Abstract
Glancing angle deposition technique was carried out to synthesize silver (Ag) nanoparticles (NPs) on titanium dioxide (TiO2) thin film (TF) over n-type Si substrate. The presence of Ag NPs on the TiO2 TF enhanced the photoconduction as compared to bare TiO2 TF. The maximum photosensitivity of the Ag NPs/TiO2 TF (plasmonic) device was recorded ∼700 times than that of the bare TiO2 TF at −3 V. The devices were UV sensitive and maximum internal gain for the plasmonic device was calculated to be ∼210 at 380 nm. The inversion capacitance of the plasmonic devices responded with a.c. signal efficiently as compared to bare TiO2 TF. Under applied sweeping top electrode voltage Vs ±10 V, the corresponding maximum memory window of 4.5 V was observed for plasmonic device in its capacitance (C)–voltage (V) curve. The Ag NPs-patterned TiO2 TF device possessed higher impedance than that of the bare TiO2 TF-based device.
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