White light emission

M. Granstrom and O. Inganas, White light emission from a polymer blend light emitting diode, Appl. Phys. Lett., 68 147-149, 1996. 

B.W. D Andrade, J. Brooks, V. Adamovich, M.E. Thompson, and S.R. Forrest, White light emission using triplet excimers in electrophorescent organic light-emitting devices, Adv. Mater., 14 1032-1036 (2002). 

In the vapor-deposited OLED community, a number of approaches have been employed to produce white light emission. White OLEDs have been demonstrated based on multilayer structures, e.g., stacked backlights [153,168], multidoping of single-layer structures [145], phosphorescent monomer-excimer emission layers [169] and on doping of phosphorescent materials into separate bands within the emission zone, called a tri-junction [170]. The trijunction device has produced the highest white OLED efficiency of 16% external quantum efficiency demonstrated thus far [171]. 

White Light Emission from Organic LEDs... 

One of the concepts used to produce white light emission in OLEDs is based on the energy transfer mechanism from host molecule to guest molecule. The energy transfer in... 

Yanes et al., 2007). Using complex core/shell structures, DiMaio et al. detected the white light emissions from single species of NPs doped with multiple trivalent rare earths (Eu +, Tb +, and Tm " ") (DiMaio et al., 2006). 

Hong, Z.R., Li, W.L., Zhao, D.X., et al. (2000) White light emission from OEL devices based on organic dysprosium-complex. Synthetic Metals, 111-112, 43-45. 

According to colorimetry, the coordinates of a color, which is produced by the mixture of two colors, can be found on the connecting line between the coordinates of the two colors in the CIE graph. A mixture of the m-LPPP and PPDB emission colors therefore can produce white-light emission near the equienergy white point (x = 1/3, y = 1/3) (see Fig. 8.21). 

Introducing red-light emitting Ir(III) complex and BT into the main-chain of polyfluorene (polymer 23) can realize white-light emission. A WPLED with a structure of ITO/PEDOT PSS/PVK/polymer 23/CsF/Al showed a maximum external quantum efficiency of 3.7% and the maximum luminous efficiency of 3.9 cd/A at the current density of 1.6 mA/cm2 with the CIE coordinates of (0.33, 0.34). The maximum luminance of 4180 cd/m2 is achieved at the current density of 268 mA/cm2 with the CIE coordinates of (0.31,... 

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