I Have a Research Support System

The next day, after breakfast, Xu Qiu came to the first floor of the materials at around eight o'clock in the morning.

He had opened the access control system of the laboratory before, so he could directly swipe the campus card to enter the laboratory.

At this time, neither Teacher Wei nor the rest of the lab had arrived.

His main concern is the latter, if he comes early, no one will compete with him for the glove box.

Yesterday, before Xu Qiu left, six sets of solutions were replenished temporarily, plus the first set prepared, a total of seven sets of solutions.

Eight substrates remained, just enough to allocate two to the optimal condition solution and one to each of the other solutions.

...

After spin-coating the effective layer, Xu Qiu began to wipe the film.

At this moment, he suddenly heard a da da da sound coming from the corridor.

The voice was that of Teacher Wei.

After staying in the laboratory for a long time, Xu Qiu was already familiar with the sound of leather shoes.

He has always been curious, did Teacher Wei deliberately make a sound to remind his students that he is coming?

Wei Xingsi walked to the door of 216, and saw that the light inside the door was on. He was a little surprised, stretched out his hand, and glanced at his watch. The time was 8:50.

So, he opened the door and entered, only to find that there was no one at the desk, only a schoolbag on the chair.

He looked back at the lab.

Isn't that Xu Qiu?

Hello, Teacher Wei. Xu Qiu stopped what he was doing and greeted him proactively.

Xu Qiu, why did you come so early? Wei Xingsi asked.

If you come later, Wu Feifei and Chen Wanqing will use the glove box, and I can't grab them. Xu Qiu said.

Hearing that this was the reason, Wei Xingsi smiled and said:

You should take the initiative to do the experiment. When I was abroad, I also robbed the glove box with my brother and the others.

Xu Qiu didn't know how to respond, so he smiled awkwardly.

By the way, how is your work doing recently? I've been hearing Chen Wanqing praise you all the time, saying that you've helped her a lot. Wei Xingsi said.

I am currently working on flexible substrate devices. I just made the first batch yesterday. The PTB7-TH system used has an efficiency of up to 6.9%, and the P3HT system is more than 4%. I plan to make another batch of devices today. I feel that by optimizing the conditions, the efficiency can be further improved. Xu Qiu said.

It can achieve 7% efficiency, that's not low. Have you read the relevant literature, and has anyone else done software for the PTB7-TH system. Wei Xingsi said.

No, they are all based on other systems, mainly the P3HT system. Xu Qiu said.

That's great. Let's see if the efficiency can be raised. If it can reach 8% or 9%, you can post a small article. Wei Xingsi said.

Wei Xingsi originally wanted to pat Xu Qiu on the shoulder, but when he saw that he was wearing a lab coat, he withdrew his hand and said:

Okay, then you are busy, report the results to me after the test today.

Okay. Xu Qiu said.

Xu Qiu was a little puzzled that he could actually post an article.

When the senior sister mentioned the flooding phenomenon in the academic circle before, he still felt that the flooding of papers was far away from him, but he didn't expect it to be his turn now.

However, it is the first article after all, so just fill in the water, and you have the right to accumulate experience for your future scientific research.

...

Around 9:30, Wu Feifei and Duan Yun also came to the laboratory one after another.

Xu Qiu has finished spin-coating, put the sample into the vapor deposition chamber, start vacuuming, and prepare for vapor deposition.

As soon as Chen Wanqing entered the laboratory, she heard the noise of the mechanical pump. Upon closer inspection, it turned out that Xu Qiu was actually using it.

Student, when did you come? Chen Wanqing asked.

It's past eight o'clock. I met Mr. Wei just now, and he told me to grab the glove box with you.

Pfft—— Chen Wanqing laughed out loud: This is indeed like his speaking style, what else did he say to you?

I told him yesterday's test results, and he said that he could post a small article. Xu Qiu said.

Really, you haven't told me about yesterday's result, is it very efficient? Chen Wanqing said.

About 7%, PTB7-TH system. Xu Qiu said.

Not bad, Chen Wanqing said:

If the efficiency is higher, it is estimated that you can publish a journal at the end of the crane in the second district, such as ACS Appl. Mater. Interfaces, or RSC Adv. in the third district.

I didn't expect my junior to have an article just two months after joining the group.

I didn't think about it either. I just wanted to complete the project that Teacher Wei gave me before. Xu Qiu said.

The school's projects are easy to talk about, he just gives you practice, even if the efficiency test is 1%, as long as the characterization is complete, the PPT has a few more pages, the final report looks fuller, and it is easy to pass the project acceptance, after all It's an undergraduate project.

Actually, it's not too difficult to publish articles. It's relatively easy for the second and third districts, as long as the efficiency is about the same, and there is a little novelty, which is different from others.

If I had done the PTB7-TH system when I first got started, it might be faster to produce results, but it is estimated that it will cost a lot of materials.

At that time, the conditions of evaporation were the most difficult to touch, because during the whole process of evaporation, I didn’t know what happened inside. Only after the evaporation was over and the device was tested, could I get the data, and then analyze where it might appear. problem.

At that time, the efficiency of the devices was close to 0 for one month, which was really a dark time.

Sister, the predecessors planted trees, and the descendants enjoy the shade. Xu Qiu said.

To each other, you also helped me a lot, Chen Wanqing said, It is much better for two people to work in one field than to do it alone. If you have any problems, you can discuss with each other. You see, Wu Feifei and Duan Yun are just I often have a bitter face.

Keep your voice down, lest they hear you. Xu Qiu laughed.

…………

Evaporation is complete.

Xu Qiu first tested the two substrates under the best conditions, and the efficiencies were 7.57% and 7.68%, respectively.

Although it has improved compared to yesterday's 6.92%, it is still not interesting.

He tested the remaining six pieces. He didn't have much hope for them, but he got an unexpected surprise.

The highest efficiency of one slice reached 7.86%, which is just a step away from 8%.

Look at the conditions, it is 23 mg per milliliter, donor-receptor ratio 1:1.3, 0.7% volume fraction DIO+chlorobenzene solvent, 2200r.p.m..

Moreover, the speed of this solution has not been adjusted yet, so it is still very possible for the efficiency to exceed 8%.

As for Teacher Wei's 9%, Xu Qiu took it as a joke.

At present, he can’t see a way to achieve 9% efficiency of this system. Perhaps replacing the two transmission layer materials of PEDOT:PSS and calcium can further optimize the performance of the device, but it’s a good idea to change rashly without relevant experience. The experimental conditions, the high probability is that the more adjusted the lower the efficiency.

Basically, the only thing that can be changed is the effective layer, and he has tried more than 70 conditions on the effective layer, and there is not much room for further improvement.

Therefore, he only asks for an 8% now.