Resolving Weak Light of Sub‐picowatt per Square Centimeter by Hybrid Perovskite Photodetectors Enabled by Noise Reduction

A highly sensitive hybrid perovskite photodetector is demonstrated to be able to directly resolve light irradiance down to sub-picowatts per square centimeter, in good accordance with the calculated noise equivalent power, which is enabled by electron and hole transport layer engineering, especially the trap passivation effect of the double fullerene layer.