I Have a Research Support System

Xu Qiu?

Sister?

What are you doing here?

Do an experiment, how about you, senior?

Help you revise the article, how about it, it's moving.

I'm almost moved to tears, no, I'm also doing an experiment for you.

It seems to be oh, that's even, by the way, what about the results of the experiment?

The result, guess what?

Hmm... yesterday's efficiency was less than 5%, Chen Wanqing thought for a moment, then said:

Could it be 6%, 7% today?

Xu Qiu shook his head expressionlessly.

Is it high or low? Chen Wanqing asked.

It's low. Xu Qiu said.

Then, 8%?

After Chen Wanqing finished speaking, she carefully observed Xu Qiu's expression.

She murmured in her heart, as if she was still screaming, and asked tentatively:

9%?

Xu Qiu still shook his head.

No way, Chen Wanqing hesitated to say, Could it be more than 10%?

Bingo, Xu Qiu said with a smug smile:

The highest efficiency of this batch of devices is 10.44%.

How did you do it? Just tried two batches of devices, and the efficiency can be so high. Chen Wanqing was surprised.

Maybe it's luck, Xu Qiu shrugged and said:

After I went back yesterday, I analyzed the reasons for the failure of the first batch of devices, and I thought it might be that the transmission layer was too thick.

Therefore, today I adjusted the concentration of the perovskite solution, and I did not expect to succeed at the first time. Among the four groups of materials, 4# has the best performance, and 2# is not bad, and the efficiency can reach 9.6%.

In fact, Xu Qiu himself felt that the success this time was due to a large proportion of luck.

If none of the four materials he selected is suitable for the transmission layer, then no matter how he adjusts the experimental conditions, it will be useless.

On the other hand, hard work is also essential. Three batches of devices were made in two days, compared to nearly 20 hours of high-intensity work within 48 hours.

It is very uncomfortable to do experiments in the glove box in summer. Even if there is an air conditioner to cool down, after the experiment is over, the whole person is like a sauna.

Is there any chance to make the efficiency higher, for example, to more than 11%? Chen Wanqing asked.

I personally feel that the possibility is not high, Xu Qiu said:

After all, it is only a transport layer material, and the photoelectric conversion efficiency of the device mainly depends on the effective layer.

Anyway, there will be repeated experiments in the future, and I will try it again at that time, and I can also try the inverted structure.

If it can reach 11%, the grade of the published article may be higher. In the current situation, it is estimated to be another article about the end of the crane in the second district.

However, this article can be published as Communication, and there are relatively few experiments to be supplemented. Chen Wanqing said.

After finishing speaking, she said with emotion:

I didn't expect that I haven't finished my last article, and I haven't finished editing your article, and I will write a new article soon.

This is the trouble of happiness. Xu Qiu said.

The two were silent for a while, and Chen Wanqing said casually:

By the way, junior, do you have any thoughts on the first work of this article?

What, a job?

Xu Qiu hadn't thought about this question before, and he had always defaulted in his heart to do the experiment for the senior sister. Now think about it carefully:

At the beginning, the senior sister proposed an idea, but he completed the core experimental design and experimental operation.

If the follow-up supplementary experiment and article writing are also done by him, it is well-deserved to give him a work.

However, there is no need to compete with the senior sister for an SCI second-division article. She will have to publish four second-division and first-class works in three years before she can graduate.

As far as he is concerned, regardless of the situation of graduating early, there are still six years to go before graduation, and there will definitely be no shortage of articles.

Thinking of this, Xu Qiu said:

There's no need to give me a first one. This idea was originally proposed by my senior sister. Just treat it as an experiment for you. Just give me a second one like the previous one.

With your contribution, the second work is not suitable, or should we share one? Chen Wanqing said.

What is it? Teacher Wei's voice came from the door.

Both of them were shocked, they didn't hear Teacher Wei's footsteps at all.

Wei, hello Teacher Wei, it's like this, Chen Wanqing said nervously:

Xu Qiu tried out the idea of ​​the perovskite transport layer I mentioned before. The positive structure he used replaced PEDOT. Now the highest efficiency exceeds 10%, which is 0.3% higher than the standard sample.

Hey, Wei Xingsi looked at Xu Qiu with satisfaction, and said happily:

I just picked up a treasure. Tell me, how to do it.

Xu Qiu began to introduce in detail:

I first consulted Senior Sister Wu Feifei, took a review of perovskites from her, and screened out some perovskite materials with wide band gaps.

Then, using the existing materials in the laboratory, four solutions of MAPbBr3, MAPbCl3, FAPbBr3 and FAPbCl3 were prepared, all of which were wide bandgap.

Then, the perovskite solution was spin-coated by one-step method and anti-solvent method, and a smooth film with a thickness of about tens of nanometers was obtained, which was used to replace PEDOT as a hole transport layer.

The other preparation methods are the same as the standard sample, and finally the device based on the FAPbCl3 transport layer has a maximum efficiency of 10.44%.

This idea is really good, Wei Xingsi nodded and said:

One of the great advantages of perovskite materials is that they have high charge mobility. In addition, you choose a wide-bandgap material, and the coating is very thin, which hardly absorbs sunlight and has a good shape.

In theory, it is indeed a better transmission layer material.

That is to say, there are still relatively few people doing perovskite. I guess even if we don't do this work, after a while, someone else will do it.

So, hurry up and get this article out. Although it may be just a small article, you can't let your efforts go to waste.

Okay. Xu Qiu and Chen Wanqing nodded at the same time.

Wei Xingsi looked back and forth between the two for a while, then said:

What to do about the article, you can decide for yourself.

When this article is finished, Chen Wanqing, you can take him to Zhangjiang to do synthesis. In this field, if you want to publish a good article, you still have to synthesize new materials yourself.

By the way, I just bought a box of salt soda for you, and the courier called me and said it was delivered to my office door, Xu Qiu, come over and move it.

...

on the way.

It's a lot of effort to come here to do experiments on Saturday, Wei Xingsi sighed, It looks like when I was young.

Xu Qiu really wanted to say that he forgot that today is Saturday, but he changed his words when he got to his lips:

The main reason is that I had the inspiration for the experiment in my heart, so I wanted to come over to verify it quickly. I didn't expect to succeed after just one attempt.

Okay, work hard here with me, if you have any difficulties in life or experiments, you can tell me, don't have any scruples. Wei Xingsi said.

Okay. Xu Qiu saw the salt soda placed at the door of 218, and said, Is this it?

Well, let's move back. Wei Xingsi said.

Xu Qiu moved the salt soda to 216, opened the package with scissors, took out two bottles, and handed one to the senior sister.

Then he unscrewed the cap and took a sip.

I*, why is it hot, and it smells like plastic.

Forget it, just drink it.