A self-driven perovskite photodetector array for imaging application by suppressing optoelectrical crosstalk

With the advancement of photodetector technology, applying perovskite photodetectors in imaging sensors has become a pursued goal in the field of optoelectronics. The main challenges to integrating perovskite photodetectors for imaging are energy consumption and the optoelectrical crosstalk between pixels. Herein, a self-driven 10 × 10 perovskite photodiode-blocking diode photodetector array with a resolution of 89 pixels per inch (ppi) is presented. The device shows excellent responsivity, detectivity, and pixel-wise rectifying properties due to the integration of a blocking diode (BD) into the positive-intrinsic-negative (PIN) structure. In addition, an outstanding imaging capability is obtained by suppressing optoelectrical crosstalk in the array. Finally, the underlying mechanism of suppressing optoelectrical crosstalk through the integration of BD into photodiode (PIN) is elucidated.