Chapter 186: New beginning

"I have a scientific research support system ( to find the latest chapter!
After New Year's Day, the days have returned to plain again.
There is still more than a month before the next holiday, which is the Spring Festival.
During this period, Xu Qiu's main task was to write articles, his secondary task was to deal with two exams, and his side task was to instruct students to write articles.
For the course of the open-book exam, "Medical Polymer Materials", he began to review two days in advance, made a manual catalog of the courseware PPT, and then printed the courseware PPT together with the catalog.
The catalog mainly includes keywords and the corresponding PPT page numbers. When answering the exam, scan the key words of the stem and compare the catalog to quickly find the location of the corresponding knowledge points on the courseware.
Most open-book exams only allow paper-based materials to be carried. Therefore, every exam week, the business of the major print shops in the school is very hot, and sometimes the line takes ten minutes or half an hour.
However, the school printing is really cheap, one-sided A4 cents per die, double-sided A4 cents per cent, large quantities can also be discounted 20%, if you print in an outside print shop, many of them are printed one by one.
Speaking of fantasy, Xu Qiu listened to the senior sister who said that graduate students have a course called "Liquid Crystal Materials", which is also an open-book exam, but can bring a laptop into the examination room.
It also allows students to check the electronic version of the courseware in the computer during the exam. It is said to reduce the burden of printing courseware for students. It is also green and environmentally friendly, but it cannot use the Internet search function.
In the exam classrooms, there is a campus wireless network. Whether students can search for answers directly on the Internet can only rely on the students' consciousness.
On another level, this is also an indication that the instructor doesn't care much about students' performance.
After all, at the postgraduate level, the level of course learning has minimal impact on scientific research. If you really want to be interested in a certain field, you can just search the corresponding literature directly.
Moreover, the general courseware has been made for many years and rarely updated, and it is difficult to keep up with the cutting-edge scientific research.
Xu Qiu reserved a week to review the course of "Nanomaterials".
Although he skipped a lot of courses this semester, it didn't take much effort to review. This course is somewhat similar to a liberal arts course, and it's done by memorizing it.
...
Time flew by, and in a blink of an eye it was January 18th, when all examination subjects ended.
The grades have not yet come out, but both courses are professional courses in the department. It should be no problem to guarantee B+A.
Xu Qiu believes that he is sure to compete with students of the same major.
This is mainly because when the sophomore diverted, most of the schoolmasters with a grade point of over 3.5 went to microelectronics, and not many went to the materials department.
The major of microelectronics is very polarized. There are many high grade points in the head, but the number of students with high grade points is definitely not many. Therefore, when the division is divided, the number of people who report to this major is not intended to be admitted, which ultimately leads to many grade points. In the bottom of the ranking, there are only students in their early 2s who can't find a place to go, and they have been transferred.
Many students with high grade points in the Department of Materials are not high in the initial stage, only about 3.2 and 3.3. Later, there will be more professional courses in the second and third years, and they are slowly catching up.
Xu Qiu is an outlier, and his results are in the T0 echelon from start to finish.
In addition to successfully completing the final exam, Xu Qiu's article on "The Impact of PCE11 System Side Chain Regulation on Device Performance" has also been written.
The novelty of this work is not lacking. After all, the four molecules differ only in side chains, and the structure is too similar to PCE11.
But the workload was very large, and a complete set of characterization tests were done for all three new molecules.
And the device efficiency is not low. In addition to the 11% efficiency of the PCE11 material, the efficiency of the other three systems has also reached 8%, 9% and 10% respectively. This is the optimization of Han Jiaying's new heating type glue machine. The results obtained.
The workload is large enough and the efficiency is not low, which makes up for the lack of new ideas to a certain extent.
Therefore, after discussing with Teacher Wei, Xu Qiu bit his teeth and voted for AEM, which is one of AM's main journals.
Although AEM is worse than AM, it is also a very good SCI journal.
As for whether this work can be successful, it depends on how the editor and reviewers view it.
Xu Qiu didn't think too much, anyway, the worst result was just to change and continue to vote.
Several of his articles have been published, and AM has posted them. Now that he is posting an ordinary article, it is difficult to cause too much fluctuation in his heart.
After this article is cast, it also means that the research on the PCE11 series of polymer donor materials has temporarily come to an end.
Xu Qiu will formally move towards a new field, the research of non-fullerene acceptor materials.
The first task is to complete the summary plan.
On the market, most of the review articles in the field of organic photovoltaics are about polymer donor materials. In the past two years in the field of non-fullerenes, no very comprehensive review articles have been written.
This phenomenon naturally has objective reasons.
Most researchers like to chase hot spots. Compared with the research of donor materials, non-fullerene acceptor materials are less likely to produce results~EbookFREE.me~ so there is less published work and fewer review articles.
After all, review articles in unpopular areas are more likely to be rejected by editors.
Of course, these are not things Xu Qiu considered. His original intention of writing a review was mainly to serve himself and let himself see this field clearly. The second is to post articles. It is best to get an article in one area. .
Before writing a review plan, you must first read most of the articles in this field in recent years, at least covering more than 80% to 90% of the literature in the first and second districts, preferably complete coverage.
Otherwise, if the corresponding author happens to be the reviewer of the missing article, the professionalism of the article will definitely be questioned.
For non-fullerene related documents, Teacher Wei has sorted out WORD documents once, Chen Wanqing has also done related PPT, and Xu Qiu also undertook a certain PPT update work.
With these two documents, you can save a lot of time.
After spending a few days, Xu Qiu summarized the non-fullerene materials:
One is the derivative of perylene diimide PDI, which is one of Wei's main research directions before returning to China. It can be regarded as his sentiment system.
One is the A-D-A type of small molecules, where A represents an electron-withdrawing unit, and D represents an electron-donating unit. Some are similar to the D and A units in the D-A copolymer of the binary donor material, but the unit structure is slightly different.
The A unit here is mostly a benzene ring or a five-membered thiophene ring with an electron withdrawing group. The electron withdrawing group usually includes a cyano group or a fluorine atom. The D unit is usually a large fused ring composed of multiple aromatic rings. Conjugated structure.
There is another category of polymer receptor molecules, the N2200 series.
These three categories are the main systems, and there are some other scattered and unsystematic ones, and Xu Qiu classifies them all into other categories.