Cristina Tanase

53.4: Ultra-Thin Flexible OLED Device

A new method of making ultra-thin flexible organic light emitting diodes (OLEDs) using standard OLED fabrication facilities is reported. Through use of the Electronics on Plastic by Laser Release (EPLaR) technology, we have developed and demonstrated 18-μm thick single-pixel OLEDs. In this paper, besides describing the fabrication method, the electrical and optical performance of the flexible OLEDs is reported.

Thin Film Encapsulated Transparent Organic Light Emitting Diodes

Highly transparent OLEDs are very attractive for lighting and light beautification applications. While the transparent anode is based on transparent ITO, the transparent cathode is based on a 3-layer approach: (semi)transparent electron injection layer that is a low work function metal, electrically transparent conductor used in order to limit the voltage drop across the OLED area, and overcoat to tune the optical properties without influencing the electrical properties. Transparent encapsulation based on thin film technology is used in order to protect devices from ambient exposure. Using this approach large area (50 cm 2 ) transparent organic light-emitting device having 75% transparency in the off state is demonstrated. The efficiency of the transparent OLED is comparable with that of bottom emission OLED. It is demonstrated that by tuning the thickness and optical properties of both the cathode and the encapsulation the amount of light emitted through the anode and the cathode can be varied while the total amount of light emitted by the OLED remains the same. Moreover device optimization based on optical thin film calculations has been performed such that no angular dependence of emitted light is present both on anode and cathode side.

Optimization of the efficacy and angle dependence of emission of top-emissive organic light-emitting diodes on metal foils

top-emissive organic light-emitting diodes flexible organic light-emitting diodes microcavity metal foil stainless steel foil roughness transparent cathode thin film encapsulation lighting signage

P-169: Single Side Emitting Transparent OLED Lamp

Transparent OLEDs offer great potential for novel applications. Preferably, the light should be emitted from one side only. This can be done to some extent by modifying electrode thicknesses, but at the cost of reduced transparency. Here, we demonstrate a new approach to make single side emissive OLEDs while maintaining good transparency.