Chapter 328: The first time, no experience


On Friday afternoon, Han Jiaying and Wu Shengnan returned from Zhang Jiang.
The school girl has synthesized the H4x series donor materials with silane side chains, H41, H42 and H43, but the second-generation derivatives of PBDB-T have not been completed yet, taking the exam review into account has slowed down her experimental progress. .
The postdoctoral sister also completed the synthesis of three non-fullerene acceptor materials: IT-4F, IT-DM, and FN-4F. Because the D and A units of these three materials are readily available, only the final One-step reaction, and then liquid chromatographic separation and purification, it doesn't take too long.
Xu Qiu copied these kinds of materials into the simulation laboratory and started exploring the performance.
The folding bed Wu Feifei bought for Mo Wenlin on the Internet, and the N-piece bed set have arrived, and Dongge's express delivery speed is relatively stable.
Mo Wenlin asked Xu Qiu and Duan Yun to help carry the luggage, and then successfully moved into Wu Shengnan's bedroom.
Before Xu Qiu asked Duan Yun and his brother to order the masks and baffles, they have also arrived. He picked up the courier at the gatehouse on the first and second floor of the material and unpacked them for inspection.
The mask is roughly a square thin iron sheet with a side length of about 25 cm, and a thickness of about 1 mm. There are 25 identical square patterns in the middle. With the evaporation equipment, each batch can prepare up to 25 devices, and there are a total of the same patterns. Two.
The shielding plate is a square thin iron plate with a side length of about 5 cm and a thickness of about 5 mm. There are square small holes of different areas in the middle. There are two shielding plates of each specification.
Duan Yun suddenly appeared next to Xu Qiu, patted the latter on the shoulder and asked, "How do you feel after receiving the goods?"
"The new ITO substrate hasn't arrived yet. It hasn't been sent for testing yet, but..." Xu Qiu said, "These dozen iron plates are sold for 2500 yuan, is it a bit dark..."
"You don't understand it," Duan Yunkou said, "The accuracy of the mask and baffle plate processed by my brother is very high. They are all at the micro-nano level, and the area error is less than one thousandth. And they are all made of wear-resistant stainless steel, Barabara..."
"Stop, stop, I just spit out," Xu Qiu said helplessly: "Speaking of brother Duan Yun, you have this eloquence, so what about scientific research? Isn't it good to do sales?"
"Don't tell me," Duan Yun smiled: "After I graduated from my master's degree, I did a job similar to sales for more than two years. Later, I felt that sales were quite boring. I wanted to improve my education, so I came here to study. Bo, it turns out that it’s quite boring to read a Bo, but I can’t get off when I get on the thief boat. Fortunately, I have almost enough articles now, and I hope I can graduate successfully next year."
In the evening, Xu Qiu obtained the performance data of several systems from the simulation laboratory, mainly the H4x system of the school girl. The highest efficiency reached the highest device efficiency obtained by Xu Qiu so far, which was only one step away from the world record of 12.2%. Far away.
It’s a pity that it almost broke 12%.
The system is H43: IT-4F, both materials are new materials, a bit advanced.
At present, Xu Qiu has a total of three non-fullerene systems with an efficiency of more than 11%, including the current H43: IT-4F, and the two previous articles have not been finished yet, and the new article is already in Waiting in line on the road.
Of course, it is basically impossible for these jobs to be published in a CNS main journal. How to say the efficiency is 15%, and there is a chance.
As for the "Nature" Da Zi magazine, if Xu Zhenghong's previous "Nature·Materials" had not been mixed in, and Xu Qiu directly published the ITIC system, there would still be a chance. Now, it will be a little difficult.
The main reason is that the review period for articles of this level is usually very long. Xu Zhenghong and others may have started preparing for a year ago.
At present, the results of the ITIC series will be in a blowout period, and some cannot be delayed. It is difficult to say what will develop in a year. If efficiency alone supports the article, unless the efficiency can reach 13.5%, 14%, etc. The record that the child cannot surpass, there is still a chance.
Otherwise, you have to accumulate slowly, just like Xu Zhenghong's "Nature·Materials", a lot of ADA work was added in the early stage, and the final IDTBR was released and successfully boarded "Nature·Materials".
The similar path Xu Qiu can see is to publish several 11% and 12% non-fullerene systems in his hand, leading the research direction in the field of organic photovoltaics. At this time, he will publish some prospects in this field and submit an article "Natural "Materials" or "Nature"'s new big magazine "Nature·Energy" will greatly increase the chances of article submission.
The system of "peer review" for publishing articles in the scientific research circle, if you want to publish a top journal, you must work very well and impeccably, or you must accumulate momentum and reach a certain degree of influence. Rely on their influence.
However, although the bigwigs have privileges, there are also some shady, black box operations and other phenomena, but overall it is relatively fair, as long as you can, you can also go.
[Send red envelope] Reading benefits are here! You have up to 888 cash red envelopes to be drawn! Follow the weixin public account [Book Friends Base Camp] to draw red envelopes!
Moreover, the big boss will not be brainless, using something like influence will be less. If there is no new result to supplement it, even the big boss will fall into the altar.
On Sunday, Xu Qiu received 500 new ITO substrates from "Suohua Conductive Glass".
Previously, the ITO substrates imported by Teacher Wei from Beautiful Country were packed in foam boxes. A box of 100 pieces, each of which occupies a dedicated storage slot, has been cut and placed separately.
And what I bought in China is a large piece of conductive glass, each of which is about 10 cm long and 3 mm thick, and is divided into 16 small pieces in the form of 44.
The size of each small piece is 1 square inch, which is 2.54 cm in length on a side. It is etched with the "Globe" pattern designed by Xu Qiu before. There are scratches similar to the glass knife treatment on the edge between the small pieces. You need to break it by yourself. To use.
The side with the ITO pattern on the small piece is protected by a plastic film, which needs to be removed before use.
The blockbuster films are directly stacked together, a total of 32 blockbusters, that is, 512 small films, it seems that because of the uneven number, the other party sent a few more films.
Xu Qiu put on his gloves and broke the two large pieces of "bang", "bang", and "bang". A total of 32 pieces came out. It was not difficult to break, and they could be separated with a little force.
He picked up one piece at random and tore off the protective film on it. The ITO film electrode reflected light purple.
With this batch of ITO substrates, plus the mask that arrived on Friday, the materials are ready, and Xu Qiu is ready to try to prepare a batch of devices with new patterns.
Xu Qiu glanced at Wu Feifei, sorting out her article, and without the will to make devices, he took Mo Wenlin into the laboratory.
When Han Jiaying saw this, she also followed.
Xu Qiu and Han Jiaying exchanged eyes: "?", "!"
Afterwards, he instructed Mo Wenlin: "Today, we will use this new substrate to make 20 devices. The conditions are the same as those of the previous batches."
Mo Wenlin looked at Xu Qiu, then at Han Jiaying, who followed him with her hips akimbo, nodded and said, "Okay."
"You go teach Mo Wenlin to make devices, I'll change the mask." Xu Qiu said casually.
Han Jiaying tilted her head to consider for a while, and said, "Okay~"
Xu Qiu introduced the mask and baffle into the evaporation glove box next to him, then entered the glove box and opened the evaporation cabin.
The mask of the evaporation apparatus is fixed under the sample stage, which is troublesome to disassemble.
In the first step, the entire sample stage needs to be unloaded.
Xu Qiu observed and found that the sample table was fixed on the top of the vapor deposition chamber by three nuts.
He first removed the sample holder on the sample table to reduce the weight of the sample table, and then looked for the tool basket in the glove box, but did not find a large tool such as a wrench, so he planned to hand the three screws directly Unscrew it.
After getting started, he found that the mask had not been changed after the sample stage was installed, and the screws were very tight.
Xu Qiu could only perform miracles vigorously, making strange sounds of "Uh-" and "Uh-" to accumulate energy, causing Mo Wenlin and Han Jiaying to look sideways.
Finally, the three screws were removed, along with 6 spacers.
Xu Qiu carefully placed them in a small space enclosed with sealing tape to prevent loss.
Then, he began to check the sample table.
The sample stage is a three-layer sandwich structure, the upper layer is used to hold the sample holder, the mask is sandwiched in the middle, and the lower layer is a hollow square holder to fix the mask.
There are four hexagonal screws to fix the mask. Xu Qiu tried it. This time the fixation was very tight and it couldn't be removed by hand. He needed a hexagonal screwdriver.
He rummaged through the tool basket and found several hexagonal screwdrivers of different sizes, the cylindrical shape on the outside and the hexagonal shape on the inside. After trying several models, Xu Qiu found the right one.
With the tools, it was much easier to disassemble this time. Xu Qiu carefully put the four hex screws that had been removed with the previous nuts and washers.
"The main difference between humans and animals is whether they can use tools or not. The ancients don't deceive me." Xu Qiu started to change the mask.
The original mask has been plated with an unknown number of layers of metal material on the mask. Now it looks shiny and silver. It should be the silver electrode used for evaporation last Friday.
Xu Qiu replaced the new mask with four hexagonal screws and remembered the direction of the pattern.
The substrate is square. If the symmetry is temporarily ignored, there are four directions for placing it on the sample holder ~EbookFREE.me~.
The pattern of the ITO substrate previously imported from Beautiful Country can be overlapped by rotating 180 degrees. Therefore, two of the four directions are the correct placement directions.
Gong Yuanjiang's windmill-like ITO patterns can be overlapped by rotating 90 degrees. Therefore, the four directions can be placed at will without affecting the final evaporation result, unless the front and back of the substrate are reversed...
The current ITO pattern in the form of a globe must be rotated 360 degrees to overlap, which means that only one of the four directions is correct. If the direction is not correct, the vapor-deposited device will fail.
It is still a bit difficult to install a new mask, because it must be very accurate. If the deviation is 0.1 cm here, the vapor-deposited metal electrode will also be offset by 0.1 cm. If the installation is crooked Now, the metal electrode deposited will also be crooked...
Just aligning the position, Xu Qiu spent five minutes.
Mainly it was his first time, no experience.
PS: Continue four chapters and more.
Latest chapter of Ebook I Have a Research Support System Click here