Chapter 47: New goal

　　 A few days later, Xu Qiu made two more batches of devices. One batch was made of repeated PEN substrates, and the other batch was made of glass substrates under the same experimental conditions.
In the 　　PTB7-TH system, the highest efficiency of the PEN substrate has been increased a little bit, reaching 8.20%.
　　The maximum efficiency of the standard sample under the glass substrate can reach 10.26%.
　　 This value is slightly worse than the 10.68% he obtained in the simulation laboratory before, which may be caused by the different device structure.
　　 PEN substrate cannot be thermally annealed at high temperature, so the normal structure of PEDOT:PSS transmission layer is used, while the inverted structure of zinc oxide transmission layer was used before.
　　 In addition, although the focus is on the PTB7-TH system, Xu Qiu also made the P3HT system.
　　 is mainly to make the article data more abundant, but also to show that this flexible substrate processing method is universal.
　　 After that, Xu Qiu completed various characterization tests, including light absorption spectrum, fluorescence spectrum, CELIV test, etc., and also took a photo of bending the PEN substrate device with two tweezers.
　　 In the gap between the experiment, Xu Qiu is also writing the final report of the project in the form of a paper.
　　 At this time, his advantage of reading a large amount of literature in the early stage is reflected, and he can also consult his senior sister at any time.
　　 Therefore, there is not much pressure to write Chinese papers.
　　 In the main text, Xu Qiu first numbered the four sets of device numbers. The PTB7-TH and P3HT systems of the PEN substrate were 1# and 3#, and the corresponding systems for the glass substrate were 2# and 4#.
　　 Then, the main thing is to compare the difference between the glass and PEN substrates, the impact on the device performance, and analyze the possible reasons.
　　 Like the optical performance, the light absorption spectrum and the fluorescence spectrum are directly measured for the effective layer film, and the data is the same for the devices on the two substrates.
　　 So there is no need to compare, just convert the obtained picture information into text.
For example: the main light absorption range of 1#, 2# effective layer blend film is 550-750 nanometers, the highest absorption peak position is at 680 nanometers, the main light absorption range of 3#, 4# is 300-600 nanometers, the highest absorption The peak position is at 530 nm.
　　 Fluorescence spectroscopy is relatively more complicated. Both systems need to test the fluorescence spectra of the donor and acceptor individual component films and blend films separately, and then calculate the fluorescence quenching efficiency.
　　 However, it is also not difficult to talk through pictures.
　　, like CELIV, it is to characterize battery devices, so the test results of devices with different sample numbers will be different, and comparative analysis is required.
　　 Xu Qiu’s test results:
The carrier mobility of 　　1# is 1.2E-4 cm square per volt second, and 2# is 2.5E-4 cm square per volt second. Obviously 2# is higher, but the two are in the same order of magnitude.
　　 Because the battery device corresponding to 2# has better performance, it can be explained that the improvement of carrier mobility leads to the improvement of device performance.
　　Further, the analysis can be continued. For example, the increase in mobility will reduce the charge recombination, increase the short-circuit current density, and so on.
　　 But if the other way round, if his test result is:
　　 2# is 1.2E-4 cm square per volt second, 1# is 2.5E-4 cm square per volt second.
　　 Then it can be said that the carrier mobility of the two is not much different, at the same order of magnitude, or that the carrier mobility has little effect on the photoelectric performance of the device.
When Xu Qiu first read the literature, he often wondered, for the same experimental phenomenon, why some people said it was the cause of XX, some people said it was the cause of YY, and some people said it was the cause of XXYY. A unified point of view?
　　 Later, as the amount of literature reading increased, he gradually understood the truth.
　　Materials, or in all experimental disciplines, all interpretations of experimental results are actually conjectures, and theories always lag behind experiments.
　　 It is impossible to create a perfect theoretical model out of thin air. If that is the case, just run a few supercomputers and calculate the best results.
　　The real situation is that researchers need to obtain a large amount of experimental data through continuous experiments, and then use these experimental data to establish a theoretical system.
　　 But even with the system established in this way, there may still be many problems, and the theory needs to be constantly patched.
　　 At the same time, there will be many phenomena that are difficult to explain. At this time, industry leaders will put forward many opinions.
　　 And other researchers will discuss these phenomena and put forward their own opinions when they publish papers.
　　 This process is similar to debate.
　　In the end, there may be only one unified point of view left in the academic world, or there may be multiple points of view coexisting, or a new theory will completely overthrow the previous theory in the future.
　　…………
　　 One week later, Xu Qiu completed the project closing report.
　　 At the same time, he also received a system prompt.
　　 [The advanced task has been completed, 2000 points are obtained, and the level of authority is +1. 】
　　 [The current permission level is 3, the simulation experiment system is upgraded. 】
　　【Analog Experiment System LV2:
　　It can scan the experimental equipment and consumables in a certain space and simulate them completely in the system space. The host can conduct experiments in the simulation laboratory, which consumes 100 points per hour.
　　 The current scannable space limit is 1000 cubic meters.
　　 The built-in acceleration function is turned on in the simulation laboratory. The current open rate is 0.5-2 times. When using this function, the consumption points are 100 rate points per hour. 】
　　 [Get an advanced task: publish an SCI paper as the first author. Task reward: 2000 points, authority level +1. 】
　　【Scientific Research Support System】
　　 Permission level: 3
　　 Points: 6978
　　 Tasks in progress: 3
　　 Proficiency:
　　【Experimental operation class】
　　 Preparation method:
　　Clean the substrate (fourth order 40%/fourth order 50%)
　　 solution preparation (fourth order 40%/fourth order 50%)
　　 spin coating (fourth order 40%/fourth order 50%)
　　 Evaporation (fourth stage 35%/fourth stage 50%)
Characterization methods:
　　Optical performance (fourth-order 40%/fourth-order 80%)
　　Optical performance (fourth order 5%/fourth order 80%)
　　 charge transport performance (third-order 30%/fourth-order 20%)
　　【Instrument equipment tools】
　　……
　　【Special category】
　　 Literature reading (62% for the second order / 50% for the fourth order)
　　 Weekly Task I
　　 Weekly Task III
　　 advanced mission
　　##
　　 I have accumulated a lot of points recently, UU reading www.uukanshu. com but Xu Qiu doesn't plan to use it for the time being, it's better to be a hamster first.
　　 On the one hand, there is no need to use the simulation laboratory. Although the acceleration function is turned on, the 2x speed is still not enough.
　　 On the other hand, the proficiency of most operations has reached level 4 or higher, and the error rate has dropped to a very low level. The proficiency can be accumulated over time.
　　 He has not encountered a major bottleneck in his experiments, and there is no need to use fifth-order deduction to seek inspiration.
Unknowingly, the system has been with Xu Qiu for nearly two months. The system is indeed like its name. It is used to assist scientific research. It cannot be used to create black technology far beyond the current human civilization, nor can he become a superman. .
　　 Xu Qiu-neng's current achievements depend more on his own efforts.
　　 At this stage, the system is not as helpful to him as he did when he first ventured into the scientific research circle. He can only expect to continue to raise the level of authority to bring surprises.
　　 Next goal, publish SCI papers.