I Have a Research Support System

After returning to the laboratory, Chen Wanqing brought Xu Qiu to the electrochemical workstation and said:

Next, I will teach you to use the electrochemical workstation to test the conduction band and valence band energy levels of the sample by cyclic voltammetry.

For semiconductor materials such as perovskite, there is a section in the middle of their energy level structure that has no energy level distribution, which is called a forbidden band.

Above the forbidden band is the conduction band, where the main carriers are free electrons, and below the forbidden band is the valence band, where the main carriers are holes.

The width of the forbidden band, that is, the energy difference between the bottom of the conduction band and the top of the valence band, is called the forbidden band width.

However, for organic semiconductor materials, the conduction band and valence band are usually not mentioned, but the HOMO/LUMO energy levels, which refer to the highest occupied molecular orbital energy level and the lowest unoccupied molecular orbital energy level, respectively.

The names of the two are different, but they are similar in principle.

After listening to the principle introduction, Xu Qiu conducted the experiment under the guidance of his senior sister.

Cyclic voltammetry uses three electrodes, of which the gold electrode is the working electrode, the silver/silver chloride is the reference electrode, and the platinum electrode is the counter electrode.

He first polished the surface of the gold working electrode until it was bright with sandpaper, and then dropped a 10% perovskite solution on the gold electrode. After the solvent evaporated naturally, a sample film was obtained.

Then, he prepared a dichloromethane solution of 0.1 mol per liter of tetrabutylammonium hexafluorophosphate as the electrolyte.

Next, put the three electrodes on the stand, insert them into the electrolyte, and connect them to the electrochemical workstation.

Finally, open the operating software in the computer, set the parameters, and start running.

The electrochemical workstation will provide a DC voltage, and perform a linear scan from -2.5 volts to 2.5 volts to obtain a curve of current versus potential.

After looping for about 5 times, Xu Qiu found that the shape of the curve obtained in the second and third times was similar, a bit like a pigeon, which can be considered as the scanning result in a steady state.

After the test, Xu Qiu performed data processing:

Take the starting point where the current starts to rise when the current is at a high potential, and the starting point where the current starts to return when the current is at a low potential, and after conversion, the LUMO and HOMO energy levels can be obtained respectively.

After the test, Chen Wanqing found him and said:

Xu Qiu, I have already revised your article, and I can show it to Teacher Wei.

Thank you senior sister, do you want to go there together? Xu Qiu said.

Let's go together, I guess even if I don't go, he will call me over later. Chen Wanqing said:

By the way, when he helps you revise the article, when he talks to you, you must respond to him in time, such as: 'Well, okay, I got it, okay'.

Otherwise, he will think you are deserting and will raise his voice and ask you until you reply him.

Well, okay, I see, okay. Xu Qiu said seriously, Is it like this?

Almost. Chen Wanqing said.

Xu Qiu copied the draft of the article, supporting information, pictures, and references from the computer to the USB flash drive.

When the two came to 218, they saw Mr. Wei shaking his head rhythmically, seeming to be moving his cervical spine.

What's the matter? Teacher Wei said.

Xu Qiu handed him the USB flash drive and said:

This is my article, senior sister has already read it.

Okay, I happen to be free right now, so I'll take a look for you. Wei Xingsi pointed to the empty seat behind him and said:

Both of you move two chairs and sit here.

By the way, is the salt soda good yesterday?

It's okay. Xu Qiu said.

Wei Xingsi opened the USB disk folder, saw that the file name of the draft was still Wiely_draft.docx, and said:

What journal do you plan to submit to, do you have any ideas?

I don't know either. Xu Qiu said.

He has not published an article before, and the accumulation of literature reading is still not enough, so he does not have much experience in judging what kind of journal a job can be published in.

For areas that you are not familiar with, it is better to listen more, read more and express less opinions.

The content of this article is relatively weak, and AFM's words will definitely not reach it, Wei Xingsi thought for a moment, then said:

Vote for Adv. Electron. Mater. How about it?

Yes, yes. Xu Qiu said.

After receiving the reply, Teacher Wei renamed the draft article and the supporting information file as AELM_draft.docx and AELM_SI.docx respectively.

Then he double-clicks to open the draft file.

Xu Qiu watched Teacher Wei carefully from behind.

After opening Word, he stopped at the first page, stared at the title for a long time, put his hand next to the mouse, and tapped the desktop with two fingers.

This title is not bad. If you can use it, you can think about whether there is a better one. If you really can't think of it, use this.

OK.

Then, Teacher Wei looked at the author of the paper.

The first is Xu Qiu, the second is Chen Wanqing, and he is the corresponding author.

He didn't say anything, and just slid down the mouse wheel to scroll through the pictures and text.

Because each of Xu Qiu's pictures was drawn according to the standards given by the senior sister, and he also checked it again, so there was nothing wrong with the pictures themselves.

However, Mr. Wei pointed out several problems about the details such as format and typesetting:

One of them is that because the picture is slightly larger, there is about one-sixth of the blank space below the WORD.

After Mr. Wei saw it, he reduced the picture by 10%, successfully merged it into the previous page, and the blank space disappeared.

This kind of place needs to be more flexible. It's so ugly to leave such a big piece underneath.

knew.

Another is at the end of a paragraph where only one word takes up an entire line.

Teacher Wei found that sentence, deleted one of the adjectives, and shrank the last word to the previous line.

Then, he changed two of the same questions one after another, saying:

In a small place like this, you should also pay attention, try not to leave one or two words in a line.

OK.

...

The word Figure, I remember that Wiely's format is to bold the first time it appears, and not to bold it afterward. You can check whether it is written according to this rule.

The main text is double-spaced, and the legend part is double-spaced. You can see that there is a problem with the line-spacing of your legend.

This is Communication, and there are not many signs in total. There is no need for subtitles, and the subtitles are all deleted.

This J-V characteristic curve, J and V should be italicized respectively.

For this abbreviation problem, you can abbreviate it if you want, but it must be defined at the earliest appearance, and what has been defined in the abstract is not counted, and must be redefined in the text.

...

Wei Xingsi only took a cursory look, and picked out a bunch of small problems.

He sighed and said earnestly:

Chen Wanqing, you have to be more careful when you look at it, and you have to be strict with yourself, you know.

Xu Qiu and Chen Wanqing looked at each other in silence.

Xu Qiu felt a little sorry for senior sister, and made an apologetic expression.

Chen Wanqing waved her hand, indicating that it's okay.

Fortunately, Teacher Wei only said one sentence, and then continued: Let me take a look at the summary.