The research on OLED technology originated from Dr. Ching Wan Tang. He was born in Hong Kong and received a Bachelor of Science degree in Chemistry from the University of British Columbia and a PhD in Physical Chemistry from Cornell University in 1975. Deng Qingyun has joined Kodak's Rochester Laboratory for research work since 1975, and discovered OLED in an accident. One night in 1979, on his way home, he suddenly remembered that there was something he had forgotten in the laboratory. After returning to the laboratory, he found that an organic battery used for experiments was shining in the dark and started the research on OLED. . In 1987, Dr. Genyang Wang and his colleague Steven, both of Kodak Company, successfully used a double-layer organic structure similar to a semiconductor PN junction to create a low-voltage, high-efficiency light emitter for the first time, which laid the foundation for Kodak's production of OLED displays.了基。 The foundation. In 1990, the laboratory in Cambridge, England, had also successfully developed a polymer organic light-emitting element. CDT (Cambridge Display Technology), a display technology company established by Cambridge in 1992, led the research of OLED to a completely different R&D path from Kodak.
In 1997, OLED was first commercially produced in the world by the Japanese Pioneer Company and used in car audio. However, until 1999, the only market for OLED was car monitors. After 2000, applications were extended to mobile phones, PDAs (including electronic dictionaries, handheld computers and personal communication devices, etc.), cameras, handheld game consoles, and testing instruments. In 2009, major manufacturers began to shift their focus to AMOLED, resulting in AMOLED output value surpassing PMOLED for the first time. In 2013, LGD and SMD launched 55-inch OLED TVs. In 2017, Apple's 10th anniversary mobile phone iPhoneX uses AMOLED screens. Therefore, it took only 16 years for OLED to successfully launch a 55-inch TV screen from its first commercial application, while it took 32 years for LCD to go through this process. It can be seen that the global OLED industry is developing very rapidly.
From 1997 to 2001, the experimental stage of OLED. During this period OLED began to gradually out of the laboratory, mainly used in car audio panels, PDAs and mobile phones. However, the products are very limited and the product specifications are few. They are all passively driven, monochromatic or regional color, which are largely experimental and trial sales. In 2001, the global sales of OLEDs were only about 150 million U.S. dollars.
From 2002 to 2005, the growth stage of OLED. During this period, people began to gradually come into contact with more OLED products, such as car monitors, PDAs, mobile phones, digital cameras, DC, head-mounted displays, etc. However, small panels below 10 inches are mainly used, and panels above 10 inches have also been put into use.
After 2005, OLED began to move towards a mature stage.
Judging from the current industry situation, OLED has now passed its growth period. In recent years, OLED has gradually become popular in the field of electronic product display.
Monocrystalline silicon is an infrared material with excellent comprehensive cost performance. It can be divided into transmission grade and mirror grade. As a transmission grade material, optical grade Czochralski silicon (OCZ SI) is widely used in the mid infrared (1-6um) band, with an infrared transmittance of more than 50%. Zone fused monocrystalline silicon can be used in wider band (1-14um), and high-purity zone fused monocrystalline silicon (hpfz SI) can even be used in far-infrared band (greater than 30um).
Silicon single crystal is also an excellent laser mirror material. Compared with other mirror materials such as copper and molybdenum, silicon single crystal is the preferred substrate material for CO2 laser mirror because of its good thermal conductivity, excellent thermal stability, low coefficient of thermal expansion, relatively low density, low cost and easy precision processing.
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