| Autor: |
Singh A; Advanced Nanomaterials Research Laboratory, U.G.C. Centre of Advanced Studies, Department of Physics, University of Allahabad, Prayagraj-211002, UP, India. anshikasingh@allduniv.ac.in., Chauhan P; Advanced Nanomaterials Research Laboratory, U.G.C. Centre of Advanced Studies, Department of Physics, University of Allahabad, Prayagraj-211002, UP, India. anshikasingh@allduniv.ac.in., Verma A; Nanomaterials and Sensors Research Laboratory, Department of Physics, Babasaheb Bhimrao Ambedkar University, Lucknow-226025, UP, India., Yadav BC; Nanomaterials and Sensors Research Laboratory, Department of Physics, Babasaheb Bhimrao Ambedkar University, Lucknow-226025, UP, India. |
| Abstrakt: |
In this study, an enhanced photoresponse was observed in the Mn-Co Nanoferrites (MCFs)-Polyaniline (PANI) nanohybrid architecture due to the formation of interface between PANI and MCFs, which provided a conduction pathway for the movement of charge carriers, and these interfaces were observed in a high-resolution transmission electron micrograph (HR-TEM). X-ray photoelectron spectroscopy (XPS) suggests that the carbon (C 1s) of the MCF-PANI nanohybrid shows peaks at 287.80 eV for CO, 286.17 eV for C-O, 285.24 eV for C-N, 284.50 eV for the sp 3 hybridized carbon (C-C/C-H) and 283.84 eV for the sp 2 hybridized carbon (CC). Current-voltage ( I - V ) curves reveal an ohmic nature of the MCF-PANI nanohybrid photodetector device. The photoresponse measurements were analyzed using the trap depth concept, demonstrating that the conductive polymer increases the photoconduction mechanism efficiency of MCFs. The constructed photodetector device exhibits a high photoresponsivity of 22.69 A W -1 , a remarkable detectivity of 1.36 × 10 12 cm Hz 1/2 W -1 and a fast rise/decay time of 0.7/0.8 s. The excellent performance of the as-fabricated photodetector device could be explained by the intimate interaction between MCFs and PANI at their interface. |
