Chapter 26: Level 5 deduction

　　 After slowly adapting to the feeling of cold water, Xu Qiu opened the system interface:
　　【Scientific Research Support System】
　　 Permission level: 1
　　 Points: 1978
　　 Tasks in progress: 1
　　 Proficiency:
　　【Experimental operation class】
　　 Preparation method:
　　 Cleaning the substrate (fourth order 20%/fourth order 50%, ultrasonic cleaner, tweezers, nitrogen gun required)
　　 solution preparation (fourth order 10%/fourth order 50%, need glove box, heating stirring table, disposable syringe, medicine spoon, pipette)
　　 spin coating (fourth order 0%/fourth order 50%, need ozone generator, homogenizer, disposable syringe, tweezers, pipette gun, heating mixing table)
　　 Evaporation (three-stage 0%/fourth-stage 50%, glove box, evaporation equipment required)
Characterization methods:
　　Photoelectric performance characterization (fourth-order 3%/fourth-order 80%, glove box, source meter, J-V test software, solar simulation light source are required)
　　【Instrument equipment tools】
　　……
　　【Special category】
　　 Literature reading (94% for the first order / 50% for the fourth order)
　　Advanced task: prepare solar cell devices of the benchmark system and obtain a photoelectric conversion efficiency of more than 5%. Task reward: 2000 points, authority level +1.
　　##
　　 Xu Qiu did not expect that the system would also include the means of characterization in the experimental operation category, and completed the novice task V by mistake.
　　 is a pleasant surprise, but the first thing to consider is how to complete the advanced tasks.
　　He began to analyze:
　　 First of all, the system will not release tasks that are completely impossible.
　　 In order to complete the task, it must be improved on the basis of the existing experimental conditions.
　　The variables that affect the experimental results are: reagents, instruments, operations, accidents.
　　Reagents.
"Includes PEDOT, zinc acetate dihydrate, P3HT, PC[60]BM, various solvents, and so on.
　　 They are all purchased from major reagent vendors or specialized optoelectronic materials companies. Currently, laboratories do not have the ability to produce reagents on their own.
　　 It is said that the laboratory under construction on the Zhangjiang campus is mainly used for synthesis, but it has not been completed yet.
　　 Therefore, the reagent can be ignored first.
　　In terms of instruments.
　　Most of them are fool-like instruments similar to ultrasonic cleaners, and their influence can also be ignored.
　　 However, such as the glue spreader and evaporation equipment, there will still be a certain degree of influence, which can be considered.
　　Operational aspects.
　　The four operation steps are arranged in descending order of importance.
　　Cleaning the substrate is the smallest, basically negligible;
　　 Then there is evaporation. Although the operation is difficult, the program is basically set, and there is not much room for improvement;
　　 is followed by solution preparation, mainly the preparation of the effective layer solution. Different solvents, concentrations, and heating temperatures may affect the aggregation morphology of the polymer in the solution.
　　 The last is spin coating. The spin coating process of the effective layer will have a significant impact on the experimental results. Of course, this step is also related to the solution preparation.
　　 He learned from the literature that in organic solar cells, the effective layer uses bulk heterojunction, that is, two different materials are blended to form a thin film.
　　 Among them, P3HT is a polymer, and PC [60] BM is a small molecule. Their compatibility is not good and will form a three-phase structure in the film, that is, polymer phase, small molecule phase, and blend phase.
　　 The distribution of the three phases, that is, the microscopic morphology of the blended film, will affect the generation, splitting, transport, recombination, and collection of photo-generated carriers, thereby affecting the photoelectric performance of the device.
　　 Among them, the most ideal microstructure is the "double continuous interpenetrating network structure".
　　Different spin-coating methods and different film forming processes may result in great differences in the morphology of the resulting blended film.
　　 He had noticed this during spin coating before, so he operated strictly according to the system image.
　　 But if I want to seek a breakthrough now, I must change it.
　　The unexpected aspect.
　　 is not considered because it cannot be avoided.
　　……
　　 After comprehensive consideration, Xu Qiu decided to start with both solution preparation and spin coating.
　　 He intends to spend some points to deduce certain key skills to level 5 or higher.
　　 If you still rely on the senior's Tier 4 skills, the final result is likely to stay at 4.5%.
　　He looked at the requirements of two experimental operations in the system:
　　Solution preparation requires glove box, heating mixing table, disposable syringe, medicine spoon, pipette gun;
　　 Spin coating requires ozone generator, homogenizer, disposable syringe, tweezers, pipette gun, heating and stirring table.
　　 glove box, heating stirring table, ozone generator, first remove;
　　 medicine spoons, tweezers, disposable syringes, the priority is not high;
　　 The only thing left is a pipette and a glue spreader.
　　 After comparing the two, Xu Qiu felt that the pipette gun was more important.
　　Because of its greater flexibility and operability, the expected benefits of improving proficiency are also greater.
　　 "The system deduces the proficiency of the pipette gun to the fifth level."
　　【It takes 20%1000=200 points to derive the pipette gun to level 5 0%. Is it deduced? 】
　　 "Deduction."
　　【The deduction is successful. 】
　　 "The system, if you want to continue to improve, how do you calculate the points? Is it still 1% for every 100 points?"
　　【After the proficiency reaches the fifth level 0%, two deduction methods will be activated: one is to permanently increase 100 points by 1%; the other is to spend 500 points to provide an unlimited time fifth level 100% proficiency teaching. 】
　　 One is permanent promotion, and the other is temporary promotion. How should I choose ~EbookFREE.me~ Xu Qiu didn't have too much trouble, so he made a decision and chose the one with 500 points once.
　　 If you choose to upgrade permanently, even if you smash all the points in, you can only reach 17% of Tier 5. If you can't learn anything, you will lose a lot.
　　 However, the state of taking a bath is not suitable for learning, so he did not immediately exchange it.
　　……
　　 Back to the bedroom, Xu Qiu found Tao Yan just back.
　　 "I went back to the bedroom at this night, haven't you been outside?" Ren Bin quipped.
　　 "I went to study in classroom 3108 today," Tao Yan waved the U disk in his hand and said:
　　 "This is the review material for Chapter One of "Material Preparation and Processing" that I have compiled. Do you want it, Binzi."
　　 "Yes, yes, of course." Ren Bin hurriedly got up and took the U disk.
　　 "Tao Yan, you actually had a day when the prodigal son turned around." Xu Qiu said with emotion.
　　 "You still say me," Tao Yan winked, and said, "On the way back, I saw you walking on the road with a girl. Let me be honest, who is she."
　　 "Xu Qiu, you have changed, and you lied to me that you were doing an experiment." Ren Bin also booed.
　　 Xu Qiu shrugged helplessly, and said, "That's the senior sister in my laboratory. We walked together after the experiment."
　　 "Oh—" The two didn't believe it.
　　 The explanation is not clear, Xu Qiuguo slipped away and lay down on the bed.
　　 "The system costs 500 points and redeem for one level five 100% pipetting gun teaching."
　　【The exchange is successful. 】
　　 A virtual image appears.
　　 "I, system NB!"
five minutes later.
　　 "I, the system pits me!"