Hello guys,

I am optimizing a perovskite photodetector device with the device structure ITO/PTAA/Cs0.15FA0.85PbI3/PCBM/BCP/Ag.

PTAA (2 mg/mL): 5000 rpm/30 sec

Perovskite (1.3 M): 1000 rpm/10 sec. and 5000 rpm/30 sec. In the last 10 seconds, EA (ethyl acetate) was used as the antisolvent to increase crystnillity.

PCBM (20 mg/mL): 2000 rpm/30 sec

BCP (0.5 mg/mL): 5000 rpm/30 sec

Till now, I can achieve Jsc around 16 mA cm^-2.

Please, anyone suggest how to make it above 20 mA cm^-2?

Thank you so much.