the TTIP i used in lab wasnt colourless and it was hard to handle too as it crystallized in the air. how come yours is colourless and didnt even crystallize. our pipette tube blocked due to its crystallization?
Its likely your TTIP is contaminated, and its not good anymore. TTIP is clear solution, stored in refrg and avoid contamination. I hope this helps. If you are making PSCs for the first time, check out two step method as well ruclips.net/video/sus-bxdVgUw/видео.html
I believe the main anode electrode is FTO (accept negative charges) and the main cathode electrode is carbon (accept positive charges). The 2nd piece of FTO glass is only used as a mean to create a conductive pathway for electrical characterization as well as protect the solar cell from direct exposure to ambient condition.
Thank you for your nice answer. I agree with you. The carbon black can be use directly as the electrode and the 2nd FTO glass is only for pathway and protection. The contact between the carbon black and the 2nd FTO should be like metal/metal.
Hi. How did you make the DPS solution? What is the solvent and Molar concentration? I made a 0.25M DPS in MeOH and added the CuSCN but the CuSCN didn't dissolve after stirring overnight at RT.
Hello I am student working on perovskite solar cells and I have been following your video.My perovskite layer is turning red when heated and I dont know why.Can you give some insight.
Check if the temperature is too high. If you are making PSC cells for the first time, I highly recommend using the two step method: ruclips.net/video/sus-bxdVgUw/видео.html Let me know if you have questions.
Jesus Rafael actually no, the excess iodine from the 1:3 PbCl2:MAI ratio form the MaPbI3 perovskite. The role of chloride in this fabrication method is highly debated but it is likely acting as a dopant, as well as incorporated (
The chloride ion is too small to go into MAPbI3 structure. This structure is largely a cage formed by Pb and I ions, while MA sits in the cavities. The Chloride ion doesn't go into the bulk perovskite, but may fill surface traps and suppress charge recombination, giving highly efficiency. I hope the explanation helps. Also check out the two step process that doesn't use Chloride ion: ruclips.net/video/sus-bxdVgUw/видео.html
Did you coat HTL layer on hot substrate?
can i use tetrabutyl titanate and plz determine the correct concentration?
the TTIP i used in lab wasnt colourless and it was hard to handle too as it crystallized in the air. how come yours is colourless and didnt even crystallize. our pipette tube blocked due to its crystallization?
Its likely your TTIP is contaminated, and its not good anymore. TTIP is clear solution, stored in refrg and avoid contamination. I hope this helps. If you are making PSCs for the first time, check out two step method as well ruclips.net/video/sus-bxdVgUw/видео.html
@@stemlearningkit933 thanks a lot for ur response
If both electrodes are ITO, how can the charges separate and flow in different directions?
I believe the main anode electrode is FTO (accept negative charges) and the main cathode electrode is carbon (accept positive charges).
The 2nd piece of FTO glass is only used as a mean to create a conductive pathway for electrical characterization as well as protect the solar cell from direct exposure to ambient condition.
Thank you for your nice answer. I agree with you. The carbon black can be use directly as the electrode and the 2nd FTO glass is only for pathway and protection. The contact between the carbon black and the 2nd FTO should be like metal/metal.
Hi. How did you make the DPS solution? What is the solvent and Molar concentration? I made a 0.25M DPS in MeOH and added the CuSCN but the CuSCN didn't dissolve after stirring overnight at RT.
what is full form of DPS ?
Hi Ansil, we dissolved CuSCN in Dipropyl sulphide overnight. The concentration is low - 0.05 M, since the solubility is low.
Hello I am student working on perovskite solar cells and I have been following your video.My perovskite layer is turning red when heated and I dont know why.Can you give some insight.
perovskite film color is brown~dark. Maybe, red means perovskite didn't form.
Or please check antisolvent.
which precursor solution you are using? if it contains bromide, then your film is supposed to turn red.
Check if the temperature is too high. If you are making PSC cells for the first time, I highly recommend using the two step method: ruclips.net/video/sus-bxdVgUw/видео.html Let me know if you have questions.
The Chlorides are substitued by iodides in the perovskite?
Jesus Rafael actually no, the excess iodine from the 1:3 PbCl2:MAI ratio form the MaPbI3 perovskite. The role of chloride in this fabrication method is highly debated but it is likely acting as a dopant, as well as incorporated (
The chloride ion is too small to go into MAPbI3 structure. This structure is largely a cage formed by Pb and I ions, while MA sits in the cavities. The Chloride ion doesn't go into the bulk perovskite, but may fill surface traps and suppress charge recombination, giving highly efficiency. I hope the explanation helps. Also check out the two step process that doesn't use Chloride ion: ruclips.net/video/sus-bxdVgUw/видео.html
What is meaning oF DPS solvent ?
Diphenyl sulfone???
DPS: Dipropyl Sulfide
@@stemlearningkit933 can i use another solvent for CuSCN?
The project like this step by step is described on the Avasva website and many more plans you can find on that website.
this is very unaccurate approach. I wonder how you get high efficiencies=(