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Hybrid Perovskite‐Based Position‐Sensitive Detectors

A light‐dependent position‐sensitive detector (PSD) is demonstrated using an active layer of organic–inorganic halide perovskite. The lateral device is demonstrated using indium tin oxide coated glass as common back electrode and gold as the top electrodes. Apart from the linearity and the large span of position sensing range, the PSD response is characterized by a sizable responsivity. The device geometry for PSD also permits a high spatial resolution and transient signal mapping of the lateral photovoltage. These results can be understood in the framework of drift‐diffusion model and offer another valuable use for hybrid perovskite systems.