Conference Program - LOPE-C 2011

SCIENTIFIC CONF. | THURSDAY-JUNE 30, 2011
Track 5
Novel Process Concepts (04:30 pm - 06:00 pm) | LOCATION HARMONIE E / LEVEL C2
05:20 pm Roll-to-Roll process concepts for general OLED lighting
Dr Stefan Mogck,
Fraunhofer Institute of Photonic Microsystems, Germany
OLED lighting on glass substrates has been successfully started the market entry. A novel approach has been started to develop high efficient small molecule OLED stack
deposition on flexible webs in a roll-to-roll process as a major cost reducing step. Low cost metal foil as a substrate for the OLED device will allow significant cost reduction,
will open up new degrees of freedom in design leading and will be competitive for general signage and lighting applications. Metal foils as a substrate for the deposition of
organic light-emitting diodes with the doped charge transport layers, the so called p-i-n OLED technology, will allow a direct OLED deposition on the substrate with low
operating voltage. Within the ?Center of Organic Materials and Electronic Devices Dresden? (COMEDD) of Fraunhofer IPMS a roll-to-roll line for research and development
for OLED lighting is currently going into operation. The roll-to-roll line consists of a vacuum coater for small molecule depositions, a roll-to-roll encapsulation under inert
atmosphere and an optical inspection system for defect analysis.
In this talk we will highlight the roll-to-roll OLED fabrication concepts and results from substrate patterning to the encapsulation process. Especially, the challenging inert
transfer between the vacuum deposition and encapsulation process will be presented. Additionally, first results of roll-to-roll defect monitoring to control the roll-to-roll line
will be outlined. The defect prevention is essential for the device performance to avoid electrical shorts and reduced luminous efficacy.
page 110