Deep blue, efficient, moderate microcavity organic light-emitting diodes

Cited 28 time in webofscience Cited 0 time in scopus
  • Hit : 211
  • Download : 445
Two types of microcavity blue organic light-emitting diodes (OLEDs) with a dielectric Bragg mirror (two different center wavelengths, type-A approximate to 465, type-B approximate to 470 nm) were designed to achieve the color coordinates of NTSC blue standard and enhance the quantum efficiency in the normal direction. A moderate microcavity OLED was defined as a microcavity OLED with a single pair of TiO(2)/SiO(2) high/low dielectric layers inserted between an indium tin oxide (ITO) layer and a glass substrate. The moderate microcavity blue OLED doped with 9,10-bis(3',5'-diphenylphenyl)-10-(3"',5"'-diphenylbiphenyl-4 ''-yl)anthracene (TAT) exhibited excellent color coordinates (type-A; x=0.143, y=0.068, type-B; x=0.139, y=0.081), which were better than the color coordinates of the NTSC standard (0.140, 0.080) and the TAT-doped conventional noncavity OLED (0.156, 0.094). There were approximately 60% and 54% improvement in the relative quantum efficiency of the type-B TAT-doped moderate microcavity OLED, respectively, compared to those of the conventional noncavity reference OLED (ITO = 150 nm) and other reference type-II with an identical ITO layer thickness (ITO = 85 nm). These improvements in color coordinates and the relative quantum efficiency were attributed to the optimization of narrowed spectrum bandwidth and enhanced integrated spectrum intensity in the TAT-doped blue OLED, resulting from the effective microcavity effect. (C) 2009 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2010-01
Language
English
Article Type
Article
Keywords

HIGHLY EFFICIENT; ELECTROLUMINESCENT PROPERTIES; DEVICES; EMISSION; MOLECULES; TRANSPORT; OLEDS; LAYER; RED

Citation

ORGANIC ELECTRONICS, v.11, pp.137 - 145

ISSN
1566-1199
DOI
10.1016/j.orgel.2009.10.011
URI
http://hdl.handle.net/10203/20100
Appears in Collection
PH-Journal Papers(저널논문)
Files in This Item
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 28 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0