I Have a Research Support System

Xu Qiu thought about it carefully, it seems that there is no need to choose, both are available.

For the field of organic photovoltaics, if you want to publish an article, you need to go through a whole set of experimental procedures, including:

Material synthesis, optical properties, electrical properties, morphology characterization, molecular structure stacking, photoelectric properties, charge transport kinetics, etc.

And these experiments have a fixed time cost.

For example: it takes 1 time to test one sample, but it may only take 3.7 times to test ten samples.

Among them, the fixed time is 0.7 part time, and each sample is extra 0.3 part time.

Therefore, it is possible to save a lot of systems, and then systematically perform characterization experiments on them, which can save a lot of time.

For Xu Qiu, it is to focus on the two points of material synthesis and device preparation.

Based on the modification of PBT4T, a series of new materials have been developed to fully tap the potential of this system and see how much the highest efficiency can be achieved.

Then perform various characterizations of this series of materials in a unified manner, integrate all the experimental results together, and see if it can impact a large article, and then use leftover materials to post several small articles.

Of course, this time cannot be delayed for too long.

If it is delayed for too long, it may be preempted by other researchers.

After all, doing scientific research is a bit like the nautical and colonial era. Whoever first discovered the new continent and then planted a flag on it, this continent will be his.

…………

Sunday, material one 216.

With a serious look, Chen Wanqing sat at the table and planned the preparation conditions of today's battery devices.

Xu Qiu had already found a way to further improve the experiment, so it was very easy.

He pulled out the stool and sat next to her.

Chen Wanqing handed over the experiment notebook and said:

"Student, please help me to see how this condition is."

Xu Qiu took the notebook and looked at it.

It was found that the senior had temporarily given up on the second batch of samples and focused on the first batch.

The results of Friday's experiment showed that the performance of the device was better in chlorobenzene solvent, and this time she did not prepare a solution in chloroform solvent.

Her experimental operation is more ingenious:

First, a pure polymer was prepared with a chlorobenzene solution with a concentration of 9 mg/ml.

Under the condition of heating at 90 degrees Celsius, use a filter head to perform hot filtration, and then use a pipette to measure the filtered solution to obtain the volume.

Then assuming that the loss of polymer after filtration is 1 mg/mL, the concentration of the filtered solution becomes 8 mg/mL.

Based on the concentration and volume, calculate the mass of the polymer in the solution, and then calculate the mass of the acceptor that should be added based on the mass ratio of the donor to acceptor of 1:1.

Finally, the PC[70]BM receptor was added and stirred to dissolve, and the solution was prepared.

She didn't use the cheap PC[60]BM, it seems that because of the group meeting tomorrow, she intends to fight to the death and get some more beautiful data.

The notebook also lists specific experimental conditions, involving solvent additives, thermal annealing treatment, rotational speed, and so on.

In addition, she also thoughtfully prepared a solution for him.

"Sister came over to make the solution this morning? Or did you work overtime yesterday?" Xu Qiu asked.

"You discovered all of this. I came here yesterday to match it." Chen Wanqing said.

"I think the experimental conditions are okay, let's do it this afternoon." Xu Qiu nodded.

He thought for a while, and didn't immediately tell his senior sister the improvement plan he got through the simulation experiment, and there was no rush to talk about it after the batch of devices was finished.

Anyway, neither resynthesis of a batch of materials nor Soxhlet extraction with chloroform can be done today.

In the laboratory, Wu Feifei and Tian Qing were tinkering with CELIV's oscilloscope, while Duan Yun was building his equipment.

Xu Qiu and Chen Wanqing occupied the glove box and started experimenting.

…………

After eight o'clock in the evening, the device preparation and testing were completed.

The highest efficiency of Xuqiu 1# sample is 4.42%, and the highest efficiency of Chen Wanqing 3# sample is 5.87%.

Among them, in Chen Wanqing's system, thermal annealing has little effect on device performance, that is, it is not sensitive to thermal annealing, but the device performance is slightly improved with the addition of solvent additive DIO.

On the contrary, in Xu Qiu's system, thermal annealing can slightly improve the performance of the device, but the performance of the device drops sharply after adding the solvent additive DIO.

The highest efficiency of their device has improved compared to the test on Friday, which shows that the filtering operation of the senior sister has a certain effect.

But the performance is not as good as the result of Xu Qiu's simulation experiment, that is to say, the effect of Soxhlet extraction with chloroform is better than that of filtering the solution.

It seems that chloroform still cannot be avoided.

After receiving the experimental results, Chen Wanqing said with emotion:

"The field of organic photovoltaics is still difficult to do. If you want to make a breakthrough in research, you must spend a lot of time and synthesize materials yourself. The key synthesis is not necessarily easy to use.

Unlike the perovskite system, which are relatively simple small-molecule materials, you can simply place an order online and buy the corresponding medicine for the structure you want. After you buy it, pour it into a solvent and mix it to synthesize it. "

"Yes," Xu Qiu nodded in agreement, and said:

"We did a week's synthesis and worked hard to synthesize two batches of materials, but the effect was satisfactory, and further synthesis and improvement were needed, and Wu Feifei had already made several batches of devices.

However, there are pros and cons to everything. Raw materials are easier to buy and synthesize, so the threshold is lower, the pressure of competition is high, and the risk of results being published first by other researchers is relatively high. "

"I heard that her recent work on ammonium chloride additives seems to have made some progress. Now she is doing research on charge transport in Hetianqing. It is estimated that she will write another article in two months." Chen Wanqing said.

"Why, senior sister, are you envious?" Xu Qiu said.

"I can't talk about envy, it's all the result of my choice," Chen Wanqing said suddenly:

"By the way, do you know about blind boxes?"

"Blind box, I've heard of it." Xu Qiu was a little surprised, the senior sister's thinking is too fast, but she still replied:

"It usually contains the peripherals of animation, film and television works, or dolls designed by designers alone, because there is no label on the box, and only when you open it will you know what you have drawn."

"It just occurred to me that for students, the scientific research circle is not much different from smoking a blind box." Chen Wanqing said:

"The news from other people is inaccurate. Only by experiencing it yourself can you know the true state of this field."

"Information asymmetry, this should be normal in society," Xu Qiu said:

"People are profit-seeking, if you put all your interests on the surface, you will naturally choose what is beneficial to you.

But society is diverse, and there are always some people who have to carry the burden and choose a more difficult path.

For example, there was someone in my original class who had the same score in the college entrance examination as me, with a difference of 20 points to go to Qingbei University.

Later, he chose the orientation student in Qingbei, and I chose Shanghai Shanghai University.

I don't know if he will regret his choice after many years. "