of the third electron-transporting compound (ET-3). An absolute value of the LUMO energy of the second electron-transport compound (ET-2) is smaller than an absolute value of the LUMO energy of the first electron-transporting compound (ET-1). Therefore, the present invention is capable of improving efficiency and lifespan in comparison to existing technology.

    발광층이 호스트 화합물(H-1) 및 도펀트 화합물(D)을 포함하고, 중간층이 제1전자 수송성 화합물(ET-1)을 포함하는 제1버퍼층, 제2전자 수송성 화합물(ET-2)을 포함하는 제2버퍼층 및 제3전자 수송성 화합물(ET-3)을 포함하는 전자 수송층을 포함하고, 상기 제1전자 수송성 화합물(ET-1)의 LUMO(lowest unoccupied molecular orbital) 에너지의 절대값이 상기 호스트 화합물(H-1)의 LUMO 에너지의 절대값보다 작고, 상기 제2전자 수송성 화합물(ET-2)의 LUMO 에너지의 절대값이 상기 제3전자 수송성 화합물(ET-3)의 LUMO 에너지의 절대값보다 작고, 상기 제2전자 수송성 화합물(ET-2)의 LUMO 에너지의 절대값이 상기 제1전자 수송성 화합물(ET-1)의 LUMO 에너지의 절대값보다 작은, 발광 소자가 개시된다.


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    Titel :

    Light emitting device and electronic apparatus comprising same


    Weitere Titelangaben:

    발광 소자 및 이를 포함하는 전자 장치


    Beteiligte:
    PARK HEUNG SU (Autor:in) / KANG NAM SU (Autor:in) / LEE SONG EUN (Autor:in) / LEE JONG WON (Autor:in) / LEE HYUN SHIK (Autor:in) / HAN WON SUK (Autor:in)

    Erscheinungsdatum :

    17.02.2023


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    H10K



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