LED lighting is facing three challenges: humanization, low cost and intelligence

Based on the development of nitride LED semiconductor lighting, after more than and 10 years of development, has made remarkable achievements. Quantitative change to qualitative change, from technology to the market, semiconductor lighting has accumulated a certain amount of strength, to go further, need to look far enough to grasp the direction and trends. So, since the development of semiconductor lighting industry has entered a stage of development how, what are the trends and characteristics? This period we are the current development and trend of semiconductor lighting problem, interviewed experts in the field of materials, China Academy of Sciences Academician, Professor of physics at Nanjing University Zheng Youliao, he has long been committed to new semiconductor heterostructure materials and device physics research has also been concerned about the development of semiconductor lighting industry. In the opinion of Zheng Youliao, from the light driven semiconductor lighting effect gradually entered the development stage of light quality driven, and the development of LED intelligent lighting, give full play to the advantages of semiconductor lighting, lighting to create a new digital era.

Semiconductor lighting will enter a new stage of rapid development

Over the past more than and 10 years, the semiconductor lighting industry after several times of the development process, through gradual transformation, integration will enter a new stage of rapid development. A few years ago, in the light of the driving force, nitride LED chip high efficiency light-emitting technology has been greatly developed, and increasingly mature. The current LED chip light effect has reached a high level, the price decline is also very fast, for LED lighting product cost in the proportion is declining, the semiconductor lighting technology is becoming increasingly being recognized, LED lighting is the development trend of the entire lighting, traditional lighting industry transformation and upgrading will lead. At present, the proportion of semiconductor lighting in the lighting industry is not very large, is still in the early stages of development, there is still a long way to go.

LED lighting with the different light source, the LED lighting should be different from the previous higher requirements, such as high optical quality, humanization, safety, etc. to meet the physiological and psychological feeling of people, and meet these requirements is not enough, and a lot of work to do. Therefore, the semiconductor lighting technology in improving the efficiency of light at the same time, will enter a new stage of development of optical quality to meet the needs of applications.

The challenge of humanization, low cost and intelligent lighting

Semiconductor lighting technology is a new generation of electric light source and multi technology integration, involving LED chip light emitting nitride phosphor powder, stimulated luminescence and light extraction and light transmission and electric drive many technologies such as high efficiency of fusion. Although these technologies have made great progress, promoting the development of semiconductor lighting as a strategic emerging industries, but there is still much room for improvement, to be continued development of technology. At present, the semiconductor lighting development faces many challenges, mainly summed up in three aspects: one is to improve the quality of light to achieve humanization lighting; two is a low cost of lighting; three is the intelligent lighting, the semiconductor lighting efficiency, green, intelligent features are fully embodied.

Semiconductor lighting to become people's daily necessities, must be cheap, improve quality, reduce costs is the pursuit of the goal. LED chip for semiconductor lighting product cost in the proportion of the past long-term high, because in recent years the development of LED technology, the chip price has been greatly lowered, but semiconductor lighting is a lighting system, its cost depends not only on the LED chip, including component, component cost lighting system. Therefore, it is more and more important to reduce the cost of lighting system components and components.

Current semiconductor lighting technology is progressing rapidly, in which the substrate material, the substrate material used in the current LED, sapphire is relatively mature, low cost, and is developing to 6 inches. Silicon carbide is known to be very expensive, mainly in high-end chip products. The crystal silicon has the advantage of low price, but compared with sapphire, silicon nitride epitaxial technology still need further development. Based on the needs of the application, which is based on the needs of the application, from the technical maturity, yield and price of the three aspects of the trade-offs for decision-making. The sapphire substrate nitride epitaxial growth technology is relatively mature, made of LED chip yield is very high, and the sapphire substrate prices continue to decline, and die size is increasing, therefore, the sapphire substrate is still the mainstream of the LED epitaxial substrate material.

Semiconductor lighting is an important goal of pursuing the realization of high efficiency light emitting. Intelligent lighting will give full play to the advantages of LED electronic hole composite physical light-emitting mechanism, leading to the realization of the digital era of lighting, and further achieve the two energy-saving features, is the development direction of LED lighting. Semiconductor lighting intelligent electronic technology support, need more enterprise and technical force to participate in the implementation, microelectronic technology, sensor technology and LED lighting technology integration, which also led to the development of the microelectronics technology, sensing technology industry.

On the other hand, the international convention of January 19, 2013, "international" pollution prevention and treatment of mercury release, governments agreed to ban a series of mercury products production and trade before 2020, including mercury containing batteries, switches, energy-saving lamps, soap and cosmetics etc.. At the same time, the use of mercury thermometers and blood pressure should also be gradually replaced before 2020. This brings new opportunities for the development of LED lighting industry, and more effectively promote the development of LED lighting. Therefore, from the industrial point of view, the application will become the driving force for the development of LED lighting industry, R & D