An electrophosphorescent organic light emitting concentrator

An electrophosphorescent organic light emitting concentrator

We demonstrate threefold directional light concentration from an organic light-emitting diode luminaire for use in spot lighting and other applications where high intensity illumination is required. The concentrating luminaire comprises four triangular, large-area green electrophosphorescent organic light emitting diodes (PHOLEDs) deposited on plastic substrates and assembled into a pyramidal s...

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

22.3: High Efficiency Electrophosphorescent Organic Light Emitting Diodes using Semitransparent Ag as Anode

We have significantly improved the emission efficiency in an organic light emitting diode (OLEDs) based on tris(phenyl pyridine)iridium [Ir(ppy)3]. Using a semitransparent Ag with surface modification as anode to replace conventional ITO, excellent light outcoupling and hole injection properties have been realized. The Ag based OLED exhibits a maximum current efficiency of 81 cd/A and power eff...

Efficient Red-Emitting Electrophosphorescent Polymers

We report the synthesis and characterization of a series of electrophosphorescent polymers with a polyfluorene backbone, containing a red-emitting iridium complex and carrier-transporting units as the substitutes of the C-9 position of fluorene. Different specimens and contents of the hole-transporting moieties were found to influence the electroluminescent properties of the polymers. Incorpora...

Organic light-emitting transistor technology

The organic light-emitting transistor (OLET) is an emerging optoelectronic device having the structure of a thin-film transistor and the capability of light generation [1]. Bright/multicolor OLETs may allow electroluminescent display fabrication with simpler driving circuits. Furthermore, the most advanced OLETs encompass a huge technological potential for the realization of intense nanoscale l...