Chapter 268: Is everybody in this group so NB?
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I Have a Research Support System
- Plump leeks
- 2180 characters
- 2021-02-02 04:21:21
After the applause lasted for a few seconds, Teacher Wei raised his hand falsely, looked at the crowd, and continued:
"Wu Shengnan’s previous research field was'triphenylamine-based conjugated polymer photoluminescence materials\'. After joining our research group, she will simultaneously carry out the synthesis of perovskite quantum dot luminescent materials and organic conjugated polymerization Research on photo-fluorescent materials."
Afterwards, Wei Xingsi pointed to Wu Feifei and Xu Qiu and introduced to Wu Shengnan in turn: "This is Wu Feifei, who is mainly responsible for the perovskite field in the team. This is Xu Qiu, who is mainly engaged in the organic field. What problems will thereafter be in the laboratory? You can communicate with them."
Wu Shengnan had a clear understanding. Since Teacher Wei introduced these two people specially, it means that they are the mainstays in the group. So, she nodded to Wu Feifei and Xu Qiu respectively. After carefully observing their appearance, Wu Shengnan was slightly surprised. Both of them looked so young, but she didn't show it.
Wei Xingsi went to the coffee table and poured a cup of tea, held it back to the desk and sat down, and said to everyone, "Let’s start a meeting."
Wu Feifei first reported: "Last week I tried the preparation of two BA two-dimensional perovskite materials. The n-BA system completely repeated the conditions in the literature. The device efficiency was 8.3%, slightly lower than the 12.4% in the literature. The efficiency of the BA system can reach up to 4.6%. In addition, it can be seen from the JV curve that the hysteresis is not obvious in our two two-dimensional perovskite systems."
The so-called hysteresis phenomenon refers to the process of testing the JV characteristic curve of the perovskite solar cell device, when the forward scan is continuously alternated, that is, the applied bias voltage changes linearly from negative to positive, and the reverse scan, that is, the applied bias When linearly changing from a positive value to a negative value, the inconsistency of the shapes of the two curves is mainly caused by non-radiative recombination and ion migration in the perovskite active layer film, which will affect the reliability of device performance evaluation and reduce testing. The speed of the device.
This phenomenon is not obvious in the field of organic photovoltaics, so Xu Qiu and others do not usually have a headache.
"Not bad." Wei Xingsi simply praised. Although Feifei Wu has not fully reproduced the results in the literature, the efficiency is 8.3%, indicating that the battery devices can work normally, and the rest can be optimized slowly.
Wei Xingsi looked at the performance data on the projection screen for a while and asked, "What are your plans for the next experiment?"
"Optimized for the preparation of the effective layer solution," Wu Feifei turned the PPT forward one page, and then pointed the laser pointer to the effective layer solution formula, saying: "The traditional three-dimensional MAPbI3'one-step method' solution preparation method is Lead iodide (mix directly according to the ratio, and then dissolve it with DMF solvent, there is no room for operation."
"However, volatile hydroiodic acid is used in the two-dimensional perovskite solution, and part of it will be lost during the preparation process, so it is necessary to find the appropriate amount of hydroiodic acid."
"On the other hand, amine reagents such as n-butylamine or isobutylamine are newly added to form the organic spacer layer. If the amount of amine reagents added is relatively large, the average two-dimensional perovskite crystals obtained The number of layers will decrease the value of n. Conversely, when the amount of amine reagents added is smaller, the value of n will increase. This aspect should also be adjusted to find the range of n value with the best photoelectric performance."
"Well, overall I agree with your ideas," Wei Xingsi nodded, and then changed the subject: "However, in addition to the optimization of the effective layer solution, the device structure can also refer to the article "Nature". I remember that they used a substrate. , We can also give it a try. C-60 can be vapor-deposited, and FTO (fluorine-doped tin dioxide conductive glass) can be etched manually."
Wei Xingsi paused, and said to Xu Qiu: "Do you remember the experimental process of etching the flexible ITO substrate."
"Remember." Xu Qiu replied, but he murmured in his heart, "Hey, as the skills he masters become more and more, it becomes easier to be called in the group meeting. You must concentrate and you must not make a short run. You can listen to the content of perovskite not so seriously, and it won't work now. ’
After spit out, Xu Qiu sat on the bench, recalling and telling:
"The etchant is 2M dilute hydrochloric acid and zinc powder. What I did at the time was to first paste the ITO pattern with 3M tape, then throw it into a disposable PE cup containing hydrochloric acid and zinc powder, and etch for about 30 seconds. The effect is okay. If you change to an FTO substrate, the conditions may change, and you can use wax sealing instead of 3M tape to get a more accurate pattern area."
"Okay," Wei Xingsi nodded, "Wu Feifei, please refer to it."
"Okay, I recorded them all." When Xu Qiu was talking just now, Feifei Wu was taking notes.
"Duan Yun, come on." Wei Xing thought.
After his last Small article was published, Duan Yun's experimental work has once again stalled, saying: "I tried silver nanowires last week, but the results were not good. Try again this week."
‘If it’s not good, it’s not good. What are you doing so rightly. Wei Xingsi was angry and laughed, but considering that Duan Yun had just contributed an article last week, there was no episode: "I see, Tian Qing, come here. How about Rev.'s review plan."
Haru Tian: "Last Tuesday and Thursday, Feng Shengdong and I discussed twice and determined the division of the literature [ ] review plan. Now more than half of it has been written, and it can be completed before the May Day holiday."
Hearing good news, Wei Xingsi's expression eased a lot, and he called again: "Sun Wo!"
Sun Wo shook his body, got up and said, "Last week, I was mainly writing a graduation project. By the way, I helped Senior Sister Wu Feifei prepare devices."
Wei Xingsi made a noncommittal "Oh" and continued to roll his name: "Chen Wanqing, how is your AM writing."
Chen Wanqing: "Still writing, it should be completed before the May Day holiday."
"Okay, after you finish writing, let Xu Qiu have a look at the checkpoint." Wei Xingsi nodded, turned his eyes to Xu Qiu, and said:
"Xu Qiu, the NC you submitted last week, "Nature Communications", I checked the backstage today, it has been reviewed by the editor and sent to the reviewers for review, how is this EES written now?"
"The rough draft has been written, and the repeatability data of the device is still missing." Xu Qiu replied.
Considering that the current maximum efficiency has been optimized to 9.15%, it is definitely impossible to break 10% in a short time. There is no need to delay it. Moreover, this week, the senior sister will submit an article and Tian Qing will also submit a review plan. It is better to help Teacher Wei relieve the pressure , Send the article out early, thinking of this, Xu Qiu added: "Vote on Wednesday."
However, Xu Qiu was a little puzzled. What happened to Teacher Wei today. He also deliberately read his full name, including Tian Qing’s previous review, Chen Wanqing’s AM work, and the EES he is writing now, and he has to name the journal. Tell it.
Until he saw Wu Shengnan next to him, he didn't realize that it turned out that Teacher Wei was showing off to the new members.
Xu Qiu instantly replenished the picture, and a strange stalk took a lollipop and said to a little loli: "Look at other people. As long as you work hard, the article will not be a problem."
At this time, Wu Shengnan's mouth was "O", and he said in his heart: "Is everyone in this group so NB?"
Her undergraduate degree is an ordinary one, master degree is 211, doctor degree is 985, the best article published before is an AFM, but it is still a review, with average gold content, there is also a JMCA, an ACSAMI, and the rest Both articles are three-zone articles.
The sub-journal of is slightly worse than AEM, but it is also a relatively good one.
In fact, with her achievements, more than half of the Ph.D students have already passed. No way, most of the postgraduates are actually salted fish.
She did not choose to go abroad to find a postdoc. On the one hand, her English level is average, and on the other hand, it is difficult to apply for postdoc postgraduates in the foreign big cow group. Many of them require her own project to come and join the post. "Money" is collected only when you come here, unless you are a very good person who can post AM or above articles casually, then naturally you are rushing to ask for it.
Relatively speaking, it is easier to study abroad for a Ph.D. The disadvantage is that you cannot apply for a scholarship, you need to pay yourself, and graduation is more difficult.
In addition, her field is still not very popular such as "photochromism", so it is even harder to find a postdoc from abroad.
Therefore, she finally decided to stay in the domestic magic city for development, so she looked for tutors in the materials and chemistry departments of several 985 universities such as the Magic City Jiaotong University, the Magic City Comprehensive University, and Tongji University. Wei Xingsi and other teachers contacted him and identified Teacher Wei.
The main reason for choosing Teacher Wei was that Wu Shengnan saw the real-time results updated by him. Not long after returning to China, the students published articles in high-quality journals such as ACSEL, and published more than 20 articles in total. The worst articles are in the second area, with unlimited potential.
Now she participated in the first group meeting, and heard that everyone in the group was in the big news. It was . Rev., NC, EES, and AM. The whole person was shocked.
Finally, Han Jiaying reported some experimental data from last week, mainly the characterization data of that EES article.
After the group meeting, Wei Xingsi ordered Wu Feifei to order lunch, and then left Wu Shengnan alone.
"How about it, the group will listen." Wei Xingsi said casually.
"Your students are very good." Wu Shengnan praised sincerely. After listening to a group meeting, she roughly understood the distribution of members in the group. Three are organic, two are perovskite, and one For the mechanism, one for thermoelectricity, its direction crosses organic and perovskite, but it is relatively independent.
Wei Xingsi followed her words and said: "Yes, and several potential stocks are very young. Feifei Wu is a master-doctoral fellow. She has just transferred to a PhD this year and is considered a first-year doctoral degree."
"What about Xu Qiu?" Wu Shengnan asked curiously.
"He, a senior undergraduate from this school, only graduated in September this year, and then went straight to the group." Mentioned Xu Qiu, Wei Xingsi couldn't help but feel better~EbookFREE.me~ With a smile on his face.
"Senior year?!" Wu Shengnan said in surprise: "Senior year is coming?"
Wei Xingsi explained with a smile: "That NC is Xu Qiu's first article, and the other EES is the same with the junior girl who reported last time, Han Jiaying, because Xu Qiu's article is well written, so he writes it, except In addition to these two articles, Xu Qiu has posted an AM and an AEM before, as well as two district two articles and a recent ACSEL review."
"Are the current undergraduates so strong?" Wu Shengnan said with emotion. She had browsed the academic achievements on the official website of Teacher Wei's research group before, but did not check the corresponding author of the article. Now it seems that her homework is still not enough. Ah, I didn't find Xu Qiu's thigh, and I determined the research field early.
At this time, she wanted to say to Wei Xingsi: "I regret it. I also want to do organic photovoltaics, not for publishing articles, but simply because I am full of love for the field of organic photovoltaics."
But then I think about it, I am a post-doc, and I have no choice but to see if I can hold my thigh in the future.
……
PS: One more chapter will be added after midnight on Monday. It will be counted as this week's addition. It should have paid off the 4,000-character addition of 100 monthly tickets and 2,000 recommended votes. If it is more, count you owed me.
At the end of the month, there will be a double monthly ticket event on 29-31. I personally understand that one vote counts for two, so the monthly ticket can be saved first and then [vote to me].