I Have a Research Support System

　　 About the simulation laboratory, Xu Qiu still has some questions, so he asked the system:

　　 "Can I enter the simulation laboratory in my dream?"

　　 [No, you can only enter when the host is conscious. 】

　　 "Can the time flow rate in the simulated laboratory be adjusted?"

　　【The current authority level is insufficient and cannot be adjusted. 】

　　 The system really doesn't let him take advantage of any loopholes.

　　 After confirming these two points, Xu Qiu started cleaning the substrate.

　　 This is his exclusive laboratory. Don’t worry about the washed substrates suddenly disappearing. For the convenience of subsequent experiments, it’s better to wash more.

　　…………

　　 Friday afternoon, laboratory.

　　 Tian Qing took a long vacation with Teacher Wei after the graduation defense, so only Chen Wanqing was in the laboratory.

　　 When Xu Qiu arrived, she was experimenting in the glove box.

　　 "Sister, are you preparing devices?" Xu Qiu asked.

　　 "Yeah, my six systems need to make a new batch of battery devices. Now the effective layer will be applied immediately. Today, they should be tested without overtime." Chen Wanqing said.

　　 "Okay, call me when I next vapor deposition, and I'll help you." Xu Qiu thought that his vapor deposition proficiency was less than Tier 4, so he took the initiative.

　　 "Okay, you have worked hard to learn from me."

　　 "It's okay."

　　 Xu Qiu returned to the desk and sat down and began to consider the arrangements for the exam week.

　　Review is naturally the main theme, but reading literature, doing experiments, and exercising can't fall behind.

　　 24 hours a day.

　　 If you want to complete the three-week task, you have to set aside one hour every day to read literature, one hour to run, two to three hours of experimentation, eight hours of sleep, and two hours of eating.

　　 There are nine to ten hours left, then six hours of review and two to three hours of rest.

　　The literature is mainly related to the project.

　　 The title of the project is "Preparation and Performance Characterization of Organic Solar Cell Devices Based on Flexible Substrates". The main difference from conventional battery devices is the difference in substrates.

　　 Therefore, it is first necessary to find flexible materials that can be used as substrates, and secondly, to find out the problems faced by flexible substrates and corresponding solutions compared with traditional glass substrates.

　　 In terms of experiments, Xu Qiu didn't plan to go to the laboratory, but was going to do it in a simulated laboratory, so that the experiment could be started or suspended at any time, which was more convenient and flexible.

　　 has two main directions, one is to solve the problems encountered in the project.

　　 The other is to explore the device manufacturing process based on PTB7-TH donor. He plans to also use PTB7-TH in the project instead of the previous P3HT.

　　 According to the literature, the highest efficiency based on PTB7-TH has reached more than 10%, and the acceptor materials used are traditional PC[60]BM and PC[70]BM.

　　 Moreover, the experimental results have been repeatedly reported by multiple research groups. This material has also been named simply and crudely PCE-10, which is currently the star donor material in the field of organic solar cells.

　　 If you can't lead the way in scientific research, you still have to keep up with the trend.

　　 "Boy, you can vaporize it."

　　 Chen Wanqing's voice called Xu Qiu back to reality. He nodded and then asked:

　　 "Sister, do you have any literature on flexible substrate organic solar cells?"

　　 "It should be there. Teacher Wei seems to have summarized it. I will look for it and copy it to you later." Chen Wanqing said.

"Ok."

　　…………

　　 there are a total of 18 substrates, based on 6 groups of P3HT:PC[60]BM:PC[70]BM blend films with different ratios, each group made 3 kinds of speed.

　　 Xu Qiu carried out evaporation and testing, everything went well.

　　 Experimental results show that as the mass ratio gradually changes from 1:1:0 to 1:0:1, the photoelectric conversion efficiency of the device first increases and then decreases.

　　 reached the extreme value when the mass ratio was 1:0.2:0.8, and the highest efficiency was 5.52%.

　　 Xu Qiu told the senior sister of the experiment results, and then said:

　　 "This is almost close to the world record, I remember the highest is 5.6%."

　　 "5.6% of the P3HT: PC[60]BM benchmark system, we also added PC[70]BM, so there is no comparability." Chen Wanqing said:

　　" Like the P3HT system, if ICBA receptors are used, the efficiency is 7.2%.

　　 And if you want to hit the world record, the battery device must go to a special testing organization for testing and issue a third-party inspection result before other researchers will recognize this data. "

　　 "Is this afraid of data fraud?" Xu Qiu asked.

　　"Yes, the cost of falsifying experimental data is almost zero. For example, if we change the effective area in the test software from 0.09 square centimeters to 0.08 square centimeters, the efficiency can be increased from 5.52% to 6.19%, a direct increase of 12.5%.

　　If we don’t do testing, we can’t see any flaws from the experimental data alone. "Chen Wanqing said.

　　 "No wonder there are so many cases of academic misconduct and academic misconduct every year. It is really easy to falsify results." Xu Qiu said.

　　 "But after all, the fake is fake. Like a landmine, it will be detonated sooner or later. A certain principal was exposed to fraud in early scientific research and then dismissed." Chen Wanqing said.

　　 Xu Qiushen nodded in agreement, and then asked:

　　 "Speaking of senpai mixing several commonly used raw materials, the efficiency has been increased from 5.28% to 5.52%, is it really meaningful?"

　　 "It's not really meaningful, it's mainly for training hands." Chen Wanqing shrugged and said:

　　"But how can I say this is the result of my one year of hard work. Even if it is a Chinese core journal, I have to find a way to publish it. And now, thanks to you, it is estimated that I will be able to post a second SCI.

　　 Next, I will do PTB7-TH, and then modify it based on it, synthesize new materials, and strive to publish a few good articles. "

　　 "Senior sister can definitely do it. UU reading www.uukanshu.com" Xu Qiu encouraged.

　　 "By the way, wait for the external quantum efficiency and EQE curve of the device to be tested." Chen Wanqing said.

　　 "I know this. It is used to calibrate the short-circuit current density. It is put together with the J-V characteristic curve in the literature." Xu Qiu said.

　　"Yes, the definition of EQE is very simple, it is the ratio of the number of electrons collected to the number of incident photons, and its value is usually between 0 and 1, for example:

　　 The external quantum efficiency of a battery device at 530 nanometers is 50%, which means that for every photon with a wavelength of 530 nanometers absorbed, 0.5 unit of photon is converted into electrons.

　　Because the test instrument is relatively large and cannot fit in the glove box, it is necessary to take the substrate out for testing.

　　 But the effective layer on the substrate, aluminum electrode, etc. will be oxidized in the air, so it needs to be installed in a sealed sample holder for testing. "Chen Wanqing said.

　　 Xu Qiu picked up the sample holder in the glove box and observed it carefully.

　　 It is divided into two parts, both of which are round iron parts.

　　 part is a platform with quartz glass, there is a square card slot on it, you can put a piece of substrate.

　　The other part is a cover with eight probes. After the cover and the platform are combined into one, the probes can be stuck on the six aluminum electrodes and ITO electrodes of the substrate.

　　 Only need to test the EQE curve of the highest efficiency device under each condition, so only 6 pieces are tested.

　　 Xu Qiu clamped a piece of device under test with tweezers, placed it on the platform with its back facing the quartz glass, and then pressed the lid on.

　　 Then tighten the three hexagonal screws on the cover, there is almost no gap between the platform and the cover, and it is difficult for outside air to penetrate into the sample holder in a short time, which can provide a short-term oxygen-free environment.