Photodetectors: Microengineered CH₃NH₃PbI₃ Nanowire/Graphene Phototransistor for Low‐Intensity Light Detection at Room Temperature (Small 37/2015)

E. Horváth and co-workers report the first hybrid phototransistors where the performance of a network of photoactive organometal halide perovskite nanowires (methylammonium lead iodide - MAPbI3) is enhanced by CVD-grown monolayer graphene. On page 4824, these microfabricated devices show responsivities as high as 2.6 × 106 A W−1 in the visible range. The dramatic enhancement of the responsivity at very low light intensities (pW) suggests the use of MAPbI3 nanowire/graphene devices as lowlight imaging sensors and single photon detectors.