Chapter 304: Watering plan in AM Top News

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At 8 pm, Xu Qiu went to 218 and reported today's test results to Teacher Wei.
"Oh, the efficiency has exceeded 10%?!" Hearing the news, Wei Xingsi immediately stopped what he was doing, raised his head, and said with a smile: "Chen Wanqing had been tinkering for a long time, but the efficiency has been stuck at 6% and 7%. Go, you still want Xu Qiu to go!"
"Uh..." Xu Qiu scratched his head and defended the senior sister: "Senior Chen Wanqing has done a lot. Without her early work, it would take a lot of effort for us to do synthesis now."
Later, he handed the U disk he had brought to Teacher Wei and said: "Here are the detailed performance data of this test and my next synthesis plan."
"Very good!" Wei Xingsi opened the PPT in the U disk, checked it carefully, nodded repeatedly, and finally commented: "The steady and steady style is very good, just follow your current plan."
There is no mention of the synthesis of donor materials in the PPT. Xu Qiu added an extra sentence: "We also need to enrich the types of donor materials. There are not many wide band gap donor materials."
Wei Xingsi thought about it for a while, nodded and said:
"This is a problem. Over the years, narrow bandgap donor materials have been developed for many generations. The current optimal system is PCE10, and wide bandgap materials have not been favored by researchers because they do not match the fullerene system. , It has been in a semi-stasis state before, and there are not many wide band gap materials available, and it is indeed necessary to synthesize it by itself.
You thought of Han Jiaying’s synthesis route in the previous group meeting, or you have a foresight, you have planned it long ago, one after another. "
Xu Qiu gave a "um" and didn't respond much. His idea at the time was that as long as the number of donor and acceptor materials were sufficient and traversed through the simulation experiment system, he could find the optimal system that matched each other. Foresight, it does not conflict with what Teacher Wei said.
Wei Xingsi leaned back and said with a smile: "To be honest, I never thought that the performance of the non-fullerene system of ADA could be so high before. Fortunately, you have prepared in advance, otherwise you can wait. We only started to publish Zhenghong's "Nature·Materials", and it was a little late. As for now, we should be able to publish many good articles, so we have to plan carefully..."
Xu Qiu nodded, and then said: "I plan to use PCE10: ITIC as the benchmark system. Now the efficiency can reach 8%. There is a high probability that I can post an AM-level article, and then I will launch the H22: ITIC efficiency breakthrough. The 10% system can be further extended to other Hxx series, PBDB-T system wide bandgap donors, and ITIC derivatives obtained by optimizing and improving IDTT and ICIN units."
"This idea is good." Wei Xingsi understood what Xu Qiu meant, and first delineated an inefficient PCE10: ITIC standard system. 8% is just right. After that, for every improvement of the standard system, the efficiency can only reach 8 Above %, you can send (water) an article.
After seeing the potential of ADA-type non-fullerene materials, Mr. Wei also had greater ambitions, such as whether he could impact the "Nature" major magazine or even the CNS main journal, so he asked Xu Qiu tentatively: "No Knowing that according to your optimized route, is there a chance for new materials to break the world record of organic photovoltaics and achieve more than 12%?"
"I don't know exactly how much it can reach," Xu Qiu said, spreading his hands, "However, the new system has a high probability of being able to achieve higher than 10%."
"I understand," Wei Xingsi nodded, knowing that he was too impatient, and then said: "Then proceed steadily. Zhang Jiang's synthesis experiment will let Wu Shengnan follow up. You should start with these system components and characterizations. Write a few articles, the current device efficiency should not be as good as the "Nature" major magazine, let's vote for a few more AM and EES, if it involves complex synthesis, we will vote for JACS or Angew."
"Okay." Xu Qiu replied, this is coincident with his thoughts. Now he has the ability to write in the top journals of materials disciplines like AM. Of course it is only temporary, waiting for others to see their reports. After the ITIC structure, we will follow up in time.
There is still an advanced task to choose one of three at hand. It is too difficult to publish the CNS main journal. For the time being, the task of breaking the world record of efficiency and publishing ten articles can be carried out simultaneously.
On the surface, it seems easier to break the efficiency. After all, it is 10% now, and there is a possibility of further improvement.
However, due to the narrow light absorption range, large energy loss, and short exciton diffusion length of organic photovoltaic materials, in the field of organic solar cells, after the device efficiency reaches 10%, every percentage point thereafter is not small. The bottleneck, for example, from 10% to 12% is stuck for six years, and the current world record of 12.2% has stagnated for as many as three years.
That is to say, the D unit uses IDTT instead of IDT, and the A unit uses ICIN-2F instead of ICIN. Although each of these two methods can increase the device performance from 6% to 9%, 10%, they are superimposed. The specific improvement effect is not clear. It is likely to be improved, but it may only be 0.5% or 1%.
The system requirement is 0.5% above the world record, which is 12.7%, which is close to 13%. In fact, it is not so easy to do.
Of course, if luck is against the sky, it is not impossible to directly find a very NB material to achieve a leap in efficiency.
The perovskite photovoltaic system is a living example. It debuted in 2013, and its efficiency reached about 13% not long after it was reported. It has directly become a research hotspot. Now only a few years later, the highest efficiency It has reached 22%. We must know that inorganic silicon solar cells have been developed for 40 years, and the current maximum efficiency is only about 27%.
After discussing today’s test results, Xu Qiu turned the topic to tomorrow’s Jincheng business trip: "There are also PPT and speech drafts on our trip to Kainan University for academic exchanges in the U disk. Teacher Wei, please see if there are any problems. "Before, Teacher Wei only carefully changed the summary part, but did not read the PPT and speech draft.
"Okay." Wei Xingsi looked at the format of the PPT, adjusted the size and position of the individual pictures, and changed a few details without opening the speech draft for viewing, and then said:
"At that time, you will sit in the front row. If you have any specific experimental questions, I may need your help to answer them. By the way, our spraying method will not be revealed at the conference for the time being."
"No problem." Xu Qiu nodded in response.
Each powerful research group has more or less unique skills and will not be easily said.
Even if the spraying method is a unique skill in the research group, when Xu Qiu wrote the experimental details in the article, he only used something like "We prepared the solution with a chlorobenzene solvent and spin-coated the effective layer solution at 3000r.pm to get about 105nm thick. The expression of "film" does not mention how it is spin-coated.
Of course, it is impossible to express the details of each experiment clearly, after all, it is just text, not video images.
"Okay, then you go to work," Wei Xingsi paused, and added: "Tomorrow we will meet again."
Xu Qiu took his U disk and left, and from the corner of his eye, she caught a glimpse of Teacher Wei turned off the communication PPT and opened his "Test Results and Synthesis Planning" PPT again.
It seems that Mr. Wei still cares more about the results of this test than the next academic exchange.
It's also normal. A communication conference like this does not bring any substantial benefits to Teacher Wei.
For scientific research workers, they still need to be hard-working. Only published articles and academic results are real.
At the level of Teacher Wei's "Qing Qian", if you want to go further, your network can only be icing on the cake. It would be more realistic than to come to a few more students like Xu Qiu.
In the three-day conference, the actual meeting time for reports is only one day on Sunday. On Friday and Saturday, the landlord Gong Yuanjiang is responsible for "entertainment". They go out and have fun together to deepen personal connections and connect with each other.
As for why the meeting was held on Sunday, Gong Yuanjiang considered Bazan’s itinerary. It is not easy for him to come from a beautiful country. Domestic exchange visits are relatively convenient.
Friday morning.
The high-speed rail is a five-hour drive from ~EbookFREE.me~ at nine o'clock. The time to reach Jincheng is more than two o'clock in the afternoon, and the time between Xu Qiu and Wei Xingsi is at half past seven.
Xu Qiu got up at six o'clock and didn't prepare too much. He only carried a school bag, a laptop and a set of clothes. It is summer, and his clothes are relatively thin. His school bag is relatively large and can fit in.
Because lunch will be late, Xu Qiu went to the cafeteria to have a big meal before heading to Caiyi.
Xu Qiu arrived ten minutes earlier. Unexpectedly, Teacher Wei had already arrived. He was packing his suitcase and stuffing some small tins of tea from the office.
After waiting for Mr. Wei for a while, the two arrived at the subway station on foot, took Metro Line 10 to the Magic City Hongqiao Station, and then encountered the morning rush hour. There are really many people...
However, you can only take the subway. If you drive by yourself, you will be blocked at this point in time...
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