I have read some papers mentioning that the dynamic spin-coating for the Spiro layer would do less damage to the perovskite layer, but a lot of papers not mention the "dynamic" in their recipe. I am not sure dynamic or normal spin-coating works better for the perovskite solar cell. Also, the amount of the Spiro used also varies according to different papers. Some only use very small amounts like 30-40ul, but some use 80ul. Does it make a huge difference with a different amount of Spiro for the spin-coating step?
Hi Cai,
It is really dependent on the property of the layer underneath. For example, usually, if you want to deposit spiro on the perovskite layer, normal spin-coting with a 40-50 uL amount is ok for a 1-2 cm2 substrate. However, if there is a passivation layer on top of your perovskite layer which is hydrophobic, you need to use dynamic coating and increase the amount of solution used.
Best regards,
Leiping Duan,
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