I really don't want to lie down and win

"Do you know the speed is faster than thought?" Xu Mang asked again.

"..."

"What is it?" Yang Xiaoman's face was full of doubts. She looked at Xu Mang with a hint of love and curiosity in her eyes. At this moment, she portrayed an ignorant girl to the bone marrow.

"It's my speed of escape." Xu Mang sighed, glanced at Xiaoman, and said silently, "You're an airport!"

Yang Xiaoman: ￣︿￣

Xu Mang: εεεεεε┌;┘

What is life?

What is life consciousness?

In the past, Xu Mang believed that life was about fighting hard and following his own dreams, but now Xu Mang believes that the meaning of life is to constantly challenge the limit and constantly test death. Only when he has truly experienced the feeling of dying, will he know What is life and what is the meaning of life.

quickly,

Xu Mang was captured by Xiaoman, and was beaten half to death by her in the hotel room, but once again he knew the importance of being alive. It turns out that being able to breathe is such a happy thing.

"You said you..."

"You know you will be beaten by me, why do you keep provoking me?" Yang Xiaoman said angrily, "It's been a few times...you...do you really belong to the kind of people who shake the M attribute? ?”

"What!"

"Don't think about it." Xu Mang said helplessly, "Anyway, you don't understand, this is called experiencing life."

Experience life?

Being beaten by my old lady is called experiencing life?

Yang Xiaoman was confused by Xu Mang's weird idea, and finally gave up on the questioning. Anyway, he couldn't ask anything, and he might drive himself to death.

A few days in Hawaii,

During the day, he spends time visiting, such as Waikiki Beach, Oeo Rapids Canyon, etc., and at night, Xu Mang will take a little time to sort out the difficulty of applying perovskite in solar energy, not to mention... Not so difficult.

Since the first perovskite photovoltaic device appeared ten years ago, its photoelectric conversion rate was 20.00%, which was so poor that it was unimaginable. Then, in the year before last, the conversion rate was increased to [-]% [-], already surpasses typical commercial silicon panels.

but...

The efficiency of perovskite is based on the measurement of tiny samples less than one square centimeter, and the efficiency will not increase with the expansion of the area. In contrast... the efficiency of silicon cells will be greatly improved when it is expanded to 180 square centimeters.

For this embarrassing situation, Xu Mang has a solution, but there is no such condition for the time being.

this day,

It's the fifth day of our vacation in Hawaii,

Xu Mang and Xiaoman were walking on the street, but as they walked, they passed by a university called Hawaii Pacific University. I heard that this university is a famous private university, and it was rated as the best western university by Princeton Review. Yes, but it seems awesome.

"Whee!"

"You don't know that, do you?" Yang Xiaoman began to popularize science for Xu Mang, and said with a smile: "There are eleven colleges under Pacific University, with more than 80 undergraduate majors, the most famous of which are Business School, School of Engineering and Computer, School of Music."

"what?"

"Oh..." Xu Mang nodded, and said with a look of disgust, "Then I won't go...no fun!"

"and many more!"

"Your wife, I am a big shot in the business world. Do you know how many lecture invitations I have received from famous universities?" Yang Xiaoman raised his head proudly, and said with a smile: "I received an invitation from Pacific University Business School half a year ago. .”

words fell,

Holding Xu Mang's hand, he said proudly, "Let's go...listen to my mother, I will teach you a lesson."

Xu Mang:? ? ?

Not to mention,

When the senior executives of the Pacific University's business school knew that Mr. Yang was here, they were excited. However, they never expected that not only Mr. Yang from Xu Yang Company, but also the world-renowned physicist, Xu Mang, would come. The professors are here.

director's office,

Dean Justin's face was full of excitement. If Mr. Yang's arrival was to increase the reputation of the business school, then Xu Mang's appearance pushed the reputation to its peak, and he never expected that these two would be husband and wife.

......

8 Chapter 2 Questions left by Professor Xu (2/[-])

A huge classroom,

Yang Xiaoman was on stage talking about his family history and the case of using finance to like foreign markets, while Xu Mang was sitting in a corner, dozing off boredly. Many students come to attend classes.

hell...

I feel that Xiaoman is much more famous than myself, what's the situation?Shouldn't these people be more obsessed with themselves?

What is the situation?

Xu Mang took out his mobile phone to take a picture of his face, and found that he was still so handsome, even more handsome than before. In the past, he was young and frivolous, with a feeling of chasing the wind, but now he is more mature and stable, I have to say. ..it's just so cool.

bored,

Xu Mang took out a pen and a notebook from his bag, and started researching on the application of perovskite in solar energy. Of course, he couldn't do without his mobile phone, and some information could only be found online, although there were still a lot of reprints in his brain. The data, but the database has been updated, and I am usually so lazy...

According to the tandem structure proposed by Xu Mang, from the perspective of solar energy, the important property of these materials is that incident light causes their negatively charged electrons to enter a higher energy state, leaving vacancies or holes, which act like positively charged particle of.

If these charged electrons and holes can avoid recombining long enough and reach the electrodes above and below the perovskite film, current can flow.

Theoretically so,

But there are many problems. For the time being, they do not have the ability to manufacture large-scale high-efficiency battery grids. The problem is that it is more difficult to produce uniform coatings on larger sizes. However, Xu Mang proposed to use transparent electrode films to collect current.

Facts have proved that it does not work. These electrode films can allow a lot of light to pass through, but they also have a slight resistance, which will block some current. In larger sizes, the problems caused by this resistance are more prominent, and they cannot be expanded like silicon panels. area to increase the conversion rate.

Xu Mang did a simple calculation. The efficiency of a 20.00 square centimeter perovskite battery is 35%, but when 12.00 grids are combined into a [-] square centimeter module, this ratio drops to [-]% %.

but...

Even so, perovskite batteries are easier to produce than silicon batteries, and they are also cheaper. Xu Mang has investigated the process of making silicon, which needs to be heated at [-] degrees. When preparing high-purity slabs, the material needs to be Dissolved in three hundred degrees of hydrochloric acid.

On the contrary,

Perovskite cells require only an inkjet printer to deposit a small amount of material onto a plastic film.