I am working with CsFAMA triple cation perovskite. I do not get any PL signal for my perovskite deposited on plain glass or on FTO glass but the Perovskite deposited on NiOx with same deposition condition give me high PL intensity, what could be reason behind this and what would be the possible solutions?
Thank you.
Maybe deposited on plain glass or on FTO glass change the energy gap of the perovskite specimen. I suggest the energy gap becomes lower, so electrons have jumped to higher states at experiment temperature. I think lower the experiment temperature could be one possible solution.
@Bipin Rijal, you not getting any PL signal maybe due to various factors that borders around:
Surface passivation, Energy level alignment, Crystal quality, Charge extraction, Optoelectronic properties.@
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