Chapter 303: 1 hand can be reserved, but it is not necessary

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At 8:50 in the morning, Handan campus went to the school bus point of Zhangjiang campus.
Xu Qiu, Han Jiaying and Chen Wanqing parted here, and walked to Xiangcai alone.
The senior sister and senior sister went to Zhangjiang to continue to synthesize, respectively, IEICS non-fullerene acceptor materials, and wide band gap donor materials for H4x and PBDB-T systems.
Xu Qiu reached Caiyi 216, the door was locked, and he was the first to arrive.
After a year of observation, Xu Qiu discovered a phenomenon:
Feifei Wu and Chen Wanqing sometimes work overtime in the office at night until 12 in the morning, but they rarely come to the office early, unless there is an early test experiment.
That is, "you can leave late, but will not arrive early", which is quite interesting.
Xu Qiu used a card to open the access control, entered room 216, took out the laptop from his school bag, opened the CHEMDRAW software, and started to draw the synthetic route of several materials based on the three optimization directions in the morning, and made a total of three pages of PPT, ready for use .
Tomorrow Friday, he will go to Kainan University in Tianjin with Teacher Wei to visit and exchange. Even if he wants to synthesize, he can only wait for next week.
They will take the high-speed rail from Magic City to Tianjin. The tickets were purchased by Feifei Wu on Monday, and the round-trip tickets have been bought.
Because it is not the peak period of the Spring Festival travel season, high-speed rail or high-speed train tickets are still very easy to buy. After all, the second-class seats cost about 500 soft coins, and the business seats are more than 1500 soft coins. The price is very expensive, naturally for passengers After screening, most passengers still prefer hard-seat trains such as K and T. The price will be much cheaper, only about 150 soft sister coins.
Of course, even though the ticket money can be reimbursed, Mr. Wei did not waste travel expenses, so he chose a second-class seat. As for the hotel accommodation arrangement during the visit, the organizer has already arranged it, so they don’t need to worry about it.
After finishing the PPT, Xu Qiu went to the laboratory in the center and began to prepare the solution.
This time, there are five newly synthesized acceptor materials. Xu Qiu chose two donor materials, namely H22 from the school girl and PCE10 as the benchmark material. In other words, a total of 10 solutions are required, which is quite troublesome.
In addition, a zinc oxide precursor solution was also prepared, and the solution of the senior sister had turned yellow last week.
At this time, Wu Shengnan, Wu Feifei and others have come to 216 one after another. Wu Shengnan saw Xu Qiu experimenting inside, put down his schoolbag, walked over, and said hello:
"Xu Qiu, morning, do you want to make organic solar cells today?"
"Organic solar cells, this statement is so formal..." Xu Qiu spit out, and then said: "We generally call this a device. I do make a batch of devices today. I plan to make ten systems. Now I am preparing solutions. Post-senior sister, let me walk you through the device preparation process." The newly-accepted post-doctorate younger brother, from photoluminescent materials to organic photovoltaics, she is a career change, and a lot of knowledge needs to be relearned.
"Okay." Wu Shengnan nodded, standing next to Xu Qiu nicely.
Xu Qiu glanced at the Wu Shengnan next to him, and somehow remembered the school girl. She was like that at that time. She stood beside him, sometimes pulling him to ask questions, but now the school girl has become able to A research worker on his own.
This time Xu Qiu did not intend to let Wu Shengnan interfere in the solution preparation. On the one hand, once the solution is mismatched, the device should be kept cool no matter how it is applied. The key point is that it is difficult to tell whether the solution is wrong with the naked eye; The speed of the solution is usually slow. Today's experiment is under a lot of pressure. In the evening, he will take time to discuss with Teacher Wei.
In reality, it is relatively slow to prepare devices. Even if the device is rotated in a single day, it can be used to make up to two batches of devices, about 40 pieces, and this is still sufficient.
If this kind of solution needs to be prepared freshly, it would be good to be able to make one batch a day. For example, the job of preparing a solution, 10 sets of solutions, if it is not a skilled worker like Xu Qiu, it is estimated that he will not be able to complete it in one morning. It's faster, it takes 5-10 minutes on average for a solution.
In the end, Xu Qiu spent more than an hour to successfully prepare 10 sets of solutions and zinc oxide precursor solutions, and even the Tito in the bottle was filled.
Leaving the glove box, Xu Qiu led Wu Shengnan to the ultrasonic cleaner and said, "I teach you how to clean the substrate..."
A total of 24 clean substrates were cleaned, just filled with a petri dish, and then spin-coated transfer layer, spin-coated effective layer, and evaporated.
There are ten sets of conditions for the effective layer. Xu Qiu plans to prepare 20 pieces. He only made one piece for each condition, and he succeeded in one shot. The success rate was 100%. He gave the remaining ten pieces to Wu Shengnan for spin coating.
Wu Shengnan painted three pieces, but the success rate is 1215, which is 80%. For the post-doctoral sister who is exposed to spraying for the first time, she can have such a high success rate, which is pretty good.
Xu Qiu remembers that when he taught Chen Wanqing, the senior sister had studied for a long time for the first time, and she hadn't learned yet...
For these ten systems, especially the best H22:ITIC system, Xu Qiu synthesized the conditions of the senior sister H22:IDT-ICIN system, and adopted the optimal conditions similar to those obtained in the simulation laboratory, because it will be synthesized next With receptor molecules such as IT-4F, IT-DM and FN-4F, the performance of the device will likely be further improved, and Xu Qiu has not kept a hand as before.
You can keep one hand, but it is not necessary.
After four o'clock in the afternoon, the vapor deposition of the device was completed and the test began.
The test is relatively simple. Xu Qiu directly asked Wu Shengnan to operate in the glove box, and he guided outside:
"Connect the positive and negative electrodes of the device to the source meter, red positive and black negative......"
"Set the test parameters, the area is 0.04 square centimeters..."
"First test the dark state..."
"A dark state curve like this is normal, and you can continue to test the bright state..."
The first device selected was the H22:ITIC system developed by Xu Qiu spin-coated, and the bright J-V results appeared on the computer screen.
"10.07%?!" Wu Shengnan asked in doubt: "This number does not seem to be low. The results reported by Chen Wanqing and the others last week, I remember 7.3%."
"Yes," Xu Qiu smiled and said: "It's almost certainly not low, and it's the same as the current world record for non-fullerenes."
"It's the same as the world record...?" Wu Shengnan was shocked on the spot. Her knowledge of the field of organic photovoltaics only heard a few words during group meetings. Recently, she was busy with her two articles and synthesizing with Xu Qiu. Time to learn the knowledge in this field systematically.
However, after all, Wu Shengnan is a postdoctoral postgraduate, and she quickly regained her composure. While continuing to test, she muttered in her heart: "This Xu Qiu student is really amazing. I don't know how my FNIC system is. If the efficiency is close to the world record. , Is there a chance to post an article on AM and JACS? However, Xu Qiu provided this synthesis idea. I don’t know if he is willing to give me a work...Hey, what do I want to do so much, as long as my thighs are tight There will always be opportunities in the future."
The test of this ITIC device is completed, and the highest efficiency is fixed at 10.09%.
As the result came out, Xu Qiu actively proposed: "Next, let's test the FNIC system of postdoctoral sister."
"Okay." Wu Shengnan picked up the H22: FNIC system components, and placed the connection line above the simulated solar light source.
"The first point is only 6.83%." After hurriedly measuring the other five points, Wu Shengnan said disappointedly: "The highest is only 6.92%."
Wu Shengnan picked up the battery device, looked at the label on it, and said, "This is not the device I painted. Is the performance of the system I synthesized really bad?"
"Isn't there another system?" Xu Qiu said in a casual tone: "Maybe a miracle will happen?"
"Another system, PCE10: FNIC? Let me try." Wu Shengman took the piece of device spin-coated by Xu Qiu with tweezers and started testing.
"9.42%?!" Wu Shengnan said excitedly: "So high!"
"Let me just say, don't give up easily. Hold on, the miracle will happen." Xu Qiu said with a smile, knowing that post-doctorate sisters are more concerned about the article, an extra explanation: "If the work is published early, In your system, it is not difficult to publish an AM grade article."
"You proposed this experiment idea by Xu Qiu, I..." Wu Shengnan said embarrassedly. She heard the potential meaning in Xu Qiu's words, that is, she wanted to give her a work of this work.
"It's a big deal, we are one, you are in the front." Xu Qiu waved his hand and said nonchalantly. He can't let the post-doctorate sister contribute nothing but it is no good. Later, he plans to let her help synthesize. Put a carrot in front of it.
"Okay." That's all, Wu Shengnan was not polite, nodded heavily, and said "thank you".
"It's okay, then you can continue the test, I will go back to the office first." The two most important systems have been tested, and Xu Qiu doesn't need to stay and watch.
In the end, all 20 devices were tested by Wu Shengnan. The highest efficiency of the ITIC system was 10.09% and the highest efficiency of the FNIC system was 9.47%.
The friends Wu Feifei, Duan Yun, and Tian Qing who stayed in Handan, after receiving the news, congratulated Xu Qiu and Wu Shengnan one after another. They were not too shocked. It was because Xu Qiu had created too many miracles.
The first time I was shocked, the second time I was surprised, and then I became accustomed...
After dinner, Xu Qiu called the school girl and relayed the device test results here.
"Congratulations brother~" Han Jiaying said happily. The donor material used is her H22, which shows that her Hxx series is also expected to become a benchmark donor material such as PCE10 and PCE11, exclusive to ICIN series ADA non-fullerene acceptors. body.
Because the school girl turned on hands-free, Chen Wanqing next to her also received the news.
"Hey," the senior sister sighed slightly and said: "I knew I would choose the other three paths...Is it too late to get on the bus now?"
"Don't be like this~EbookFREE.me~Xu Qiu knows that the senior sister is talking about a joke. Her IEIC derivatives have already been synthesized in half. How could it be possible to give up before the materials are synthesized, but she still comforted:
"Now that you have the IEIC system in your hand, after introducing oxygen, sulfur, and fluorine heteroatoms, the light absorption performance will likely be red-shifted. It may become an acceptor material with an ultra-narrow band gap, and a narrow band gap donor such as PCE10 and PCE11. Adaptation, performance will not be low."
"I borrowed your good words." Chen Wanqing finished speaking and passed the call to Han Jiaying.
The school girl turned off the hands-free, and chatted with Xu Qiu some whispers. The two were tired and crooked for a while before they hung up the phone.
Xu Qiu began to sort out the test results this time, and plan to put them in the PPT, and then in the evening when discussing tomorrow's exchange visit with Teacher Wei, they will report together.
PS: That... the double monthly ticket event is over soon, ask for tickets.
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