Roll-to-roll fabrication high efficient organic devices of flexible substrates

The Roll-to-Roll (production of highly efficient organic devices on flexible substrates) project aimed to develop new technologies for efficient and affordable flexible OLEDs. The project was successfully concluded. The 2.5-years project was funded (€11 million) by the Federal Ministry for Education and Research Germany (BMBF). The partners in the project include Novaled, Fraunhofer IPMS, COMEDD, Tridonic Dresden, CreaPhys, Heliatek, Von Ardenne Conditioning and Laytek.


Red, Green, Blue

The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors. Each pixel on the screen is built by driving three small and very close but still separated RGB light sources. At common viewing distance, the separate sources are indistinguishable, which tricks the eye to see a given solid color. All the pixels together arranged in the rectangular screen surface conforms the color image.


RGB White

RGB White is a display technology that uses four subpixels (red, green, blue and white). In a regular RGB display, white is produced by illuminating R, G and B subpixels at their highest intensity; however, the color filters diminish some of the light. RGBW produces a brighter white because the white subpixel is not filtered. 


Root Mean Square

Is a value for the roughness of a surface.

Roll-to-Roll processes

Roll-to-Roll process is used for graphics publishing. This printing process allows fast processing on large substrates at low costs. In recent years there are strong efforts to establish this processing for organic electronics such as thin-film transistor, memories, OLEDs, and in particular solar cells. 


Room Temperature

A colloquial expression for the typical or preferred indoor temperature to which people are generally accustomed (approximately 22 °C).