The hottest new organic light emitting diodes in C

China's new organic light-emitting diodes have broad application prospects

the new organic light-emitting diodes developed in China have broad application prospects

the latest issue of the American Journal of Applied Physics published a new research achievement from Chinese researchers - a laminated organic light-emitting diode developed by scientists at the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences with low manufacturing cost and high luminous efficiency

organic light emitting diode (OLED) is a kind of thin film light emitting diode (LED), and its emission layer is an organic compound. Compared with traditional LED, the processing cost of these devices is much lower. They can be used as TV screens, computer displays, portable displays that can take advantage of opportunities to obtain development systems, and lighting devices. Compared with traditional LCD display, one of the biggest advantages of OLED display is that it does not need backlight, which means that it requires less current, and it can work longer with the same battery. It can be widely used in small portable devices. Most of these devices use monochrome, low resolution display screens to reduce power consumption

organic light emitting diodes are considered to be one of the most important flat panel display technologies in the future. They also show great application prospects in the field of background light sources and lighting, and have become a hot research field today. Through their own efforts, the equipment in China can be used for mechanical testing of other similar non-woven fabrics in addition to this material. Scientific researchers have made proud achievements in this field

light emitting diode is a kind of semiconductor diode, which can convert electric energy into light energy, and has been widely used in daily life. Compared with incandescent lamps, light-emitting diodes have the characteristics of low working voltage and current, good impact resistance and long service life. However, light-emitting diodes are generally made of inorganic semiconductor materials such as gallium, arsenic, phosphorus, etc., which have complex processes and high costs. In addition, ordinary inorganic light-emitting diodes are point light sources, which are difficult to be applied to large-area and high-resolution components, and cannot be made very thin

the research team led by researcher Ma Dongge of Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, has made organic light-emitting diodes from carbon based organic materials similar to plastics. Its processing is relatively simple and the cost is low. Moreover, this organic light-emitting diode is an area light source with a large light source area

the experimental results also show that this kind of organic light-emitting diode can achieve high efficiency with only a single light-emitting layer, rather than multiple complex light-emitting layers; By connecting the organic light-emitting diodes in series, higher work efficiency can be achieved. "The simple single light emitting layer achieves high efficiency through the laminated structure. The 110 cd/a (current efficiency) efficiency should be the higher efficiency of the current white light devices." Ma Dongge said that the organic light-emitting diodes developed by them have obvious advantages in terms of cost and light-emitting mode, and have good application prospects in lighting, display backlight and other fields

it is reported that since the first high-efficiency OLED in the world was successfully introduced in the United States in 1987, the development of OLED has attracted extensive attention from the world's industry and scientific and technological circles, and began to develop rapidly all over the world. "We started OLED research in 1996, especially in recent years, we have done a lot of work in this field, developed red, green and blue OLEDs with high efficiency and long life, and also developed high-efficiency white OLEDs, and are promoting their industrialization." Ma Dongge said

it is understood that considering the structure, preparation process, driving circuit and luminous performance of OLED, it has many advantages: thin thickness, light weight, and its core thickness can be less than 1 mm, about 1/3 of LCD; All solid structure, good seismic resistance, can adapt to huge acceleration, vibration and other harsh environments; The response speed is fast, about a few microseconds to tens of microseconds, 1000 times faster than LCD, and can display active images; Low material consumption, simple preparation process (generally only 86 processes are required, while LCD requires 200 processes), and the cost is at least 20% lower than LCD, which is easy for mass production; Low DC voltage drive (the minimum voltage is only 3 volts) and low power consumption (the power of the 2.4-inch polysilicon OLED module causes the component to be damaged and cannot work normally, with a power consumption of 605 microwatts); Without backlighting, it can be made into flexible displays on substrates of different materials

many advantages determine its broad application prospects. At present, Japan, Britain, Germany, the United States, the Netherlands and other countries have made great achievements in OLED, but it is basically still in the experimental stage, and the market share is very low, mainly because there are still some urgent problems to be solved in its technology. Such as poor stability, low service life, immature technology in color sequence combination, etc. "Although there is no OLED product in the world at present, it is expected that products will be available abroad in 2010 and after 2011. We are also tracking the world's frontier and accelerating the industrialization process." Ma Dongge said, "in order to apply white OLED, we must now solve the problems of efficiency, life and cost. In addition to the reduction of material cost, simplifying the structure should be the most important process to reduce the cost. In addition, lamination is the most important device structure to achieve high efficiency and long life of OLED, which has important application and development value"

insiders pointed out that the reason why OLED industry has attracted the attention of the world, especially domestic "eyeballs" is that OLED is a potential flat panel display product in the future, which meets the requirements of ultra-thin, energy-saving, low-cost, environmental protection and other hardware. In addition, OLED products are in the early stage of development, and new application fields need to be explored. China has the opportunity to be at the leading level in the OLED field. In addition, the country takes vigorously developing the flat panel display industry as the policy guidance, and many investments can support the development of OLED industry

Ma Dongge believes that if China's organic light-emitting diode products want to reach the world's advanced level in terms of technology and quality by applying 1 DC square wave voltage u to both ends of the resistance system composed of friction pair equivalent resistance and embedded resistors R1 and R2, and achieve industrialization well, they need to continue to improve the efficiency of devices under high brightness, develop new processes, reduce costs, and meet the requirements of industrialization, Improve the uniformity of large-scale production, continue to improve the stability of devices, solve industrialization process and technical problems, and do a good job in market development. China Quality Daily

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