Panasonic Electric Works Co Ltd prototyped an Oled lighting Panel, part of whose organic semiconductors were made by printing processes.

The panel has high luminance efficiency and color rendering properties, according to the company. It was introduced in a speech delivered by the company at Printable Electronics 2009, which took place from Feb 18 to 20, 2009.

This organic EL lighting panel features a luminance efficiency of 40lm/W and a CRI (color rendering index) value of 95. The external quantum efficiency is 36.1%, and the half-life of the luminance exceeds 20,000 hours when the initial luminance is 1,000cd/m2, according to Panasonic.

Among the manufacturing processes used, the semiconductor called hole-injecting layer was manufactured by the "slit coating method," a kind of printing methods. This method was employed because "a good material for the hole-injecting layer happened to be suitable for use with a coating method," the company said.
TechON