Solution-Processed Ternary Perovskite-Conjugated Polymer Photodetector with a Photoresponse up to 1200 nm

Broadband photodetectors have been used in various scientific and industrial sectors. Studies indicated that hybrid organic–inorganic metal halide perovskites (MHPs) are one of the semiconductors used for approaching sensitive photodetectors. Here, we reported solution-processed broadband photodetectors based on the ternary MHPs-conjugated polymer composites, which are operated at room temperature, where the ternary MHPs-conjugated polymer composites are composed of three-dimensional MHPs mixed with two-dimensional MHPs and then incorporated with low bandgap conjugated polymer. The ternary MHPs-conjugated polymer composites possess enhanced charge carrier mobility and suppressed defects. As a result, the ternary MHPs-conjugated polymer photodetectors exhibit a broad photoresponse, boosted photocurrent, and suppressed dark current, resulting in a detectivity of ∼10 11 cm Hz 1/2 W –1 (jones) from the ultraviolet to visible region and a detectivity of ∼10 10 jones in the near-infrared region. Our studies indicate that we provide a simple way to approach broadband photodetectors based on the ternary MHPs-conjugated polymer composites.