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.
Especially in ministries, you are qualified to have access to foreign academic journals.
Although Li Weidong's solar panels are limited by sunlight and cannot provide continuous power supply, they are sufficient to meet the needs of ordinary households.
Most of the equipment in domestic power plants is imported from abroad. Not only is the quantity small, but problems often occur.
Li Weidong took out a piece of paper from his pocket and handed it over: "Copper sheets, ferric chloride solution, alcohol, tin plating, multimeter, double-layer capacitor, toothpaste. I need these materials, please give me a price!"
Li Weidong scratched his head when he saw Ran Qiuye's little face turning red and then white.
There was no way, last time Li Weidong borrowed all the books on automobiles from the library, which made the old comrades who came to check the information furious.
"Don't you think there's a bad atmosphere here?"
".New regulations?"
Li Weidong felt bad about letting a little girl push a bicycle so far.
If one driver replaces fifteen Hundred Ton Kings, our steel rolling mill will not suffer any loss.
——
After leaving the steel rolling mill, the sun was shining brightly outside.
The driver, Comrade Li Weidong, never forgot his original intention. After hard work, he diligently studied on his own and finally succeeded
Ran Qiuye had unknowingly conceived a promotional draft.
Fortunately, as an experienced driver, you must have a rope when going out.
Li Weidong took a dip in it and was also infected by this atmosphere.
By the way, my mother mentioned that Li Weidong helped the rolling mill team design a lot of good things.
Stretching out comfortably, he looked at Ran Qiuye, who was still excerpting the article: "Teacher Ran, the library is about to get off work, shall we go back?"
The owner of the car repair shop, whose surname is Liu, wears a thin tan coat, yellow clay shoes in the winter, and a broken straw hat even in the house, not afraid of becoming bald.
"It was promulgated the day before yesterday." The young librarian swallowed and spat.
"You saw it."
"Brother, have you watched too many enemy agent movies recently?"
But it seemed wrong to say something.
".I can't even push hard."
"Look, the comrade who borrowed more than thirty books at a time is here again."
In order to avoid getting her new clothes dirty, she could only pick up the bicycle chain with a wooden stick, but failed to pick it up after several times.
That look was extremely tense.
If you want to manufacture solar panels, you must master the corresponding knowledge and become an expert in physics.
Ran Qiuye shook his sore hand and looked at the thick notebook speechlessly.
Hu Guangliang originally thought that Li Weidong just had a whim and wanted to make a small toy.
Li Donglai saw some clues and said with a smile: "Teacher Ran, there are many good articles in the pictorial. You must want to excerpt them and read them to the children, right?
The children are really lucky to have an excellent teacher like you."
Immediately he realized something was wrong and put down the "People's Pictorial".
Working in a ministry, Hu Guangliang has a deeper understanding of the domestic energy situation than ordinary people.
That is to build a weak and impoverished country into a rich, powerful and hegemonic country.
At this time, dense sweat was oozing out from Ran Qiuye's forehead.
The task is arduous and glorious, and the air is full of positivity.
Li Weidong pedaled lightly, "Let's go," and the bicycle slowly drove forward.
Li Weidong packed up his bicycle and ran over, eagerly saying: "How about I give it a try?"
It seems rude not to say anything at this time.
Li Donglai nodded: "Not only is the cost low, if micron-sized holes are etched into the silicon dioxide wafer and a silicon dioxide photonic crystal coating material is designed, the efficiency of photoelectric conversion can also be greatly improved. I have already
After calculation, the conversion efficiency of solar panels produced using this method will reach 80%."
"Wonderful! It's really wonderful! Compared with Bell Labs' monocrystalline silicon solar cells, the cost of silicon dioxide is lower."
Li Weidong took the wooden stick, lifted it four or two times, and gently picked it up, and the chain returned to the tooth plate.
Ran Qiuye saw it while he was talking, so he took out a handkerchief from his pocket and stuffed it into Li Weidong's hand.
"." The young librarian seemed to realize that he had said the wrong thing.
"."
"Weidong, why do you want to make an appointment here?"
My mood gradually became excited, and my strength in pedaling suddenly became a little stronger.
Li Weidong was also helpless.
Does an experienced driver need to learn Maxwell's equations?
".The chain fell off."
"Kick."
"Comrade boss, do you have any soap?"
——
In the capital city, in the woods outside the ministry compound.
For an experienced driver who often repairs bicycles, repairing a bicycle is just a matter of taking it one step at a time.
"It should be almost done now, let's go to the courtyard and try it."
"Ah? Driver Li, are you here to borrow books too? They are all about physics."
Hu Guangliang looked at the desolate scene around him, feeling a little frightened. He gathered his clothes and hurriedly came behind a stalwart figure.
"Detailed Explanation of Maxwell's Equations (Russian Version)", good stuff, keep it!
Most people need more than ten years of study before they can do it.
The total cost of purchasing materials was 1 yuan and 20 cents, and the most expensive ones were the double-layer capacitors.
Although the people walking in a hurry on the street were thin and plainly dressed, their faces were filled with a spirit that would be rare in later generations.
After thinking about this, Hu Guangliang immediately returned to the ministry and helped Li Weidong issue the letter of introduction needed to purchase the materials.
After the lines are dry, ask Yu Li to help clean the copper sheets with alcohol.
Li Weidong grabbed the cold handlebars and rode all the way to the library.
However, toothpaste is used for brushing teeth, how can it make equipment?
With one hand in his pocket, the wind is blowing, his hair is messy, and the dust is rising.
Hu Guangliang raised his eyelids: "Calcium carbonate, calcium hydrogen phosphate, silicon dioxide, aluminum hydroxide, silicon dioxide!"
Just like those people on TV who do bad things.
"Harder."
Energy is extremely scarce, and even in the capital, there are frequent power outages. Not to mention the vast rural areas, 80% of which have no electricity at all.
Is he trying to invent something again?
Well, that must be the case.
The bicycle chain was broken into two parts, like a limp water pipe, hanging on the dusty ground.
Li Weidong came to the door with a copper plate and a lamp holder.
We have just finished lunch now, the sun is shining brightly outside, and the residents are moving stools outside to bask in the warmth.
The adults were gossiping, and the children were chasing each other. The hustle and bustle was full of the fireworks of life.
The copper plate and lamp holder quickly attracted the attention of the residents.
Silly Zhu came over with He Meimei in his arms: "Brother Wei Dong, what are you doing?"
