The research progress of white LED was originally carried out step by step according to the plan, and has not exceeded the schedule. Unexpectedly, it has broken through in these two days. Maybe it''s accumulated, and it''s logical to break through.


    The traditional PN structure has been successfully replaced by double heterostructure. The doping of indium gallium nitride in gallium nitride has realized the periodic quantum well structure, reduced the refractive index of the material and greatly improved the brightness. Now the brightness is 100 times that of the original... However, it is still blue light.


    This means that as long as the resin coating problem is solved, the white LED lamp can enter the product design stage, and a new product will be born.


    Seeing the achievements, long Jianhua smiled and said to the four of them, "very good. To this extent, it has been nearly a year ahead of schedule. This brightness, as long as we convert blue light into white light, we can succeed. "


    "This progress, we will not publish papers until we complete the design of white LED lamp production line. However, the patent to be applied for still needs to be applied for, and if we want to be comprehensive, we should complete the application for patent protection, and we can''t give others an opportunity. "


    "Tonight, let''s have a drink and reward ourselves for our great progress ahead of schedule. However, we will discuss the coating this afternoon. "


    Zheng Yichun and Qi Hao study coatings. They have made 12 kinds of coatings. The effect of converting blue light into white light is still not good.


    After listening to their introduction, long Jianhua said, "since the effect of adding yellow phosphorus is the best, focus on this one and make it the best."


    When formulating the plan, he put forward several, one of which is yellow phosphorus; After checking the data, they also put forward several suggestions. At that time, he accepted their views in order to find a more suitable one.


    The reason for doing so is that there is sufficient time, and the second is to expect to break through the "previous" technologies and find cheaper and better ones.


    From the current results, scientific research is the same, and the attitude of scientific workers is very rigorous; Among all these schemes, yellow phosphorus is more suitable.


    Zheng Yichun nodded a little depressed, "we really think too much. If we do not continue the last three after the completion of the first nine tests, but focus on yellow phosphorus coating, it may not be a drag. "


    What he cares about is that the progress is delayed and he feels guilty for not completing ahead of schedule with the other group at the same time.


    Long Jianhua shook his head, "what we need to do is to find the best way, with the lowest cost and the highest brightness. If there is a conflict between the two... Find out both and weigh them finally. "


    "When doing scientific research, you can''t have such a heart of comparison. The early completion of their group is due to their own accumulation, but also luck. As we all know, scientific research also includes luck, which can''t be compared, let alone envied. "


    During R & D, there may be a conflict between the two, which will have an impact on the subsequent production cost and product performance, which will affect the choice of consumers. Finally, how to adopt it also needs market analysis, which is determined by the market.


    Zheng Yichun thought for a while and said, "yes. I was a little anxious to see their success. It''s the same project. I''m sorry to let them wait for us. "


    "Let me share my point of view. Sodium compounds can be discarded, and the effect is too poor. Loss of brightness due to excessive use; You can''t neutralize the blue light without it. Next, we should focus on yellow phosphorus and phosphides. "


    Qi Hao then said, "the effect of phosphide is worse than that of yellow phosphorus. I think yellow phosphorus should be made first. When the effect is achieved, we will reduce the cost and make other phosphates. "


    Long Jianhua is happy to hear such discussions between the two of them. Up to now, he has determined that the coating is the best way to add yellow phosphorus. The two of them are eliminating, and they are approaching in that direction.


    He nodded, "let''s make yellow phosphorus first. Just a factor, relatively simple, is a matter of quantity. If there are several factors, that is the trouble, and the orthogonal method should be used for optimization. "


    For dinner, the five of them were in the small private room of the canteen. The chef made him a cured meat steamed, fried a dry loach, and a seafood scuffle. The other three dishes were big pot dishes in the canteen.


    Shi Liqiu poured everyone a glass of wine and sat down, laughing, "President long, are these three dishes your specialties? We''ve eaten before, but we eat very little. "


    He said with a smile, "I taught them to cook these three dishes."


    Yan zuoqiu asked in surprise, "Mr. long, you can cook."


    I immediately felt wrong, hehe said with a smile, "I don''t think you can cook like this."


    As if it was still wrong, he smiled awkwardly, "I didn''t mean that. I just don''t think you can cook. "


    Long Jianhua smiled, "I''ve been in the team. Why not? When the materials were a little rich, I wanted to make all kinds of dishes and patterns. Now we have a rich material life and have no pursuit of these things, but when we drink, we still enjoy such dishes. "


    Zheng Yichun said with a smile, "when we used to eat these things, we also felt very delicious. Unexpectedly, it was invented by President long. It seems that I will also study food in the future. After all, this is also a kind of life. It''s also a good choice for me to study natural science at work and cooking science at home. "


    Qi Hao fully agreed, "indeed, we can study it in the future. Not to mention anything else, cooking for the family is also a kind of enjoyment, which can harmonize the family atmosphere. "


    While several people were eating and chatting, Shi Liqiu suddenly changed the topic, "Mr. long, I think gallium nitride has great uses. I want to continue my research in the future."


    Long Jianhua smiled and said, "yes. You can set up your own project or receive orders from other project groups; However, before doing this, you should understand the characteristics of gallium nitride. This is basic science and requires patience. "


    He is still very interested in gallium nitride. It is not widely used, but it is very useful. It is an important raw material for new semiconductor materials for microelectronic devices and optoelectronic devices. Therefore, he encouraged it immediately after he proposed it.


    Shi Liqiu asked with a smile, "Mr. long, if we become a product, should we have a commission? If I had this money, plus my current annual salary, I would have a high income. It''s good to do these basic research. After studying gallium nitride for so long, I''m really reluctant to put it down. "


    Qi Hao immediately echoed, "me too. With enough money and no life pressure, you can do what you want to do. In the future, I will continue to study gallium nitride. "


    Seeing them say so, Zheng Yichun said, "President long, I hope to go to the lighting company and do production management."


    Long Jianhua looked at the three of them and asked Yan zuoqiu, "what about you?"


    Yan zuoqiu smiled, "I want to continue to improve the white LED for a period of time. Blue light may have achieved the ultimate, but white light should still have some space. If there is no perfect, I will also choose gallium nitride as the research direction in the future. "


    Long Jianhua picked up the cup and touched them, "respect your choice. After the white LED is introduced to the market, the Institute will not be revoked because it will continue its research. Those who study gallium nitride can stay here or join the Institute of materials... "


    Anyway, if someone wants to continue to study gallium nitride, he has put down a big stone in his heart and doesn''t need to continue looking for someone.