I Have a Research Support System

Senior sister is even better, the highest can reach 4.5%. Xu Qiu said.

My 4.5% is the highest value, Chen Wanqing said: I have made dozens of batches of devices, and only reached that high twice, and most of the time it is still hovering between 4% and 4.4%.

If senior sister hadn't figured out all the conditions, installed and connected all the devices and equipment, I wouldn't have gone so smoothly, Xu Qiu said.

Okay, don't be modest, Chen Wanqing said, Continue to test, it will take a long time.

In fact, before the results of the experiment came out, she was still a little nervous. After all, this was the data she needed.

When conducting experiments, there will always be various accidents, some of which can be avoided by experience, and some of which cannot.

For example: the cleaned substrate disappeared; when the effective layer was about to be spin-coated, it was found that the oxygen content in the glove box was \u003e500ppm; the fuse was blown halfway through evaporation, etc.

Especially for multi-stage experiments such as device preparation, any accident in any one of the steps may lead to the failure of the entire experiment.

The most important thing is that the operator of the experiment is not herself, and she is not sure whether Xu Qiu can handle all kinds of unexpected situations encountered during the experiment.

Now it seems that the junior is still reliable, and I can add more burdens to him in the future. Chen Wanqing thought happily.

Relatively speaking, Xu Qiu was quite calm.

He feels that he operates completely according to the norms. If this fails, then he...

There is no way.

Man proposes, God disposes.

He can only do it again, trying to find the reason.

If the operational reasons are ruled out, it may be caused by medicines, instruments and accidents.

…………

Xu Qiu continued to scan and test the device repeatedly under light conditions, saving the data for each test.

Photoelectric conversion efficiency is constantly fluctuating:

4.30%, 4.36%, 4.33%, 4.28%, 4.30%, 4.26%, 4.24%, 4.25%, 4.22%…

Looking at this changing trend, Xu Qiu asked:

Why is the conversion efficiency fluctuating and decreasing?

Because the PC[60]BM in the effective layer is unstable, Chen Wanqing explained: It will produce dimers under long-term light, which will destroy the original blend film morphology and cause the attenuation of photoelectric conversion efficiency.

Then this kind of material is unstable to light, why is it still used to make solar cells? Isn't this a pit? Xu Qiu was puzzled.

Well... from the perspective of industrial application, it is indeed a huge problem, Chen Wanqing said:

But if this material is perfect, then there is no need to study it in the laboratory, and it can be used directly for industrial applications.

It is precisely because of its imperfection that we have to spend energy to study it, but the premise is that this field has application prospects in the future.

Every year, the country spends hundreds of millions of yuan for scientific research and distributes it to several fields. It is casting a wide net, and if it can catch one or two big fish in the net, it will make money.

Of course, there is also a competition mechanism in it. The better the development prospects, the more resources you can get;

However, in the fields that have not achieved much, there has been no capital injection in the later stage, and scientific research resources cannot be obtained, and the entire industry has gradually cooled down.

Just like the dye-sensitized battery that was still hot a few years ago, few people are doing it now, and it may only appear in textbooks in a few years.

Similarly, if our current field has not achieved any breakthrough results in a few years or more than ten years, it will slowly die out.

As you said, the problem of poor stability can only be ranked second at present, and the primary problem is that the photoelectric conversion efficiency is too low. In addition, there are cost issues, large-area preparation issues, and the like.

Oh—— Xu Qiu dragged his voice deliberately: I understand, I understand.

Chen Wanqing was amused by him: Tell me, what do you know?

In the scientific research circle, one must either be a big boss and lead the trend, or be the younger brother of the big boss and follow the trend closely, or he will be eliminated. Xu Qiu said.

Hmm... I always feel like you're talking about something wrong. Chen Wanqing tilted her head and pondered for a while, then said, But for us students, it's really important to choose a research direction, and I've heard of many tragic cases before.

Students in the Department of Agriculture, the experimental corn planted in the field was stolen by passers-by, cooked and eaten, and the result was a year of work in vain;

Ph.D. in the Department of Physics, I chose a very unpopular spectrum research. As a result, the instrument broke down as soon as I arrived at the research group, and it has not been repaired after two years of repair;

Ph.D. from the School of Pharmacy, researching anti-cancer drugs with my tutor, and found out that my tutor's data was falsified when I was near graduation;

A student in the Department of Archeology studied a certain cultural relic for more than a year, and finally concluded that it was a modern imitation.

It's really miserable. Xu Qiu said with a smile.

Chen Wanqing spread her hands and said:

Okay, I'm going to slip away, my junior, come on.

Then she got up and went back to her desk.

The rest of the work is to repeat the test, which is not difficult to operate, but it takes a lot of time.

There are a total of 21 substrates, each with 6 batteries, and it takes about 2 minutes to test one battery.

Fortunately, there is a stool next to the glove box, so you can sit down and do experiments.

...

Time passed by every minute and every second.

At around nine o'clock, Tian Qing left.

At ten o'clock, Teacher Wei went to the laboratory to take a look, greeted everyone, told him to close the doors and windows when he left, and left.

Afterwards, Wu Feifei and Duan Yun also left.

Only Xu Qiu and his senior sister are left in the laboratory.

Let me finish the test with you.

good.

The two were busy until half past eleven.

The campus at this time is not as hot as it was during the day, and there are fewer people.

After the two walked side by side for a while, they separated. The dormitories for undergraduates and postgraduates are not in the same area.

The dormitory conditions for postgraduate students are much better. There are three or four-room suites with bathrooms. Doctors live in one room, and masters live in two rooms. There is hot water for bathing with campus cards inserted 24 hours a day.

…………

When Xu Qiu returned to the dormitory, he found Ren Bin lying on the bed playing with his mobile phone, and Tao Yan was missing.

Xu Qiu, it's so late today. When Ren Bin heard the sound of the door opening, he straightened up and sat up.

Yeah, the experiment is not finished, so I can't leave. Where is Tao Yan, going out to have fun again?

I don't know. After he went out with a schoolbag in the afternoon, he didn't come back.

Okay, leave him alone, I'm going to take a shower. Xu Qiu said while arranging the toiletries.

Now that the bathrooms are closed, you don't want to go to the corridor to take a bath in cold water, do you?

Go take a shower, it's summer now, so it's not a big problem.

Hallway bathroom.

call.

Xu Qiu stood under the shower head and turned on the water to the maximum.

The sprayed water column hit the body, and there was still a little pain.

He took a closer look at the top of his head, and it turned out that the nozzle was broken.