White organic light-emitting diodes combining vacuum deposited blue electrophosphorescent devices with red surface color conversion layers

All non-dopant red–green–blue composing white organic light-emitting diodes

All non-dopant white organic light-emitting diodes (WOLEDs) have been realized by using solid state highly fluorescent red bis(4-(N-(1-naphthyl)phenylamino)phenyl)fumaronitrile (NPAFN) and amorphous bipolar blue light-emitting 2-(4-diphenylamino)phenyl-5-(4-triphenylsilyl)phenyl-1,3,4-oxadiazole (TPAOXD), together with well known green fluorophore tris(8-hydroxyquinolinato)aluminum (Alq3). The ...

Red Phosphorescent Organic Light-emitting Diodes

Phosphorescent organic light-emitting diodes (OLEDs) have the great advantage of highlyefficient emission compared with conventional fluorescent OLEDs. Pt(II) porphyrins are among the most promising saturated red phosphorescent dyes, yet tuning of their properties by making structural modifications has only been attempted on a modest scale, despite the large structuraldiversity of synthetic por...

Organic Light Emitting Diodes: Devices and applications

Opto-electronic devices using organic materials are becoming widely desirable for manifold reasons [1-4]. In fact, organic devices have the potential for cost advantages over inorganic devices. In addition, inherent properties of organic materials, such as their flexibility make them well suited for particular applications such as fabrication on a flexible substrate. The materials used in organ...

High-performance Single-unit and Stacked Inverted Top-emitting Electrophosphorescent Organic Light-emitting Diodes

Fabrication of blue top - emitting organic light - emitting devices with highly saturated color q

Blue top-emitting organic light-emitting devices (TOLEDs) with highly saturated color were developed by microcavity effect. The device structure studied was glass/reflective silver/indium-tin oxide (ITO)/organic electroluminescent stack/semi-transparent cathode (calcium/silver). By changing the thicknesses of ITO and organic layers in the microcavity structure device doped with p-bis(p-N, Ndi-p...