I Have a Research Support System

Xu Qiu rested for a while, ready to continue the experiment.

Sister, the four perovskite systems, wait for the tests of EQE, CELIV, and UV-VIS, shall we do them all again? Xu Qiu asked.

It's not necessary, Chen Wanqing said:

Because the main highlight of this article is your 4# sample, and the communication is sent, so other systems don't need to be too detailed.

Their data will also be placed in the supporting information at that time, and the text only needs to compare the similarities and differences between PEDOT and 4# samples.

Then besides what I just said, the representation methods I learned, what tests do I need to add? Xu Qiu said.

Chen Wanqing raised her head as if thinking, and while wrenching her fingers, said:

Device stability, test the photoelectric performance of the device once in a while, and see the attenuation of the photoelectric performance over time;

Repeat several batches of devices to see if the data is repeatable, and you can also try inverted structure devices;

Use cyclic voltammetry, CV, to test the conduction band and valence band energy levels of perovskite materials;

Use X-ray diffraction method, XRD, to test the crystallization properties of perovskite materials;

Finally, the thickness of the transport layer is tested with a scanning electron microscope, SEM.

That's about it, plus writing articles, and try to get it done within a month.

It sounds like there are quite a lot of tests that need to be supplemented, Xu Qiu said.

Let's work hard together. Chen Wanqing waved her small fist and said:

Fortunately, this article is equivalent to only two systems of 4# sample and standard sample, so the test should be relatively fast.

…………

two hours later.

Xu Qiu completed three tests, processed the data and drew them into pictures.

Senior sister, how is my article revised? Xu Qiu said.

Almost, Chen Wanqing said:

My junior's English is really good. I can't find faults in grammar and spelling. The main problem is in data analysis, which is not enough in some places.

However, when you have accumulated a certain amount of literature reading, you will naturally understand the main routines in this field, and this problem will be solved by then.

Okay, my basic characterization has been done, Xu Qiu said:

When will you teach me other means of representation?

CV can be tested with the electrochemical workstation in our laboratory, I will teach you tomorrow, Chen Wanqing said:

The other two are instruments on the public platform of the Materials Department. They need to be trained before they can be used alone. You must remember to sign up for the training at the beginning of this semester.

Let me take you to test this time. XRD needs to make an appointment, but SEM generally does not need to make an appointment, but if you want to test, you have to wait until Monday at least.

Okay, then I'll go back first, senior sister, don't stay too busy, you have to go to work tomorrow. Xu Qiu said.

Got it, bye.

Bye-Bye.

…………

Back in the dormitory, Xu Qiu entered the simulation laboratory.

For devices with positive structures, there is basically no room for further regulation.

This time, he mainly wants to verify whether the perovskite material can be used as an electron transport layer to replace zinc oxide in the inverted structure.

Spin coating, evaporation, testing.

Unfortunately, the result is not ideal, the highest efficiency is still 4# sample, the efficiency is only a little over 8%.

After finishing the experiment, it was already close to twelve o'clock, so I had to go to the corridor to take a shower again.

Xu Qiu found that since he entered the laboratory and started doing scientific research, the frequency of taking cold showers has increased significantly.

…………

Sunday afternoon.

Chen Wanqing took Xu Qiu to room 104 on the second floor of the material, and prepared to make an appointment for XRD.

This instrument is not reserved online, you need to make an appointment at the place where the instrument is located.

On the door of room 104, there is a paper appointment form, which is still brand new and has no handwriting.

The upper column is written from Monday to Friday, the left column is the specific time, such as 8:00-9:00, etc., and the others are blank spaces in the form.

Would you just fill in the time slot you want to make an appointment for? Xu Qiu said.

Yes, fill in your name, research group and contact information in the corresponding place, and the appointment is successful. Chen Wanqing said:

After other people see it and know that someone has made an appointment at this time, they will choose to make an appointment at another time.

Then why is it blank now? Is there no one to test during the summer vacation? Xu Qiu said.

Maybe it hasn't been long since it was posted. Usually, the next week's appointment list is posted every Saturday or Sunday, Chen Wanqing said:

There should be a reason for the summer vacation. XRD is usually quite popular, and basically the weekly testing time can be allocated.

But there is a bug in this form of appointment. What if I make an appointment and no one comes? Xu Qiu said.

The situation you mentioned has happened many times before. Later, the department stipulated that as long as you write your name on it, no matter whether you come to the test or not, you will be charged according to the length of the appointment, Chen Wanqing said:

However, XRD is relatively cheap. It is like 100 per hour for the internal test, 200 for the external department, and 400 for the external school.

Okay, how long should we make an appointment? Xu Qiu said.

If only one sample is tested, it may take less than ten minutes. Let's make an appointment for half an hour and test all four samples. Chen Wanqing said.

Is that about Monday morning?

Not on Monday morning, our group usually has a group meeting every Monday morning, Chen Wanqing said:

You haven't participated before, but now you can too. Make an appointment until 1:30 p.m. to 2 p.m. on Monday, and write my name.

After Xu Qiu filled out the appointment information on it, the two returned to the first floor of the materials.

They just passed the SEM equipment room on the first floor of the material.

There are relatively few people who take the SEM test. Generally, there is no need to make an appointment in advance. After the teacher in charge of the test goes to work on weekdays, they can go directly to the test. Chen Wanqing introduced on his own initiative.

Large instruments like XRD and SEM seem to be placed on the first floor. Xu Qiu said.

That's right, because large instruments are relatively heavy. Their weight is measured in tons, and their volume is also large. Without professional equipment, it is difficult to get them to the top. Chen Wanqing said:

In addition, the first floor and the second floor of materials are decades-old buildings, and the load-bearing is not good enough, so they are basically placed on the first floor.

I heard that the school plans to renovate a number of old buildings. Xu Qiu said.

This kind of old building renovation is useless, just repainting and pasting tiles can't change the essence of the old building. Chen Wanqing said:

Besides, this kind of thing, before the red-headed documents come down, it's all groundless. I don't know if the news will take several years to start.

That's right. I remembered that when I was in elementary school, the school said that it was going to rebuild the cement playground into a rubber track, but it was only renovated after I graduated. Xu Qiu said.

As for middle school, they said they were going to build a new canteen, and after I graduated, the canteen was also built.

It's similar to my experience. Anyway, good things are always reserved for future generations. Chen Wanqing smiled.