Solar cell power generation sounds very high-end, and was touted as a high-tech industry by later generations of media.

In fact, in 1954, Bell Labs had invented a solar cell that could be used commercially.

Although the solar cell power is only 1 watt, it can only drive a special small Ferris wheel.

But in just sixty years, solar cell power generation has become an important means for people to obtain energy.

Solar cell power generation has many advantages such as low cost and less pollution, and is very suitable for use in this era of scarce supplies.

After Li Weidong made up his mind, he put down the pen in his hand, stood up and put his arms around Yu Li's waist: "Daughter-in-law, let's go to sleep."

The next day, Li Weidong got up when the sun rose three poles high.

I washed up hastily, had breakfast, checked in at the motorcade, and slipped out on my bicycle.

Now Li Weidong is a ninth-level engineer and is also responsible for the research of heavy-duty trucks at the Jiefang Plant. The steel rolling plant has given him special permission to commute to and from get off work freely.

After all, the Jiefang Factory promised to finance fifteen 100-ton king machines.

Li Weidong turned around, looked around, and said in a low voice: "The withered flowers, decayed leaves, and dry branches, combined with the cold wind, are so suitable for the scene."

But for Li Weidong, who has ten thousand times more experience, it may only take one morning.

What did I do all morning?

"Goodbye, Teacher Ran!"

Although he does not understand the specific manufacturing methods of solar panels.

"What's wrong?"

"Let's watch together?"

"Uh-huh."

"Come on, try it."

Hu Guangliang looked at the note, shook his head and said: "The above materials are all easy to obtain. I just need to open a letter of introduction for you. But, toothpaste? Are you sure this thing is useful?"

When his eyes fell on the dozen or so thick books, Ran Qiuye felt that his little brain was not enough.

In this era, people clearly know their goals.

"Case."

Out of the corner of his eye, he caught a glimpse of Ran Qiuye squatting on the ground, and he turned around again.

What's right, I'm a math teacher!

"Principles of Optoelectronic Design", "Circuit Construction".

Looking for books from bookshelf to shelf, Li Weidong picked up a lot of books in just ten minutes.

"Push hard."

He reached out and took down the book, and a handsome face appeared across from him.

"good"

Li Weidong, who was anxious to go home and cook, said hello, got on his bicycle and was about to leave.

"Ahem, Comrade Weidong, our library has stipulated that in order to ensure that residents can borrow books, each person can borrow up to five books at a time."

Isn’t it just that in one month, I have received more than two hundred books on automobiles? Is it necessary to modify the system?

Fortunately, solar cells are simpler than car chassis, and the number of related books is also small. You can just read them in the library.

Conversion efficiency is the proportion of solar energy converted into electrical energy.

"How can this be so embarrassing?"

The tip of the pen touched the paper, and she was stunned.

The solar cell power generation panels that Bell Labs was touted to be so miraculous that they could change the current energy situation of mankind have a conversion efficiency of less than 30%.

"There are no restrictions on reading books, as long as they are not taken out of the library."

In this day and age, which man doesn’t want to catch enemy agents?

Li Weidong placed the rectangular copper sheet on the table and used ferric chloride solution to draw neat circuit lines on the copper sheet.

"Thanks!"

It can be said that he is now qualified to be Hu Guangliang's teacher with his attainments in physics.

"Are you ready? I'm going to start."

"Ah, yes, yes, I didn't expect you to guess it right." Ran Qiuye hurriedly took out a pen and paper from his canvas pocket.

Pulled by the rope, Ran Qiuye sat on the bicycle and only needed to hold the handlebars steady.

"Okay, please slow down."

Ran Qiuye broke away from the embarrassment and quickly sat down and covered his face with "People's Pictorial".

"Thank you so much today. If it weren't for you, I really don't know what I would do."

As a university graduate who is committed to the study of science and technology, although he works in a ministry, he has not given up studying cutting-edge science and technology.

Although he has an eccentric personality, his craftsmanship is good and the price is very reasonable. Repairing the chain only costs five cents.

Ran Qiuye:

Li Weidong:

I really didn't expect that this little girl is so delicate and very strong.

Now we realize that solar cells may really have great potential.

"." Hu Guangliang swallowed and asked cautiously: "Aren't you preparing to install solar panels?"

Of course, these materials are very common chemical materials, are not dangerous, and do not violate any regulations.

"80%..." Hu Guangliang's eyes widened suddenly.

Although Yu Li didn't believe that a piece of copper could generate electricity, she was still happy to be able to help Li Weidong.

The higher the efficiency, the more electricity a solar panel with the same surface area can produce.

"It's similar to a semiconductor, used to stabilize voltage."

His eyes widened in excitement, and he walked around on the fallen leaves with his hands behind his back, muttering to himself: "Silicon dioxide is a type of polycrystalline silicon that can produce photovoltaic effects. When light shines on the surface of silicon dioxide, some of the photons are absorbed by it.

The silicon material absorbs; the photon energy is transferred to the silicon atoms, causing the electrons to migrate and become free electrons that accumulate on both sides of the P-N junction to form a potential difference. When the external circuit is turned on, under the action of this voltage, there will be

There is current flowing through the external circuit to produce a certain output power."

Li Weidong moved, and the book under his arm was a little loose: "Stop standing, come and help quickly."

Not to mention industrial production, when ministries and commissions plan factories, they must first consider whether electricity can support it.

Most of the people here are old comrades with gray hair wearing gray Chinese tunic suits.

A young guy like him wearing work clothes is the only one in this area.

Before he finished speaking, Ran Qiuye got on his bicycle and left. Looking at the figure disappearing into the crowd, Li Weidong stuffed his handkerchief into his pocket.

Looking down at the "People's Pictorial" in her hand, she lowered her head in shame.

"I am also responsible for this matter, so of course I have to be responsible. You are welcome."

"Okay, okay."

That tone was extremely low.

With the blessing of thousands of times of experience, it only took one morning for Li Weidong to master the knowledge needed to manufacture solar panels.

".Can't pedal."

"Click."

I took my library card and followed the classification signs hanging on the roof to the 'Science and Technology Area'.

After cleaning the copper sheets, Li Weidong plated a layer of tin on the circuit lines, then applied a layer of toothpaste on the tin plating, and finally welded two wires to the positive and negative poles of the copper plate.

There is no car repair shop near the library, and the nearest car repair shop is three or four miles away.

If it can be developed successfully, it will definitely be a great thing that benefits the country and the people.

Ran Qiuye was a little surprised when she saw Li Weidong holding a lot of books.

Ran Qiuye ran over and helped Li Weidong carry the book to the desk next to him.

Li Weidong: "Let me ask you, what are the main ingredients of toothpaste?"

Repairing the chain requires help from the customer, and Li Weidong's hands inevitably get a little oily.

"Can I read here?"

Yu Li clutched the double-layer capacitor and asked curiously: "Brother Wei Dong, what is this round thing? It seems bigger than the semiconductor in the radio?"

Ran Qiuye rode on the bicycle obediently, while Li Weidong gave orders beside him.

Untie the rope from the seat, tie one end to the rear bar of the bicycle, and the other end to the front of Ran Qiuye's bicycle.
To be continued...