Title:
HOST MATERIAL FOR LUMINOUS LAYER AND LUMINOUS DEVICE
Document Type and Number:
Japanese Patent JP2019069943
Kind Code:
A
Abstract:
To provide a long-life luminous element.SOLUTION: The luminous element has at least a laminated structure in which a first layer 111, a second layer 112, and a luminous layer 121 are laminated sequentially from an anode 101 side between the anode and a cathode 102. The first layer includes a first organic compound and an electron-accepting compound. The second layer includes a second organic compound having a HOMO level differing from the HOMO level of the first organic compound by ±0.2 eV. The luminous layer includes a third organic compound having a HOMO level differing from the HOMO level of the second organic compound by ±0.2 eV, and a luminous substance having a hole-trapping property with respect to the third organic compound.SELECTED DRAWING: Figure 1
Inventors:
SEO TETSUSHI
SUZUKI TSUNENORI
SHIMOGAKI TOMOKO
SUZUKI TSUNENORI
SHIMOGAKI TOMOKO
Application Number:
JP2018210441A
Publication Date:
May 09, 2019
Filing Date:
November 08, 2018
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB CO LTD
International Classes:
C07D307/91; C09K11/06; H01L51/50
Domestic Patent References:
| JP2008294404A | 2008-12-04 |
Foreign References:
| WO2008143229A1 | 2008-11-27 | |||
| WO2005117500A1 | 2005-12-08 | |||
| WO2005113531A1 | 2005-12-01 |
Other References:
TIANHANG ZHENG AND WALLACE C H CHOY: "High-efficiency blue fluorescent organic light emitting devices based on double emission layers", J.PHYS.D:APPL.PHYS., vol. 41, JPN7019000188, 2008, pages 055103, ISSN: 0003962164