With the continuous growth of the global population and economy, the low-carbon economy has become another major progress in human society following agriculture and industrial civilization. At the welcome reception of the Nanjing Science and Technology Circle held recently, experts from Southeast University said: Nanjing should focus on deploying a high-power photonic crystal LED industry chain, making Nanjing a model city for energy conservation and emission reduction.
Nanjing experts overcome the bottleneck of LED technology
The essence of a low-carbon economy is energy efficient use, clean energy development, and the pursuit of green GDP. The core is the innovation of energy and energy-saving technologies. The semiconductor LED light source is one of the core technologies for energy saving and emission reduction. If it can seize the commanding height in the LED industry, it will undoubtedly lay a good foundation for the transformation of Nanjing into an innovative city.
At yesterday's New Year reception, Sun Xiaoyu, chairman of the Nanjing Optical Communication and Photonics Society and a professor at Southeast University, made an expert speech on "Nanjing has a plan to focus on the deployment of a major power photonic crystal LED industry chain." She believes that the current energy consumption in lighting, LCD panels, projection, stage lighting and other fields is extremely high, and high-brightness and high-power semiconductor light sources are urgently needed. In recent years, experts in Nanjing have made breakthroughs in the research of photonic crystal LEDs. At the same time, the direct control of temperature by semiconductor chips has greatly reduced the heat generation of the light source. A series of breakthroughs in technical bottlenecks have made Nanjing a leader in building the LED industry chain.
Therefore, Professor Sun Xiaoyu suggested that Nanjing can plan and focus on the high-power photonic crystal LED industry chain, build key bases as soon as possible, quickly absorb and master all the design and production technologies, form a core technology with independent intellectual property rights, and fill the national high power. The blank of the photonic crystal LED chip industry.
The price remains high, and it will take time to promote
LEDs using LED technology do not have tungsten filaments, and there are no light-emitting devices such as lamps. As long as they pass a special chip, they can convert electrical energy into light energy. As a new lighting technology, LEDs are energy-saving, environmentally friendly and have a long life. Features such as quick start-up are generally optimistic. At present, in Nanjing, the model road tunnel has taken the lead in using LED lights, which is more than 50% more than the currently used high-pressure sodium street lamps. Some people have calculated an account. There are more than 160,000 high-pressure sodium lamps in the urban area of ​​Nanjing. If the street lamp consumes 0.5 kilowatt-hours per hour, the city's street lighting will use about 320 million kilowatt-hours. If all LED street lights are replaced, at least 160 million kWh of electricity can be saved and more than 50 million tons of coal can be saved.
Although LED lights have such advantages, the promotion is not satisfactory. There are only a few roads in Nanjing that use this new type of light source. The reason is that the core technology is in the hands of foreigners, resulting in high prices. However, from the speeches of experts yesterday, our experts in Nanjing have already overcome the relevant technology. "We have completed the development of InP multi-quantum well photonic chip, and have carried out many researches on photonic crystal LED and LED packaging." Professor Sun Xiaolu said, "Next, we hope to cooperate with relevant scientific research and production enterprises. Nanjing's new high-power LED research center lays the foundation for the formation of an energy-saving and emission-reducing light source industry chain in Nanjing.†Experts confidently said that as long as we master the core technology of LED, the price will definitely come down, and then the ordinary citizens The promotion of the use of LED lights is a matter of course.
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