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According to the Nikkei BP News Agency, Matsushita Electric Works has produced an organic EL lighting panel made by some organic semiconductors using printing methods. Both luminous efficiency and color performance have obtained high values. This was learned in the company's speech at the "Printable Electronics 2009" seminar held on February 18-20, 2009.
The luminous efficiency of the organic EL illumination panel is 40 lm/W, which indicates the index of color expression--CRI (ColorRendering Index) is 95, the external quantum efficiency is 36.1%, and the luminance is reduced by half at the initial luminance of 1000 cd/m2. More than 10,000 hours.
In the manufacturing process, a semiconductor called a hole injection layer is formed by a printing method called "Slit Coating". "Exactly the material of this layer is also suitable for coating while having excellent performance" (Panasonic Electric Works). The slit coating method is a technique employed in manufacturing a color filter of a liquid crystal panel. Panasonic Electric Works will retrofit the equipment provided by TAZMO, which cooperates with the development of organic EL lighting technology, to make it suitable for organic EL applications. "When the slit coating method is used, the film thickness is 40 to 50 nm. The film thickness uniformity is ±5%, and the coating speed is 100 mm/s" (Panasonic Electric Works).
The luminous efficiency of 40 lm/W achieved this time is equivalent to the actual luminous efficiency of fluorescent lamps (Panasonic Electric Works). This is because although the luminous efficiency of the fluorescent lamp light-emitting portion is 80 to 100 lm/W, the use of a lamp cover for diffusing light and a reflector having a low reflectance can reduce the actual efficiency to 1/2 or less.
In terms of luminous efficiency alone, several manufacturers have achieved higher values. For example, U.S. Universal Display Technology (UDC) has reached 102 lm/W. However, the company’s panel has a CRI value of only 70. Unlike Matsushita Electric, the company has always attached great importance to color expression as a condition for using organic EL for lighting. The degree of excellence. "If the color is low, the strawberry will look like it is rotten." 
Matsushita Electric Works prototyped a new OLED lighting panel
Core Tip: Matsushita Electric Works has produced an organic EL lighting panel made by some organic semiconductors using printing methods. Both luminous efficiency and color performance have obtained high values. This is the "Printable Electronic Technology 2009" (Printable Electre Panasonic) has produced some organic EL lighting panels made by printing methods. The luminous efficiency and color performance have been obtained. Higher values. This was learned in the company's presentation at the "Printable Electronics 2009" seminar held on February 18-20, 2009.