I Have a Research Support System

Seeing that the new junior junior girl Han Jiaying was also there, Xu Qiu called her over.

He was going to give her an introductory guide while making the device, and by the way, see how the savvy girl is, and whether she is a good material for scientific research.

When Chen Wanqing was teaching him, he used the method of squeezing toothpaste, that is, teaching him various experimental operations step by step.

However, Xu Qiu's preferred teaching method is first the whole and then the part.

That is to first understand the entire operation process roughly, and then learn each step of the experimental operation in fragments.

First of all, it is necessary to understand the learning progress of the school girls.

Han Jiaying, you've been in the lab for a week, what have you learned?

Sister Chen Wanqing taught me the safety rules of the laboratory this week, and also taught me how to clean the substrate, Han Jiaying said:

Other than that, there seems to be nothing else. Is Senior Brother Xu Qiu going to teach me other experimental operations?

Well, I'm going to make a batch of devices today. You can follow me and watch my experiment. You can ask any questions at any time. Xu Qiu said.

Okay. Han Jiaying nodded.

Have you used the lab coat, and you can still take basic protective measures. Xu Qiu said.

I've used it, and my sister taught me the protective measures before. Han Jiaying said.

Okay, come with me to the lab.

...

Entering the laboratory, before Xu Qiu could speak, Han Jiaying volunteered:

Brother, are you going to make a device? Let me help you clean the substrate.

This school girl is on the road.

Okay, you don't need too much. For today, 12 tablets are enough.

After Xu Qiu finished speaking, he entered the spin-coating glove box and began to prepare the solution.

The results of this experiment are not important, just to get data for the group meeting on Monday.

Therefore, he intends to use chlorobenzene as a solvent that dissolves polymers better.

After the preparations were completed, he did not start preparing the solution immediately, but waited patiently for Han Jiaying.

After she put the box containing the substrate into the ultrasonic cleaner, she came over and stood beside Xu Qiu.

This is the polymer material I synthesized in Zhangjiang this week, and I will use it as the active layer material to prepare devices. Xu Qiu introduced:

This is PC[70]BM, which is a commonly used acceptor material in organic photovoltaics. The polymer material just now is a donor material.

When weighing, it is necessary to weigh the polymer material that is difficult to weigh first, then weigh the weighed powder PCBM, and finally add the solvent and magnetic stirrer.

Han Jiaying listened carefully, and she nodded every time Xu Qiu said a word.

However, she did not speak and asked questions.

Probably the two are not familiar enough, and the relationship between people needs time to slowly draw closer.

Xu Qiu didn't intend to be too proactive, but just introduced it on her own. Anyway, she can learn something after explaining it this way.

At this time, the ultrasonic cleaning instrument will automatically stop when the set time is reached.

Brother, I'm going to change the solvent.

Go.

A few minutes later, Han Jiaying returned.

To prepare the prepolymer solution of zinc oxide, zinc acetate dihydrate, 2-methoxyethanol and ethanolamine are used. Xu Qiu continued:

Mix it according to a certain ratio, put it on the heating and mixing table, and it will be ready to use in about two hours.

Ten minutes later, Xu Qiu prepared two solutions, left the spin-coating glove box, and planned to go back to his desk to rest for a while.

Han Jiaying pointed to the glove box, hesitated for a moment, and finally said:

Brother, this instrument is a glove box, can I try it?

Seeing her expectant yet cautious look, Xu Qiu smiled and said:

Okay, I'll teach you by the side.

Although this will take up some of his time, Han Jiaying is his direct junior after all, so it is worth putting in some energy.

Just like me back then, when I encountered problems in the experiment, when I went to consult my senior sister, she was always responsive.

It is filled with nitrogen, mainly to provide a relatively inert atmosphere to ensure that the device will not encounter oxygen or water molecules and deteriorate.

After Xu Qiu finished speaking, he pointed to the pedals on the ground:

These two are to control the air pressure in the glove box, the one on the left is the step-down, and the one on the right is the boost.

Generally, the step-down pedal on the left is used, and the boost pedal is rarely used, because if the air pressure in the glove box is insufficient, it will automatically replenish air.

When you enter the glove box, you have to step on the step-down pedal while slowly reaching your arm.

Similarly, when coming out of the glove box, it should be done slowly.

Xu Qiu demonstrated it twice in slow motion and asked, Have you learned it yet?

Understood, senior brother, let me do it. Han Jiaying nodded and said.

Her movements were relatively slow, but there was no problem, and both hands reached into the inside of the box.

Xu Qiu stood behind the junior girl, looking at her.

Han Jiaying's height is about 165, which is about the same as Chen Wanqing's. They are also similar in figure, but they can be easily distinguished from their hairstyles. The former has double ponytails, while the latter has long black and straight hair.

When doing experiments, Hei Changzhi must be tied up, otherwise there may be safety hazards, and the double ponytails do not have so many troubles.

Next, Xu Qiu gave her a detailed introduction to the working principle of the glove box, how to use the transmission cabin and the control panel, and so on.

At this time, the ultrasonic cleaner stops again.

Han Jiaying came out of the glove box with some reluctance, and said, I'm going to deal with the substrate.

Xu Qiu didn't have anything to do, so he simply walked to her side and watched her experiment.

Han Jiaying seemed a little nervous, and even more nervous when she saw him standing beside her.

Under the double stimulation, the first substrate she picked up was blown away by the airflow from the nitrogen gun.

She glanced at Xu Qiu with some embarrassment, seeing that he didn't mean to blame, she leaned over to pick up the substrate and put it into the old substrate box.

Xu Qiu handed her a pair of tweezers and said, This kind of flat tweezers are better for gripping the substrate, you can try it.

Han Jiaying tried it, and said with emotion: It's really good.

Xu Qiu originally planned to ask, Didn't Chen Wanqing teach you? But then she thought about the scene when she taught herself, and often missed the key points.

In terms of experimental operation, I mainly rely on imitating the system image by myself and constantly exploring, which can be regarded as a lot of detours.

It seems that this school girl still needs to guide herself well, she is a bit unreliable.

...

After cleaning the substrate, Xu Qiu continued the experiment, spin-coating zinc oxide, spin-coating the effective layer, vapor deposition, and testing.

He was operating and explaining.

Han Jiaying seemed to find out later that senior brother Xu Qiu was more responsible and easy to talk to.

He was no longer as reserved as he was at the beginning, and started chattering non-stop.

Why is there a transport layer?

Why thermal annealing?

Why is the evaporation rate of metal electrodes so fast, but molybdenum trioxide is relatively slow?

Xu Qiu didn't get impatient either, and explained the students' doubts one by one.

Finally, the highest efficiency of this batch of devices reached 9.23%.

As a result, the control was just right, and Xu Qiu was very satisfied.

Thanks to Lan Shiyu and Lanzang Wenyuan for rewarding 500 starting coins, and God and Light for rewarding 100 starting coins.