Chapter 428: Wei Xingsi's mental journey back home

Teacher Wei realized his gaffe, and proactively explained: "When I was working at NREL, a beautiful country, I worked with Ma Weiwei for a while. She was considered my junior and sister, but she transferred to another research group halfway through. I thought She wants to stay in the beautiful country forever, but she unexpectedly ran back quietly without saying hello to me." At the end, he shook his head gently.
Seeing Wei Xingsi's performance, Xu Qiu thought to himself: ‘Ms. Wei and Ma Weiwei seem to have a story. ’
However, Xu Qiu was not interested in digging deeper. Anyway, there are only a few possibilities for a man and a woman.
As a result, he casually changed the subject: "It seems that many foreign researchers are now going to China."
"Yes, this has indeed become a trend. Before, domestic talents kept running outside, but now they are slowly returning." Wei Xingsi added:
"Mainly because our country attaches great importance to scientific research in recent years, and has introduced many talent introduction policies including the'Thousand Talents Plan'. If the talents can be brought back to the country, the treatment will not be much worse than staying abroad. ."
Xu Qiu answered, "Then Teacher Wei..."
Wei Xingsi interrupted: "The reason for my return to China is that on the one hand, the original research group on the NREL side of the beautiful country has disbanded and needs to stand on its own. This is an opportunity; on the other hand, it is also because my father is now older. I have to come back and take care of him. In addition, from the perspective of the general environment, the domestic scientific research environment is slowly improving. Although the domestic bureaucratic atmosphere is a little heavier, this is the same everywhere in the world. There will be disputes, and there will be people in the beautiful country with sophistication to consider..."
Xu Qiu nodded. This was the first time he heard Teacher Wei talk about his journey back to China.
It turns out that Wei Xingsi used to run to the hospital on Fridays, not all because of his own cervical spine problems. Maybe he was going to take care of the elderly at home, but he was also a filial son.
After that, the two chatted like friends for about half an hour, and Xu Qiu learned something about the beautiful country's scientific research circle.
For example, the reason why many people stay abroad and cannot come back is because they have integrated into the foreign environment, adapted to the rhythm of the foreign country, have their own social circle, and the main relatives in the family have also immigrated. If you are a familiar person, returning home is equivalent to going abroad.
For another example, Mr. Wei said that
the treatment will not be much worse after returning to China than staying abroad
refers to
the treatment reduction rate is within 50% (calculated in the same unit currency)
.
In a beautiful country, post-doctorate is a cheap labor. The annual income of postdoctoral fellows in colleges and universities is generally around 3W5 US dollars, which is about 20W soft sister coins. If you save money and spend a year, you can save about 10W soft sister coins.
The salary of faculty positions is better than that of post-doctoral fellows. Assistant professors are the kind of non-promotional positions that can be promoted for six years under the assessment system. They can almost reach 6W-7W5 dollars. This is a nine-month salary. More often, in the other three months, you can pay yourself extra wages, and you can get more than 40W soft sister coins every year.
Wei Xingsi had spent nearly ten years in the beautiful country, mainly working in the NREL Research Institute, and his annual income before taxes was about US$10W.
On Monday, the group meeting.
Feifei Wu continued to write the CM article "Two-dimensional Perovskite Device Based on ITIC Transmission Layer".
However, affected by the move and going abroad this week, her progress has been slowed down a lot, and she is currently about 30% completed.
Feifei Wu's other work is to directly spin-coat the organic photovoltaic active layer on the two-dimensional perovskite to prepare the device. She found that when the thickness of the organic layer is relatively thin, the performance of the device will be slightly improved. In order to explain this phenomenon, she sent samples Tested on Feng Shengdong of Sweden, and now there are results.
Feng Shengdong and the others found that a fluorescence resonance energy transfer (FRET) effect is formed between the thin organic photovoltaic layer and the two-dimensional perovskite layer, which may be the reason for the improved device performance.
At the same time, Feng Shengdong suggested to regard this thin organic photovoltaic layer as an effective layer, so that it can be distinguished from the previous work that directly used ITIC as the transport layer.
In fact, whether it is the transmission layer or the effective layer, it is just a statement. In this work, the role of the organic photovoltaic layer may be both.
But the presentation must be distinguished from similar work, otherwise it may be attacked by reviewers due to lack of novelty.
Engaging in scientific research is sometimes like doing business. Good job is on one side, and on the other hand, you have to promote it to make others feel that your work is great, or else you will be afraid of the deep alley.
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Duan Yunhui still paddling, he was a little depressed recently because of his job search.
If he finds an offer, Mr. Wei will probably not stop him for an internship, just like Chen Wanqing does two or three days a week to the Blue River, Wei Xingsi didn't say anything.
But Duan Yun doesn't have a single offer now, which is very embarrassing. He can only stay in the research group and mix first.
Sun Wo continues to write his ACSAMI articles, and the current progress is about 55%.
His writing speed has gradually improved. After all, his English foundation is not too bad, but he has not received special training in writing essays before, and now he is gradually becoming proficient.
Tian Qing recently reached a cooperation with Ronald of Finland, intending to further explore the non-fullerene system in the group using the CELIV method.
The two parties each chose a direction for research.
Ronald took a standard system, which is Chen Wanqing's PTB7-TH: System.
Their research group tried to use various CELIV methods developed by themselves to characterize the charge mobility data, interface recombination, and trap state distribution under the standard system, and then obtain the mechanical information of the overall charge transport movement of the photovoltaic device.
Tian Qing chose three non-fullerene acceptor systems. The donor material is the donor material H32 previously developed by Han Jiaying. The acceptor material is also a ready-made material in the group, ITIC, IT-2F, and IT-4F.
With the increase of the number of introduced fluorine atoms, the HOMO energy level of these three acceptor materials becomes deeper and deeper.
When the receptors are combined, the HOMO energy level difference between them changes linearly, from 0.15 electron volts to 0.10 electron volts, and then to 0,05 electron volts.
The device efficiencies of these three systems are all distributed in the range of 8%-10%. Although not high, it is sufficient, as long as it can be proved that the device can work normally.
In addition to the use of CELIV electrical methods in cooperation with Ronald, Tian Qing also intends to cooperate with Feng Shengdong of Sweden to use optical methods such as TAS to conduct mechanism research from another direction.
Chen Wanqing's work at Lanhe last week made some progress again. She tried several blended solvents as a squeegee solvent, and finally found that on the basis of the original chlorobenzene, about 15% of the volume fraction of dichlorobenzene was added. , Which helps to obtain a film with better flatness, and finally, the device efficiency is increased from 7.33% to 7.62%.
At the same time, the stability of Blue River's machine has also been greatly improved. Three, four, four or five of the ten devices prepared before are broken, either short-circuited or broken. Now the yield rate can reach 90 %.
Xu Qiu was entangled in various affairs last week. The progress of writing articles was slow. His work on "non-fullerene standard sample scraping effective layer", the target journal AM, is currently progressing at about 50%. He plans to hurry up this week. Give the article to the liver, and then cast it quickly.
There are still a lot of things waiting for him after that, and he can't stay too much time on "small" articles like AM.
Han Jiaying was also entangled in various affairs last week and hardly conducted experiments.
However, her now deep biography of Xu Qiuzhen, after conducting experiments on H5 and J4 donor materials last week, did not report all the content at the group meeting, but kept a hand.
Therefore, this group meeting is just right to use, including CV test energy level structure, and a batch of device performance data.
Xu Qiu calculated below that when the experiments of the school girl J4 and H5 systems are almost done, she can try to synthesize the PTQ series donors that she thought of before, that is, the wide band gap donor materials with relatively simple structures. Preliminary work should be done for the application of fund projects.
Wu Shengnan has developed two materials, IHIC and 4TIC, and the experimental data has almost been supplemented. Both of them are translucent systems. She has begun to organize articles, but is not planning to submit large articles. The target journals are JMCA and CM.
After all, Wu Shengnan doesn’t have much time. She will be out of the station in only two years. It would be best if she can publish top magazines like AM. If she can’t publish more articles like JMCA and CM, she is also very profitable. of.
Xu Qiu was under the stage and was also considering whether to wait for the postdoctoral sister to be busy, and asked her to help make a Y series acceptor, that is, on the basis of ITIC, by introducing nitrogen atoms to increase the molecular weight Yoke, the result of modifying the central D unit.
However, the Y series acceptors are somewhat special, and are different from the PTQ series donors. According to Xu Qiu's current research in the simulation laboratory, the efficiency of an organic photovoltaic device corresponding to a Y series acceptor has reached 13%.
Xu Qiu felt that the UU reading www.uukanshu.comY series of receptors has a high probability of achieving breakthroughs, such as 14% and 15% of the dual system.
If this is the case, it is better to come by yourself. For ordinary work, small articles can be given to others, but big articles must be held in your own hands.
Karen Mok finished writing her third ternary system article last week and voted it out. The target journal is ACSEL.
She reported on the next prospects, unswervingly continued to do ternary, and listed two new ternary systems.
Apparently, I was planning to "eat fresh with one trick."
Speaking of it, Chen Wanqing was the originator of the ternary in the group. The first job was the ternary blend system, and then there was another ternary conjugated copolymer.
It's just that she is not very lucky. If she can meet Xu Qiu later, borrowing the ITIC series to do the ternary, it is estimated that she can publish AM as easily as Mo Wenlin.
However, having said that, if she meets Xu Qiu later, the latter system will probably not belong to her.