Chapter 95: Both are available

　　 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 complete set of experimental procedures, including:
　　Material synthesis, optical properties, electrical properties, morphological characterization, molecular structure stacking, photoelectric properties, charge transport dynamics, etc.
　　 And these experiments have a fixed time cost.
　　For example, it takes 1 time to test one sample, and it may only take 3.7 time to test ten samples.
　　 Among them, the fixed time is 0.7 time, and each sample is an additional 0.3 time.
　　 Therefore, it is possible to save a lot of systems, and then perform characterization experiments on them systematically, which can save a lot of time.
　　 For Xu Qiu, it is to focus on the two points of material synthesis and device preparation.
　　 Modified based on PBT4T and developed a series of new materials to fully tap the potential of this system and see how much the highest efficiency can be achieved.
　　 Then unified the characterization of this series of materials, integrate all the experimental results, and see if it can impact a big article, and then use scraps to send out several small articles.
　　 Of course, this time can't be delayed too long.
　　If it drags for too long, it may be preempted by other researchers.
　　 After all, doing scientific research is a bit like the era of navigation and colonialism. Whoever discovers the new continent first, and then puts a flag on it, this continent belongs to.
　　…………
　　Sunday, Caiyi 216.
　　 Chen Wanqing looked serious, sitting at the table planning the preparation conditions for today's battery devices.
　　 Xu Qiu has found a way to further improve the experiment, so it is very easy.
　　 He pulled away the stool and sat next to her.
　　 Chen Wanqing handed over the experiment log and said:
　　 "Boy, you can help me see how this condition is."
　　 Xu Qiu took the logbook and looked at it.
　　 discovered that the senior sister had temporarily abandoned the second batch of samples and focused on the first batch.
　　Friday's experiment results showed that the performance of the device under the chlorobenzene solvent was better. This time, she did not prepare a chloroform solvent solution.
　　 Her experimental operation is also quite clever:
　　 was first equipped with a pure polymer solution with a concentration of 9 mg/ml in chlorobenzene.
　　 Under the condition of heating at 90 degrees Celsius, use the filter to perform hot filtration, and then use a pipette to measure the filtered solution to obtain the volume.
　　 Then assume that the polymer loss after filtration is 1 mg/ml, then the concentration of the filtered solution becomes 8 mg/ml.
　　According to 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 with a 1:1 donor-acceptor mass ratio.
　　 Finally, add PC[70] BM receptor, stir to dissolve it, and the solution is ready.
　　 She didn't use a cheap PC[60]BM. It seems that because of the group meeting tomorrow, she intends to fight back and get some pretty data.
　　 The notebook also lists specific experimental conditions, involving solvent additives, thermal annealing, speed, and so on.
　　 In addition, she thoughtfully helped him with a solution.
　　 "Senior sister came over this morning to prepare the solution? Or did you work overtime yesterday?" Xu Qiu asked.
　　 "You found all of this, I came to match it yesterday." Chen Wanqing said.
　　 "I think the experimental conditions are okay, so let's do this this afternoon." Xu Qiu nodded.
　　 He thought for a while, but didn't immediately tell the senior sister of the improvement plan he got through the simulation experiment, and it was no rush to wait for the batch of devices to finish.
　　 Anyway, neither re-synthesizing a batch of materials nor extracting them with chloroform Soxhlet can not be done today.
　　 In the laboratory, Wu Feifei and Tian Qing are tinkering with CELIV's oscilloscope, while Duan Yun is building his equipment.
　　 Xu Qiu and Chen Wanqing occupied the glove box and started the experiment.
　　…………
　　 After 8 o'clock in the evening, the device preparation and testing were completed.
　　许秋1# sample has the highest efficiency of 4.42%, and Chen Wanqing 3# sample has the highest efficiency of 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 has a slight improvement with the addition of solvent additives.
　　 On the contrary, in Xu Qiu's system, thermal annealing can slightly improve the performance of the device, but the device performance drops sharply after adding solvent additives.
　　 The highest efficiency of their device has improved a bit compared to the Friday test, which shows that the filtering operation of the school sister has a certain effect.
　　 But the performance is not as good as the results in the Xu Qiu simulation experiment, that is to say, the effect of Soxhlet extraction with chloroform is better than that of filtering solution.
　　 It seems that chloroform is still inevitable.
　　 After getting the experimental results, Chen Wanqing said with emotion:
　　 "The field of organic photovoltaics is still difficult to do. It takes a lot of time to make breakthroughs in research. Synthesizing materials by yourself is not necessarily easy to use.
　　Unlike the perovskite system, they are all relatively simple small molecule materials. For any structure you want, you can directly order the corresponding drugs online, and pour it into the solvent and mix it. "
　　 "Yes," Xu Qiu nodded in agreement and said:
　　"We did a week of synthesis, and worked hard to synthesize two batches of materials, but the effect was quite satisfactory, and further synthesis and improvement are needed. Feifei Wu has already made several batches of devices.
　　 But everything has advantages and disadvantages~EbookFREE.me~ The raw materials are better to buy, better to synthesize, the threshold is low, the competition pressure is high, and the risk of the results being published by other researchers is relatively high. "
　　 "I heard that her recent work on ammonium chloride additives seems to have progressed, and now she is doing research on charge transport in Hetianqing, and it is estimated that she will be able to write an 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 original choice," Chen Wanqing said suddenly:
　　 "By the way, do you know blind boxes?"
　　 "Blind box, I've heard of it," Xu Qiu was a little strange, the senior sister's thinking is too strong, but she still replied:
　　 "It usually contains the surroundings of animation, film and television works, or the dolls designed by the designer. Because there is no label on the box, you can only know what you got when you open it."
　　 "I just suddenly thought that for students, the scientific research circle is not much different from drawing blind boxes." Chen Wanqing said:
　　 "The information received from other people is inaccurate. Only when you have personally experienced it will you know the true state of this field."
　　 "Asymmetrical information, this should be the norm in society," Xu Qiu said a little bit:
　　"People are profit-seeking. If you put all your interests on the surface, you will naturally choose what is good for you.
　　 But society is diverse, and there are always some people who have to move forward with heavy burdens and choose a more difficult path.
　　 For example, someone in my original class had scores similar to mine on the college entrance examination, 20 points behind Qing Pei University.
　　 Later, he chose Qingbei's orientation student, and I chose Magic City University.
　　 don't know if he will regret his choice many years later. "