Abstract
The present research is conducted to investigate the effect of Au coating on the physical properties of the nanostructured Bi2S3 for optoelectronics applications. The Bi2S3 films are deposited using the chemical vapor deposition (CVD) at three different temperatures. The structural analysis shows the formation of polycrystalline orthorhombic Bi2S3 films and Bi-rich composition. In addition, the morphological studies indicate dense and compact films with nanorod-like morphology on the surface. Optical evolution of Bi2S3 films demonstrates an increase in the optical energy band gap (Eg) once the deposition temperature increases. Moreover, the addition of Au coating increases the absorption intensity and Eg of the samples in comparison with the Free-coated samples. The Mott-Schottky analysis indicates the highest carrier concentration amount (7.67 ×10+18 cm−3) for the Au-coated samples which are deposited at 420 °C. The photodetector characteristics of the fabricated p-Si/n-Bi2S3 heterojunction devices show meaningful improvement in the quality parameters (QPs), including gain (G) and sensitivity (S). The charge transportation mechanism of the devices is discussed in detail calculating ideality factor (n), carrier mobility (µ), and trap-filled limited potential (VTFL).
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
