Chapter 260: Sister, don’t stand up FLAG, beware of the disaster

After the test, Xu Qiu returned to the office to report to Chen Wanqing:
"Sister, the highest efficiency of this batch of devices is 5.19%."
"Efficiency...how much?!" Chen Wanqing asked excitedly.
"5.19%." Xu Qiu paused every word.
"It's really broken 5%." Chen Wanqing still didn't believe it.
"Here, the data is here, you can read it yourself." Xu Qiu handed over the USB flash drive, "I didn't see you like this at 10% before, but now 5% are so excited."
"That's not the same. This is a new material that we developed together. My previous psychological expectation was to break 4%. Now it's one more percentage point, with 5% efficiency. The probability that this job can send AM is very high. "Hey." Chen Wanqing's eyes were blurred, and she smirked: "Hey, I am also a hot woman with half of my foot in AM."
"I still have two feet..." Xu Qiu said halfway, and realized that these words didn't seem to be very auspicious, so he closed his mouth in time and said earnestly: "Senior sister, don't stand upright, beware of misfortune."
"Brother, what are you talking about, what, what disaster comes out of your mouth, it's a good cut that doesn't exist," Chen Wanqing akimbo her hands, speaking very fast, and lashing out at Fang Qiu: "I'll take this AM, and will keep it. Don't stop it, I said."
Xu Qiu was speechless and gave the senior sister a caring look.
If Chen Wanqing didn't see it, she suddenly put her hands on her cheeks, leaned over to Xu Qiu, blinked and said, "Scholar, do you think 6% has a chance?"
"I don't know," Xu Qiu shook his head, "Perhaps replacing other wide bandgap donors has a chance to improve the performance, but we don't have it." The initial optimization result given by the system is 5.48%. Can it be more than 6%? Not sure, a high probability is possible.
"That's the truth. In the structure of FTAZ, BDT is actually directly connected to an alkyl side chain, not even a thiophene ring. I don't know how this structure was designed." Chen Wanqing thought for a while and said:
"However, the current world record of the A-D-A system is about 6%, and our 5% is enough. Anyway, the A unit we use is brand new."
In the next few days, based on the preliminary results of the simulation experiment system, Xu Qiu helped the senior sister to optimize the device. At the same time, he asked for some mechanism-related documents from both Tang Yunkun and Feng Shengdong to supplement his shortcomings in the charge transport mechanism. .
In addition, he took the time to read his article twice and polished it up a bit, only to add the results of TAS and GIWAXS.
Thursday.
Xu Qiu has made three batches of devices in total, and has gradually optimized the efficiency of the senior FTAZ:IDT-ICIN system from 5.19% to 5.86%, which is half a body short of the current world record of the ADA system (6.02%). (0.16%); The efficiency of the PCE10: IDT-ICIN system has also been optimized to over 4%, reaching 4.13%.
During this period, Xu Qiu did not use the power of the simulation laboratory, mainly to exercise his abilities, not to save points.
Teacher Feng Shengdong sent a message to Xu Qiu, saying that he had received the TAS samples, and now began to arrange the test, try to get the experimental results within three days and write the description part.
Han Jiaying’s third-generation B4T-568 series 3D-PDI molecules have been synthesized, and she also synthesized the third-generation B3T-6 series 3D-PDI molecules to compare with the previous first and second-generation B3T-6 series molecules .
Chen Wanqing sees that the device efficiency data is steadily increasing every day. Her work efficiency in experiments has directly increased by 20+%. The characterization data of the PCE10: IDT-ICIN and FTAZ: IDT-ICIN systems has been collected by 90%. The difference between TEM on Friday and GIWAXS on Saturday.
However, she has been busy doing experiments this week, and most of the data is just in the raw data state and has not had time to process it.
Xu Qiu copied several materials synthesized by Han Jiaying into the simulation laboratory II, and began to explore the performance, and then entered the laboratory with the school girl to prepare light source samples, starting from cutting silicon wafers.
Early Friday morning.
Xu Qiu entered the simulation laboratory II to check the results.
Xuemei’s B4T-8 series of 3D-PDI receptors and PCE10 donors have the highest efficiency in organic photovoltaic systems.
The highest value is 9.17%!
"The highest efficiency has really been blown up, I haven't covered the heat yet." Xu Qiu muttered, "However, at least I had it."
Xu Qiu's mentality is very relaxed. Even if the school girl is doing higher, the articles she posted are second-hand by herself, rounding up, is probably equivalent to breaking her own record.
And he is not very surprised by this result. After all, the second-generation 6-series of the school girl has the highest efficiency value of 7.5%, and now it is the third-generation 8-series, which uses the two-step element that is quite effective in the Xu Qiu system. Structural optimization methods-modification of the side chain of the nitrogen atom and the introduction of selenium atoms, the efficiency surge is also normal.
Moreover, in this simulation experiment, Xu Qiu integrated all the device processing strategies of the early 3D-PDI system. It took a full twelve hours to test hundreds of conditions in order to achieve the goal in one step and directly improve the efficiency.
In other words, if you want to further optimize the processing conditions of the device, so that the efficiency will be improved, the space is not large, and the performance upper limit of the material has basically been reached.
Want to improve further, unless you broaden the donor library or subvert the existing coating methods.
The former is easy to understand, but it takes time to accumulate.
The latter refers to the special coating method developed by researchers, including the thermal spin coating method developed by Xu Qiu before; there are also some reports in the literature, such as the "layer after layer" spin coating method, which is Separate the donor and the receptor by spin-coating twice; in the "reverse coating" spin-coating method, in the final process of spin coating to form a film, the substrate is rotated face down, etc...
There are only three or two articles on special coating methods. After being reported, there are almost no imitators, and the effect looks mediocre.
For example, an article by ACSAMI uses the "reverse coating" spin coating method. They use the standard PCE10:PCBM system. The device efficiency obtained by normal spin coating is 8.0%, while after "reverse coating", the efficiency is improved To 8.8%, but this system, Xu Qiu casually made the standard sample efficiency is more than 10%, so he always feels that they are playing acrobatics, and there is no interest in imitating them.
After reading the 9.17% data several times, Xu Qiu began to calculate:
"Today, Friday, all day to prepare light source samples, Saturday to test the light source, and one day off on Sunday. The actual experimental results will not be available until Monday."
"Although it will be delayed for a few days, but good things are too much trouble. I can bear this loneliness."
"However, the positioning of this job seems a bit awkward..."
On the one hand, under the premise that Xu Qiu's system intends to impact NC, although her system is more efficient, she has no chance to be in NC. Unless she can submit articles before Xu Qiu, the upper limit of the article is AM, JACS , EES materials, top chemistry journals.
On the other hand, most of the work on the second-generation 6 series in her hands has been carried out, and the characterization is basically complete, and the articles are almost written. It is impossible to abandon the second-generation molecules and directly write the third-generation articles. Once her article on the second generation of molecules is published, the novelty of the third generation of molecules will be greatly reduced.
Research colleagues are not fools either. You can see the similarities between these two molecules at a glance, especially the articles of the same research group.
In other words, it is difficult to publish two top journals at the same time for the two jobs of the school girl, but one of the AM level is definitely available, and the other one can almost publish a weak one such as CM and JMCA.
Of course, if Teacher Wei is an academician, none of this is a problem. Both AM articles are trivial.
After all, the academic circle is also a circle of people, and there are also so-called "students" and "mountains".
"Students" refer to those who dominate and monopolize the education and academia by their influence, and can also refer to the exclusive power formed by people who graduated from a certain school in a specific occupation or organization.
In layman's terms, researchers in a field are mostly occupied by the same faction. For example, they are all in the relationship of brothers and sisters, and they are inherited from the family, and other people who want to come in and get a share of the pie will be largely excluded.
The severity of the phenomenon of "learning clique" in China is roughly between the beautiful country and the neon country.
The scientific research atmosphere of the beautiful country is indeed one of the best in the world, and it is also a place where many scientific researchers are flocking to it. Many people run from the country and never return;
As for the Neon Country, because of the lifelong hereditary system and the relatively small circle, it has created a circle of academic circles with universities as its core and monopolizes all walks of life in the Neon Country.
The performance of the "student clan" in publishing articles is that it is relatively easy to publish some top journals with the corresponding authors of the big brothers.
However, journal companies are mainly international companies, after all, your boss is powerful, and occasionally produces a few top journals, and the operation is successful. It has always been unrealistic.
As for squeezing out outsiders, preventing them from publishing articles is also very difficult to operate. If a job is really well done and high-level, you can’t stop it at all. The editors of the journal company are not fools. Look for a few during peer review. That's it for reviewers from abroad and outside the circle.
The main "benefits" brought by the "student celebrity" is still in the aspect of scientific research funding. If there are people behind, it will go smoothly and it will be easier to get good projects.
In addition, there is promotion. If you follow the right person, you can just mix it up. Even if there is no result, it is not difficult for a lecturer to become an associate professor;
Or the professor wants to comment on hats such as "Jieqing" and "Yangtze River". More or less contacts are also useful, but to this level, contacts are more icing on the cake, and more importantly, personal ability~www.mtlnovel .com~Similar to a minister who wants to make progress, he mainly needs to rely on his actual political achievements.
...
Xu Qiu and Han Jiaying met for an early exercise and breakfast, after which the two came to the laboratory to prepare light source samples together.
This time there are a lot of samples. The organic trio made nearly a hundred samples. They worked all day to finish. Among them, the number of school girls is the largest, with 14 systems and 42 samples. Secondly, there are 8 systems and 24 samples, but Xu Qiu's is the least, only 7 systems and 21 samples.
On Saturday, the three people went to the light source, and it took a full twelve hours and twenty minutes to test all the samples. For the first time, the entire twelve hours were used up, and the next set of twenty minute.
Fortunately, during the daytime test, the three people rotate. Although a little tired, it is still acceptable. If you test overnight, you may have to rest for more than ten hours after the test.
In the process of testing, Xu Qiu's samples were arranged in the first priority for testing, and he has processed the GIWAXS data by the way.
The result is consistent with the previous guess. The crystallinity of 3D-PDI molecules is not strong in the blend film.
Xu Qiu puts the test results into the main text and fills in the text description according to the previously reserved template.
On Sunday, Mr. Feng Shengdong returned the TAS test results of Xu Qiu’s samples and added three paragraphs of description text; at the same time, TRPL also re-tested. Due to the different test equipment, the new results are slightly different from Xu Qiu’s previous test results. However, the main conclusions were basically the same, and Feng Shengdong added half of the description text.
Xu Qiu integrated the results of TRPL and TAS into his article and obtained the final draft version of the NC article.
What a fulfilling weekend!