I Have a Research Support System

Xu Qiu returned to 216 and checked the status of the flight ticket back home on Ctrip.

Because it was a temporary idea, the time to go home was relatively close, and the factors of Chinese New Year were superimposed, so the price of air tickets was generally more expensive. If you look around, there is no price lower than four digits.

However, the price of air tickets back to Shanghai from home is much cheaper.

In the end, Xu Qiu made an appointment to buy a ticket for his return home on January 25 and return on February 18. The single flight time is about three hours.

Among them, the former costs about 1,500, and the latter only costs about 800. In addition to the surcharge of fuel for machine construction, the round trip is about 2,500.

Now, the basic transportation construction in China is already very strong.

Before, when Xu Qiu came to Shanghai as a freshman, because the airport in his hometown hadn’t been built yet, he chose to take the train to the provincial capital first, and then fly to Shanghai, with a stopover of an hour on the way. It takes half a day to get up, not much better than taking the train.

Therefore, Xu Qiu later chose to take the train, and it only lasted 20 hours. The main reason was that it was more trouble-free, and there was no need to transfer back and forth. He bought a sleeper and lay down for a day before going back.

In fact, this is also a common choice of the people. For long-distance domestic travel, people still prefer to choose trains rather than planes.

On the one hand, the train is cheap. If it is the price of a hard seat, Xu Qiu will spend less than 100 yuan to go home. After all, China is still a developing country, with "over 600 million people with an average monthly income of about 1,000 yuan."

On the other hand, there are a lot of people in the country, because the trains carry a relatively high passenger capacity, so the construction of domestic railways is very developed, and most cities can be reached by railways.

And if it is in the beautiful country, the main long-distance travel method is the plane, and the railway construction lags behind our country.

After Xu Qiu booked the plane ticket, he went to 218 to report the situation to Wei Xingsi, in other words, he asked for money.

Wei Xingsi was very straightforward, without procrastinating, he directly transferred 2,500 Ruanmei coins to Xu Qiu, and said: "Before boarding the plane, remember to go to the airport counter and ask if you can print the itinerary."

"Itinerary?" Xu Qiu had only been on a plane once before, so he didn't know much about it, only the boarding pass.

"Yes, the itinerary." Wei Xingsi explained briefly: "The itinerary is the only reimbursement certificate recognized by the school, and it will be used for reimbursement later."

"Okay." Xu Qiu nodded and didn't ask any further questions. He directly returned to 216 and searched for information about "air ticket itinerary" by himself.

This can be regarded as an occupational disease of scientific research. When Xu Qiu encounters something unfamiliar, he always wants to figure it out. Even if he can't figure it out, he still needs to know what it is.

There is never too much knowledge, maybe it will be used later.

After some searching, Xu Qiu learned that air tickets are indeed different from ordinary train tickets.

The train ticket itself can be used for direct reimbursement, but the air ticket is different. What passengers get is only a boarding pass, which cannot be used for reimbursement. If they want to be reimbursed, they need to print the itinerary.

If the ticket is booked directly on the airline's official website, you can find the counter of the corresponding airline before boarding the plane and ask to print the itinerary.

However, if the ticket is purchased from a third-party ticketing company, such as Ctrip, it may not be possible to print the itinerary at the corresponding airline at the airport, because the itinerary can only be printed once in theory.

The third-party ticketing company generally has printed it for passengers in advance, and if necessary, the third-party ticketing company can mail it over.

In addition to the itinerary, third-party ticket companies sometimes provide electronic invoices, claiming that they are valid reimbursement vouchers just like the itinerary.

But in fact, only the itinerary is accepted when the reimbursement is made by the Magic City Comprehensive University.

However, the electronic invoice has an advantage, that is, it does not need to be mailed, and can be printed directly through a PDF file, while the itinerary must be mailed, and the postage is usually borne by the passenger himself.

Therefore, some people don't understand the rules, and choose electronic invoices in order to save money and save postage.

As a result, I was dumbfounded when I got the invoice. I found out that I couldn't reimburse it, and I went to ask for the itinerary, but the other party refused to give it...

As for the difference between electronic invoices and itineraries for third-party ticket companies, it is said that the two types of invoices are different in nature. The former third-party ticket company needs to pay a tax rate of about 6%, while the latter’s tax rate is about 9%.

In other words, if an electronic invoice is issued, the third-party ticket purchase idea may be able to earn a 3% price difference.

This price difference is likely to be gray, but this is the same as the invigilator who cheats in the exam does not necessarily catch it.

Many things are taken into account by the state, and they will not take care of them. They may wait until a certain time to settle accounts after the fall, and collectively carry out rectification and liquidation.

Xu Qiu didn't know it before, but after he got to know it, he found a small itinerary, and there are so many ways in it.

The holiday is approaching, and in the next few days, Xu Qiu and Wu Feifei will handle some chores in the laboratory together.

First of all, it is to meet with the glove box manufacturer in Shanghai to discuss how to plan the glove box.

Because the needs of different research groups and laboratory space are different, glove box manufacturers will not only provide standard glove boxes, but also provide customized functions for customers.

Wei Xingsi's research group is no exception. According to the previous plan, the original two glove boxes need to be spliced ​​together with a new glove box.

That is to say, if you buy a new spin-coating glove box, the functions of the original spin-coating and evaporation glove box will remain the same, and the splicing will be performed according to the "spin coating-evaporation-spin coating" mode.

In this way, the left hand is organic, the right hand is perovskite, and then the evaporation is stuck in the middle.

However, when asking Duan Yun to design specific processing drawings, Xu Qiu and the others found that there were still many problems to be solved.

Not to mention which of the new spin-coating glove box and the old spin-coating glove box is used for organic and which is used for perovskite, this involves the interests of their respective teams.

One of the biggest problems is that there is an evaporation chamber in the middle evaporation glove box.

The evaporation chamber opens sideways, which means that a large space needs to be reserved on the left side of the evaporation glove box.

If the evaporation glove box is stuck in the middle, the connection between the evaporation glove box and the spin coating glove box on its left hand side needs to be very long, which is not conducive to the usual transfer of substrates, materials, reagent.

It is easy to imagine that the length of the transmission compartment of a normal glove box is 40 cm. With this length, it is already difficult to take out the contents of the transmission compartment from the inside of the glove box. Usually, it is necessary to manually put the things in the transmission compartment before transmitting the items. Go to the inside of the transfer bay near the side of the glove box.

Now because of the evaporation cabin, it is necessary to reserve a space of about 80 cm. If such a long transmission cabin is really designed, it is estimated that only gibbons can take things out of it.

However, it is possible to install a pallet with slide rails inside the transport pod.

But if there is a pallet, the transmission cabin, which was originally a cylindrical shape, will become a cylinder that has been cut off by a knife. Not to mention that the internal space has shrunk significantly, and the space pulled out by the pallet must be reserved, which will also occupy The space inside the glove box is also not very convenient.

It is also quite troublesome if you want to modify the evaporation cabin.

Because the vapor deposition equipment is the equipment of a vacuum company in Shencheng, not the equipment of the Modu Glove Box Company, if you want to modify it, you need to call the people from Shencheng Vacuum Company.

In order to solve this problem, there is a high probability that the structure of the glove box needs to be redesigned.

So, Xu Qiu, Wu Feifei, and Duan Yun got together to discuss.

Because Duan Yun is about to graduate, he has no intention of participating in too many laboratory constructions. He is mainly drawn by Wu Feifei and is responsible for issuing CAD drawings. No, but if you use CAD, it will look more professional.

Xu Qiu first suggested: "One solution is to add another evaporation glove box, that is, to make two "spin coating-evaporation" dual-connection modes."

Afterwards, Xu Qiu changed the subject: "However, the budget is tighter, and more than 40W is needed. Now the budget given by Mr. Wei is 20W."

"Well, the budget can't be too much, otherwise the pressure on Teacher Wei will be too great. Now several funds in our group are about to expire." Wu Feifei thought for a while and suggested:

"I think it's better to separate the evaporation and spin coating, and then we will buy a spin coating glove box of the same size. The only problem in this way is that the device may be exposed to oxygen for a short time during the transfer process, but it should not be a problem. Great, two-dimensional perovskites are quite stable now..."

In fact, oxygen leakage in the transfer device is also an old problem in Wei Xingsi's research group.

However, after testing in the simulation laboratory, Xu Qiu found that this problem has little impact on relatively stable devices such as ITIC, and the efficiency attenuation may be around 0.1%-0.3%.

Therefore, Xu Qiu didn't give much thought to this issue before.

After all, it is impossible to have a perfect experimental environment in reality. When optimizing conditions, we can only focus on the big and let go of the small.

That is to give priority to those conditions that have the greatest impact on device performance - the material and processing technology of the active layer.

For example, if evaporation is usually required, the petri dish with the spin-coated substrate is first covered with a lid, so that the interior of the petri dish has the residual nitrogen atmosphere in the glove box.

The Petri dish was then transferred to the transfer bay of the spin-coating glove box;

Next, quickly take out the culture dish with the substrate from the transfer chamber of the spin-coating glove box, transfer the culture dish to the transfer chamber of the evaporation glove box within ten seconds, and immediately evacuate.

In this way, as long as the speed is fast enough, the device can be kept out of the air as much as possible.

"I don't think there's anything wrong with your proposal, but it always feels like you've come back to the starting point after a detour." Xu Qiu said:

"With this design, it seems that there is no need to connect the glove boxes, and three separate glove boxes are enough."

Wu Feifei nodded: "Yes, there are three glove boxes, one for perovskite spin coating, one for organic spin coating, and one for evaporation, which is similar to the laboratory in Handan, except that there is an extra glove box .”

Although Wu Feifei's proposal is not unacceptable, Xu Qiu still wants to stick to the original idea of ​​rowing to see if there is any alternative.

Xu Qiu's brain was running fast, and suddenly he had an idea, and said, "I have an idea, we can add two glove boxes."

"Two glove boxes?" Wu Feifei asked suspiciously, "But our budget is only 20W, so we can't buy two."

Xu Qiu explained: "The standard glove box is indeed 18W-20W, but if we ask their glove box company to make the smallest box... I checked, the price can be as low as 12W, so that the two boxes add up. It’s 24W, not too much over budget.”

Wu Feifei nodded: "Be specific."

Xu Qiu continued: "My idea is to use the original spin-coating glove box as a place to store solvents and chemicals without participating in spin-coating, and then buy two new glove boxes separately, one for spin-coating organic systems and the other for spin-coating organic systems. One for spin-coated perovskite systems."

"Well..." Wu Feifei looked thoughtful: "This is indeed a good solution, which can avoid the influence of the solvent atmosphere on the spin coating operation to the greatest extent."

"Not only the direct cross-effect between organic and perovskite, but also the influence between organic and organic, and between perovskite and perovskite is eliminated. After all, even if they are both organic or perovskite, different systems The solvent used will also make a difference.”

"Moreover, the old spin-coating glove box has been used for many years, and the self-processing ability of organic solvents has also been greatly reduced. At the same time, there are a lot of solvents stored in it. Even if the device is not used, these solvents will evaporate, which is really not suitable for continued spin coating. Glove box."

"If we follow my method, we will still face the problem of who uses the new one and who uses the old spin-coated glove box. If we all use the new glove box now, this problem will not exist."

After finishing the analysis, Wu Feifei nodded and said, "I agree, Xu Qiu's method is indeed better."

"So... the result of your discussion is a three-unit glove box of 'spin coating-solvent storage-spin coating', and the evaporation glove box is placed separately." Duan Yun asked in a voice: "Are you sure? If you are sure, I will It’s time to draw a CAD drawing.”

Xu Qiu waved his hand and said, "Senior Brother Duan Yun, don't worry, we have to figure out if there is enough space in the laboratory at Jiangwan, and whether we can fit it in."

Duan Yun gave a "hmm" and began to calculate: "The placement of the glove box is mainly based on the length. The standard glove box is 1.6 meters. If the small box is 1.2 meters, the two transmission cabins in the middle are according Calculated at 40 centimeters, two more large cabins will be opened on the side, and each will be calculated at 60 centimeters, adding up to 6 meters."

Referring to the drawings, Duan Yun quickly came to a conclusion: "It can be put down, but the evaporation glove boxes here cannot be arranged in a straight line, but can only form a broken line shape, just like this, similar to a Capital 'τ'."

Xu Qiu also went over to take a look: "Fortunately, some space was reserved before to deal with emergencies. Otherwise, if the position was stuck before, you can't change it now... By the way, Wu Feifei, you have Anything to add?"

"There is also the matter of Qi." Wu Feifei said.

"Well, this is indeed a problem. I almost forgot that we now use a centralized gas supply for the laboratory at Jiangwan," Xu Qiu nodded and analyzed:

"Fortunately, we have reserved two gas path connections before. Now the glove box where the medicine is stored in the middle does not need a nitrogen gun, and the gas path is sufficient. Are there any other problems?"

Wu Feifei shook her head and said: "There should be no other problems, the main thing is the budget."

Xu Qiu spread his hands: "That's what Teacher Wei will have a headache for. We just have to come up with the best solution, and we still have to rely on the tutor to make money."

"That's how it is." Wu Feifei began to direct: "Brother Duan Yun, you draw the picture, Xu Qiu, you are in charge and talk to Teacher Wei later."

Xu Qiu and Duan Yun said in unison: "What about you, Wu Feifei?"

Wu Feifei was stunned: "Or, the little girl will sing a song for everyone?"

Xu Qiu and Duan Yun had black lines on their faces: "Excuse me..."

Wu Feifei is a famous "dead song in the laboratory". It is estimated that a million tuners would not be able to tune her back. They don't have the courage to listen to Wu Feifei sing a song.

Duan Yun was very efficient in his work and quickly provided CAD drawings.

Xu Qiu prepared the materials, went to 218, and reported the results to Wei Xingsi. He was quite satisfied with the plan.

Although limited by the laboratory's conditions, funding, and laboratory area, it cannot be compared with Gong Yuanjiang's, but it is still one of the best solutions under the current conditions.

Xu Qiu chose to "report the good news first, and then report the worries", and said to Wei Xingsi: "We have already discussed the design of the Jiangwan glove box."

"Considering that the glove box originally used for spin coating has been used for a long time, it is now planned to be used to store solvents, placed in the middle, and two relatively small glove boxes are placed on both sides for spin coating organic and calcium. Titanium devices."

"That is, a three-row glove box and a separate evaporation glove box."

"In this way, first of all, the atmosphere inside the two spin-coating glove boxes can be kept very good, and there is no pollution of the stored solvent to the glove box atmosphere."

"Secondly, because I bought a standard glove box and it is in stock, I only need to pull the current glove box over and splice it, and the construction period can be greatly shortened."

"However, if you buy two small glove boxes, each will cost 12W, and the sum will cost 24W, which is a little over budget."

"The previous plan was to buy one big one, but now you plan to buy two small ones?" Wei Xingsi looked at the blueprint, raised his eyebrows, then gritted his teeth and said, "Sounds reasonable...then buy it." , In terms of price, I will go to talk with Modu Glove Box Company to see if there is any discount."

Then, Wei Xingsi continued to order: "After I negotiate the price, you will meet with the engineer over there and finalize the details on the spot. Don't make it at that time, but it turns out that it can't be put in. In addition, we have to hurry up , because time is running out.

"Okay." Xu Qiu nodded.

Wei Xingsi worked relatively quickly. Not long after Xu Qiu left his office, he called Xu Qiu again and said that he had already negotiated with the glove box company:

"A total of 2 small cabinets. According to the current design drawing, the cost of the cabinet plus the cost of renovation, the initial quotation is 22W. If it is suitable, the technical details will be finalized on the spot and the contract will be signed. The meeting time is set for January 21st. That's this Friday."

For the glove box company, the transformation is not difficult, because the glove box is just a relatively well-sealed iron box, and the functional modules are all independently detachable. The main modifications are cutting, welding, Assemble.

In addition to the matter of the glove box, Xu Qiu and the others are also simultaneously discussing the relocation of the laboratory.

The moving company provided by the department was the same one that helped Zhang Jiang Lab last time, and the moving date was set on Sunday, the 23rd, which was a bit rushed in terms of time.

The 24th is going to be a holiday, and the 23rd is a last-ditch battle. If the relocation work is not smooth, it will affect the holiday.

But there is no way, because the laboratory relocation plan cannot be started until Xu Qiu's "Science" article is submitted.

Otherwise, if Xu Qiu needs to add some data, and the instrument cannot be used because of moving, he will be dumbfounded.

In addition, for articles of the grade of "Science", the review period is usually longer.

Now start to move, wait for the review comments to come back, if there are any experiments to be added, the laboratory at Jiangwan has most likely already been established, and moving late may delay things.

Everything in the previous group had to be compromised for Xu Qiu's "Science" article.

Now comes the price of paying the concessions.

PS: This chapter is short of a few hundred words to 6K, and I will make it up tomorrow.