Template-free synthesis of perovskite (PEA)2PbI4 nanowires by ion-intercalation processing for single-nanowire photodetectors

Being different from the bulk semiconductors, one-dimensional (1D) semiconductor nanowires (NWs) have showed advantages such as high-density data storage, large-scale optoelectronic integration, and highresolution optical imaging systems. Here, a template-free synthesis of perovskite (PEA)2PbI4 NWs by ionintercalation processing and their applications for single-nanowire based photodetectors Ag/(PEA)2PbI4/Ag fabricated through interdigital electrodes, are presented. The dark current from the as-fabricated photodetectors Ag/(PEA)2PbI4/Ag is very low (- 4.792 x10-11 A) due to the large electrode spacing, and a high responsivity of 2.098 A/W with a specific detectivity of 1.752 x 1012 Jones under 4.99 mu W/cm2 520 nm illumination, and a high responsivity of 1.998 A/W with a specific detectivity of 1.669 x 1012 Jones under 5.01 mu W/cm2 365 nm illumination, were obtained at - 5 V. Therefore, such a feasible synthesis method provides a promising way for low-cost, template-free, easy transferring for solution-synthesized perovskite NWs with high yield and repeatability, as well as for enhanced-performance individual NW optoelectronics.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

This study presents a template-free synthesis of perovskite nanowires using ion intercalation processing, and demonstrates their applications in single-nanowire based photodetectors. The fabricated photodetectors show low dark current and high responsivity, indicating that this synthesis method is promising for low-cost, high-performance nanowire optoelectronics.