OVPD coating technology for the processing of efficient and long-lived OLED luminaires

TL;DRAbstract

Within the last few years solid state lighting (SSL) based on inorganic light emitting diodes (LED) is a highly efficient source of white light compared to traditional incandescent lamps. Currently, organic LED (OLED) are a developing competitor to inorganic LED in SSL. In contrast to inorganic LED, OLED are large area light sources, which could open up new applications. Flexible substrates or even complete transparency is possible. However, presently, efficiency, lifetime and cost of production are not competitive compared to inorganic LED. Commonly, small organic molecules are deposited under high vacuum conditions (vacuum thermal evaporation (VTE)). In contrast to VTE, this work investigates an alternative deposition technique (organic vapor phase deposition (OVPD)). The goal of this work is to generate new insights into the active organic layers of OLED by utilizing OVPD-specific deposition properties and to develop a competitive white OVPD-OLED. To begin, the long-term and tempera

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