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HIGH EFFICIENCY WHITE ORGANIC LIGHT EMITTING DEVICES
Author(s) -
Ali T. A.,
Ghosh A. P.,
Howard W. E.
Publication year - 1999
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1834052
Subject(s) - oled , brightness , optoelectronics , luminous efficacy , materials science , layer (electronics) , fabrication , electroluminescence , dopant , optics , nanotechnology , doping , physics , medicine , alternative medicine , pathology
This paper reports the fabrication of a high efficiency and high brightness white Organic Light Emitting Device (OLED) based on evaporated small molecules. The luminous efficiency of the device is approximately 1.5 lumens/watt, which, to the best of our knowledge, is the highest reported efficiency in the literature. Brightness in excess of 1000 cd/m 2 is achieved at a voltage of 10V. The emitted white light, with CIE coordinates of x=0.33 and y=0.33, can be converted to red, green and blue sub‐pixels using color filters. The OLED device comprises an emission layer made of DPV type host with a single fluorescent dopant. The emission layer is sandwiched between a hole transport layer and an electron transport layer (Alq 3 ).
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