OLEDs Made by OVPD

A first demonstration of phosphorescence-doped OVPD-OLEDs with identical VTE performance was achieved at Universal Display Corporation (UDC) and at TU Braunschweig [48] by use of PtOEP. The electroluminescence spectrum, with emission at 651.1 nm, and the structure of the device are shown in Fig. 9.10. The external quantum efficiency of this OVPD device reached 3.88% at 3.7 V forward potential (Fig. 9.11) this is identical to the external quantum efficiency of the nearly identical VTE device reported by Baldo and Forrest [49]. 

In 2005 Universal Display Corporation published OVPD results of an advanced 

These results for OLED display applications show that OVPD-deposited devices achieve at least the same performance as the VTE-based devices. Deposition rates are, furthermore, higher for OVPD and are suitable on the device level (Fig. 9.16). 

AIXTRON actively supports the research and development activity on OLEDs to improve their lifetime [51] and to explore and optimize the OVPD process in several 

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