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 <i>Device Type I</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/m<sup>2</sup>, a CIE coordinates of (0.33, 0.31), and a CRI of 71. However, the <i>Device Type II</i> of WOLED has an efficiency of 5.5 lm/W (10.3Cd/A) at 500 Cd/m<sup>2</sup> and a CIE coordinates of (0.30, 0.42), while the FirPic replaces the DPVBi doped with DSA. The spectra of the <i>Device Type II and I</i> both response insensitive to drive current. Nevertheless, the <i>Device Type I</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.