The search functionality is under construction.
The search functionality is under construction.

Red EL Properties of OLED Having Hole Blocking Layer

Hyeong-Gweon KIM, Tatsuo MORI, Teruyoshi MIZUTANI, Duck-Chool LEE

  • Full Text Views

    0

  • Cite this

Summary :

In this study, we prepared red organic light- emitting-diode (OLED) with a fluorescent dye(Sq)-doped and inserted 1,3-bis (5-p-t-butylphenyl)-1,3,4-oxadiazol-2-yl) benzene (OXD7) or/and tris (8-hydroxyquinoline) aluminum (Alq3) layers between emission layer and cathode in order to increase electroluminescent (EL) efficiency. This inserting effect has been observed and EL mechanism characteristics have been examined. The hole transport layer was N,N'-diphenyl-N, N'bis-(3-methylphenyl)-1,1'diphenyl-4,4'-diamine (TPD); the host material of emission layer was Alq3; the guest material of emission layer was Sq. When Alq3 was inserted between the emission layer and the cathode, emission efficiency increased. Highly pure red emission, however, was not attaina ble with Alq3. On the other hand, the insertion of OXD7 between the two layers blocked and accumulated holes. Because of its increasing recombination probability of electron and hole, luminance characteristics and emission efficiency were improved with holding highly pure red color.

Publication
IEICE TRANSACTIONS on Electronics Vol.E83-C No.7 pp.1012-1016
Publication Date
2000/07/25
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Issue on Organic Molecular Electronics for the 21st Century)
Category
Electro Luminescence

Authors

Keyword