Chapter 236: World record, here I come

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At five o'clock in the evening, Han Jiaying took five 3D-PDI products and boarded the school bus back to Handan campus.
These products include Xu Qiu's third-generation 568 series, each with more than 200 mg, and her own second-generation B4TB3T series, each with about 20 mg...
The molecular structure of Han Jiaying's second-generation product introduced several thiophene units and added several active reaction sites. Therefore, the method of first nitration and second selenization could not be adopted. The introduction of selenium atoms in the PDI bay position, her second The generation product is the final generation product;
And Xu Qiu's final product is the third generation.
Of course, the final generation product here is only temporary, and it can be further optimized and iterated, but it must be modified from the initial PDI, which is equivalent to re-planning the synthesis path.
Regarding "whether it is necessary to further iterate the product", Xu Qiu and Han Jiaying had discussed before. Taking into account the news that Mr. Wei had heard, "There are two or more research groups also studying the 3D-PDI system", the two finally decided:
Don't take that big step, it's easy to get involved...
Steadily, first complete these systems at hand, and publish the core work articles first.
Therefore, Han Jiaying brought back all the intermediate products involved in the process of synthesizing these five 3D-PDI molecules. Xu Qiu specially confessed to her before that each intermediate product retains about 20 mg. Now you can take it directly. These intermediate products do various basic characterizations.
In theory, if the synthesis of a new material is included in the published article, then the basic characterization of all intermediate products, such as nuclear magnetism, elemental analysis, and mass spectrometry, must be supplemented.
Unless, some of the intermediate products are reported in the literature or commercialized, then the literature can be directly cited, or the manufacturer of the purchase can be marked.
Their previous work based on the PCE11 series of polymer donor materials, monomer materials can be purchased directly, so these steps are omitted, as long as the final product is characterized.
But now it's different to make small molecule receptors. Every intermediate requires data.
Among them, Xu Qiu and Han Jiaying's system is not bad, there are not many reaction steps, and the workload will not increase too much.
However, Chen Wanqing's C1 and C4 systems have more than ten synthetic steps, that is, more than ten intermediate products, each of which has to provide a large amount of data, and the workload is significantly increased.
This is also the reason why she is unwilling to take the time to write the article, and then post a three-zone article-it is unpleasant.
Even the articles in the three districts must have complete data. It cannot be said that the articles are not of high grade, and the data can be lacking. There is no reason.
The school bus at half past five drove back to school at half past six.
Xu Qiu picked up Han Jiaying at the school bus stop. At this time, it was late March and it was a long time in spring. It was still bright at this time. The two of them were not too presumptuous in public campuses, and walked hand in hand towards Caiyi.
Along the way, I didn't meet any acquaintances.
When approaching the first floor of the material, Xu Qiu saw that Han Jiaying was still holding his hand, did not let go, could not help teasing: "Aren't you afraid of being seen by others today?"
"Um..." Han Jiaying tilted her head, "When the brother left, was there anyone else in the laboratory?"
"Tian Qing is here, she seems to be waiting for her girlfriends to eat together, and now I don't know if she has left." Xu Qiu said.
"That's it," Han Jiaying hesitated for a moment, as if she had made up her mind, "I'll see you when you bump into it. Anyway, our relationship will be made public sooner or later."
"Seriously," Xu Qiu turned to look at the school girl's profile, slightly red, a little cute, and then suggested: "I can go to 216 to investigate first."
"No, I was not mentally prepared before," Han Jiaying smiled, "I'm ready now."
"Okay." Xu Qiu stopped, turned around and rubbed the school girl's hair, she also cooperated like a kitten, rubbing against his big hand.
Stayed there for a while, and continued to walk towards the laboratory.
Not long after, the two arrived at door 216. The door was locked and the lights were turned off.
"It seems that Senior Sister Tian Qing has already left." Han Jiaying said with some joy.
"Yeah," Xu Qiu didn't break, and continued: "We first transferred the synthesized product to the glove box, and then went looking for food. It was almost seven o'clock."
"Okay, I'm also a little hungry." Han Jiaying finished, unzipping the outer zipper of the schoolbag, and took out a white garbage bag from the interlayer. You can vaguely see several glass bottles inside, "There are more than 20 in total, Including all the products and intermediate products, I have already labeled them."
"Thanks for your hard work, eat more today." Xu Qiu took the garbage bag, and during the transfer process, the bottles collided with each other and made a "ding-ding" sound.
"Just treat yourself to a cup of milk tea," Han Jiaying sighed lightly, "Hey, the other day I weighed two kilograms of weight again. It stands to reason that the amount of experimental exercise every day is not small, why can't it be reduced."
Xu Qiu looked up and down the figure of the school girl while wearing lab clothes and gloves.
Because she came back from Zhang Jiang's experiment, she wore a conservative dress. The lower body was denim trousers, which was completely covered, and she couldn't see anything. The upper body was more prominent, so he couldn't help but look more.
"I don't think you are fat, you should be considered thin." This is exactly Xu Qiu's true thoughts, and there is no duplicity.
"Well," Han Jiaying was a little happy, "However, it is already 98 kilograms now, so I still have to control it, otherwise I will run into the triple digits."
"1 meter 65, 98 jin, it is a normal good cut," Xu Qiu urged: "Be obedient, eat more and gain more weight. It's not good to be too thin."
"Okay, but..." Han Jiaying tilted her head, "It always feels like a conspiracy."
"No." Xu Qiu shook his head, transported the glass bottle together with the garbage bag to the transport cabin, and then secretly vomited, ‘I’m not saying that the weight is less than a hundred, and it’s either flat chest or short. Why does it fail here? ’
Then, he entered the glove box, sorted the glass bottles in his lock box, made a backup copy in the simulation laboratory by the way, and let the simulation experimenters explore the device performance based on the five final generation 3D-PDI products.
Compared with the rough preliminary exploration mode before, Xu Qiu made some improvements this time:
On the one hand, he fixed the choice of donors and only used PCE10 and P3TEA, the two donor materials that performed best in the previous experiments.
On the other hand, he also expanded the scope of the experimental conditions, letting go of the regulation of DA ratio, solvent type, addition ratio, etc., which were all fixed before.
In general, exploration has become more purposeful and refined, at the cost of longer time and more points.
However, now that the final generation product has been obtained, the main content of the next experiment is to improve the performance of the device. It is about to go to a decisive battle with these materials. Naturally, Xu Qiu will not save this point.
After a week of high-intensity experiments, Xu Qiu and Han Jiaying had some lack of energy and did not go out at night. First they went to the North District restaurant and ordered a large pot of grilled black fish. After the dinner, they went back to their dormitories to rest.
Saturday afternoon.
Han Jiaying proposed to go out to play. Xu Qiu naturally had no opinion. After discussing it, the location was chosen in the exhibition hall under the Oriental Pearl Tower of the Magic City.
An appointment was made to meet downstairs in the school girl's dormitory. Xu Qiu arrived a while earlier. After waiting long, Han Jiaying opened the door of the dormitory and trot to his side.
Xu Qiu's eyes lit up. Today, the school girl seriously dressed up with light makeup. She has a short white coat on her upper body, a dark gray pleated skirt on her lower body, and a small pink bag diagonally across her shoulders.
The two took the subway to reach the landmark building of the Magic City, the Oriental Pearl Tower, buy tickets, and the Progress Hall.
One of the exhibition halls is the Aquarium, which is said to be the largest man-made seawater aquarium in the world. Through tunnels, you can be visited by various marine creatures such as jellyfish, fish, and turtles;
The other is the Impression Light Painting Art Museum, which mainly uses spatial optical illusions and light and shadow special effects. The experience is good and it is more suitable for taking pictures.
After wandering around the exhibition hall for more than two hours, the two of them found a Southeast Asian restaurant near their home and tasted exotic food, such as Tom Yum Goong soup, beef curry, hot and sour chicken feet, roast pork neck with sweet and spicy sauce, coconut panna... …
After the meal, I took another cruise on the Pujiang River. After all, I came here.
Happy hours are always short. In a blink of an eye, it's Sunday and it's time to go to work again.
The simulation experiment system II has been running continuously for nearly two days, and finally stopped, consuming more than 4,000 points, and now the point inventory is only about 3W.
The device performance data of the five systems are all available.
Among them, Xu Qiu's three-generation 568 series have the highest efficiency of 6.73%, 7.01% and 7.42% respectively;
Han Jiaying's second-generation B3T-6 and B4T-6 series have maximum efficiencies of 5.75% and 6.51%, respectively.
"Up to 7.42%!"
"Even the school girl has the highest system of 6.51%!"
"This time the increase is so big!"
Xu Qiu was excited for a while, gradually calmed down, looked at the result of getting it, and began to analyze:
Xuemei’s second-generation 3D-PDI series can reach 6.51% efficiency. It seems that the potential is slightly higher than my system. Unfortunately, there is no way to introduce selenium atoms to directly obtain the third-generation product.
After that, she can try to introduce selenium atoms into PDI molecules from the source.
The simulation experiment applied a new control strategy, and it took nearly two days. Five receptors and two donors, a total of ten systems, explored hundreds of conditions, saving more than ten times the time.
The improvement in device efficiency is indeed very large. For my third-generation 5 series, the highest value given by the initial system exploration before is 5.98%, and it has now been optimized to 6.73%.
However, hundreds of conditions have been explored, and the number of repeated samples is large enough, which also means that the upper limit of the current system has been basically reached, unless...
Make changes based on the status quo.
As for the way to change, the most direct way is of course to change the molecular structure of the material. This is not considered for the time being.
Then we can only improve the current device processing technology ~EbookFREE.me~ which is to add experimental variables.
Just like the previous exploration of the PCE11 system, the development of thermal spin coating, spray coating and other means is a means of adding variables.
However, I can only rely on myself in this respect, and simulation experimenters can only perform deductions based on my ability, and cannot improve spontaneously.
When I did the actual device operation last time, there was a flash of inspiration. If I can grasp it, maybe I can go further.
In any case, it has now been optimized to 7.42%, which is only 0.58% away from 8%. There is no reason to give up.
Let's set a small target first-8%, which is also the current world record for the efficiency of organic photovoltaic devices based on the PDI system.
World record, here I am.
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