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"Little staff" turned into "Father of Blu-ray" Amazing and interesting Story of hard work,struggle and success

"Little staff" turned into "Father of Blu-ray"

Amazing and interesting Story of hard work,struggle and success

On October 7, 2014, the Nobel Prize Committee announced the award of the 2014 Nobel Prize in Physics to Akasaki Yuki, Amano Hiroshi and Japanese-American Shuji Nakamura in recognition of their invention of blue light-emitting diodes (LEDs).

At this time, Nakamura, who is still sleeping in Japan, woke up and told reporters: "This is unbelievable." Unlike Akasaki Yong and Amano Hiroshi ’s orthodox university research background, Nakamura, who was born as a technician of a Japanese company, had a very rough road on the road to scientific research.

Bumpy research road

In the basement of Nichia Chemical in Japan, a middle-aged Japanese man in work clothes is quietly tinkering with his experiments, consulting documents, sample tests, and collating data ... countless days and nights of expectation, loss, and overthrow have created the Nakamura legend.

In 1979, the 25-year-old Nakamura joined Nichia as a technician and dedicated the best years to this small company that emphasized sales and R & D.

At that time, although the technology of red and green LEDs had been mature for many years, the technical problems of blue LEDs have long plagued the scientific and industrial communities. Without it, it is impossible to synthesize a white illumination light source using the principle of three primary colors. At that time, most scientists chose zinc oxide and zinc selenide as luminescent materials, but Nakamura began to study the feasibility of gallium nitride. To this end, he went to study in the United States in 1988 to study the crystal growth technology used to manufacture blue light diodes.

I come from a small company with very few budgets and researchers. I found very few articles about gallium nitride at the time. Nakamura told Science News in an academic lecture at the Institute of Physics and Chemistry of the Chinese Academy of Sciences that this is a good article. Research topics, his research journey will also begin.

However, due to Nakamura's strong English accent and the lack of a thesis foundation, he was rejected by the surrounding scientific research environment. After a year of school visits to the United States, he returned almost without success.

Back in Japan, because the company's leaders did not allow him to continue LED research, he could only switch to the basement, and successively developed a light-emitting diode using gallium nitride and a gallium nitride light-emitting diode with a double-heterostructure. The technology was officially released on the 29th, opening a new era of solid lighting after Edison.

Behind the halo

In 2000, Nakamura joined a strong research university in this field, the University of California, Santa Barbara.

Nobel Prize winner Herbert Klemmer won the Nobel Prize in Physics for applying semiconductor heterostructure development to high-speed optoelectronic components. At the same time, when he joined Santa Barbara in 1976, he persuaded the school to invest limited funds into the newly formed compound semiconductor technology, making the school dominate in this field.

But Klermer ’s approach to the development of semiconductor heterostructures was not smooth: "The last step took place in 1963 ... I wrote down the idea and submitted the paper to the Applied Physics Letters, which was rejected. Others persuaded I do n’t want to fight this result, but switch to the “Institute of Electrical and Electronics Engineers.” The article was published, but people ignored it. The last irony is that I was refused to use resources to develop a new laser, based on, There can be no new applications. "

One of Kramer ’s important ideas is that the efficiency of modern LED technology comes from converting electricity into light. As he foreseen, a major technological breakthrough created its own application.

On November 29, 1993, the advent of a technology shocked the whole world. A small flaw in nature was finally discovered. Yang Zuyou, president of the University of California, Santa Barbara, academician of the American Academy of Engineering, and foreign academician of the Chinese Academy of Engineering, mentioned in the lecture introduction, which marked the birth of high-brightness blue LED .

Kramer still clearly remembers that he first saw a high-brightness blue LED in a colleague's laboratory in Stuttgart, Germany. I was completely shocked when this thing lit up. Kramer said that , Do you think you will be engaged in this research? Colleagues replied,Dr. Kramer, we have no choice.

On one occasion, Kramer met Nakamura who was giving a speech at the German Physical Society. Kramer told him: What we are witnessing today is the new era after the end of the light bulb era.His small lamp is a hundred times brighter than the previous blue LED. Really, it is very good.I'm sure there are other people who are also working on nitride research ... but Nakamura is the one who has broken through this technology. No one else is close to this breakthrough point. Kramer commented, Of course his industrial background is also in this special Helped him in the case, because it did bring products at the time.

Light up the 21st century
"The incandescent lamp illuminates the 20th century, and the LED lamp will light the 21st century." The Nobel Prize Committee wrote in the award speech.
Nowadays, blue LED products have been used in thousands of households all over the world, making family nights as bright as daylight, but the energy consumption is far less than incandescent lamps and fluorescent lamps. This is undoubtedly of great significance in the 21st century with energy conservation and emission reduction as the focus of global development.
"We are not discussing how to do things better, but to do something we have never been able to do." Kramer said at the 2006 Nakamura "Millennium Technology Award" press conference.
LED lights will also help more than 1.5 billion people in the world bid farewell to the dark era. The low energy consumption of LED lights will enable the lighting of small solar power stations.
"Electric bulbs consume a lot of energy and waste 95% of the output in the form of heat." The author Bob Johnstone mentioned in his book "Nakamura Shuji and the Revolution of Lighting Technology", "By 2010, with the performance of equipment With continuous improvement, prices have fallen sharply, and LED technology will replace incandescent lamps in various households in the United States and fluorescent lamps in offices and commercial establishments. By 2020, these small lights will likely replace all traditional forms of lighting, except for searchlights.

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