Chapter 102: Call from Teacher Wei

　　 Xu Qiu carefully recalled his scientific research journey these months.
　　In the early days, the main reason for his efforts to move forward was the novelty of the scientific research field and the system that fell from the sky.
　　 System releases tasks, guides him step by step to complete tasks, and slowly gets familiar with the entire process of scientific research.
　　 At the same time, the increase in proficiency and system points can also bring him immediate feedback, telling him:
　　 "Look, the level of experimentation has improved again today, and if you work hard, you will become stronger."
　　 Afterwards, the system's sense of existence was much lower.
　　 Xu Qiu's motivation for working hard in scientific research is more self-driven, because he has experienced the joy of scientific research:
　　 Explore an uncharted territory, encounter problems, solve problems, and constantly challenge myself.
　　 Of course, Xu Qiu is not a great saint, and it is inevitably mixed with some utilitarian considerations about personal future.
　　 Although doing scientific research is not like getting money from business, there is always a small goal of one hundred million.
　　 But being a top scientific researcher, he can also master a large number of social resources, and it is not limited to wealth.
　　 Money is also a social resource in nature, the simplest and most direct one.
　　……
　　 Tao Yan’s voice pulled Xu Qiu back to reality:
　　 "Are you really doing experiments in Zhangjiang these two days?" Tao Yan suspiciously asked.
　　 "Of course it is true, I am not you." Xu Qiu said:
　　 "Don't block me, I want to change clothes, and then go take a shower."
　　 Tao Yan pretended to sniff at Xu Qiu, and said disgustedly:
　　 "For the smell of your body, I believe you did an experiment in Zhang Jiang."
　　 Xu Qiu also smelled it herself, but didn't smell anything.
　　 He shook his head, threw the dirty clothes into the basin, and asked casually:
　　 "Tao Yan, why haven't you been out for waves lately? Why have you stayed in the bedroom?"
　　 "He, he is broken in love." Ren Bin immediately answered.
　　 "Really, a veteran of the love scene, can you still miss the horse?" Xu Qiu said.
　　 "Don't mention it, we broke up peacefully, she wants to study abroad." Tao Yan said.
　　 "I remember that was not a Chinese girl, did you go abroad to learn Chinese?" Xu Qiu said:
　　 "PhD in Chinese Department of Cambridge University?"
　　 "You..." Tao Yan was choked, and he said impatiently:
　　 "Why do you have so many questions, don't you want to take a bath, please wash away you."
　　 When Xu Qiu came back after taking a shower, he saw Tao Yan already lying on the bed, hiding himself in the quilt.
　　 also did not show his head, but there was a faint light on his quilt.
　　 Is this, autistic?
　　……
　　 The next day, Xu Qiu and Chen Wanqing came to Zhangjiang to continue the post-processing of the fourth batch of reactions.
　　 This time it was his turn to do Soxhlet extraction with chloroform.
　　 has only two reaction systems, which is relatively relaxed.
　　 Process the product, dry it, and weigh it.
　　 Xu Qiu’s P2FBT4T-2HD system yielded 60 mg of product with a yield close to 50%.
　　 And Chen Wanqing's PBDTBTTT-37 system, the yield is still about 60%, which is relatively stable.
　　 The time for the synthesis experiment this week was too tight. After the first and second batches of products were extracted with chloroform, there was no time to make devices to verify their photoelectric performance.
　　 is followed by the synthesis and post-processing of the third and fourth batches of products.
　　 Therefore, this time directly accumulated four batches of products in Zhang Jiang laboratory.
　　 In the evening, the two returned to Handan campus with four batches of products.
　　 Similar to the experiment progress last week, the solution is also prepared on Thursday night, and a batch of devices can be made on Friday.
　　 Xu Qiu prepared a total of six sets of solutions.
　　 There are three kinds of him, PBT4T, P2FBT4T-2BO and P2FBT4T-2HD.
　　 are numbered 1#, 2# and 3# respectively.
　　 There are also three kinds of seniors, PBDTBTTT-37, PBDTBTTT-11 and PBDTBTTT-73.
　　 are numbered 4#, 5# and 6# respectively.
　　The solvents are all chlorobenzene solvents, the acceptor materials are all PC[70]BM, the donor/acceptor ratio is 1:1, and the total concentration is 16 mg/ml.
　　……
　　 Friday morning.
　　 Chen Wanqing did the preparations for cleaning the substrate and spin-coating the zinc oxide transfer layer, and prepared 24 substrates.
　　 At the same time, she split the three sets of solutions that Xu Qiu helped her to prepare yesterday into six sets of solutions, three of which were added with 1% volume fraction of solvent additives, and the other three were not added.
　　 The three groups with additives are numbered 7#, 8# and 9#.
　　 Xu Qiu did not intend to add solvent additives, because the solvent additives were added to the 1# system before, but the performance of the device was reduced. Maybe this system is not suitable for adding additives.
　　 In the afternoon, Xu Qiu spin-coated the effective layer. The two systems each used 12 substrates.
　　 vapor deposition, test.
　　 As a result, 1# has the highest efficiency of 6.12%, 2# has the highest efficiency of only 3.06%, and 3# has reached 6.97%.
　　 This shows that the direct introduction of two fluorine atoms without changing the branches, the photoelectric performance is inferior to the reference system without fluorine atoms, but if the length of the branches is increased, the performance will be significantly improved.
　　 is now a unilateral upward trend. If the branch chain length is further increased, the efficiency may increase further.
　　 The system of Xuejie, 7# has the highest efficiency, reaching 8.24%.
　　 In terms of efficiency alone, both of them have entered the threshold of SCI Zone II.
　　 However, Chen Wanqing's system potential is exhausted, and Xu Qiu still has the opportunity to improve further.
　　 Seeing the results of the experiment, she smiled on her face and said happily:
　　 "Achieved 8%, this week's hard work was not in vain."
　　 "Yes, it's really tiring to work together, but it's a sense of accomplishment to get results." Xu Qiu said:
　　 "Senior sister, if she can post an article in District 2 in her job, she will have three articles in District 2 in her hand."
　　 "Hey, it's one step closer to graduation," Chen Wanqing said:
　　 "But those two articles have not been officially published yet~EbookFREE.me~ From the time point of view, the opinions of the earliest one should come back soon. I hope that there will not be any problems."
　　 Xu Qiu also figured it out in his mind, and his opinion on the first article should be coming back soon.
　　 It has been a month since he returned to school before he knew it.
　　 I spend most of the time in the laboratory, and I have a fulfilling life every day.
　　……
　　 Sunday afternoon, Caiyi 216.
　　 "Sister, are you still making devices today?" Xu Qiu said.
　　 "Make another batch, my system will use these three materials to compare their performance," Chen Wanqing said:
　　 "Today, let's see if we can improve the efficiency. If we can achieve 9%, it will be more stable, and if it is 10%, it will be even better."
　　 Xu Qiu nodded, and then asked: "Wu Feifei, are you not making devices today?"
　　 "Let's do it, I made three batches when you went to synthesize a few days ago, this week's data is enough." Wu Feifei said.
　　 After getting the answer, Xu Qiu began to figure out how to control the experimental conditions today.
　　 can change your mind, the current 3# material is probably not the best material under this system, and the painstaking optimization seems to be of little significance.
　　 At this moment, the sound of Teacher Wei's leather shoes came from the door.
　　 After he came in, he looked around and found that all his students had arrived, so he gestured to Xu Qiu and Chen Wanqing:
　　 "You two, come with me."
　　 Teacher Wei walked in front, and the two followed behind. They were silent with each other, making eye contact:
　　 "Guess what Teacher Wei asked us for?"
　　 "I don't know, do you know?"
　　 "What a coincidence, I don't know."