I Have a Research Support System

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After exchanging good morning with the school girl, Xu Qiu strolled to Caiyi.

The main reason for not going to Zhangjiang today is, on the one hand, to hold a class meeting, on the other hand, the school girls have collected a lot of products to separate and purify, and they must use a liquid chromatograph for a whole day. Beat soy sauce.

Arrived at 216 ten minutes earlier, only Chen Wanqing, Wu Feifei and Sun Wo were in the office.

Saying hello to the friends, Xu Qiu sat next to the senior sister and asked casually: "How about the C1 components?"

"Hey, don't mention it. I made a batch, and the highest efficiency was only 0.89%." Chen Wanqing shook her head, not too frustrated, her face calm, "I plan to make another batch today. If it doesn't work, I will try to optimize it again. Molecular Structure."

"How much, 0.89%?" Xu Qiu asked in surprise. He remembered that the result after the first traversal with Simulation Lab II was only 0.67%. ‘How did the senior sister be higher than the system? Did I remember it wrong? ’

"It's less than 1%, it's really lower, but it's not so surprised, right?" Chen Wanqing tilted her head and looked at Xu Qiu carefully, as if she was saying "Little brother, do you seem to have an opinion on me? ".

"No, I didn't mean that." Xu Qiu explained, then took out the water glass, "I'll get a glass of water."

"Your drinking glass is still full." Chen Wanqing spit out.

"Now only half is left." Xu Qiu unscrewed the lid of the cup, took a big sip, and the tooth flakes chilled,'Oh, it's so ice. ’

"Go, go." Chen Wanqing waved her hand. ‘School brother, it’s weird early in the morning, forget him, continue chasing drama. ’

Xu Qiu took the opportunity of fetching water to enter the simulation laboratory II and opened the historical data.

Sister C1's system, the highest efficiency is 0.67%, yes, what went wrong?

Xu Qiu murmured to himself, it can't be the elder sister's data fraud.

He quickly ruled out this possibility. The efficiency is less than 1%, and it is not 10%. There is no meaning of fraud.

‘Data can speak, let’s look at my historical data first. ’

After a few minutes, Xu Qiu finally figured out the reason.

When the simulation laboratory II was started for the traversal, he provided the simulation laboratory personnel with the initial conditions of the PDI system.

Afterwards, the C1 material synthesized by the school sister is A-D-A structure. The optimal applicable conditions of the two are not the same, but the initial conditions have not been changed.

Therefore, based on the initial conditions of PDI, it only takes 5 hours to conduct preliminary exploration, which is too short and there is no perfect optimization condition.

This leads to a unilateral increase in the efficiency data of the device to 0.67%, which means that there is still room for improvement.

However, the room for improvement is not very large, it is estimated that it will die to 1%.

So Xu Qiu didn't waste points on the senior sister C1 system. The foundation was too bad and not worth it.

This also reminded him that the simulation experimenters in Simulation Lab II are not very intelligent now.

It is impossible to believe that, after getting the results, you still have to screen it yourself.

Thinking of this, he looked through the results of several PDI traversals.

These data do not seem to be a big problem. The performance of the device generally shows an extreme point formed by first rising and then falling.

There may be room for further improvement, but there is no need to try for the time being because the price/performance ratio is not high.

Xu Qiu occupied the glove box and began to prepare the solution.

The effective layer structure of the device I plan to make today is P3TEA: PDI3-B-56, which is also the best system traversed in the simulation laboratory II.

The donor material, P3TEA, only has a sample of 15 mg in the laboratory. He remembers that when the PDI dimer was used, this donor had the best performance, and he could buy some more later.

Xu Qiu took only 15 mg of the acceptor materials PDI3-B-5 and PDI3-B-6, and the rest was left in Zhang Jiang for the next molecular structure optimization.

The two solutions were made up of 1 ml each, which consumed 8 mg of donor and 12 mg of acceptor.

The specific conditions are chloroform solvent, normal spraying, DA ratio 1:1.5, concentration 10 mg/ml, 1% volume fraction, thermal annealing at 120 degrees Celsius for 15 minutes.

The conditions are very different from the previous PCE11:PCBM system, and the C1 system is not small.

This is the case in the field of organic photovoltaics. When either the donor or acceptor of the effective layer material changes, the optimal conditions may change greatly.

Therefore, under normal circumstances, device optimization is a very long process, and it can be completed in a week with a little luck, and two weeks or even a month is possible with a little luck.

The key is to spend a lot of time and cost, but the final result is not necessarily good.

For example, a new polymer donor material was designed for use in a fullerene derivative system. It took one month to synthesize and another month to optimize the device, but the efficiency was only 4%. If it is not high, the probability of SCI second area is high. Can not send.

If you don't want to waste this work, you can only grit your teeth, spend another month to supplement other characterizations, write articles, and post SCI areas three and four.

This is not bad. If you encounter certain systems, you must add a specified volume fraction of solvent additives to achieve high efficiency. For example, if you don’t add it, the efficiency is 4%, plus 0.5% by volume, and the efficiency is 3%, plus 1.5. % Volume fraction, the efficiency can reach 8%.

When the researchers optimized the device, after adding 0.5%, they found that the efficiency was reduced, and there was no further increase in the volume fraction, resulting in the final efficiency staying at 4%.

In the end, I had the opportunity to post an article in the first district, but it was posted in the third district, which is very regrettable.

...

After preparing the solution, Xu Qiu returned to the office and walked directly to Chen Wanqing, "Sister, are you planning to make devices today?"

"Yeah," Chen Wanqing glanced at him suspiciously, "Do you want me to do it for you?"

"Senior Sister, who knows me," Xu Qiu nodded, "I have six devices, all of which are inverted structure. How about it, don't conflict with yours."

"Yes, I also do inverted structure, but..." Chen Wanqing changed her conversation.

"But what?" Xu Qiu had a bad feeling.

"Are you and Han Jiaying..." Chen Wanqing showed an inexplicable smile.

‘It was mostly Tian Qing who said something, but she has promised the school girl to keep it secret. Thinking of this, Xu Qiuyi said righteously, "Even if you are a senior sister, you can't taint your innocence out of thin air!"

"Really?" The senior sister obviously didn't believe it, her scrutinizing eyes flicked back and forth on Xu Qiu's face.

Xu Qiu didn't change her face and changed the subject, "By the way, Senior Sister, I have a plan."

"What plan?" Chen Wanqing was really attracted.

"After that, we will work in groups of three people. I am mainly responsible for making devices in Handan, and you and the younger sister are mainly doing synthesis." Xu Qiu said, after thinking about it, he included the younger sister in the plan.

He has a system. With this combination, device optimization consumes very little time, and can provide them with immediate feedback on the situation for them to further optimize the results.

On the other hand, he was also a little worried that the school girl doing experiments in Zhangjiang alone might be dangerous, but with two people, it would be much safer.

Chen Wanqing thought for a while and nodded, "This is a good idea, does Han Jiaying agree?"

"I already told her, she agreed."

"Then I have no opinion."

After getting the senior sister, Xu Qiu went to 218 again.

"Did not go to Zhang Jiang today?"

"Well, the first 3D-PDI molecules have been synthesized."

"Yes, hurry up and try the device."

"I want to buy a little P3TEA donor. The photoelectric company in Shenzhen City sent me some samples before and tried it. The effect is not bad. Moreover, this material in the literature is more suitable for the PDI series."

"Okay, you can watch and buy, is there anything else?"

"Gone."

"The new document is here for you. Go ahead and let me know if the device has the result."

"it is good."

Xu Qiu took a box of honey grapefruit tea and left, he said inwardly, "You don't need to ask the price for the ingredients."

Returning to 216, he contacted the optoelectronic company to buy 200 mg of P3TEA, which cost 2,400 yuan, which should be enough for a while.

The price of polymer donors, with the exception of P3HT, which has an extremely simple molecular structure, is about 10,000 gram for most of them, and even two to three thousand one gram for imported ones.

After that, Xu Qiu asked her senior sister to rub six zinc oxide substrates and selected two sets of conditions with an efficiency distribution of 3.5%-4% to spin-coat the effective layer.

It would be too exaggerated if the optimal conditions were used directly, and it would be too exaggerated, and might make Teacher Wei expect too much.

Not a good choice.

Regardless of the specific performance, he knew it in his own mind.

...

In the evening, the class will meet.

At this node in the next semester of the senior year, it was not a good way to convene students, and people did not come together.

Counselor Yu Qiang mainly talked about graduation-related matters. This time it was mainly for students who are looking for a job, involving matters such as signing a tripartite employment agreement.

For graduate students and graduate students abroad, the process is almost finished now, and there is basically nothing wrong with it. You can complete the post-graduate program with peace of mind and wait for the graduation certificate and degree certificate.

Listening to the counselor's voice, Xu Qiu's thoughts gradually drifted away.

In the university, he experienced two counselors. When he was in the freshman technical science pilot class, he was a first-year student in the computer department as a counselor. After entering the materials department from sophomore to senior year, he was replaced by an associate professor in the materials department. Yu Qiang.

Generally speaking, he does not have a lot of interactions with counselors. When he was a freshman, he did not take the initiative to talk to the counselors. Most of the time, he explored the new life of college by himself.

Later, I heard a few friends who were counselors talk about the bad things they encountered:

If the course is not selected, ask a counselor to help select the course;

Lost in love, find a counselor for psychological counseling;

Money is tight, ask a counselor to borrow money;

XXX in the class, find a counselor to make a small report;

There are also attempts to strike up a conversation and develop a wave of beyond friendship.

In short, there are all kinds of birds as the forest grows.

In addition to the tutor system, the Department of Materials has another tutor system. Unlike graduate tutors, this one is dedicated to undergraduates and is nominally to provide undergraduates with scientific research guidance.

There are three majors, each major has a tutor, usually a green pepper scholar with little qualifications ~www.ltnovel.com~ Because there is no interest, the tutors are not very interested.

Caihua's tutor Xu Qiu only officially contacted once. That was when they visited the dormitory during their sophomore year, and they never contacted again.

The counselor’s words are truly profitable and can take the path of talent engineering.

Dedicated for three or four years, you can get another chance to stay in school, and even have a little chance to stay in school.

However, according to the current market situation of the University of Magic, even staying in the university is an administrative post, such as academic affairs, and there are not many places, but it is a way.

When the time is pushed forward by ten years, it is possible to stay as a lecturer directly after graduating with a PhD.

Now it is getting harder and harder.

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