Synthesis and Characterization of 2D WSe2 and Triple Cation Perovskite-Based Photoabsorbers

Transition metalMetals dichalcogenides and perovskitesPerovskite have been gaining attention for their impressive optoelectronic performance towards photonics and renewable energy applications. In this work, optoelectronic devices were fabricated from a mechanically exfoliated WSe2WSe crystal and ink-based triple cation perovskitesPerovskite-based photoabsorber devices placed on oxidized silicon substrates. We conducted spectroscopy studies on both devices prior to the electrical characterizationCharacterization. We characterized the Raman \({E}_{2g}^{1}\) and A1g peaks for the WSe2WSe and the photoluminescence peak for the perovskitePerovskite occurred at 763.63 nm with an optical bandgap of around 1.635 eV, calculated through optical absorption spectroscopy. PhotocurrentPhotocurrent measurements were made for both devices using a broadband light source. This study provides insights into the performance of WSe2WSe photodetectorsPhotodetector and cesium-based triple cation perovskitesPerovskite, contributing to their potential applications in various fields, including imaging, photonics, and optical communications.