Chen Jing turned his head and whispered with Dr. Wu.

Chen Zhou turned his attention to the experimental device.

Just now, Dr. Wu's words reminded him.

In diamond doping experiments, carrier concentration will affect Hall mobility.

The Hall mobility directly reflects the doping degree of boron element in diamond.

In addition, the doping of boron element is achieved by adding a boron source to the reaction chamber where the diamond film is prepared by mpcvd method to achieve boron doping of diamond.

For boron sources, boron-containing gases are generally used, such as b2h6 and b(ch3)3.

When the doping concentration of boron is high, the prepared diamond doping contains many point defects, line defects and surface defects.

These defects can capture carriers, affect the Hall mobility of diamond materials, and thus affect the prepared boron-doped diamond.

"Sure enough, whether it is the preparation of the diamond film itself or the preparation of single crystal diamond under doping experiments, it is a contradictory experiment..." Chen Zhou thought to himself.

After thinking about it, Chen Zhou said to Dr. Wu and went to the n-type doping experiment.

As Dr. Wu said, n-type doping is much more difficult than p-type doping.

For p-type doping, we can also refer to this natural sample.

However, n-type doping can only be explored continuously.

Speaking of which, the n-type doped phosphorus element is explored step by step from nitrogen, sulfur, and lithium elements.

The covalent bond radius of phosphorus is 1.4 times that of carbon, and the energy level is 0.58mev below the bottom of the conduction band.

Because of these properties, phosphorus can form shallow energy levels in diamond films, so it is an ideal element to achieve n-type doping of diamonds.

However, the carrier mobility of n-type phosphorus-doped diamond is still much lower than that of p-type boron doping.

Chen Zhou found Peng Fei and asked softly: "How is the experiment going?"

Peng Fei pointed to the ongoing experimental device: "It's okay, it's not much different from the previous few times."

After a pause, he looked at Chen Zhou and said with a smile: "It depends on the result of your processing of the data."

Hearing this, Chen Zhou smiled and said, "Let's do our best."

Peng Fei said again: "If you need help, just say it."

Chen Zhou nodded: "Don't worry, I won't be polite."

After saying that, the two looked at each other and smiled.

Compared to others, Peng Fei, who was arranged to pick them up at the high-speed rail station at the beginning, gave Chen Zhou a much more comfortable feeling.

After thinking about it, Chen Zhou asked, "What is the doping concentration of phosphorus in diamond now?"

Peng Fei did not answer directly, but said: "Because the doping concentration of phosphorus directly affects the carrier mobility, when the carrier concentration is low, the scattering of ionizing impurities has less impact and the mobility is higher."

"In 2012, Dr. P et al. increased the room temperature carrier mobility to 780 cm2/(v·s) by reducing the doping concentration of phosphorus in (100) crystal surface diamonds."

"So, based on them, we further reduced the doping concentration of phosphorus. The doping concentrations of these 10 groups of experimental phosphorus were selected in sequence within the interval of 4×10^15/cm~2×10^15/cm. of."

Chen Zhou nodded, and the 10 sets of experiments were compared with each other.

Chen Zhou remembered another thing and asked, "Tomorrow's co-doping experiment was also carried out by you?"

Peng Fei replied: "That's right. The co-doping experiment is actually n-type doping. However, whether it is the mpcvd method we use during the growth process or the ion implantation method, using a single element to dope it. It is still difficult to achieve n-type doping of diamonds."

"But it is much easier to achieve n-type conductivity of diamond by mixing two or more elements into diamond."

After a pause, Peng Fei continued: "In single element n-type doping, neither nitrogen nor sulfur are suitable options. However, in co-doping, boron and nitrogen are co-doped, boron and sulfur are co-doped.

, and the co-doping of phosphorus and nitrogen can achieve the conductivity of diamond."

After hearing Peng Fei's words, Chen Zhou turned to ask: "This topic is mainly about the preparation of diamond and diamond semiconductor materials. What about the research on properties?"

Peng Fei pointed to Dr. Wu in the distance and said, "Dr. Wu's other research team is responsible for studying the properties and applications of diamond semiconductor materials."

After saying that, Peng Fei glanced at Chen Zhou and chuckled softly: "What? Are you interested in the application of the properties of diamond semiconductor materials?"

"Somewhat interested." Chen Zhou did not deny it, but instead talked about the particle accelerator's diode experiment and told Peng Fei.

After hearing this, Peng Fei looked at Chen Zhou in surprise: "I didn't expect you to have already participated in such a physics topic?"

Chen Zhou replied: "This is the subject of President Yang of the Academy of Arts, and I am responsible for the data processing part."

Although Chen Zhou said it simply, Peng Fei heard a different meaning.

The research on nuclear physics can be attributed to the aspects of high-energy physics. In China, it is basically a project of the national key laboratories.

Chen Zhou has been involved in such a project now, and I have to say that it is very awesome.

Peng Fei thought about it and said, "If you are interested, you can tell Dr. Wu that after the problem is solved, you will join the next one. Moreover, Huake Group's 38th Institute is currently conducting dilute magnetic semiconductors.

The research on this thing is also widely used in nuclear physics.”

Chen Zhou said softly: "Forget it, I haven't prepared my academic report to the United States next month."

Peng Fei smiled and said, "Yes, I almost forgot that you are a math. Speaking of which, this is an international academic exchange conference, I envy you..."

Chen Zhou also smiled, and the two of them stopped talking and focused on the experimental device.

The two groups of experiments took a long time, and in one morning, it can only be said that the experiment was only halfway through.

Chen Zhou and Shen Jing, who had been in the laboratory for a whole morning, discussed it during lunch.

Half a day in the morning, the two of them had fully understood the mechanism of the experiment.

Especially Shen Jing, through communication with Dr. Wu, his understanding of this experiment is no less than that of Chen Zhou.

Of course, it is limited to the present.

In two days, only he will know whether this guy will forget it.

And in the afternoon, if the two of them stay in the laboratory for a long time, it doesn't make much sense.

Therefore, Chen Zhou and Shen Jing discussed and first asked Dr. Wu to get experimental data and start the specific data analysis work.

What the two of them did not expect was that when they finished their meal, Peng Fei took them to Dr. Wu's office.

Dr. Wu was operating on the computer. When she saw several people coming in, she said directly: "I guess you are bored in the laboratory. I have sorted out the experimental data just now, and you can conduct data analysis in the afternoon."

"There are some other things that I have made the preliminary processing of the data, which you can refer to."

Chen Zhou and Shen Jing looked at each other. Doctor Wu understands so much, right?

But then Chen Zhou thought of something and couldn't help but mutter in his heart: "Can it be Dr. Wu who processed the data well, right? This is so embarrassing..."

Dr. Wu said again: "However, because the subject is confidential, you can only use the computer in the institute to work and cannot take it back to the hotel."

Chen Zhou and Shen Jing nodded at the same time, expressing their understanding.

After all, it is a topic of Huake Group. If it is not involved in confidentiality, it will make the two of them even more surprised.

A small office with two computers.

It just so happened that Chen Zhou and Shen Jing each one were one.

The two of them were here in the afternoon.

Chen Jing turned on the computer, clicked on the information casually, and asked while watching: "Chen Zhou, let's conduct data analysis first?"

Chen Zhou thought for a while and nodded: "Let's do data analysis first, and go back to continue researching the preparation process in the evening. Both are also related."

Chen Jing looked at Chen Zhou, What a guy, you really have energy...

As if he knew Chen Jing’s idea, Chen Zhou looked at the senior and said with a smile: “It’s already started, so there is no need to delay. Now that the experimental data is available, let’s grab it with both hands.”
Chapter completed!