Change the way of lighting, LED will be cheaper
Recently, at Kyushu University’s “Advanced Organic Optoelectronics Research Center” (OPERA), a “Hyperfluorescence” that uses only fluorescent materials but has a luminous efficiency of more than 90% has been developed. The effect is equivalent to the luminous efficiency of the rare metal “phosphorus”, but the cost is substantial. reduce.
Basically, the existing OLED light-emitting materials can be roughly classified into fluorescent and phosphorescent materials according to different light-emitting principles. The luminous efficiency of the fluorescent material is 25% at the maximum, and the phosphorescent material is 100%. However, the luminous efficiency of the new material when excited by light is as high as that of the phosphorescent material. According to Kyushu University professor Adachi Chinami, the director of OPERA, this is due to the phenomenon of "thermally active delayed fluorescence (TADF)" produced in the new material.
Don't think that OLED technology is almost monopolized by South Korea. In fact, high-end OLED technology is not only continuing to develop in Japan, academic institutions are also constantly improving OLED technology, hoping to achieve more energy-saving, lower cost and easier production processes.
While maintaining high-efficiency luminescence, the wide selection of luminous colors is also a major feature of this material. OPERA has produced organic EL panels with luminous colors such as blue, green, yellow-green, yellow and orange. The luminous efficiency of the yellow luminescent material when excited by light is only 26±1%, but the luminous efficiency of the green and yellow-green luminescent materials is 74-94%, and the luminous efficiency of the blue and orange luminescent materials is about 47%. Although this difference needs to be worked hard, Professor Anda of OPERA believes that once new materials are commercialized, phosphorus, a rare metal, is no longer needed. This will have a significant impact on organic OLED materials, and will have a greater impact on costs.
