History of OLED development

With the development of high-tech, we have been in life can often see the shadow of OLED, and many people may know the existence of OLED, but the origin of OLED may be a lot of people do not know. Now, Xiaobian to give you universal about the history of the development of OLED.

In 1947, Hong Kong-born Chinese professor Deng Qingyun found in the laboratory organic light-emitting diode, which is OLED, which started the study of OLED, in 1987, Professor Deng Qingyun and Van Slyke using ultra-thin film Technology, using transparent conductive film as anode, Alq3 as light-emitting layer, triarylamine as hole transport layer, Mg / Ag alloy as cathode, made of double-layer organic electroluminescent device. In 1990, Burroughes et al. Discovered OLEDs with conjugated polymer PPV as a light-emitting layer, and the upsurge of OLED research has been around the world. Professor Deng is also known as "the father of OLED".

OLED in the two major technical system, low molecular OLED technology is mainly concentrated in Japan, South Korea, China Taiwan, the three regions, and polymer PLED mainly for the development of European manufacturers. In addition, before the LG mobile phone OEL is also the use of OLED technology. OLED technology and patents by the British technology company CDT master. Compared to the two major technical systems, PLED products are still difficult to color. While the low molecular OLED is easier to color.

However, although the future of better OLED technology will replace TFT and other LCD, but the organic light-emitting display technology there are still short life, large screen and other defects.

To illustrate the OLED structure, you can compare each OLED unit as a hamburger, the luminescent material is caught in the middle of the vegetables. Each OLED display unit can be controlled to produce three different colors of light. OLED and LCD, there are active and passive points. Passive mode by the ranks of the selected location of the unit active light. In the active mode, the OLED unit has a thin film transistor (TFT), and the light emitting unit is illuminated by the TFT driver. Active OLEDs are more power efficient than passive OLEDs and show better performance.

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