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 get off work freely.
After all, Jiefang Factory promised to finance fifteen hundred-ton kings.
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.
Although the people hurriedly coming and going on the street were thin and plainly dressed, their faces were filled with a spirit that would be rare in later generations.
In this era, people clearly know their goals.
That is to build a weak and impoverished country into a rich, powerful and hegemonic country.
The task is arduous and glorious, and positivity is in the air.
Li Weidong took a dip and was infected by this atmosphere.
My mood gradually became excited, and my strength in pedaling suddenly became a little stronger.
In order to make solar panels, you must master the corresponding knowledge and become an expert in physics.
Most people need more than ten years of study before they can do it.
But for Li Weidong, who has ten thousand times more experience, it may only take one morning.
Li Weidong grabbed the cold handlebars and rode all the way to the library.
"Look, the comrade who borrowed more than thirty books at a time is here again."
"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."
"....New regulations?"
"It was promulgated the day before yesterday." The young librarian swallowed.
No way, last time Li Weidong borrowed all the books on cars from the library, which made the old comrades who came to check the information furious.
"Can I read here?"
"There are no restrictions on reading books, as long as they are not taken out of the library."
"Thanks!"
"..." The young librarian seemed to realize that he had said the wrong thing.
Li Weidong was also helpless.
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.
I took my library card and followed the classification signs hanging on the roof to the Science and Engineering District.
Most of the people here are old comrades with gray hair wearing gray tunic suits.
A young guy like him wearing work clothes is the only one in this area. ….
"Optoelectronic Design Principles", "Circuit Construction"...
Looking for books from shelf to shelf, Li Weidong picked up a lot of books in just ten minutes.
"Detailed Explanation of Maxwell's Equations (Russian Edition)", good stuff, stay tuned!
He reached out and took down the book, and a handsome face appeared across from him.
"Ah? Driver Li, are you here to borrow books too? They are all about physics..."
Ran Qiuye saw Li Weidong holding a lot of books and felt a little
be surprised.
Li Weidong moved, and the book under his arm was a little loose: "Stop standing there, come and help quickly."
"Uh uh..."
Ran Qiuye ran over and helped Li Weidong carry the book to the desk next to him.
Looking at the dozen or so thick books, Ran Qiuye felt that his little brain was not enough.
Does an experienced driver need to learn Maxwell's equations?
By the way, my mother mentioned that Li Weidong helped the rolling mill team design a lot of good things.
Is he going to invent again?
Well, that must be the case.
The driver, Comrade Li Weidong, never forgot his original intention. After hard work, he diligently studied on his own and finally...
Ran Qiuye had unknowingly conceived a promotional draft.
Looking down at the "People's Pictorial" in her hand, she lowered her head in shame.
Li Weidong scratched his head when he saw Ran Qiuye's little face turning red and white.
It seems rude not to say something at this time.
But it seemed wrong to say something.
"Let's watch together?"
"good...."
Ran Qiuye broke away from the embarrassment and quickly sat down and covered his face with "People's Pictorial".
Immediately he realized something was wrong and put down the People's Pictorial.
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 truly blessed to have an excellent teacher like you. "
"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.
The tip of the pen touched the paper, and she froze.
What's right, I'm a math teacher!
.......
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.
It can be said that he is now qualified to be Hu Guangliang's teacher with his attainments in physics.
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?"
"Okay, okay."
Ran Qiuye shook his sore hand and looked at the thick notebook speechlessly.
What did I do all morning?
........
"Goodbye, Teacher Ran!"
Li Weidong, who was anxious to go home and cook, said hello, got on his bicycle and was about to leave.
Out of the corner of his eye, he saw Ran Qiuye squatting on the ground, and he turned around again.
"What's wrong?"
"...The chain fell off."
Li Weidong packed up his bicycle and ran over, eagerly saying, "How about I give it a try?"
At this time, dense sweat was oozing out from Ran Qiuye's forehead.
In order to avoid soiling her new clothes, she could only pick up the bicycle chain with a wooden stick, but failed to pick it up several times. ….
For an experienced driver who often repairs bicycles, repairing a bicycle is just a matter of hands.
Li Weidong took the wooden stick, lifted it four or two times, and gently picked it up, and the chain returned to the toothed disc.
"Come on, try it."
Ran Qiuye rode on the bicycle obediently, with Li Weidong giving orders beside him.
"Kick."
"...I can't pedal."
"Harder."
"...I can't even push hard."
"Push hard."
"Click..."
The bicycle chain was broken into two parts, like a limp water pipe, hanging on the dusty ground.
Ran Qiuye:......
Li Weidong:......
I really didn’t expect that this little girl
My mother is very delicate and very strong.
There is no car repair shop near the library. The nearest car repair shop is three or four miles away.
Li Weidong felt bad about letting a little girl push a bicycle so far.
Fortunately, as an experienced driver, you must have a rope when going out.
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.
"Are you ready? I'm going to start."
"Okay, slow down a little bit."
Li Weidong pedaled lightly, "Let's go," and the bicycle drove slowly forward.
Pulled by the rope, Ran Qiuye sat on the bicycle and only needed to hold the handlebars steady.
The owner of the car repair shop, whose surname is Liu, wears a thin tawny coat, yellow clay shoes, and a broken straw hat even in the house in the winter. He is not afraid of becoming bald.
Although he has an eccentric personality, his craftsmanship is good and the price is very reasonable. Repairing the chain only costs five cents.
"Thank you so much today. If it weren't for you, I don't know what I would have done."
"I'm also responsible for this matter, so of course I have to be responsible. You're welcome."
Repairing the chain requires help from customers, and Li Weidong's hands inevitably get a little oily.
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.
"Case."
"How can this be so embarrassing..."
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.
"Comrade boss, do you have any soap?"
------------------
In the capital city, in the woods outside the ministry compound.
Hu Guangliang looked at the desolate scene around him, feeling a little frightened. He gathered his clothes and hurriedly came behind a stalwart figure.
"Weidong, why do you want to make an appointment here?"
"Don't you think there's a bad atmosphere here?"
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."
"..." Hu Guangliang swallowed and asked cautiously: "Aren't you preparing to install solar panels..."
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!"
That look was extremely tense.
That tone was particularly low.
With one hand in his pocket, the wind was blowing, his hair was messy, and the dust was rising.
Just like those people on TV who do bad things. ….
"...Brother, have you watched too many enemy agent movies recently?"
"You saw it..."
"..."
In this day and age, which man doesn’t want to catch enemy agents?
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 will work?"
Although he does not understand the specific manufacturing methods of solar panels.
However, toothpaste is used for brushing teeth, so how can it make equipment?
Li Weidong: "Let me ask you, what are the main ingredients of toothpaste?"
Hu Guangliang raised his eyelids: "Calcium carbonate, calcium hydrogen phosphate, silicon dioxide, aluminum hydroxide... silicon dioxide!"
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 a photovoltaic effect. When light shines on the surface of silicon dioxide, some of the photons are absorbed by it. The silicon material absorbs; the energy of the photon is transferred to the silicon atom, causing the electrons to migrate and become free electrons that accumulate on both sides of the PN junction to form a potential difference. When the external circuit is turned on, under the action of this voltage, there will be When current flows through an external circuit, a certain
Output Power. "
"Wonderful! It's so wonderful! Compared with monocrystalline silicon solar cells from Bell Labs, the cost of silicon dioxide is lower."
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%."
"80%..." Hu Guangliang's eyes widened suddenly.
As a university graduate who is committed to researching science and technology, although he works in a ministry, he has not given up studying cutting-edge technology.
Especially in ministries, you are eligible to have access to foreign academic journals.
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%.
Conversion efficiency is the proportion of solar energy converted into electrical energy.
The higher the efficiency, the more electricity a solar panel can produce with the same surface area.
Hu Guangliang originally thought that Li Weidong just had a whim and wanted to make a small toy.
Now we realize that solar cells may really have great potential.
Working in a ministry, Hu Guangliang has a deeper understanding of the domestic energy situation than ordinary people.
Most of the equipment in domestic power plants is imported from abroad. Not only is the quantity small, but problems often occur.
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.
Not to mention industrial production. When planning factories, ministries and commissions must first consider whether electricity can support it.
Although Li Weidong's solar panels are limited by sunlight and cannot provide continuous power supply, they are enough to meet the needs of ordinary households.
If it can be developed successfully, it will definitely be a good thing that will benefit the country and the people.
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. ….
Of course, these materials are very common chemical materials, are not dangerous, and do not violate any regulations.
.......
The total cost of purchasing materials was 1 yuan and 20 cents, and the most expensive ones were the double-layer capacitors.
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?"
"It's similar to a semiconductor, used to stabilize voltage."
Li Weidong placed the rectangular copper sheet on the table and used ferric chloride solution to draw neat circuit lines on the copper sheet.
After the lines are dry, ask Yu Li to help clean the copper pieces with alcohol.
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.
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.
"It should be almost done now, let's go to the compound and try it."
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?"
.......
eastward eastward
