Let You Take Charge of Xihong City, It's the World's First City Now?

March 1.

School of Modern Engineering and Applied Science, Xihong University, Optoelectronic Experimental Teaching Center.

in front of an office.

Li Shaohong, a freshman, knocked on the door respectfully.

"Come in!"

A stern voice came.

Li Shaohong pushed open the door cautiously and came to a professor over 50 years old.

He said politely: "Professor Dai, I am Li Shaohong, a freshman majoring in optoelectronic information science and engineering.

I recently wrote a paper, both in Chinese and English.

Could you please give me some pointers?

Hear this.

Dai Zhengyuan was a little surprised.

Generally speaking, freshman students engage in GPA, sophomores engage in competitions, and juniors engage in essays.

Xihong University was established just last year.

There are only freshmen, freshmen, and freshmen in the school.

If the first-year graduate student and the first-year Ph.D. student come to him to guide the thesis, it is very common.

But it is extremely rare for a freshman to come to him.

"Okay, teacher, take a look at it for you.

Dai Zhengyuan smiled and nodded.

He put the U disk handed over by the other party into the USB port of the computer and read the paper.

"Little Li, what field are you writing about? 95

Li Shaohong said truthfully: "Professor Dai, I am writing a paper in the field of photovoltaics."

Hearing this, Dai Zhengyuan nodded.

His field of study is optoelectronics.

When students come to him for advice, they are asking the right person.

After reading the thesis.

The title appeared on the screen, titled "High-efficiency all-perovskite tandem solar cells."

"All perovskite tandem battery? 35

Dai Zhengyuan's eyes lit up and he became interested.

Solar photovoltaic power generation has always been the focus of research in the industry.

Existing crystalline silicon solar cells have achieved large-scale applications, but their photoelectric conversion efficiency is approaching the limit efficiency of industrialization.

22 In simple terms, the cost of photovoltaic power generation is closely related to cell efficiency.

The absolute value of every 1% increase in battery efficiency.

The cost of photovoltaic power generation can be reduced by 7%.

Therefore, the photovoltaic field is actively developing new photovoltaic technologies with higher efficiency, hoping to break through the limit efficiency of traditional crystalline silicon cells and further reduce the cost of photovoltaic power generation.

The all-perovskite tandem solar cell is a new photovoltaic technology in the field of international frontier science.

Dai Zhengyuan took a deep breath and browsed the paper patiently.

The paper states:

The construction of tandem batteries is the most effective way to greatly improve the battery efficiency.

The theoretical efficiency of double-junction tandem cells can reach 45%, which is much higher than the S-Q limit efficiency of single-junction cells, which is 33%.

Although the traditional III-V semiconductor tandem cells have achieved high efficiency, the fabrication process is complex and expensive.

The perovskite/perovskite tandem cells constructed by tandem wide/narrow bandgap perovskite sub-cells can combine the outstanding advantages of high efficiency and low cost.

Li Shaohong proposed an atomic layer deposition technology to prepare a new tunnel junction structure with a thin dense semiconductor layer and an ultra-thin metal cluster layer, which greatly simplifies the preparation process of all perovskite tandem cells and significantly improves device performance. promote.

Next, he regulated the crystal growth process of narrow-bandgap perovskite through the oxidation of stannous ions Sn2+ inside and on the surface of perovskite grains.

This effectively reduces the defect state density of the film, increases the carrier diffusion length, and overcomes the core bottleneck problem that limits the efficiency of all-perovskite tandem cells.

He has successively achieved conversion efficiencies of 24.8% and 25.6% in small-area tandem cells, and developed a large-area all-perovskite tandem cell with 24.2%!

Dai Zhengyuan looked at the paper and became more and more shocked.

The 24.2% all-perovskite tandem battery is a genius study.

Such high efficiency has broken the world record in the field of all-perovskite tandem cells!

If you continue to research deeply.

All perovskite tandem cells are expected to surpass crystalline silicon cells and create a milestone in the field of photovoltaic power generation!

The paper has written dense experimental data in detail, which can be said to be well-founded and convincing.

Check out the entire paper.

Dai Zhengyuan felt turbulent in his heart.

Is this really a paper that a freshman can write?

He was amazed that a doctoral student could write such a thesis.

Not to mention that Li Shaohong is only 18 years old and a freshman.

Wouldn't he have copied it from a foreign website?

thought here.

Dai Zhengyuan, with a skeptical mind, logged on to the thesis check website, and uploaded the entire paper.

The repetition rate is 0.3%!

Qualified can no longer be qualified.

Dai Zhengyuan raised his head, looked at Li Shaohong sharply, and asked, "You really wrote this paper?"

"Professor Dai, I really wrote the paper!""

Li Shaohong, who was still somewhat restrained before, now has a firm expression on his face.

Li Shaohong said: "Professor, in order to write this paper, I didn't even go home for the New Year this year.

The School of Modern Engineering and Applied Science of Xihong University has a high-standard scientific research building of 65,000 square meters, with all kinds of high-end instruments, which are very suitable for experiments.

Before I knew it, I was soaking in the laboratory, which has become routine.

When each functional layer is combined into a solar cell, the sunlight is not only converted into the jumping numbers on the instrument through the band gap, but also reflects the colorful light in my heart.

All perovskite tandem batteries are extremely competitive.

Domestic research is not as good as global researchers in related fields.

I hope to do my part to surpass them in the new photovoltaic field!

"very good!

Dai Zhengyuan looked at Li Shaohong's clear eyes and nodded with satisfaction.

Qiji thousands of miles, not a day's work.

Li Shaohong is a freshman, but he can stand boredom and is willing to spend more time studying.

He is undoubtedly a good seedling of scientific research!

Dai Zhengyuan said with relief: "Xiao Li, your paper is shocking, and I have nothing to advise you.

The only flaws that can be found are in the typesetting and the wording of details.

Put the paper here first, and I'll change it for you.

"Thank you Professor Dai!

Li Shaohong quickly thanked.

Dai Zhengyuan continued: "But you can't publish this paper! 55

"Ah? Why is this?

Li Shaohong wondered.

Dai Zhengyuan said bluntly: "In this paper, your experimental result is to develop a large-area all-perovskite tandem battery with an efficiency of 24.2%.

If you want your paper to be listed in a top journal, you must have an authoritative third-party testing agency to conduct professional testing on the all-perovskite tandem battery you have developed.

Authoritative institutions recognized in the field of photovoltaics include the National Renewable Energy Laboratory of the United States, the Neon Industrial Technology Comprehensive Research Institute, the Neon Electrical Safety and Environmental Technology Laboratory, the German Fraunhofer Institute for Solar Energy Systems, etc. 7 third-party testing agency.

"Ah? So troublesome?"

Li Shaohong scratched his head, a little depressed.

Dai Zhengyuan said kindly: "I have some contacts in the photovoltaic field, so I can help you contact the testing agency for the most professional testing.

"Thank you Professor Dai!

Li Shaohong thanked him from the bottom of his heart.

If he was asked to personally go to these top testing institutions in the world, they would simply ignore him.

Fortunately, there is Professor Dai to help!

Dai Zhengyuan asked, "Xiao Li, have you decided which journal to submit to?"

"Nope!"

Li Shaohong said truthfully: "I just finished my thesis, and I came to you for guidance. I haven't decided which one to vote for.

Dai Zhengyuan was in a good mood at the moment.

He explained patiently: "The three top international academic journals are "Nature", "Science", and "Cell". As long as you can publish a paper in these three journals, you It is useful to publish more papers in common journals.

Hearing this, Li Shaohong nodded.

Three top academic journals, he has long been thunderous.

"nature", a natural science journal, with an impact factor of 43.070.

Nature Journal, the world's earliest international scientific journal, was founded in 1869, consistently reporting and commenting on the most important breakthroughs in global science and technology.

The journals cover life sciences, natural sciences, clinical medicine, physical chemistry and other fields.

"Science", a scientific journal, with an impact factor of 41.037.

Scientific Journal is an academic journal published by the American Association for the Advancement of Science and is one of the most authoritative academic journals in the world.

It mainly publishes the latest scientific research results, covering various disciplines.

"cell", cell journal, impact factor 36.216.

It is the best journal in the field of biological sciences, mainly publishing the latest research findings in the field of life sciences.

Li Shaohong is very clear that if his paper can be published in these three top academic journals, it will be of great benefit to him in terms of postgraduate entrance examination, employment, and academic research in the future.

Dai Zhengyuan suggested: "Since you have no idea which one to vote for, then vote for the journal "nature" with the highest impact factor.95

"Thank you professor, I will listen to you.

Li Shaohong thanks again.

Looking at the background of Li Shaohong's departure, Dai Zhengyuan felt a little emotional.

The back waves of the Yangtze River push the front waves.

A generation is stronger than a generation.

What a great freshman right now!

Didn't wait for him to feel finished.

There was another knock on the office door.

Dozens of students came to him.

"Professor Dai, my paper is titled "Elastic Ice Single Crystal Micro-Nano Fiber", please give me some pointers!

"Professor Dai, my paper is titled "Nonlinear Control of PT Symmetry and Non-Hermitian Topological States", I hope you can give me some pointers. 35

"Professor Dai, my paper is titled "Table-top 093 Free Electron Laser Driven by Laser Wake Field Acceleration", I would like to ask you to give me some pointers."5

"Professor Dai, please give me some pointers! The title of my paper is "Three-Dimensional Heterogeneous Integrated MoS2-TFT High-Resolution Micro-LED Display Technology"."

"Professor Dai, give me some pointers too! My paper is "High Efficiency Broadband Achromatic Metalens for Near Infrared Bioimaging Window".

"Professor Dai, I also have a paper here that I would like you to point out. The paper is titled "Discovering 'Ghost' Double-Sided Polarons in Birefringent Crystals".

",..."

Heard numerous requests from students to point to papers.

Dai Zhengyuan's mouth twitched, a little speechless.

On weekdays, there are students who ask him for guidance, and he is naturally gratified.

But at the same time so many people come to give pointers.

This is a bit of an exaggeration!

In addition, he is not qualified to point out any papers.

The titles of these students' papers are so high, and he doesn't understand it, okay?

Pointing?!

Point your ass!

You freshmen, all of you are so good at academics, I would ask you to give me some pointers...

at the same time.

The tutors and professors of various universities and colleges in Xihong City, like Professor Dai Zhengyuan, have received requests for thesis guidance from students.

Students' dissertations cover life sciences, mathematics, physics, chemistry, materials, computers and other fields.

The professors didn't expect it.

Why did a freshman who just became a freshman suddenly become interested in academic research?

The students of Huaqing Yan University are not as eager to learn as you are!

In a responsible attitude towards students.

Professors in various disciplines rigorously help students revise their papers.

I don't know if I don't see it, but I'm startled when I see it.

Each of these papers is of extremely high quality, and many of them are landmark scientific research achievements in the discipline.

And the journals they want to submit are all top academic journals such as "nature", "science", and "cell".

Professors of all disciplines are happy to see this.

They were busy in an instant, helping students with the typesetting of their papers, modifying the format of their papers, and so on.

while busy.

The professors were all moved.

The overall educational and academic atmosphere of Xihong City is really strong.

For a long time.

Urban education in Xihong City will reach a new level!