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Proceedings Paper

White light-emitting organic electroluminescent device based on a new orange organometallic iridium complexes
Author(s): Tien-shou Shieh; Heh-lung Huang; Pey-ching Liu; Mei-Rurng Tseng; Jia-Ming Liu
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Paper Abstract

We develop the white organic light-emitting diodes (WOLEDs) with a new orange electrophosphorescent emission, and the blue electrofluorescent or electrophosphorescent sensitizer. The new orange phosphorescent sensitizer is the thieno-pyridine framework organo-iridium complexes (PO-01). The blue phosphorsensitized electrofluorescent is 4,4'-Bis(9-ethyl-3-carbazovinylene)-1,1'- biphenyl (DSA) doped into 4,4'-Bis(2,2-diphenyl-ethen-1-yl) diphenyl (DPVBi). Beside, the blue phosphorescent sensitizer is Bis(3,5-difluoro-2-(2-pyridyl)phenyl- (2-carboxypyridyl)iridium (FirPic). The Device Type I of WOLED based on the PO-01 and the DSA doped into DPVBi has an efficiency of 5.7 lm/W (10.6Cd/A) at 500 Cd/m2, a CIE coordinates of (0.33, 0.31), and a CRI of 71. However, the Device Type II of WOLED has an efficiency of 5.5 lm/W (10.3Cd/A) at 500 Cd/m2 and a CIE coordinates of (0.30, 0.42), while the FirPic replaces the DPVBi doped with DSA. The spectra of the Device Type II and I both response insensitive to drive current. Nevertheless, the Device Type I relatively achieves a balanced whit emission with CIE coordinates of (0.33, 0.33). They are good suitability to use in OLED lighting and full-color LCD backlights.

Paper Details

Date Published: 19 November 2007
PDF: 7 pages
Proc. SPIE 6655, Organic Light Emitting Materials and Devices XI, 66551G (19 November 2007); doi: 10.1117/12.730429
Show Author Affiliations
Tien-shou Shieh, Industrial Technology Research Institute (Taiwan)
Heh-lung Huang, Industrial Technology Research Institute (Taiwan)
Pey-ching Liu, Industrial Technology Research Institute (Taiwan)
Mei-Rurng Tseng, Industrial Technology Research Institute (Taiwan)
Jia-Ming Liu, Industrial Technology Research Institute (Taiwan)

Published in SPIE Proceedings Vol. 6655:
Organic Light Emitting Materials and Devices XI
Zakya H. Kafafi; Franky So, Editor(s)

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