ORGANIC LIGHT EMITTING DIODE
    16.
    发明申请

    公开(公告)号:US20210159418A1

    公开(公告)日:2021-05-27

    申请号:US16923047

    申请日:2020-07-07

    Abstract: An organic light emitting diode includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer which is directly disposed on the lower portion of the emission layer and has a first refractive index, and a second hole transport layer which is disposed on the lower portion of the first hole transport layer and has a second refractive index, thereby exhibiting an improved luminous efficiency characteristic.

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