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Method of screening for electron transport material and hole blocking material used in organic light emitting device

專利號(hào)
US11856809B2
公開日期
2023-12-26
申請(qǐng)人
LG CHEM, LTD.（KR Seoul）
發(fā)明人
Ji Hye Kim; Sung Kil Hong; Minseung Chun; Yeon Hwan Kim; Jae Tak Lee
IPC分類
H10K50/16; H10K71/70; H10K71/00; H10K85/60; H10K50/18; H10K101/50
技術(shù)領(lǐng)域
electron,transport,donating,emitting,material,hole,layer,blocking,organic,light
地域： Seoul

摘要

A method of screening for an electron transport material included in an electron transport layer of an organic light emitting device and a method of screening for a hole blocking material included in a hole blocking layer of the organic light emitting device, the method using a heterogeneous electron transfer rate constant (K) value to select the electron transport material and an electron donating rate constant kd to select the hole blocking material, thereby capable of realizing the organic light emitting device having an excellent balance between luminous efficiency and lifetime.

說(shuō)明書

  • L11 is halogen, or 8-hydroxyquinolinato substituted or unsubstituted with C1-4 alkyl; or halogen, or 10-hydroxybenzo[h]quinolinato substituted or unsubstituted with C1-4 alkyl,
  • L12 is halogen; phenolato substituted or unsubstituted with C1-4 alkyl; or naphtholato substituted or unsubstituted with C1-4 alkyl,
  • n1 is 1, 2, or 3,
  • n2 is 0 or 1, and
  • n1+n2 is 1, 2, or 3,
  • wherein when n1 is 2 or more, 2 or more of L11 are the same as or different from each other.

    • Alternatively, L11 is 8-hydroxyquinolinato, 2-methyl-8-hydroxyquinolinato, or 10-hydroxybenzo[h]quinolinato, and

      • L12 is chloro, o-cresolato, or 2-naphtholato.

    Most preferably, the metal complex compound is any one selected from the group consisting of 8-hydroxyquinolinato lithium (LiQ), bis(8-hydroxyquinolinato)zinc, bis(8-hydroxyquinolinato)copper, bis(8-hydroxyquinolinato)manganese, tris(8-hydroxyquinolinato)aluminum, tris(2-methyl-8-hydroxyquinolinato)aluminum, tris(8-hydroxyquinolinato)gallium, bis(10-hydroxybenzo[h]quinolinato)beryllium, bis(10-hydroxybenzo[h]quinolinato)zinc, bis(2-methyl-8-quinolinato)chlorogallium, bis(2-methyl-8-quinolinato)(o-cresolato)gallium, bis(2-methyl-8-quinolinato)(1-naphtholato)aluminum, and bis(2-methyl-8-quinolinato)(2-naphtholato)gallium.

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