I Have a Research Support System

On Friday afternoon, Han Jiaying and Wu Shengnan returned from Zhangjiang.

Xuemei has already synthesized the H4x series of donor materials with silane side chains, H41, H42 and H43, but the second generation of PBDB-T derivatives has not yet been completed, and taking into account the exam review still slowed down her experimental progress a lot .

The post-doctorate 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 ready-made, so only the final One-step reaction, followed by liquid chromatography separation and purification, it didn't take too long.

Xu Qiu copied these materials into the simulation laboratory to explore their performance.

The folding bed that Wu Feifei bought online for Mo Wenlin and the N-piece set for the bed have arrived, and Dong Ge's delivery speed is relatively stable.

Mo Wenlin asked two boys, Xu Qiu and Duan Yun, to help carry the luggage, and then successfully moved into Wu Shengnan's dormitory.

The masks and shutters that Xu Qiu asked Duan Yun's brother to order before had also arrived. He picked up the courier at the concierge on the first and second floors of the material, unpacked and inspected the goods.

The mask plate is roughly a square thin iron sheet with a side length of about 25 cm, a thickness of about 1 mm, and 25 identical square patterns in the middle. With evaporation equipment, a maximum of 25 devices can be prepared in each batch, and there are a total of the same pattern. two.

The shielding board is a square thin iron plate with a side length of about 5 cm and a thickness of about 5 mm. There are small square holes of different areas dug in the middle. There are specifications of 0.01, 0.04, 0.09... square centimeters, and the shielding boards of each specification also have two slices.

Duan Yun suddenly appeared next to Xu Qiu, patted the latter on the shoulder and asked, "I have received the goods, how do you feel?"

"The new ITO substrate hasn't arrived yet, and it hasn't been sent out for testing yet, but..." Xu Qiu changed the subject: "These dozen or so iron chips only sell for 2,500 yuan, isn't it a bit dark..."

"You don't understand that, don't you?" Duan Yunkou Ruoxuanhe introduced: "The precision of the masks and baffles processed by my brother is very high, both at the micronano level, and the area error is less than one thousandth. And all of them are made of wear-resistant stainless steel, Barabara..."

"Stop, stop, stop, I'm just making fun of it," Xu Qiu said helplessly, "Brother Duan Yun, you have such an eloquence, why don't you do scientific research and sell it?"

"Don't tell me," Duan Yun said with a smile, "After I graduated with a master's degree, I worked in a similar sales job for more than two years. Later, I found sales to be quite boring. I wanted to improve my education, so I came here to study. It turns out that studying for a Ph. D. is quite boring, but once you get on the thief ship, you can’t get off. Fortunately, the articles are almost enough now, and it’s good to be able to graduate 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 11.75%, which is the highest device efficiency obtained by Xu Qiu so far, which is 12.2% away from the world record. It's just one step away.

It's still a bit of a pity that it almost broke 12%.

The system is H43:IT-4F, both materials are new materials, some advanced.

At present, Xu Qiu has three non-fullerene systems with an efficiency of more than 11%, including the current H43:IT-4F, and the previous two H22:IT-4F, PCE10:FN-4F.

Before the old articles are finished, the new articles are already waiting in line on the road.

Of course, it is basically impossible for these jobs to write a CNS main publication. No matter how you say, the efficiency must be 15% to have a chance.

As for the major sub-journal of "Nature", if Xu Qiu directly announced the ITIC system without the help of Xu Zhenghong's previous "Nature·Materials", then there is still a chance, but now it is a bit difficult.

The main reason is that the review period for articles of this level is usually very long, and Xu Zhenghong’s article may have been prepared a year ago.

At present, the results of the ITIC series will soon be in the blowout period, and some cannot afford to delay. It is hard to say what it will be like in a year. If the efficiency alone is used to support the article, unless the efficiency can reach 13.5%, 14% and so on. If there is an unsurpassable record, there is still a chance.

Otherwise, you have to accumulate slowly, just like Xu Zhenghong's "Nature Materials", a lot of ADA work was done in the early stage, and the final IDTBR was published on "Nature Materials".

Xu Qiu can see a similar path, which is to publish several 11% and 12% non-fullerene systems in his hands, leading the research direction in the field of organic photovoltaics. At this time, he will publish some prospects for this field and submit an article "Nature "Materials" or "Nature Energy", the new major sub-journal of "Nature", the chances of the article being published will be greatly increased.

The "peer review" system for publishing articles in the scientific research circle, if you want to publish a top journal, you must either work very NB and impeccable, or you must accumulate momentum and reach a certain level of influence. Rely on their influence.

However, although the bosses have privileges, there are also some shady and black-box operations, but overall it is relatively fair, as long as you can do it, you can also go.

Moreover, big bosses don't mindlessly pour water, and use things like influence less. If there is no new achievement as a supplement, even big bosses will also fall from the altar.

On Sunday, Xu Qiu received 500 pieces of new ITO substrates from "Sauhua Conductive Glass".

The ITO substrates Mr. Wei imported from Pretty Country were packed in foam boxes, 100 pieces per box, and each substrate occupied a dedicated storage slot, which had been cut and placed separately.

In China, a large piece of conductive glass is bought. Each large piece is about 10 cm long and 3 mm thick. It is divided into 16 small pieces in the form of 4*4.

The size of each small piece is 1 square inch, that is, the side length is 2.54 cm. It is etched with the "globe" pattern designed by Xu Qiu before. There are scratches on the edges between the small pieces, which are similar to those treated by glass knives. You need to break them by yourself to use.

The side with the ITO pattern on the small piece is protected by a layer of plastic film, which needs to be torn off before use.

The large pieces were directly stacked together, a total of 32 large pieces, that is, 512 small pieces. It seems that because the number is not complete, the other party sent a few extra pieces.

Xu Qiu put on the gloves, broke off two big pieces of "bang", "bang", and "bang", a total of 32 small pieces came out, it was not difficult to break off, and could be separated with a little force.

He picked up one at random and tore off the protective film on it. The ITO thin film electrode reflected lavender light.

With this batch of ITO substrates and the masks 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, who was sorting out her papers, and had no intention of making devices, so he took Mo Wenlin into the laboratory.

Seeing this, Han Jiaying also followed.

Xu Qiu and Han Jiaying made eye contact: "***?", "***!"

Afterwards, he instructed Mo Wenlin: "Use this new substrate to make 20 devices today, and the conditions are the same as those of the previous batches."

Mo Wenlin looked at Xu Qiu, then at Han Jiaying who was following him with her hips akimbo, nodded and said, "Okay."

"Go teach Mo Wenlin how to make devices, and I'll change the mask." Xu Qiu said casually.

Han Jiaying tilted her head and considered for a while, then said, "Okay~"

Xu Qiu put the mask plate, baffle plate, etc. into the evaporation glove box next to it, then entered the glove box, and opened the evaporation chamber.

The mask plate of the evaporation instrument is fixed under the sample stage, and it is troublesome to disassemble.

In the first step, the entire sample stage needs to be removed.

Xu Qiu observed and found that the sample stage was fixed on the top of the evaporation chamber by three nuts.

He first removed the sample holder on the sample stage to reduce the weight of the sample stage, and then looked for the tool basket in the glove box, but he did not find a large tool such as a wrench, so he planned to directly replace the three screws with his hands. Unscrew it.

After getting started, he found that the mask plate had not been replaced after the sample stage was installed, and the screws were very tight.

Xu Qiu could only perform miracles vigorously, and let out strange sounds of "um—" and "um—" to accumulate energy, which attracted Mo Wenlin and Han Jiaying's sideways glances.

After finally removing the three screws, there are still 6 washers.

Xu Qiu carefully put them in a small space surrounded by packing tape to prevent them from being lost.

He then began to inspect the sample stage.

The sample table is a three-layer sandwich structure. The upper layer is used to place the sample holder, the mask is sandwiched in the middle, and the lower layer is a hollow square bracket used to fix the mask.

There are also four hexagonal screws to fix the position of the mask. Xu Qiu tried it, and this time it was fixed very tightly. It cannot be removed by hand, and a hexagonal screwdriver is needed.

He rummaged through the tool basket and found several hexagonal screwdrivers of different sizes, which were cylindrical on the outside and hexagonal on the inside. After trying several models, Xu Qiu found the right one.

With tools, it was much easier to disassemble this time. Xu Qiu carefully put the removed four hexagonal screws together with the previous few nuts and washers.

"The main difference between humans and animals is whether they can use tools or not. The ancients did not deceive me." Xu Qiu began to change the mask plate after complaining inwardly.

The original mask plate has been plated with an unknown number of layers of metal materials on the shielding part, and now it looks shiny silver. It should be the silver electrode used in the evaporation last Friday.

Xu Qiu replaced the mask with a new one, fixed it with four hexagonal screws, and remembered the direction of the pattern.

The substrate is square, and if the symmetry is ignored for a moment, there are four orientations that can be placed on the sample holder.

The pattern of the ITO substrate imported from the beautiful country can be overlapped by rotating 180 degrees. Therefore, two of the four directions are the correct placement directions.

Gong Yuanjiang’s windmill-shaped ITO pattern 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...

However, the current ITO pattern in the form of a globe needs to be rotated 360 degrees to coincide. That is to say, only one of the four directions is correct. If the direction is wrong, the evaporated device will fail.

It is still a bit difficult to install the new mask plate, because it must be very accurate. If there is a deviation of 0.1 cm here, the evaporated metal electrode will also be offset by 0.1 cm. If the installation is crooked Well, the evaporated metal electrodes will also be crooked...

It took Xu Qiu five minutes just to align the position.

Mainly because it was his first time and he had no experience.

PS: Continue with four chapters and ten thousand changes.