Journal Article halide perovskites solar cells 2D ferroelectric material 2D perovskite ADC‐bipolar electropolymerization InP/ZnSe heterostructured nanocrystals blue photodetectors carrier dynamics carrier mobility compositional engineering conductive polymers crystalline organohalide crystallizations endurance hardware security humidity image sensors in situ studies indoor perovskite solar cells multi‐gate synaptic circuit non‐volatile memory one‐shot integrable electropolymerization organic electrochemical synaptic transistors orientation perovskite films physical unclonability reproducibility resistive switching scalability