High-Performance Directly Patterned Nanograting Perovskite Photodetector with Interdigitated Electrodes

摘要

Solution-processed organic–inorganic metal halide perovskites haverecently attracted tremendous attention in the photodetector communitydue to their excellent optoelectronic properties and facile fabrication. Themain challenge in perovskite photodetectors (PSPDs) is to achieve highresponsivity and fast speed simultaneously. In this work, this challenge isovercome by employing a directly patterned nanograting methylammoniumlead iodide (MAPbI_3) film in metal-semiconductor-metal (MSM) PSPD oninterdigitated indium tin oxide (ITO) electrodes. Because of the improvedperovskite morphology after directly patterning by nanoimprint lithography,as well as the enhanced electric field intensity by the perovskite nanogratingand interdigitated electrodes, the PSPDs have responsivity of 441 A W~(?1),detectivity of 8.32 × 10~(12) Jones, response time of 10.7 μs, all of which areamong the best performances in MSM PSPDs. Moreover, the PSPDs maintainexcellent photocurrent performance after 20 days of air exposure. Theapproach opens a path to manufacturing-friendly, high-performance, andreliable PSPDs and paves the way toward perovskite-based optoelectroniccircuits.