I Have a Research Support System

After installing the sample stage, it is necessary to put the sample stage back into the evaporation chamber.

It is easy to disassemble, but difficult to put back, because there are many restrictions to operate in the glove box.

On the one hand, it is inconvenient to operate while wearing thick rubber gloves. On the other hand, it is also the most important reason. The length of rubber gloves is limited, and the position of the sample stage is at the limit position of the gloves. Only by being very straight can you get it.

Coupled with the glove box glass barrier, two hands cannot be extended to the position of the sample stage at the same time, that is to say, it must be operated with one hand.

Xu Qiu groped in the glove box for a long time and came up with a solution.

First use the middle finger and ring finger to support the sample stage weighing more than one catty, and then use the thumb and index finger to screw the spacers and screws on.

Then, Xu Qiu's whole body took on a posture similar to lifting a huge boulder above his head.

In the end, it took him more than 20 minutes just to screw these three screws, and he was sweating half of his body. It felt like he had a fight with a school girl.

Thinking about the possibility of changing back to the original mask version, Xu Qiu was fighting with each other. It seems that he still has to optimize the disassembly plan in the future...

After completing this operation, Xu Qiu mastered the skill of "replacing the sample stage", copied the evaporation glove box with the mask plate replaced into the simulation laboratory at the same time, started to explore the performance, and selected PCE10:PCBM, PCE11: Several standard samples such as PCBM, H22:ITIC, and PBDB-T:ITIC were tested.

Afterwards, Xu Qiu looked at Han Jiaying and Mo Wenlin who were next to the spin-coating glove box, and found that the two of them were talking and laughing.

Didn't he still look tense before?

Sure enough, women are a bunch of strange creatures.

However, it is much more reliable for Han Jiaying to teach Mo Wenlin now than for the senior sister to be in charge.

And girlfriends or something, hehehe...

Xu Qiu walked over to the two of them and told them to pay attention to the orientation of the substrate during evaporation, and then returned to the office to continue writing articles.

Now that a week has passed, the overall framework of Xu Qiu's two articles has been fully constructed, and the completion of the papers has reached more than 60%.

This progress is still very fast. After all, there are too many articles written. Xu Qiu also summed up a set of writing routines. For similar systems, just change the template and apply it.

It's not that Xu Qiu doesn't want to write "new" things, but objectively, there is really nothing new to come out.

For example, the field of materials belongs to applied science, which relies on a little progress, moving forward step by step, and finally achieves qualitative change from quantitative change. This is what he is doing now.

If you want to achieve it overnight, let’s dream, there is everything in the dream...

Moreover, new does not mean good. Most of the "new" things in the academic circle are new because they are poor...

For example, a new researcher who has just entered the industry may have doubts, "Why don't we make the XXX structure? No one has made this new structure. Why do we have to follow in the footsteps of the big guys and make a similar structure?"

The answer is actually very simple. The high probability is not that no one has done it, but that someone has done it, but the performance is not good.

Doing scientific research in reality is not a novel. If you follow a dead end, you will end up dead. There is no such thing as chance or grandpa.

In the evening, Mo Wenlin and Han Jiaying got the test results of the new version of ITO devices.

Compared with the highest value of the previous standard sample system, if the 2 square centimeter device is directly tested without a baffle, the efficiency attenuation range is between 30% and 60%;

Choose the same 0.09 square centimeter shading as the standard sample, and the efficiency attenuation range is about 10%-20%;

However, if small-sized baffles are used, 0.04 and 0.01 square centimeters, the efficiency attenuation ranges are reduced to about 5%-15% and 0%-10%, respectively.

Han Jiaying found Xu Qiu, reported the results, and analyzed: "Compared with the original standard sample, the new ITO pattern has a big performance gap. For example, the original H22:ITIC system has an efficiency of more than 10%, but now it uses 0.09 square centimeters. In the baffle test, the efficiency is only 8.35%.”

"It looks like this on the surface, but..." Xu Qiu changed the subject: "Now there are only data of 20 substrates, the number of samples is too small, and the data of standard samples are the highest values ​​repeated many times, so we cannot jump to conclusions."

"That's right," Han Jiaying nodded and said, "Then Mo Wenlin and I will try to make a few batches of devices next week."

"Okay," Mo Wenlin also agreed, "This time it may also have something to do with my poor spin coating."

"Take your time, just practice more." Han Jiaying encouraged.

Xu Qiu looked at the two girls suspiciously.

Then, Han Jiaying took the initiative to smile and said, "Brother, let me introduce you again. This is my best friend Mo Wenlin. You can't bully her in the future."

Xu Qiu:? ? ?

Well, no matter what, it is a good thing that two people can get along in harmony.

In the evening, Xu Qiu returned to the dormitory.

In the past few days, he was the only one in the dormitory. Tao Yan was still abroad, and it was said that he would only come back before the graduation ceremony. Ren Bin also went back to his hometown in Jiangcheng, but he has not yet returned.

Now that graduation is approaching, the students have begun to move and throw things away one after another. You can see all kinds of sundries piled up in the trash can.

There is also a special donation box downstairs, where old clothes can be put in, and will be donated to students in backward areas as a loving donation.

Occasionally, old men who bought waste books would appear. The textbooks bought for tens of yuan before were only about one yuan.

However, textbooks for basic subjects such as "Advanced Mathematics", "Mathematical Analysis", and "C Programming" or political courses such as "Outline of Modern History" do not depreciate much, and can be sold for 5 yuan or 10 yuan. block.

In addition, after the senior graduates get their graduation certificates in July, the school will start to evict them, and they cannot continue to live in the original undergraduate dormitory.

And the new postgraduate dormitory will not be allocated until after the semester starts, so before the postgraduate formally enrolls, Xu Qiu is in a homeless situation.

Fortunately, graduate students like him can temporarily store their luggage in the school.

Of course, these are all small problems, and Teacher Wei must help solve them.

Isn't there a saying called, if you have a problem, find your interest.

Xu Qiu entered the simulation laboratory.

At this time, the simulation laboratory has completed thousands of performance tests based on new ITO pattern devices and summarized the results.

First of all, compared with the standard sample, the average efficiency attenuation of the device with the new version of the ITO pattern is about 6% when the same size, that is, a 0.09 square centimeter baffle is used to test the device.

Among them, the new version of the device based on the H22:ITIC system has the highest efficiency of 9.53%.

This shows that the actual impact of lateral current on device performance is not as exaggerated as Gong Yuanjiang said before.

What Mo Wenlin said is correct, it may be that she did not make this batch of devices well. Of course, this is the third time she has prepared devices, and it is understandable that she has done a little worse.

This efficiency decay is considered bad news, and the rest is all good news.

On the one hand, for a device prepared with a new ITO pattern, theoretically one device can obtain countless result points, and each time the test is performed, the position of the shielding plate is changed to form a new battery device.

However, the amount of data obtained from a single preparation of devices increases, which can reduce the number of device preparations. Previously, only 10 or 15 batches of devices were required to obtain the results. Now, only 5 or 8 batches may be needed, which can shorten the time spent in experiments.

On the other hand, considering that the film thickness and blending morphology at different positions on the same device are slightly different, testing at different positions of the device is actually a process of exploring the preparation conditions, similar to the previous regulation of spin coating speed. operation.

In addition, when sprinting for efficiency, it is also possible to use the small size of 0.01 square centimeters as a result.

Just like in this exploration process, although the large-scale efficiency of 0.09 square centimeters decreased by about 6% on average, the efficiency of 0.01 square centimeters increased by about 3% on average.

As a result, Xu Qiu directly broke his previous record. The highest efficiency of the H43:IT-4F system broke through from 11.75% to 12.08%.

This is the first time his device efficiency has exceeded 12%, which is one step closer to the world record.

Moreover, this kind of test result is also recognized by the simulation experiment system, and the advanced task of the system is also updated as follows:

Advanced task (choose one of three): break the world record for photoelectric conversion efficiency in the field of organic solar cells, and the increase needs to exceed 0.5%, (the current world record is 12.21%, the target value is 12.71%, and the current highest value of the host is 12.08%); Published 10 articles in SCI Region 1 as the first author/corresponding author (the host has published 3 articles); as the first author/corresponding author in any journal of "Nature", "Science" and "Cell" Publish an article.

PS: Guess which one of the three tasks will be completed first? A. Breaking the record B. Ten articles in one district C. Publishing the top journal of CNS.