Start with a college teacher

Chapter 247 Learning
In the next few days, the sun was just right, and the trajectory of the white clouds floating was also very good, just like Yang Ling's mood.

She has been immersed in inexplicable joy, like the silly white sweet that is very popular in later generations.

Most of the time, people don't realize how much a change in one thing has changed their own destiny. Only when they recall the past, do they know whether they did it right or wrong.

Being able to go abroad to Belgium this time is a life-changing event for Yang Ling, although she still doesn't know how this event will affect her.

She never thought that there would be a day when she would be able to go abroad. What could she do to participate in an international conference, and this opportunity came so unexpectedly.

Since getting the news these days, she has repeatedly thought about what she should do next. If Teacher Shen confessed to her, should she agree or refuse, what kind of words should be used, and what kind of tone should be used.

However, several days passed in a blink of an eye, and no one came to her, except for the college instructor who wanted to help her apply for a passport.

Thinking about it carefully, it seems that Teacher Shen has never looked for him, and it seems that he has to take the initiative, otherwise what should he do if others are disgusted.

So, she began to haunt Shen Guanglin's temporary office by chance, just to ask some difficult questions about physics, but she didn't say any words of thanks, just waiting for Teacher Shen to say something else.

A good-looking girl has never been short of suitors, and the love letters she received since she was a child can be used to make a fire, cook and survive in the wild.

However, at this moment, she was still looking forward to it, looking forward to when Teacher Shen would be able to confess her love to her.

People in this era are reserved and unrestrained, with unparalleled enthusiasm and piety.

She even planned to follow Teacher Shen back to the capital after graduation.

I don't know what's going on, is Mr. Shen too obsessed with scientific research these days, and he hasn't expressed more meaning to her.

When we met, it was just "Xiao Yang's classmate".

Why is it not at all like what others wrote in the letter, "My dearest and lovely Ling, there are some things I really want to say to you in person, but the words are coming to an end."

Shen Guanglin didn't even think about it, he just saw a pretty girl, so he just did it.

Anyway, this quota is not given to anyone, it is better to give it to a pleasing girl than to a burly man.

Women are less important than academics.

Shen Guanglin has been studying the "PN junction" of semiconductors these days. The concept of "PN junction" is not only used in the production of solar cells, but also has applications in many other aspects.

The principle is also very simple. P-type semiconductors and N-type semiconductors are fabricated on the same semiconductor substrate, and a space charge region is formed at their interface. This charge region is called a PN junction.

Since the PN junction has unidirectional conductivity, it is an important characteristic used by many devices in electronic technology, such as diodes and triodes.

The photovoltaic effect also uses the "electron concentration difference" generated by the PN junction to form a potential difference, thus converting light energy into electrical energy.

If solar cells want to generate more power, they must think about improving the photoelectric conversion efficiency.

In order to improve the photoelectric conversion efficiency, it is necessary to study the spectral response of various semiconductor materials.

This is also one of the focuses of Nankai University's research over the years.

Of course, limited by considerable conditions such as funds, the semiconductor materials they often use are silicon and selenium.

Materials are limited, but research methods are not.

Shen Guanglin feels that he has gained a lot from studying during this period of time.

Through his own testing in the laboratory, he has already understood the wavelengths of the spectral responses of the two semiconductor materials, silicon and selenium, which will help him when he turns to gallium arsenide or germanium materials in the future.

Silicon is such a good thing.

No wonder everyone likes to use silicon as a semiconductor material in later generations. In the field of photovoltaic power generation, because the spectral response wavelength range of silicon photovoltaic cells is 0.4~1.2μm, which is very wide, while the spectral response wavelength range of selenium photovoltaic cells can only be 0.38~ 0.75 μm.

Moreover, silicon materials are easy to manufacture and come from a wide range of sources, making them indispensable for all kinds of semiconductor materials.

Silicon cells can be studied in depth, such as monocrystalline silicon and polycrystalline silicon, but these are not the key breakthrough directions of Shen Guanglin. He still prefers gallium arsenide with the highest conversion efficiency. After all, the material properties limit the height of the ceiling.

Using silicon as a photovoltaic material, the theoretical maximum photoelectric conversion efficiency can only reach about 23%, while the photoelectric conversion efficiency of solar cells made of gallium arsenide materials can reach about 50%.

It's a pity that gallium arsenide will not be produced in China in this era, so the problem of raw materials is a bit difficult to solve.

This matter is either self-reliant, or can only seek help from foreign aid.

Fortunately, China's international living environment has been good in recent years. There has never been any restriction on importing equipment and materials. If our country has enough funds, it will be able to develop rapidly.

Unfortunately, there is no money.

During this time, Shen Guanglin was particularly fond of learning.

Learning makes people happy.

Shen Guanglin is studying in Nankai's laboratory with great interest, and the teachers of Nankai University are also teaching happily. Everyone is in a peaceful scene, but most of them are looking forward to going abroad as soon as possible.

Shen Guanglin was like a fish in water here, and soon became one of his own.

He is also very generous in his daily performance. Shen Guanglin's favorite thing to do is to treat big guys to dinner. There are many time-honored brands in Jinmen, and he can eat from family to family.

If you don’t come to Jinmen, I don’t know. It turns out that there is also roast duck here, and the name of the store is also very interesting, called "Zhengyangchun Duck House". In 1958, the chairman visited here and wrote an inscription on it.

Of course, if you want to eat a real feast, you have to go to a special hotel like Astor. The Astor is very famous. It was founded in 1863 and has a long history. It has witnessed the development of an era in Jinmen.Later, it was the only national cultural relic protection unit in the country.

Shen Guanglin is busy studying during the day and inviting teachers to dinner at night. He has been to Zhengyangchun, Lishunde, Qishilin, Dengyinglou, Huifanglou, Yongyuande, Yanchunlou, and Zhiweizhai. So enjoyable.

There are more time-honored brands in Jinmen than in Beijing, and the flavors are varied. There are both Muslim restaurants and Han restaurants, making people linger and forget to return.

Everyone felt emotional. Some teachers even said that Professor Shen should stay in the capital. There are not only delicious food here, but also interesting things. The scenery in the traditional concession area is still good.

Shen Guanglin knew the place they were talking about, and had already been there once. That place was called Wudao, and it was actually the former British Concession.

A certain Shen lingered on daily delicacies all day long, and didn't even notice that there was a beautiful woman waiting for him to confess. The girl was reserved and looked at him eagerly, waiting for his next move.

It's a pity that Shen didn't understand the style, and he didn't make any moves until he was going to Brussels.

　In the past few days, my head has been dropped, it's a bit serious, the tinnitus is severe, and I'm shaking a bit, so it may affect the update, forgive me
　　
　
(End of this chapter)