LED people's Chinese dream: in order to really close to ordinary people LED

Although already in China on the roadmap of incandescent lamp is very clear, many countries and places are also issued to encourage the production and promotion of LED products of the relevant support policies, however, due to price factors, LED lighting distance of ordinary people can really accept, there is still a certain distance.

It is said that the LED industry is based on the growth of sapphire. That is because, the first choice for the production of LED chip crystal material, sapphire, accounting for 85% of all the substrate materials used in LED manufacturing. In general, the sapphire substrate accounted for up to 20% of the cost of LED products, can be said to be the highest cost of materials in the LED supply chain. It can be seen, if you can find a cheaper material more beautiful material, to replace the sapphire, to reduce the cost of production of LED, so that it can eventually really into the homes of ordinary people, its role is obvious. Li Guoqiang and his State Key Laboratory of luminescent materials and devices, South China University of Technology, LED epitaxial materials and devices research group is to do this thing. "If a lot of people live a healthier and more convenient life for our research, it will be a great honor to be a researcher. Science and technology to change life, he and his team's greatest wish.

This year 35 year old Li Guoqiang is a professor of South China University of Technology, doctoral tutor, the Guangdong Provincial Natural Science outstanding youth fund winner of the year 2013. Mainly engaged in the research of III-V compound semiconductor materials and devices, presided over a number of national, provincial and ministerial level scientific research projects. In recent years, published 68 papers in the international well-known journals (including ESI high cited papers of the SCI, the impact of the factors IF>9 Article 2; IF>4's cover article of the 4; and IF>3 articles of the 20). The paper was cited 551 times, including the cited by the Science, more than 20 times by the United States and the Chinese Academy of Sciences / Academy of engineering. Apply for 45 patents, authorized by the 20; the International Conference on the occasion of the special report, the 30 oral report; as the International Conference of the general assembly / branch chairman of the 2 times of the 10. In April last year, Li Guoqiang was awarded the fifteenth Guangdong youth medal 54".

Over the years, Li Guoqiang and his team in the use of new materials to replace sapphire has achieved fruitful results in the study. They will be different novel substrate material for epitaxial III nitride thin film growth, promote the blue and white LED technology based on the new substrate; III-V compound semiconductor defect microstructure and defects of formation mechanism, improve the quality of LED epitaxial silicon material; a patterned substrate design ideas, and then develop the related software, to design a variety of new patterned substrate scheme greatly improves the optical efficiency of LED. Related research results and domestic LED industry leading enterprises, has produced good economic benefits.

Their research results have been highly recognized by the internationally renowned academic publishing house Royal Society of Chemistry (RSC). As RSC has significant influence in the material and chemical industry journal Journal of Materials Chemistry C (SCI a magazine, IF=6.1), published in February 7, 2014 fifth cover article, published the results of a study of the team, with a bold text, so the evaluation team's research direction and achievements. "Professor Li Guoqiang LED the group of optoelectronic semiconductor light-emitting materials and devices belonging to the South China University of Technology State Key Laboratory, is pushing forward the development of new compound semiconductor materials and devices".

While another team reports new graphical substrates research preparation of blue LED, is crystal growth, the Journal of the American Chemical Society (ACS) Crystal Growth & Design (IF=4.7) as published in June 6, 2012 sixth cover article published. Then, the famous magazine "has a strong international influence and position in the semiconductor industry and academia Semiconductor Today", and in 2013 September the representative results, "Optimizing spherical cap patterned sapphire for nitride semiconductor LEDs", 2 pages of special reports in the new team graphic design and its substrate LED device production work, that the "spherical patterned substrate is presented on the LED to improve the nitride LED significant optical efficiency". And commented that, due to the new pattern of patterned substrate height is low, so the pattern of the processing time is short, help to reduce processing time and cost, which is of great significance for the large-scale industrial production of LED. "

Before returning to the South China University of Technology in 2010, Li Guoqiang is the University of Oxford Department of materials University of Tokyo researcher at the Royal Society, JSPS production technology research institute post doctoral fellow, senior research scientist, GE Global Research center. At that time, the famous British LED and optoelectronic components manufacturing enterprises Oclaro provides a permanent contract for an indefinite period of time and salary for him; at the same time, University of Cambridge also dished out an olive branch to the LED team hope he can join the school. However, Li Guoqiang gave up the British liberal research conditions and positions, and many outstanding Chinese students, with a dream to return to Guangdong to serve the country China. He said: "science is to serve the progress of mankind, regardless of fame and fortune, I want to do something for my country to choose to return home. "