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    ELECTROLUMINESCENT DEVICE, AND DISPLAY DEVICE COMPRISING THEREOF
    31.
    发明申请
    ELECTROLUMINESCENT DEVICE, AND DISPLAY DEVICE COMPRISING THEREOF 有权

    公开(公告)号：US20220399516A1

    公开(公告)日：2022-12-15

    申请号：US17892564

    申请日：2022-08-22

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Sujin PARK ,  Yuho WON ,  Eun Joo JANG ,  Dae Young CHUNG ,  Sung Woo KIM ,  Jin A KIM ,  Yong Seok HAN

    IPC: H01L51/50 ,  H01L51/00

    Abstract: An electroluminescent device includes a first electrode and a second electrode facing each other; a hole transport layer between the first electrode and the second electrode; a light emitting layer including a first light emitting layer disposed between the hole transport layer and the second electrode and including a first quantum dot and a second light emitting layer between the first light emitting layer and the second electrode and including a second quantum dot; and an electron transport layer between the light emitting layer and the second electrode. Each of the first and second light emitting layers emits first light, hole transport capability per unit area and electron transport capability per unit area of the first quantum dot are greater than hole transport capability per unit area and electron transport capability per unit area of the second quantum dot, respectively.

    QUANTUM DOT DEVICE AND ELECTRONIC DEVICE
    33.
    发明申请
    QUANTUM DOT DEVICE AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20220310956A1

    公开(公告)日：2022-09-29

    申请号：US17495162

    申请日：2021-10-06

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Dae-Hee LEE ,  Yeonkyung LEE ,  Tae Hyung KIM ,  Heejae LEE ,  Eun Joo JANG ,  Dae Young CHUNG ,  Soonmin CHA

    IPC: H01L51/50

    Abstract: A quantum dot quantum dot device includes a first electrode and a second electrode, a light emitting layer disposed between the first electrode and the second electrode and including quantum dots, and a first hole auxiliary layer between the first electrode and the light emitting layer, wherein the first hole auxiliary layer includes a first hole auxiliary material and a second hole auxiliary material having a greater bandgap energy than a bandgap energy of the first hole auxiliary material, a difference between a HOMO energy level of the second hole auxiliary material and a HOMO energy level of the first hole auxiliary material is about 0.1 eV and less than about 0.8 eV, and a difference between a LUMO energy level of the second hole auxiliary material and a LUMO energy level of the first hole auxiliary material is greater than or equal to about 0.3 eV.

    LIGHT EMITTING DEVICE AND DISPLAY DEVICE INCLUDING THE SAME
    34.
    发明申请
    LIGHT EMITTING DEVICE AND DISPLAY DEVICE INCLUDING THE SAME 有权

    公开(公告)号：US20220190298A1

    公开(公告)日：2022-06-16

    申请号：US17688201

    申请日：2022-03-07

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Moon Gyu HAN ,  Kwanghee KIM ,  Heejae LEE ,  Eun Joo JANG ,  Dae Young CHUNG

    IPC: H01L51/52 ,  C09K11/88 ,  H01L51/00 ,  H01L51/50

    Abstract: Provided are a light emitting device includes a first electrode and a second electrode facing each other; an emissive layer disposed between the first electrode and the second electrode and a display device including the same. The emissive layer comprises: a first emission layer disposed on the first electrode and having a hole transporting property; a second emission layer and a third emission layer disposed on the first emission layer; wherein the second emission layer comprises an organic compound having a bipolar transport property and the third emission layer has a composition different from the first emission layer and the second emission layer; wherein the first emission layer, the second emission layer, and the third emission layer comprises a plurality of quantum dots, and wherein the first emission layer, the second emission layer, and the third emission layer are configured to emit light of a same color.

    LIGHT EMITTING DEVICE AND DISPLAY DEVICE INCLUDING THE SAME
    35.
    发明申请
    LIGHT EMITTING DEVICE AND DISPLAY DEVICE INCLUDING THE SAME 有权

    公开(公告)号：US20220173342A1

    公开(公告)日：2022-06-02

    申请号：US17671970

    申请日：2022-02-15

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Dae Young CHUNG ,  Kwanghee KIM ,  Eun Joo JANG ,  Tae Hyung KIM ,  Hongkyu SEO ,  Heejae LEE ,  Jaejun CHANG

    IPC: H01L51/50 ,  H01L51/00 ,  H01L51/56

    Abstract: A light emitting device including a first electrode and a second electrode, and an emission layer disposed between the first electrode and the second electrode and including quantum dots, a first charge auxiliary layer disposed between the emission layer and the first electrode, and a second charge auxiliary layer disposed between the emission layer and the second electrode, wherein the emission layer comprises a first emission layer contacting the first charge auxiliary layer, a second emission layer disposed on the first emission layer, and a third emission layer disposed on the second emission layer. The hole mobility of the first emission layer decreases sequentially from the first emission layer to the third emission layer.

    LIGHT EMITTING DEVICE AND DISPLAY DEVICE INCLUDING THE SAME
    38.
    发明申请
    LIGHT EMITTING DEVICE AND DISPLAY DEVICE INCLUDING THE SAME 审中-公开

    公开(公告)号：US20200313106A1

    公开(公告)日：2020-10-01

    申请号：US16832004

    申请日：2020-03-27

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Kwanghee KIM ,  Dae Young CHUNG ,  Tae Hyung KIM ,  Eun Joo JANG ,  Moon Gyu HAN

    IPC: H01L51/50 ,  H01L51/00 ,  H01L51/56

    Abstract: An electroluminescent device including a first electrode and a second electrode facing each other, and a quantum dot emission layer disposed between the first electrode and the second electrode and a method of manufacturing the same. The quantum dot emission layer does not include cadmium and lead, the quantum dot emission layer includes a first layer including first quantum dots, facing the first electrode, a second layer including second quantum dots, facing the second electrode, and a third layer including third quantum dots, disposed between the first layer and the second layer, wherein a highest occupied molecular orbital energy level of the third layer is less than a highest occupied molecular orbital energy level of the layer and the highest occupied molecular orbital energy level of the third layer is less than a highest occupied molecular orbital energy level of the second layer.

    ELECTROLUMINESCENT DEVICE, AND DISPLAY DEVICE COMPRISING THEREOF
    40.
    发明申请
    ELECTROLUMINESCENT DEVICE, AND DISPLAY DEVICE COMPRISING THEREOF 审中-公开

    公开(公告)号：US20190326539A1

    公开(公告)日：2019-10-24

    申请号：US16356148

    申请日：2019-03-18

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Dae Young CHUNG ,  Moon Gyu HAN ,  Oul CHO ,  Tae Hyung KIM ,  Sujin PARK ,  Hongkyu SEO ,  Eun Joo JANG

    IPC: H01L51/50 ,  H01L27/32 ,  H01L51/00 ,  H01L51/56

    Abstract: An electroluminescent device including a first electrode, a hole transport layer disposed on the first electrode, a first emission layer disposed on the hole transport layer, the first emission layer including a first light emitting particle on which a first ligand having a hole transporting property is attached, a second emission layer disposed on the first emission layer, the second emission layer including a second light emitting particle on which a second ligand having an electron transporting property is attached, an electron transport layer disposed on the second emission layer, and a second electrode disposed on the electron transport layer, wherein a solubility of the first ligand in a solvent is different than a solubility of the second ligand in the solvent and a display device including the same.

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