Advanced Sustainable Photodetection: Systematic Fabrication and Analysis of Ag NPs/SWCNT/MWCNT Broadband Devices for Improved Environmental Monitoring

Abstract

This article elucidates a systematic fabrication and analysis procedure of Ag@SWCNT/MWCNT broadband photodetector via combined electrochemical and electro-explosion techniques. The microstructural, optical, electrical, and photoresponsive characteristics of the fabricated layers were thoroughly investigated. In detail, the optical spectra of the pronounced layers exhibited a wide-reaching absorption phenomenon along the scanned wavelength 200-800 nm. In conjunction, the fabricated devices demonstrated considerable photoresponsive parameters with higher photo-responsivity with Ag@SWCNT as compared to that using Ag@MWCNT. In detail, the addressed figure of merit delivers values of 3.3 and 0.17 A/W at wavelength of 365 nm, respectively.  values of 3.9 and 4.2 A/W were obtained for the Ag@SWCNT photodetector under illumination wavelengths of 460 and 808 nm, respectively, indicating that such values were higher compared with the value at 365 nm wavelength.  The external quantum efficiency (EQE) exhibited values of 11.09 and 0.53 at 365 nm for Ag@SWCNT and Ag@MWCNT, respectively.