Should support O/PLED industry chain technology development

Zhao Wei, director of Shaanxi flat panel display technology Engineering Research Center, made a report on the new progress of PLED display technology and Industry Outlook in the 2007 China flat panel display technology summit.

Zhao Wei said, PLED/OLED is an organic semiconductor light-emitting materials in the current driven light and display technology, in accordance with the use of organic materials are divided into PLED and OLED. PLED/OLED display process easier than LCD. TFT-LCD process to go through 200 procedures, OLED reduced to 80 channels, and the PLED display method can use inkjet printing roll printing, more simple than OLED production process, and lower production cost, higher production efficiency, especially in the manufacture of PLED large screen high definition TV has obvious advantages, is considered flat panel display technology in the future.

Of course, PLED display technology is also facing a lot of problems in the process of industrialization: one is the life, the life of PLED luminescence near 10 thousand hours, far lower than CRT and LCD for 25 thousand hours; the two is the process in question, under the current conditions, the organic film PLED display device fabricated using multilayer structure miscible organic film, stage and red green and blue light emitting materials with different cathode materials and other technical problems increased the complexity of the production process of PLED in the membrane preparation process; the three is the cost problem, because the technology is not mature enough, the Cheng Zhongliang product production rate is low, and the PLED products do not realize the industrialization, standardization of raw materials production equipment, low price, expensive, high cost of products.

He said that the emergence of the problem means that the existence of opportunities, in response to these problems, PLED industry researchers are constantly exploring ways to solve. In 1995, Professor Cao Yong and Professor A.J.Heeger developed the polymer-LEC technology, the application of this technology makes the device with a single layer organic film structure, low driving voltage, high luminous efficiency, at the same time, the PLED/OLED device of organic film thickness and uniformity requirements are not so strict traditional. The only drawback is that LEC technology makes the device response slower. Display Technology Engineering Research Center Based on LEC tablet in Shaanxi Province, the comprehensive advantages of PLED and LEC technology, by using inorganic salt doping method, while maintaining the advantages of LEC technology at the same time, improve the response speed of the device.

Zhao Wei believes that the development of the PLED industry to Chinese only rely on enterprises and scientific research institutes is not enough, also need the relevant government departments to strengthen efforts to support industrial development from the aspects of policy, capital, technology and talents, strengthen the resource integration of basic research, industry standards, and provide strategic guidance in the form the development of domestic and international characteristics of regional market development, support the development of the core technology, to support the development of key technology of the industrial chain, especially the development of organic electroluminescent materials, driving circuit.

The industrialization of PLED should start with the small and medium-sized panel products, because the technical problems of small and medium-sized products are relatively easy to solve. With the development of the research and development work, it is the only way to realize the industrialization of PLED by using the PLED product of monochrome panel as the breakthrough point, from easy to difficult.

Source: China Electronics News