HOLE TRANSPORTING MATERIAL, OLED DISPLAY PANEL AND ELECTRONIC DEVICE COMPRISING THE SAME

• US 20170301864A1
• Filed: 07/03/2017
• Published: 10/19/2017
• Est. Priority Date: 12/28/2016
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited, Wuhan Tianma Micro-Electronics Company Limited (Wuhan Donghu New Technology Development Zone Production Promotion Centre), Wuhan Tianma Microelectronics Company Limited Shanghai Branch
• Original Assignee: Shanghai Tianma AM-OLED Co. Ltd (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Inventors: WANG, Xiangcheng, HE, Wei, LIU, Ying, NIU, Jinghua, HAMADA, YUJI
• Granted Patent: US 10,446,758 B2
• Time in Patent Office: Days
• CPC Class Codes: C07C 211/54 having amino groups bound to two or three six-membered aromatic rings
• CPC Class Codes: H10K 2101/27 Combination of fluorescent and phosphorescent emission
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 50/171 Electron injection layers
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 71/30 Doping active layers, e.g. electron transporting layers
• CPC Class Codes: H10K 85/30 Coordination compounds
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/60 Organic compounds having low molecular weight H10K85/10 - H10K85/50 take precedence
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole

Abstract

The present invention relates to a hole transporting material having a structure of formula (I). (1) The present invention provides a hole transporting material having at least one benzene ring with non-hydrogen substituent(s) in the formula and being capable of obtaining a suitable mobility rate without occurrence of crosstalk between pixels. (2) The hole transporting material provided by the present invention is capable of satisfying the requirements on MASK cleaning in terms of solubility (NMP solvent).

Claims

1. A hole transporting material, characterized in that a hole transporting material has a structure of formula (I),

2. The hole transporting material claimed in claim 1, characterized in that L₁, L₂, L₃, L₄, L₅ and L₆ are each independently selected from the group consisting of

3. The hole transporting material claimed in claim 1, characterized in that L₇, L₈, L₉ and L₁₀ are each independently selected from the group consisting of

4. The hole transporting material claimed in claim 1, characterized in that -L₄-L₈ and -L₅-L₉ are the same, and -L₃-L₇ and -L₆-L₁₀ are the same.

5. The hole transporting material claimed in claim 1, characterized in that the hole transporting material comprises any one of the following structure:

6. The hole transporting material claimed in claim 1, characterized in that the hole transporting material has a hole mobility rate of 9×

10<sup>−

5</sup>−

5×

10<sup>−

4</sup> cm²/V.S, and a solubility in NMP of 10 g/L or more at 25°

C. .

7. A hole transporting layer, characterized in that the hole transporting layer comprises the hole transporting material claimed in claim 1.

8. The hole transporting layer claimed in claim 7, characterized in that the hole transporting layer has a thickness of 600-2300Å

.

9. The hole transporting layer claimed in claim 7, characterized in that the hole transporting layer is doped with a P-type organic material in the hole transporting material claimed in claim 1.

10. The hole transporting layer claimed in claim 9, characterized in that the p-type organic material has a doping ratio of 1 to 10 wt % in the hole transporting layer.

11. An OLED display panel, characterized in that the OLED display panel comprises a first electrode and a second electrode, wherein a laminate comprising a light emitting layer and a hole transporting layer is provided between the first electrode and the second electrode;

and the hole transporting layer comprises the hole transporting material claimed in claim 1, or the hole transporting layer is the hole transporting layer claimed in claim 7.

12. The OLED display panel claimed in claim 11, characterized in that the light emitting layer comprises anyone selected from the group consisting of a blue light emitting unit, a green light emitting unit and a red light emitting unit, or a combination of at least two selected therefrom.

13. The OLED display panel claimed in claim 11, characterized in that a blue light emitting unit, a green light emitting unit and a red light emitting unit have common hole transporting layer comprising the hole transporting material claimed in claim 1, or the common hole transporting layer is the hole transporting layer claimed in claim 7.

14. The OLED display panel claimed in claim 13, characterized in that the common hole transporting layer has a thickness of 600-1500Å

.

15. The OLED display panel claimed in claim 12, characterized in that the green light emitting unit and the red light emitting unit adopt a phosphorescent material;

and the blue light emitting unit uses a fluorescent material.

16. The OLED display panel claimed in claim 12, characterized in that the OLED display panel has a red light external quantum efficiency of 16% or more, a green light external quantum efficiency of 16% or more, and a blue light external quantum efficiency of 10% or more.

17. The OLED display panel claimed in claim 11, characterized in that the laminate further comprises at least one of a hole injection layer, an electron transporting layer, and an electron injection layer.

18. The OLED display panel claimed in claim 11, characterized in that the OLED display panel comprises in turn from bottom to top a first electrode, a hole injection layer, a hole transporting layer, a light emitting layer, an electron transporting layer, an electron injection layer, and a second electrode.

19. The OLED display panel claimed in claim 11, characterized in that the first electrode is an anode, and the second electrode is a cathode.