Cao Yongji, the founder of LED's new record

1998 graduated from the school of materials, University of Science and Technology Beijing, received a doctorate;

1998 - 2000, Institute of physics, Chinese Academy of sciences;

In September 2000, he was appointed associate professor of physics at the Chinese Academy of sciences;

In 2006, the Chinese Academy of Sciences, the "hundred people plan and the introduction of overseas talents" into the Chinese Academy of Sciences, Fujian Institute of material structure;

2008 by the Chinese Academy of Sciences, 100 people plan to introduce outstanding overseas talents to support;

In 2010 the Fujian Yunsheng Youth Science and technology award;

2012 by the Chinese Academy of Sciences, hundred program final evaluation excellent......

Behind this series of experiences, is the life track of, the founder of LED.

As China Fujian Academy of Sciences researcher at the Institute of material structure, project leader, director of advanced materials research laboratory, Renmin University of China, doctoral tutor, Professor Cao Yongji, is by virtue of the international forefront of sharp and walking stick, in the field of laser ceramics and photoelectric materials made their own a unique "".

Continuous improvement to create LED new record

As the third generation of green energy-saving lighting model, LED semiconductor lighting by the governments of all countries attach great importance to. After the test of practice, LED has been successfully labeled such a label: high luminous efficiency, super energy saving, green environmental protection. This is the most prominent feature of LED lighting. As a result, LED is regarded as the next generation of lighting source worthy choice.

Transformation has become a trend. And how to transform, has become a lot of experts and scholars to think about the problem. "LED to large-scale enter the field of general lighting, first of all to reduce the cost, at the same time to ensure the high efficiency, high reliability, high color and other technical advantages at low cost. Director of the Academy of Sciences, Fujian China material structure Institute of advanced materials research center of Chinese Academy of Sciences Institute of Haixi (now relying on the Chinese Academy of Sciences Fujian Institute of material structure construction) integration of advanced manufacturing and technology deputy director, researcher Cao Yongji said.

Cao Yongji is very clear the development of the center, it is the light of functional ceramic materials, semiconductor lighting materials and Research on key technology research and development as the core, to promote the application of engineering and industrialization as a means to achieve breakthroughs in key technologies and integration, promote advanced material industry.

2011, the two sides of the Taiwan Strait LED industry science and technology achievements conference announced that China has invented the entire lighting effect is higher than 141lm/W LED fluorescent lamp and has realized industrialization. This means that China's LED fluorescent lamp lighting effect for the first time to refresh the world record. Prior to this, the highest international light effect is Japan's Nichia Chemical Industries Corporation in the same type NSSW157A lamp developed in 2011, the overall optical efficiency is 129lm/W. This record by Haixi Research Institute of Chinese Academy of Sciences and Fujian Wanban Optoelectronics Technology Co., Ltd. Xiamen Sanan optoelectronics co refresh, not only the overall optical efficiency is increased by 10%, the cost is only 1/4.

In 2012, the results show that the packaging technology of special ceramic MCOB, China has achieved the world's highest efficient light source 231lm/W industrialization; at the same time achieve the 153lm/W (Ra>82) industry interior lighting bulb light effect, and recent laboratory results indicated that Ra=92, the whole lighting effect can reach 168lm/W. This is one of the highest data reported at the time, not less than the United States Cree company uses the company's high-end chip packaging light source light effect, but the cost is only Cree of 1/10.

In the same year in October, he developed a transparent ceramic phosphor to achieve the 261lm/W white light LED laboratory light source effect, was the highest luminous efficiency at home and abroad. In 2013 by the Chinese Academy of sciences achievements, from 3 domestic and foreign academicians enjoy high reputation of the semiconductor field and nine experts after review, the research and development of low cost and high reliability high efficiency ceramic based multifunctional improved MCOB package integrated technology experts have been identified as "comprehensive performance and technical level has reached the international advanced level in January 31, 2013, Chinese Academy of Sciences identification in".

"We are based on the independent intellectual property rights innovation, advanced technology and equipment to form a stable, with the integration of fundamental and key technology of the field and to solve major national needs, make research and development, engineering, production and application of the advantages of power can be integrated and rapid promotion. He told reporters.

Independent research and development off the crown of the pearl"

Laser transparent ceramics has the "crown jewel" reputation of the defense has an important application background, is the key material for foreign embargo, the urgent need for national defense, by the United States military that is the laser gain medium is the most development potential. At the same time, it is also considered to be the most pure, optical quality is the best, the highest performance, the difficulty is also the highest in the integration of advanced ceramics and the highest technology.

As one of the two most important materials for the future development of laser, laser transparent ceramics have been greatly supported by the governments of the world. In Japan and the United States, laser transparent ceramics field of 100 kilowatts has become a reality, but the material embargo and technical importance, forcing our country quickly recognize a reality -- must be developed, in order to have ample food and clothing "".

After several years of research, Cao Yongji realized that the bottleneck of laser ceramic preparation is on the performance of very strict requirements of high temperature and high vacuum sintering equipment and preparation process, and China's high vacuum technology and foreign technology gap in more than 15 years. In order to make a breakthrough in technology, Cao