"Nana, I just bought a factory to make solar panels. I need to send a trustworthy person to help me manage it. After thinking about it, I think you are the most suitable," Zhang Ziang said.

Nana felt sweet when she heard Zhang Ziang say so, because Zhang Ziang's words: trustworthy people... But Nana didn't promise immediately. After thinking for a while, she refused.

This was beyond Zhang Ziang's expectation.

"I'm sorry, Zi'ang. I can't promise you. I haven't graduated yet. I'm afraid I'm lack of ability..." Zhang Zi'ang interrupted before I finished.

"If it's because of this, Nana, you don't have to worry. Everyone's ability is slowly cultivated. I believe you can. Moreover, the old factory director is still there. I'll let them help you. I believe you!"

After Zhang Ziang's repeated persuasion, Nana finally agreed. Now Nana is about to graduate. Many students in school have begun to look for jobs. Even now working will not affect their studies.

Moreover, the school also supports college students to go out of school and adapt to the society as soon as possible.

The next day, Nana came to the technology ball solar energy company in a formal suit, and Zhang Ziang called everyone together for a meeting today.

"This is miss ouyangna. In the future, she will be the deputy director of the factory, mainly responsible for the management of the factory." Zhang Ziang introduced to you: "the factory director is still Zhang Xing, who is responsible for sales. You are familiar with solar energy, and you will have to trouble you a lot in the future."

"No trouble, no trouble, this is what I should do." Zhang Xing hurriedly said. In his opinion, Zhang Ziang is actually his life-saving benefactor. Now the situation is the best result.

Although the factory will not belong to itself in the future, the foreign debt has been paid off, and I still have some money in my hand, which is enough for my old age.

It's light now.

"Please take care of factory director Zhang in the future." ouyangna said with a smile.

"Where, where, now is the world of young people. I can't keep up with the pace of the times. I really want to learn new knowledge from you." Zhang Xing is very kind. He understands the purpose of Zhang Ziang's ouyangna and can judge the general from the intimate relationship between the two young people.

This is probably... The future landlady ah, Zhang Xing naturally can't put on airs.

Let's get down to business.

"To tell you the truth, our factory's previous performance was not good, a large part of which was that our technology could not satisfy customers, and our cost performance was not high," Zhang Ziang said.

Zhang Xing nodded, which he did not deny.

"I also know that this scene is not just our factory. Other factories are not much better. Just like us, only a few enterprises can survive. The most fundamental reason is that there is no breakthrough in technology!"

In the solar energy sector, only a few manufacturers can make profits, and the photoelectric conversion rate of their products is relatively high.

The photoelectric conversion rate of solar panels of science and technology ball solar energy company can only reach 15%, while that of other manufacturers has reached 17%.

Although there is only a difference of two percentage points, the gap has been pulled out.

Technology ball Solar's previous products were mainly polysilicon, and its photoelectric conversion rate was 15%.

The by-product is monocrystalline silicon solar panel. The photoelectric conversion rate of this solar panel can reach 20%, but the cost is greatly increased, which is not cost-effective at all.

Zhang Ziang glanced around: "if our technology ball solar energy company wants to make a breakthrough, it must innovate in technology and take the lead in technology."

Zhang Xing deeply thought so. He nodded, but everyone understood the truth, but the technology was so easy. Can he make a breakthrough? He drew a big question mark in his mind.

"You should also know that there are three kinds of materials for solar panels, monocrystalline silicon, polycrystalline silicon and thin film."

"Most of them are polycrystalline silicon and a small amount are monocrystalline silicon, but we rarely see thin films. This time we start from thin films!"

"Please look!"

Zhang Ziang took out a small piece of black film from his pocket, about 20mm long and 20mm wide.

"I never fight unprepared battles. The reason why I bought this solar panel factory is not in the face of Zhang Xiaoyu, nor on a whim, but thoughtful!"

"The film in my hand is the latest research achievement of our company, code named black hole!" Zhang Ziang said loudly: "don't underestimate this small film, but it can ensure that the solar energy conversion rate reaches an amazing 90%

"90 percent!" Zhang Xing stood up in surprise and opened his eyes very wide: "it's impossible. With current technology, let alone 90 percent, even 50 percent, no company can do it!"

"If others can't do it, it doesn't mean we can't do it. Who are we? We're a science and technology ball company!" Zhang Ziang also stood up: "if you don't believe it, you can take this black hole film to test it. If you believe a lot, you'll get results."

Zhang Ziang handed the film to Zhang Xing.

Zhang Xing ignored the meeting and went out immediately. He was shaking all over when he went out. Although he held only a film in his hand, it was as light as a feather, but he felt as heavy as Mount Tai!

This black hole film is naturally produced under the guidance of the small ball. The rational use of solar energy is one of the standards of civilization. There has been mature technology in the small ball for a long time.

There is even more than one. The film now taken out is only one of them.

Zhang Ziang has now completely mastered the manufacturing method of black hole film. 10% rosin, 10% shellac, 20% plexiglass, 30% polystyrene and some materials are mixed together in a certain order and at a certain time. Through the catalysis of catalyst, black hole film will be synthesized.

It's simple to say, but when and how much to add are confidential and can't be spread out!

Black hole film can let the sun in, but it can lock the heat without leakage. It can only go in but not out!

Ten minutes later, Zhang Xing ran over excitedly: "it's incredible. It's really incredible. How can there be such a film? It really did it. The conversion rate of solar energy can really reach 90%!"

Now the accuracy rate of solar panels is about 20%. A square meter of solar panels can supply about 230 watts of power. Although there is fluctuation, there is little difference and there will be no qualitative difference!