I Have a Research Support System

Although there was a small episode, the experiment still had to continue.

Xu Qiu tried the other three solutions again.

After using three syringes and three filters, he finally came to a conclusion:

None of the four 2# and 4# solutions can be used.

"What should I do?" Chen Wanqing was a little anxious:

"Do you want to add some solvent and lower the concentration of the solution?"

"I think it's a bit difficult. In the second batch of materials, there should be some substances with extremely low solubility. Even if the concentration is lowered, it may not be able to dissolve." Xu Qiu said:

"Besides, the concentration of the solution we prepared is not too high. If it is further diluted, the coated film will be too thin."

Although not very hopeful, Xu Qiu still added one volume of solvent to each solution of 2# and 4# to dilute them to half the original concentration.

In fact, Xu Qiu has a solution to the problem of solubility, but he still needs to experiment in the simulation laboratory to find out.

"First make the devices of 1# and 3# solutions, and see how it works." Xu Qiu said.

Chen Wanqing didn't have anything to do, so she just nodded.

Only 8 substrates were used before, and 16 substrates remained.

Xu Qiu changed the speed, added 2000 and 4000 rpm, and other conditions remained the same, and used up all the substrates.

...

Evaporation, testing.

After testing all 24 chips, the highest efficiency of Xu Qiu's system is 4.13%, and that of Chen Wanqing's is 5.25%.

After getting the result, Chen Wanqing was much happier and said:

"It's much better than expected. I thought it could only be 1% or 2% efficient."

"At least it shows that the general direction is correct," Xu Qiu said:

"By the way, Senior Sister, your efficiency is 1% higher than mine."

"The efficiency of different systems cannot be directly compared," Chen Wanqing said:

"We do different types of work. It seems that my efficiency is higher, but in fact it is not as good as yours.

Because my ternary system is based on other people's work, it is normal to be able to do high. After all, the efficiency of their binary system can reach more than 10%.

If I take an article as an example, I want to post an article about the second district, and the device efficiency must be at least about 8%.

If it can achieve 10%, it can almost be sent to the first district.

It's almost impossible to go any further.

And your system is a new system, with an efficiency of about 6%, you can publish an article in the second district.

If the efficiency can reach 8%, it is almost enough to reach the threshold of the first district.

If you achieve 10%, you will be able to publish very good journals, such as AM and EES, the top journals in materials science, or Nature Communications, a small journal of Nature. "

"Then what if you want to publish the main issue of Nature?" Xu Qiu said.

"If you want to publish this kind of top journal, you must make a major breakthrough." Chen Wanqing said:

"The current world record for the efficiency of organic photovoltaic systems is 12%, which has been maintained for several years.

If the efficiency of your new material can reach 14% or 15%, it is estimated that it is still possible to publish the main journal.

But it is more likely to be published in its major sub-journals, such as "Nature Optics" and so on. "

"It's so difficult to post an article on Nature," Xu Qiu said.

"Of course, CNS is the ultimate pursuit of scientific researchers all over the world." Chen Wanqing said:

"If a student produces an article in "Nature", it is enough for him to graduate with a Ph.D., and it will definitely be in the news.

For experimental science such as materials, publishing such a top journal still requires a certain amount of accumulation and a lot of preliminary work, and few unknown people publish "Nature".

At least I have heard of you in this field, read his articles, and are generally industry leaders.

Unless your discovery is earth-shattering, you still need to be recognized by the majority of your peers to deserve your name. "

"Requiring preliminary work, isn't that a disguised form of encouraging papers to be filled?" Xu Qiu said.

"So we have to look at the phenomenon of flooding papers dialectically," Chen Wanqing said:

"One article, just a few pages, certainly cannot explain all the issues clearly. At this time, it is a better choice to split it into several articles and publish it.

For example, a scientific researcher has achieved a major research result.

He published the main conclusions in "Nature", and some scraps and preliminary work were published in journals such as AM and EES.

After seeing his work published in Nature, other researchers can also refer to his articles in other journals if they are interested.

Learning the research ideas of the big guys may even help your own scientific research. "

"With this kind of routine, it's no wonder that some people can publish dozens of articles in two or three years." Xu Qiu said.

"That's right, in the field of scientific research, the winner takes all," Chen Wanqing said:

"For ordinary researchers, articles are published one by one, but for big guys, articles are published one by one.

Therefore, when the number of researcher's articles reaches a certain level, the number of articles is not so important. It is more about his representative works, citations of papers, or the number of high-quality articles.

Usually, the H factor can be used to judge the scientific research level of a researcher. For example, if the H factor is 10, it means that he has at least 10 articles that have been cited more than 10 times. "

H factor Xu Qiu had heard of it before, and he asked curiously:

"What is Mr. Wei's H factor?"

"He, it seems to be 25. It's not too low. It's mainly due to his work in the United States," Chen Wanqing said:

"He is almost 40 years old now, and he is a young talent. If he wants to take a step closer, he must rely on his students before he is 45 years old to be rated as a young talent or even a Yangtze River."

"Anyway, I'm an idiot." Chen Wanqing smiled self-deprecatingly:

"Let's not talk about this, let's wait until Sunday to make another batch of devices, adjust the experimental conditions, see if the performance can be improved, and then study the next experimental plan."

...

After finishing the experiment, Xu Qiu returned to the dormitory and entered the simulation laboratory.

The way to solve the solubility problem, he has already thought of, is to use chloroform solvent to perform Soxhlet extraction of the product.

The methanol, acetone, and n-hexane solvents used in the pre- and post-treatments are used for Soxhlet extraction to remove small molecular impurities in the product, so the extract is waste liquid.

However, extraction with chloroform is different. The polymer material is dissolved and extracted into the Erlenmeyer flask below, so the extract is the part to be retained.

What is discarded instead is the filter paper in the extraction tube, which contains substances that cannot be extracted, including high molecular weight polymers and insolubles from side reactions, such as nonlinear polymer molecules.

There are still three previous reaction devices in the fume hood, which are still in operation.

Xu Qiu set up four sets of Soxhlet extraction devices beside him, and began to extract, twice as fast.