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

Abstract

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 MHPsconjugated 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.