Chapter 389: I want to be quietly top-notch, and then surprise everyone

Xu Qiu prepared a series of gold (1nm)/silver (10-20nm) thin-layer metal electrodes with different thicknesses based on the two benchmark near-infrared systems PCE10:-4F and PCE10:FNIC-4F.
The final device results are not bad. With this double-layer thin-layer electrode structure, the device efficiency is generally about 0.5%-1% higher than the original single-layer thin-layer electrode structure.
Among them, a key node is the double-layer electrode structure of 1 nanometer gold and 15 nanometer silver.
At this time, the device efficiency of the PCE10:-4F system can reach 10.25%, the average visible light transmittance (AVT) can reach 32%, and the two values ​​of the other system have reached 9.73% and 34%, respectively.
The AVT is only 30%, which seems to be very low, but it is actually very good in translucent devices based on thin metal electrodes.
Take the metal thin-layer electrode with a total thickness of 16 nanometers, it can absorb nearly 40%-50% of visible light by itself.
This also means that even if the effective layer is empty, the AVT is only 50%-60% at most.
Converted, 30% AVT, the effective layer itself AVT may reach more than 60%.
For these two systems, Xu Qiu intends to merge them and publish an article, so that there are both workload and bright spots.
Highlights include "simultaneously achieving efficiency exceeding 10% and AVT breaking 30% achievements", "developing a thin layer electrode with a double-layer structure", and "the first translucent device with a non-fullerene system."
Of course, it is not easy for this job to break the barriers and invest upwards, because firstly, no new materials have been developed, and secondly, the efficiency is not the kind that broke new highs. It just broke the record in a subdivision field.
However, there is still a great opportunity for AM.
Xu Qiu calculated the articles in his hand, five articles in one district, one article that will become one district when it is out of the district at the end of the year, and two articles in one district that are currently being voted, and the current system adds up to a total of Nine articles and one district.
Only one article is enough to collect ten chapters and complete the advanced tasks of the system.
Xu Qiu thought about it for a moment, and then thought of an idea.
That is to cooperate with Blue River to prepare flexible, translucent, colorful, all-solution-processed organic photovoltaic devices by scratch coating.
The devices prepared in this way have almost all the "advantages" of organic photovoltaics, but they are not prepared in large size, roll-to-roll, and are full of gimmicks.
In this way, as long as the efficiency does not stretch the hips, it can reach about 7%, 8%, and an AM is basically appropriate.
In the first step, the receptor material is selected.
Now that the two near-infrared receptors -4F and FN-4F have been used, I will use the other -4Cl material from my sister.
The performance of this material is equivalent to -4F, it is also an excellent near-infrared non-fullerene acceptor material, and the highest device efficiency is close to 12%.
The second step is to select the donor material.
If you want to achieve colorful devices, the receptor has been fixed, so you can only make a fuss from the perspective of the donor.
Xu Qiu plans to choose three donor materials with different band gaps, and finally selected H43, J2 and PCE10, with band gaps around 2.0, 1.8, and 1.6 respectively.
To be honest, the system was selected, but Xu Qiu could not know the color of the spin-coated film just by looking at the material name.
So he prepared a solution, spin-coated it by himself, and tried it.
The results showed that the film color of the system with -4Cl as the acceptor and H43, J2 and PCE10 as the donor corresponded to purple, blue and blue-green respectively.
It is easier to know the result to reverse the process.
Xu Qiu checked the data and found that the wavelength ranges of purple light, blue indigo light, and green light correspond to 350-455 nanometers, 455-492 nanometers and 492-577 nanometers, respectively.
The main light absorption ranges of H43, J2, and PCE10 are 450-650 nanometers, 500-700 nanometers, and 550-750 nanometers, respectively. -4Cl covers 650-1000 nanometers of light.
The wavelength ranges of the remaining unabsorbed light are 300-450 nanometers, 300-500 nanometers, and 300-550 nanometers, which correspond to purple, blue, and blue-green.
Since these films are translucent, the light that the film transmits will show what color.
Then the three films correspond to purple, blue, and blue-green, which can be explained.
Xu Qiu handed it over to Simulation Lab III for the specific exploration work, but he did not have much hope for the time being, because the squeegee machine copied before was still a toy concept machine.
He planned to take the time to go to Blue River to see if they had any latest developments, and then copy the new machine in.
After establishing the two work directions, Xu Qiu actually wanted to find another semi-transparent device research work as a reserve of an AM article.
This can be considered a rainy day.
Although Xu Qiu has no experience of rejection of the manuscript so far, it is hard to say that he was out of luck that day and ran into cutie after walking the night, and encountered various deliberately targeted reviewers.
Now there are ten articles in one area, and it will be embarrassing if one is missing.
However, he thought about a lot of ideas in his heart, and he was not too satisfied, because there are not many points that can be excavated on the translucent device. The two previous ideas are about to dig out the bright spots.
If there are no bright spots, AM articles are not so good, unless you synthesize new materials yourself, or borrow several new structures from Wu Shengnan, but in this case, the work cycle will be very long.
As for picking up some highlights at will, Xu Qiu will not consider it for the time being.
He has raised the lower limit of his own articles to the AM, JACS, Angew, EES, AEM, NC level, which is the top issue of the district.
This threshold is higher than that of Wei Xingsi. Most of the articles in Wei Xingsi's group are articles above the second district. Only Duan Yun posted the only article in the third district, RSCAdv.
After all, Xu Qiu is a student, and every article he writes must be coded word by word, but Wei Xingsi only needs to change the article and post the newsletter, and the energy consumed varies greatly.
Therefore, if Xu Qiu spends his energy on writing articles in the second district, it is not very cost-effective. Like the second district articles, it is good to just use the second articles of other people in the research group, so as to increase the number of his own articles.
Moreover, when the number of articles reaches a certain level, others will pay more attention to how many AM and JACS top publications you have published, how the articles are cited, and what your representative works are.
For example, based on Xu Qiu's current results, the scientific research influence is 10, then if you add three or five articles in the second district and one work, the scientific research influence may increase to 10.1, which does not make much sense.
In the end, Xu Qiu decided to finish these two tasks first.
The job at the moment is the most important thing. Doing scientific research must not be procrastinated, or your colleagues will teach you how to be a human being.
Now that there is no translucent device based on non-fullerene receptors, it doesn't mean that no one is doing it. Maybe any colleague is doing it quietly.
There is something to say.
I want to top the top quietly, and then surprise everyone.
It's hard to say, there will be an unknown research group that suddenly produces a bunch of results.
For example, Xu Qiu and Wei Xingsi, who were previously unknown in the field of organic photovoltaics, have recently been on the list of major organic photovoltaics research groups in China and have been targeted by their peers.
Xu Qiu was just an undergraduate before. Before returning to China, Wei Xingsi worked as a small boss in NREL, a beautiful country. Although he posted a few AM articles, he was a PDI derivative, which was relatively small, not very efficient, and he was not very famous.
In fact, if Wei Xingsi returns to China a few years later, based on his previous achievements, it is estimated that he will not necessarily be rated as "Qingqian", nor may he enter the Magic City University.
At most, you can only enter an ordinary copy, and then sign a six-year non-promotion agreement similar to a foreign assistant professor.
Over the years, the standards of "Qingqian" have become stricter and stricter. Wei Xingsi was introduced by the second batch of Qingqian, which was in 2012, when the country was short of people and the standard set was relatively low.
For example, in the batch of "Qing Qian" who returned to China this year, several people have more than a dozen JACS, and some even have CNS one, and the gold content is very high.
If a few years pass, the lower limit of "Qing Qian" may be more than a dozen AM and JACS articles.
I have to say that the academic circle is getting more and more volume, from top to bottom.
Speaking of Xu Qiu, he now has a great first-mover advantage in making translucent devices.
However, this advantage will slowly fade over time, and if he can't continue to lead, he may be overtaken by others.
For example, many colleagues have already started ITIC research, and sooner or later they will put their goals in other derivative systems.
Of course, it takes time to change careers. Except for Gong Yuanjiang and Wei Xingsi, the others will not change careers too quickly.
On the one hand, when other researchers switched from the traditional fullerene system to the non-fullerene system, it was impossible to make a big step at once in order to achieve stability.
There is a high probability that some benchmark systems will be selected first, such as Xu Qiu's ITIC and Xu Zhenghong's IDTBR, and will not engage in derivatives such as IT-4F as soon as they come up.
On the other hand, many research groups do not synthesize materials by themselves, but buy from optoelectronic materials companies. For example, the optoelectronic company in Shencheng has already begun to sell ITIC and IDTBR materials, but other types of ITIC derivatives are temporarily available on the market. No company has sold yet.
This is because the optoelectronic materials company also knows that "researchers will start with the benchmark system when they change careers." Therefore, the synthesized benchmark materials will definitely have a market.
Moreover, benchmark materials like ITIC are likely to be popular for a long time. They are similar to the first generation organic photovoltaic donors and acceptors such as P3HT and C-60. They have been used for more than ten years and are still in use today. Even if better PCE10 and PCBM are developed later, they will still be used as standard samples by some research groups.
Therefore, a few grams, dozens of grams of ITIC will be synthesized, and it will be stored there, and it will not worry you can’t sell it for a while.
But other derivative materials are hard to say. For example, Xu Qiu and the others have produced more than a dozen systems. It is impossible for all of these systems to fire. In case a certain material fails to fire, the optoelectronic company will synthesize dozens of grams. In the end, no one bought it, and it all fell into his hands.
This is also one of the reasons why materials such as ITIC derivatives do not apply for patents in scientific research circles, because the iteration of materials is too fast.
If you want to apply for a patent for a molecule, you cannot post an article during the patent application process. Once the structure is published to ~EbookFREE.me~, the patent will be considered abandoned;
Secondly, the time required to apply for a patent is a few months less. In the long term, a year is possible. After a year has passed, the patent may not be filed yet, and others have already reported this structure. This is also regarded as a structure Publicity, patent applications are also directly invalidated.
Even if this molecular structure has not been discovered by others, it may be because others have found better materials and better systems, and holding this patent is meaningless.
Taking a step back, even if this kind of patent application arrives, it doesn't make much sense.
It’s a big deal for others to develop new materials without using the materials you developed. You can’t apply for all related materials.
And doing so will not only have no profit, but it is also not conducive to the development of the field, and it will arouse the resentment of other scientific researchers.
After careful calculation, it is a matter of negative income.
Therefore, few people apply for this type of patent, they are only in the field of application, or apply for patents for the molecular structure of some complex drugs.