Chapter 67: Revised text

　　 After returning to the laboratory, Chen Wanqing brought Xu Qiu to the electrochemical workstation and said:
　　"Next, I will teach you how to use an electrochemical workstation to test the conduction band and valence band energy levels of samples by cyclic voltammetry.
　　 Perovskite and other semiconductor materials, there is no energy level distribution in the middle of their energy level structure, which is called the band gap.
　　 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 band gap, that is, the energy difference between the bottom of the conduction band and the top of the valence band, is called the band gap.
　　 However, for organic semiconductor materials, the conduction band valence band is usually not mentioned, but the HOMO/LUMO energy level, which refers to the highest occupied molecular orbital energy level and the lowest unoccupied molecular orbital energy level, respectively.
　　 The two are called different, but they are similar in principle. "
　　 After listening to the principle introduction, Xu Qiu conducted experiments under the guidance of her senior sister.
　　 Cyclic voltammetry uses three electrodes, among 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 with sandpaper until it was bright, and then dropped a 10% mass fraction of perovskite solution on the gold electrode. After the solvent evaporates naturally, a sample film is obtained.
　　 Then, he prepared a dichloromethane solution of 0.1 mole per liter of tetrabutyl hexafluorophosphate as the electrolyte.
　　 Next, place the three electrodes on the holder, insert the electrolyte into the electrolyte, and then connect to the electrochemical workstation.
　　 Finally, open the operating software in the computer, set the parameters, and start running.
　　The electrochemical workstation will provide a direct current voltage, and linearly scan from -2.5 volts to 2.5 volts to obtain the current versus potential curve.
After 　　 looped around 5 times, Xu Qiu found that the curve shape obtained in the second and third time was similar, a bit like a pigeon, which can be regarded as the scanning result in a steady state.
　　 After the test, Xu Qiu processed the data:
　　 Take the starting point at which the current begins to rise at high potential and the starting point at which the current begins to return at low potential. 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 revised your article again and 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 later later." Chen Wanqing said:
　　" By the way, when he helps you change the article, you must respond to him in time when speaking to you, such as: ‘um, ok, got it, ok’.
　　 Otherwise, he will think that you are on a desertion, and will raise the volume to ask you until you reply to him. "
　　 "Well, okay, I got it, okay." Xu Qiu said seriously: "Is it like this?"
　　 "Almost." Chen Wanqing said.
　　 Xu Qiu copied the drafts, supporting information, pictures, and references of the articles in the computer to the USB flash drive.
　　 The two came to 218 and saw that Teacher Wei was swinging 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, I have already read it again."
　　 "Okay, I just have time right now, so I will help you take a look." Wei Xingsi pointed to the empty seat behind him and said:
　　 "You two move two chairs and sit here.
　　 By the way, was yesterday's salt soda delicious? "
　　 "It's okay," Xu Qiu said.
　　 Wei Xingsi opened the U disk folder and saw that the draft file name was still "Wiely_draft.docx", and said:
　　 "What journal do you plan to submit, do you have any ideas?"
　　 "I don't know." 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 publish.
　　 It is better to listen more, read more and less comment on the field you don’t know well.
　　 "The content of this article is relatively weak, and it is definitely not enough for AFM," Wei Xingsi considered for a moment and said:
　　 "Vote for Adv.Electron.Mater. How about it."
　　 "Well, yes." Xu Qiu said.
　　 After getting a reply, Mr. Wei renamed the draft of the article and supporting information files to "AELM_draft.docx" and "AELM_SI.docx" respectively.
　　 Then he double-clicked to open the draft file.
　　 Xu Qiu carefully observes Teacher Wei from behind.
　　 saw him open WORD and stopped on the first page, staring at the title for a long time, placing his hand next to the mouse, tapping the desktop with two fingers.
　　 "This title is okay, and you can use it as long as you can. Think about whether there is a better one. Use this if you really can't think of it."
"Ok."
　　 Then, Teacher Wei looked at the author of the paper.
　　 Xu Qiu first work, Chen Wanqing second work, he is the corresponding author.
　　 He didn't say anything, he just swiped the mouse wheel down and looked at the pictures and text.
　　 Because each of Xu Qiu's pictures was drawn according to the standards given by her senior sister, and also checked again, there was nothing wrong with the pictures themselves.
　　 is about formatting and other details. Teacher Wei pointed out several problems:
　　 One of the reasons is that the picture is slightly larger, and about one-sixth of the blank space appears under WORD.
　　 Teacher Wei reduced the picture by 10% after seeing it, and successfully merged it into the previous page, and the blank disappeared.
　　 "For this kind of place, be flexible~EbookFREE.me~ It’s ugly to leave such a large piece below."
"understood."
　　 Another place is at the end of a certain passage, only one word occupies a whole line.
　　 Teacher Wei found the sentence and deleted one of the adjectives, making the last word shrink to the previous line.
　　 Then, he corrected the same problem in two places and said:
　　 "For small places like this, 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 be bold the first time it appears, and there is no need to bold it afterwards. Please check if you have written it according to this rule."
　　 "The body text is twice the line spacing, and the legend part is 1 times the line spacing. You can see that there is a problem with the line spacing of your legend."
　　 "This is, there are not a few representations in total, no subtitles are needed, all subtitles are deleted directly."
　　 "In this J-V characteristic curve, J and V should be italicized respectively."
　　 "This abbreviation can be abbreviated, but it must be defined when it first appears, and the definition in the abstract is not counted, and it must be redefined in the text."
　　……
　　 Wei Xingsi only picked out a bunch of minor faults at a glance.
　　 He sighed and said earnestly:
　　 "Chen Wanqing, you have to be careful when you look at it, and be strict with yourself, you know."
　　 Xu Qiu and Chen Wanqing looked at each other, both silently.
　　 Xu Qiu felt a little sorry for the senior sister, and made an apologetic expression.
　　 Chen Wanqing waved her hand, saying it was okay.
　　 Fortunately, Teacher Wei only said one sentence and then continued: "Let me see the summary."