Chapter 329: Efficiency broke through 12% for the first time!

After installing the sample stage, you need to put the sample stage back into the evaporation chamber.
It is easy to disassemble, but difficult to put it back, because there are many restrictions on the operation in the glove box.
On the one hand, it is inconvenient to operate wearing thick rubber gloves. On the other hand, the main reason is that the length of rubber gloves is limited. The position of the sample table is at the limit of the glove, and the left hand must be extended. It's very straight to get it.
Coupled with the glove box glass block, two hands cannot be extended to the position of the sample stage at the same time, which means that it must be operated with one hand.
Xu Qiu fumbled for a long time in the glove box and thought of a solution.
First, use the and ring finger to support the sample table weighing more than one catty, and then use the thumb and index finger to screw on the spacers and screws. At the same time, he is still squatting halfway with his body outside.
Then, Xu Qiu showed a posture similar to lifting a boulder above his head.
As a result, just these three screws, he spent more than 20 minutes, and he was sweating half of his body, feeling like a fight with a school girl.
When I thought that I might have to change back to the original mask, Xu Qiu fought two battles. It seems that I still have to optimize the disassembly plan in the future...
After completing this operation, Xu Qiu mastered the skill of "replace sample table", synchronously copied the vapor deposition glove box with the changed mask into the simulation laboratory, opened the performance exploration, and selected several standard samples. experiment.
Afterwards, Xu Qiu looked at Han Jiaying and Mo Wenlin beside the spin-coated glove box, and found that the two of them were talking and laughing.
Wasn't it still a rattling look before?
Sure enough, women are a group of strange creatures.
However, now it is much more reliable to teach Mo Wenlin as Han Jiaying than the senior sister was responsible for.
And girlfriends or something, hehehe...
Xu Qiu walked over to the two of them, confessed that they would pay attention to the orientation of the substrate during evaporation, and then returned to the office to continue writing the article.
Now that a week has passed, the overall framework of Xu Qiu's two articles has been completely constructed, and the degree of completion of the papers has reached more than 60%.
This progress is still very rapid. After all, there have been too many articles. Xu Qiu also summed up a set of writing routines. For a similar system, just change to a template and apply it.
It's not that Xu Qiu didn't want to write "new" things, but objectively, there was really nothing new.
The field of image materials belongs to applied science. It depends on a little progress and moves forward step by step. In the end, the quantitative change reaches the qualitative change. This is what he is doing now.
If you want to do it overnight, let's dream, there is everything in the dream...
Moreover, new does not mean good. Most of the "new" things in the academic circle are new because they are bad...
For example, a new scientific researcher may have doubts, "Why don't we do the XXX structure? No one has done this new structure. Why do we have to follow in the footsteps of the boss and build a similar structure?"
The answer is actually very simple. The high probability is not that no one does it, but someone does it, but the performance is not good.
Doing scientific research in reality is not a novel. If you follow a dead end, you will end up with death. There is no chance or grandfather.
In the evening, Mo Wenlin and Han Jiaying got the test results of the new version of ITO devices.
Compare with the highest value of the previous standard sample system, if you do not add the shielding baffle, directly test the 2 square centimeter device, the efficiency attenuation range is between 30%-60%;
Choose the same 0.09 square centimeter shielding as the standard sample, and the efficiency attenuation range is about 10%-20%;
With small-sized shielding baffles, 0.04 and 0.01 square centimeters, the efficiency attenuation ranges are reduced to 5%-15% and 0%-10% respectively.
Han Jiaying found Xu Qiu, reported the results, and analyzed: "Compared with the original standard sample, the performance gap of the new ITO pattern is a bit big. For example, the efficiency of the original system is more than 10%, but now a 0.09 square centimeter mask is used. In the test, the efficiency is only 8.35%."
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"On the surface, it looks like this, but..." Xu Qiu said, "Now it is only the data of 20 substrates, the number of samples is too small, and the data of the standard samples are the highest value repeated many times, so it cannot Jump to conclusions easily."
"That's right," Han Jiaying nodded, and said, "Then Mo Wenlin and I will try out a few more devices next week."
"Okay," Mo Wenlin also replied: "This time may also be related to my poor spin coating."
"Come slowly, just practice more." Han Jiaying encouraged.
Xu Qiu looked at the two girls in confusion.
Then, Han Jiaying took the initiative to smile and said: "Brother, I will introduce you again. This is my good girlfriend Mo Wenlin. You can't bully her in the future."
Xu Qiu:? ? ?
Well, anyway, it is a good thing for two people to live in harmony.
In the evening, Xu Qiu returned to the bedroom.
He was the only one in the dormitory in recent days. Tao Yan was still abroad. It is said that he would not come back before the graduation ceremony. Ren Bin also went back to his hometown in Xinjiang, but he has not yet returned.
Now that graduation is approaching, the students have begun to move and throw things one after another. You can see all kinds of debris piled up in the trash can.
There is also a special donation box downstairs, where you can put old clothes into it, which will be donated as love to students in backward areas.
Occasionally, there will be old men buying scrap books. The purchase price of textbooks bought for dozens of dollars before is only about one piece.
However, the compulsory courses of basic subjects such as "Advanced Mathematics", "Mathematical Analysis", and "C Programming", or the textbooks of political courses such as "The Outline of Modern History" have not depreciated much, and they can sell for 5 yuan or 10 yuan. Block.
In addition, after the senior graduates get their graduation certificates in July, the school will start to push people out and cannot continue to live in the original undergraduate dormitories.
The new dormitory for graduate students cannot be allocated until the beginning of the school year. Therefore, Xu Qiu was in a situation of homelessness before the graduate school officially enrolled.
Fortunately, graduate students like him can temporarily store their luggage at the school.
Of course, these are all small problems, presumably Teacher Wei will help solve them.
Isn't there a saying, if you have any questions, look for Xingsi.
Xu Qiu entered the simulation laboratory.
At this time, the simulation laboratory has completed thousands of performance tests based on the new ITO pattern device and summarized the results.
First of all, compared with the standard sample, using the same size, that is, 0.09 square centimeters, to test the new version of the ITO patterned device, the average efficiency attenuation is about 6%.
Among them, the new version of the device based on the system, the highest efficiency is 9.53%.
This shows that the actual impact of lateral current on device performance is not as exaggerated as Gong Yuanjiang said before.
What Mo Wenlin said is correct. It may indeed be that her batch of devices has not been completed. Of course, this is the third time that she has made devices. It is a bit worse, and it is understandable.
This efficiency decay is bad news for the time being, and the rest is good news.
On the one hand, a device prepared with a new ITO pattern can theoretically get countless results points for a single device. Every time you test, change the position of the shielding plate to create a new battery device.
However, the amount of data obtained in a single preparation of devices can be reduced, which can reduce the number of device preparations. The results that can only be obtained with 10 batches and 15 batches of devices before, may now only need 5 batches or 8 batches, which can shorten the time for experiments.
On the other hand, considering that the film thickness and blend morphology at different positions on the same device are slightly different, testing at different positions on the device is actually a process of exploring the preparation conditions, similar to the previous regulation of spin coating speed The operation of ~EbookFREE.me~ In addition, in the sprint efficiency, you can also use a small size of 0.01 square centimeters.
Just like in this exploration process, although the efficiency of the large size of 0.09 square centimeters decreased by about 6% on average, the efficiency of 0.01 square centimeters increased by about 3% on average.
As a result, Xu Qiu directly broke his previous record system. The highest efficiency broke through. This was the first time that his device efficiency exceeded 12%, which was one step further from the world record.
Moreover, this kind of test result is also recognized by the simulation experiment system, and the system's advanced tasks are also updated to:
Advanced task (choose one of three): Break the world record for photoelectric conversion efficiency in the field of organic solar cells with an increase of more than 0.5%. (The current world record is the target value for the host and the current highest value is published as the first author/first corresponding author 10 articles in SCI area 1 (the host has published 3 articles); as the first author/first corresponding author, publish an article in any of the journals "Nature", "Science", and "Cell".
PS: Guess which one of the three tasks will be completed first? A. Breaking records B. Ten articles in one district C. Published CNS top issue.