Chapter 899 "High Efficiency"

After reading this battle report, Gao Zhendong felt relieved.

Steady!

He knew that this thing was a powerful weapon against the armored torrent, but he was not sure whether the one he led in making was authentic, after all, it had not been tested in actual combat.

Now with this battle report, the biggest threat to conventional land forces in the next few decades can almost be said to have been completely eliminated.

As for whether the Russians would be able to pick up the wreckage from Zang San and imitate it, Gao Zhendong was not worried at all. The Russians' problems could not be solved by picking up some broken copper and iron. In his previous life, they had also spent a lot of time on this, but the results were not very good.

Although it was nominally developed, at least the two brothers didn't see this thing when they were fighting.

The anti-tank missiles mentioned above are unlikely to influence the direction of a battle at the campaign level, but the terminal-sensitive bomb can. And compared with the second-generation tanks, which can also influence the direction of a battle at the campaign level, the terminal-sensitive bomb is easier to scale up, more convenient to use, and cheaper.

He put down the battle report and made a phone call in a happy mood.

"Well, I'm free now, come over."

In a few minutes, Tang Shaohui brought the core members of the team to him. With them were two finished solar panels with dark and deep silicon wafers on them.

"Boss Gao, we've done it! The photovoltaic efficiency of monocrystalline silicon is 20.3%, and the photovoltaic efficiency of polycrystalline silicon is 17.1%!"

For Tang Shaohui and his colleagues, with the strong support of 1274 in semiconductor technology and a series of advanced production equipment developed by Gao Zhendong and 1274, their biggest trouble turned out to be the production of the velvet surface of silicon wafers. Once the velvet production problem was solved, the other problems that followed became a matter of trial and error.

Moreover, Chief Engineer Gao has already helped me eliminate a lot of wrong answers for the multiple-choice questions, but he is allowed to do them a few more times. How can I not get any results?

It is hard to say about large-scale mass production now, especially for monocrystalline silicon photovoltaic panels, but at least there is no problem with polycrystalline silicon. The hydrogen peroxide three-step process, which was accidentally discovered by the team and improved with the help of Chief Engineer Gao, is really good for the texturing of polycrystalline silicon panels.

Don’t underestimate the step of velvet making. Many solar panels in later generations are called “velvet X-crystalline silicon solar cells”. The fact that the name can be added to the adjective of the full name shows its importance.

Tang Shaohui spoke with pride. For them, this was a very significant achievement. He had never even thought that he could achieve results of this level.

As senior technicians who have been working on solar cells for a long time and are familiar with domestic and foreign literature, they know very well what these two photoelectric conversion efficiencies represent.

Gao Zhendong was also a little surprised when he heard this. Although he knew that the heights that monocrystalline silicon and polycrystalline silicon would reach in the future would be much higher than the data Tang Shaohui said, but what era was that and how much investment was involved?

It can be said that to achieve this efficiency, even with the technical support provided by themselves, Tang Shaohui and his team have made great contributions.

"Good! Great! You've exceeded your target, hahahaha."

Originally, under the guidance of the Defense Work Committee, the target was set at 12% for monocrystalline silicon, but Gao Zhendong himself was thinking of 15% for monocrystalline silicon. As for polycrystalline silicon, it was not considered at all at the time and was only added at the suggestion of Tang Shaohui.

"What about other performance aspects? Especially the attenuation aspect." Gao Zhendong thought about it and decided not to open champagne at halftime, so he had to calm down.

"It has been done, and it fully meets the requirements. The attenuation of single-crystal silicon under irradiation conditions also fully meets the requirements." Tang Shaohui knew that Gao Zhendong attached great importance to this aspect, and he made preparations early on, and the full set of tests was done very thoroughly.

"Good!" Gao Zhendong had no doubt: "How mature is the process?"

Hearing this, Tang Shaohui felt a little embarrassed. This matter...

"There's no problem with polycrystalline silicon, as we have the capacity for mass production. As for monocrystalline silicon...it's a bit like a laboratory product, mainly because it has very high requirements for conversion efficiency, so many process links are strictly controlled. As a result, there's no problem with product performance, but the cost is very high." This is a bit of a letdown for Mr. Gao.

Unexpectedly, Gao Zhendong didn't care at all and was very happy: "Hahaha, well done! Well done!"

So-called laboratory products are things that cannot be mass-produced and promoted, but there are many types of laboratory products.

It works in theory, but the performance is unstable or the duration is short, and the cost is not even worth considering. This is one kind.

The theory works and the status can be stabilized, but only the main indicators are achieved and other indicators are very poor. This is one kind.

The theory is fine, the state is stable, and various parameter indicators are qualified, but the conditions for mass production are not met, such as scarce raw materials, high costs, and major production equipment is restricted by other conditions...

What Tang Shaohui is talking about is the last one, and the most acceptable one is "high cost".

Compared with the problem of not being able to find materials or equipment, sometimes the problem of being too expensive is not really a big problem. Too expensive just means that it cannot be used in large quantities, while in other cases it is whether it can be used or not. The difference between 1 and 0 is sometimes very big.

And when it comes to these two types of solar panels, the situation is even more special.

"Single-crystal silicon is expensive to begin with. If you want to use it on a large scale, you can't afford it. For special purposes, as long as it is stable and meets the index parameters, you can just prepare a little in the laboratory. For large-scale use, it is still polycrystalline silicon, which can be mass-produced, which is enough at this stage."

Seeing that Tang Shaohui was still a little embarrassed, Gao Zhendong took the initiative to explain, and his meaning was very clear, you don’t have to worry about this matter, you have done a good enough job, and have fully met the requirements of the project, and have even exceeded them by a lot.

Originally, Gao Zhendong was thinking of getting some monocrystalline silicon for use in satellites, and then taking into account a few units in remote areas with extremely inconvenient transportation. Unexpectedly, with the efforts of Tang Shaohui, this new force, it could even be popularized for use. Although it cannot be compared with the popularity in later generations, it is at least a big step forward compared to Gao Zhendong's original idea.

After that, he patted Tang Shaohui on the shoulder and said, "Make a technology briefing, I'll report it, and prepare for the acceptance meeting."

The next morning, the comrades in charge of the satellite power supply system received a notice from the Defense Work Committee.

Looking at the content of the notice, he laughed.

"At 2:00 p.m. on X/X/X, a high-efficiency solar panel results acceptance and appraisal meeting will be held in the X conference room of the Defense Work Committee. Please be sure to attend."

Are the solar panels ready? Since the National Defense Committee has clearly added the word "high efficiency" to the name of the appraisal meeting, it seems that this thing is not bad.

Looking at the date, it was this afternoon, so he hurried to ask for leave from his unit leader. As a core backbone in this area, no matter where he went during working hours, he had to say hello to his leader first.

The leaders of the unit were even happier than him. If this problem was solved, it would mean that they were one step closer to launching a practical satellite into space.

"Go, go, and bring back some good news."

"It is definitely good news. Things led by the National Defense Working Committee are relatively reliable." Although he did not see the specific results, this comrade was very confident. He remembered that the National Defense Working Committee had handed this matter over to one of the most powerful scientific research forces in this field, as rumored.

Gao Zhendong said that he is second to none in optoelectronics, but it is hard to find anyone who dares to claim to be number one at this time.

It was afternoon, and there were not too many people in the meeting room of the solar panel achievement appraisal meeting of the Defense Working Committee. Representatives from the 17th Ministry of Machine Building, the Defense Working Committee, and the 12th Ministry of Machine Building had all come. Apart from satellite power supplies, which were the most obvious users, there were not many others, mainly experts in related fields.

However, there was a group of very interesting participants. They came because they heard about this incident and that it was related to Gao Zhendong. They were very humble when they came. We just listened and learned, without any nonsense.

This group of people are the military representatives stationed in the Defense Working Committee. Now they are very interested in any meeting with Gao Zhendong's participation, even if it has nothing to do with them. But what if they can find something new?
This is especially true in the Army. This is one of the most handsome guys to come out of the Army. Even if there is nothing wrong, it would be fine to come and support him.

When the participants who didn't know much about the situation got a look at the report materials, they were stunned. There was something weird about the responsible unit.

Collaborating units include Institute 1761 of the 1274th Ministry of Machine Building, Factory of the th Ministry of Machine Building, and XX Institute of the Ministry of Applied Chemistry.

The main unit is the Third Steel Rolling Mill of the Seventeenth Ministry of Machine Building.

It is normal for either of the first two units to be the main unit, one responsible for theoretical research on semiconductors and crystals, and the other responsible for semiconductor process production. There is nothing wrong with that. Even the Research Institute of the Department of Applied Chemistry is barely suitable.

However, these three units collaborate, and the main unit is the Third Steel Rolling Mill, which seems to have nothing to do with solar panels.

It’s the opposite of Tiangang.

But those who are knowledgeable know that it seems that today’s matter is settled!
The appraisal and acceptance of results does not mean that they will definitely pass, but today's one is almost a done deal. Looking at Gao Zhendong sitting at the reporting seat with a smile on his face, needless to say, this is another pleasant day.

A new achievement is about to be born, how can you not be happy?

Moreover, this one will most likely not cause any noise and will be comfortable to drive.

However, the comrades who were working on satellite power supplies could not wait to turn to the parameter page of the materials.

"What the hell!!! Is that impossible??!" Even if he was well-educated, he couldn't help but say "what the hell" at this moment.

The numbers in the parameter table are too eye-catching!
Polysilicon, which was not originally considered, appears here, and its efficiency is as high as 17.1%.

As for the other original protagonist, it’s even more exaggerated, exceeding 20%! ! ! !
(End of this chapter)