I Have a Research Support System

Material one 216.

Han Jiaying and Chen Wanqing went to Zhangjiang, only Wu Feifei, Duan Yun, Tian Qing and the newcomer Sun Wo were in the office.

After more than a week, Sun Wo has also integrated into the research group. His posture is very low, and everyone he sees is called senior brother and senior sister, and even Han Jiaying is called senior sister.

Sun Wo’s family is a native of Shanghai, and they live not far from the school. Because they came to Mr. Wei’s joint training, there is no dormitory. They ride bicycles to and from school and home every day. About half an hour.

One of his hobbies is stock trading. It is said that he entered the stock market with 10,000 yuan four years ago, and now he still has 10,000,000,200. The master of 90% of the shareholders.

Another hobby, or specialty, is that he passed the neon language N1 exam. It is said that he learned neon language angrily because he couldn't wait for the localization of the drama and eating raw meat was too painful.

Sun Wo was arranged by Mr. Wei to make perovskite for Wu Feifei, so Xu Qiu didn't have much interaction with him.

Xu Qiu's task today is mainly to debug the TRPL instrument, but now that Qiu Heming has not come over, he is doing his own experiment and preparing some samples along the way.

The sample preparation requirements this time are not as high as those at Sioux City University. The sample size is any scale between 1 cm by 1 cm and 5 cm by 5 cm.

Xu Qiu used a glass cutter to divide a rectangular glass slide into three equal parts according to his usual habits, and obtained a square glass slide with a side length of about 2.5 cm as the substrate.

As for the selection of samples, he selected two standard samples, P3HT and PCE10, as well as his own PCE11 series, and the 3D-PDI series he just got.

In addition to organic samples, Teacher Wei also asked Wu Feifei to prepare some perovskite samples.

Although perovskite photovoltaics is still an emerging field at present, there are not many research groups using TRPL instruments for characterization, but this does not mean that research in this area is not important, but researchers are still in the efficiency sprint stage for the time being.

If you can take the lead in this area in advance, there is still the possibility of winning a big article.

This is also the reason why Mr. Wei quickly made up his mind to purchase the instrument. Not only can it be used in the organic field, but also perovskite, including quantum dots, which fits well with the research direction of the research group.

...

At two o'clock in the afternoon, Xu Qiu and Tian Qing were summoned by Teacher Wei to his office.

There were two strange men in the room, sitting on the sofa where Mr. Wei entertained guests. In the middle was a mature middle-aged uncle, who looked quite capable, holding a disposable paper cup with hot tea in his hand. The other one is a young guy who looks like a coolie.

There are also two cardboard boxes on the ground, one of which is an ordinary tan cardboard box, and the other is more delicate, with the LOGO of "HORIBA" and the words "Transient Fluorescence Spectrometer" printed on it, which seems to be a TRPL instrument.

Wei Xingsi introduced the acquaintance of the two parties: "This is Dr. Qiu Heming," "These two are two of my students, Xu Qiu and Tian Qing."

"Hi there."

"Hello, Dr. Qiu."

Qiu Heming got up, took the initiative to extend his hands to Xu Qiu and Tian Qing, and shook them politely one by one, then said:

"Mr. Wei, let's start now. Where are the instruments going to be installed?"

"It's in the utility room on my side." Wei Xingsi waved his hand as a signal, taking a step ahead, and everyone followed behind him.

The utility room is not big, only a few square meters. There is a sink and an empty table in it. The table has obviously just been wiped clean and shiny.

Qiu Heming roughly estimated the area of ​​the table, nodded and said: "It's fine here, the space is enough, Xiao Liu, go and move the equipment over here."

"Okay." After receiving the order, Xiao Liu quickly opened the ordinary cardboard box, and a metal sample cabin painted with black paint was revealed. He picked up the sample cabin, entered the utility room, and carefully placed it in the On the table.

Then, he unpacked another carton in the same way, and placed four set-top box-like instruments next to the sample cabin.

Wei Xingsi only looked at it for a while, then returned to the desk, leaving Xu Qiu and Tian Qing to supervise the work.

Qiu Heming started to assemble the instrument.

Halfway through the installation, he suddenly stopped and said, "We need a computer for the test later."

Xu Qiu murmured to himself: ‘Selling instruments without a computer is such a scam. '

‘However, this seems to be an industry practice. The several computers in the laboratory were bought by Mr. Wei later. Because the price exceeds one thousand, they are considered fixed assets. In theory, they are owned by the state and they only have the right to use them. '

"Use mine first." Xu Qiu said helplessly, and Tian Qing beside her showed no sign of intending to act.

Wei Xingsi heard their conversation, and took the initiative to say, "I'll make do with it first, and I'll buy a new computer later."

Xu Qiu responded, and went back to 216 to fetch his laptop.

Fortunately, the battery of the laptop he is using now is not broken. There was a laptop with a battery life of only 5 seconds before.

When Xu Qiu returned to 218 again, Qiu Heming had already completed the installation of the instrument. Of course, he just connected the wires. Optical instruments and adjusting the optical path are the troublesome things.

Qiu Heming took out a USB flash drive from his pocket and inserted it into Xu Qiu's computer.

Two softwares were installed, one was testing software and the other was data analysis software, and a serial number was entered to activate the two softwares.

During the software installation process, Xu Qiu was observing the entire set of TRPL instruments in front of him.

In the middle of the sample cabin is the sample platform, which can be used for testing various samples. It can be used for clipping, directly loading cuvettes, and even a low-temperature device. This is the supplementary requirement proposed by Teacher Wei later.

For this reason, Qiu Heming and the others specially made two kinds of cover plates for the sample compartment, one is a solid square cover plate, and the other is a round cover plate with a center cut out, and the size is based on the cryogenic device in the laboratory. of.

The sample chamber is square with four sides, and each side has a round hole on which a laser or a signal detection device can be installed.

At present, only three units have been installed, two of which are lasers, which are picosecond lasers at 465 and 695 nanometers, respectively, and the other is a detector, which can detect optical signals in the visible and near-infrared ranges.

The optical paths of the two lasers are respectively perpendicular to the detectors. If they are not perpendicular, the lasers are directly connected to the detectors, and the detectors may be GG directly.

If necessary in the future, another detector can be installed to detect light signals in the far-infrared range.

The three devices on the sample cabin are connected to three of the four "set-top boxes" next to each other through finger-thick data lines, and there are switches for lasers and detectors on them.

These three "set-top boxes" are all connected to the last "set-top box", which is the main console.

The main console is connected with the computer, and the operation of the whole instrument is controlled through the computer software.

In addition to these main devices, in the sample chamber, two lenses are installed in front of the laser and the detector to focus the light path, and some slots are left for installing other optical components.

For example, placing "bandpass" elements that only allow light around a given wavelength to pass through in front of the laser's optical path can improve the purity of the laser.

As another example, the use of "high-pass"/"low-pass" elements that only allow light above/below a given wavelength to pass through can eliminate the mutual influence of fluorescence signals of multi-component systems.

In addition, there are ND light reduction filters used to reduce light intensity and so on.

Xu Qiu did not forget to copy Qiu Heming's skills. His proficiency in PL and TRPL is 30% of the fifth level and 20% of the fifth level respectively. It seems that he is an experienced old salesman.

Throughout the afternoon, Xu Qiu and Tian Qing were held back by Qiu Heming, and kept adjusting the instruments to test the organic and perovskite samples they had prepared.

After all, it is nearly 200,000 instruments, so you can't be careless.

The results show that the cryogenic device in the laboratory can be put in tightly;

All the optical components brought by Qiu Heming can be used normally;

After the cover plate on the sample compartment is closed, the sample compartment does not leak light;

The operating software and data processing software are easy to use, but the operating software only has a 30-day trial period, because the genuine authorization code is bound to the computer, and now Xu Qiu’s computer is only used temporarily. Qiu Heming said that the computer will be fixed later. , will provide genuine authorization code;

Of course, the most important thing is that the instrument data is reliable and repeatable.

The basis for this evaluation is the test results of the P3HT standard sample. The test results with this instrument are basically consistent with the results in the literature.

One advantage of a standard sample like P3HT that has been studied for a long time is that as long as you can think of a characterization method, there are basically more than one literature data for reference.

This is also the significance of the existence of standard samples.

At about five o'clock, the equipment was finally debugged.

Qiu Heming politely declined Mr. Wei's polite invitation to dinner, and left with his younger brother.

In the evening, Xu Qiu tested all the samples with the TRPL instrument, briefly processed the data, and then reported the results to Mr. Wei.

In terms of organic matter, no exaggerated conclusions have been drawn for the time being.

After all, the new system has only one 3D-PDI, and the test and data of individual components and blended films can only show that the fluorescence quenching efficiency after blending is not low.

The data of a single molecule is not very meaningful, and only the molecules with new optimized structures can be compared with each other.

Wu Feifei's perovskite data was processed by Tian Qing with her help. Her system of ammonium chloride and calcium chloride additives seems to have made some new discoveries.

But Xu Qiu didn't pay too much attention to it. He took the time to squat at the school bus stop for school girls like yesterday.

Then, the adultery between the two was discovered by the senior sister.