A Facile Synthesis for Studying the Effect of Molar Concentration on Structural, Morphological and Optical Behaviour of MoO3 Thin Films using Jet Nebulizer Spray Pyrolysis Technique for n-MoO3/p-Si Photodiode Application

Abstract

In this study, molybdenum trioxide (MoO₃) thin films were coated with various Mo concentrations 1, 2, 3 and 4 wt.% referred as L1, L2, L3 and L4 respectively on to the silica substrate calcined at 450 ºC by a facile, rapid cost-effective and a custom-made jet nebulizer spray pyrolysis (JNSP) technique. The concentration impact on the structural, morphological and compositional parameters were examined by XRD, FESEM, EDX, FTIR and Raman studies. The XRD peaks confirmed the presence of the orthorhombic phase of MoO₃ (α-MoO₃) in the prepared films. FESEM images depicted their nanorod structured morphology. EDX spectra confirm the presence of elements such as oxygen (O) and molybdenum (Mo). Molecular fingerprint of the samples were diagnosed by probing their molecular vibrations through the Raman Spectroscopy. Vibrational frequencies of the bonds in the samples was investigated by FTIR. The I-V measurements were analyzed in light and dark conditions for the n-MoO₃/p-Si junction diode.