What does the color of a spiro-ometad film indicate?
I got purple, green, red, even black color of the spiro film. Is there anything we can get from the preliminary color analysis(e.g. oxidation state, thickness?)
Dear Mikhail Pylnev thank you for your interesting question. Personally I'm not an expert in this field, but I noticed that there is a closely related earlier ResearchGate thread on the same topic:
Color of spiro-OMeTAD?
https://www.researchgate.net/post/Color_of_spiro-OMeTAD
Perhaps you could get in touch with Minkyu Kim for further discussion about this problem.
Dear Mikhail Pylnev P.S. The color of spiro-OMeTAD also depends on the solvent. Please also see this potentially useful link entitled
The color of Spiro-OMeTAD of dissolvived material in defferent solvents
http://www.chemborun.com/products/The-color-of-Spiro-OMeTAD-of-dissolvived-material-in-defferent-solvents-2280845.html
Mikhail Pylnev in this context please also see this "colorful" article entitle
Efficient Colorful Perovskite Solar Cells Using a Top Polymer Electrode Simultaneously as Spectrally Selective Antireflection Coating
Thank you, Frank T. Edelmann !
However I did not find clues in the references provided
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