S7-N5: SnO2 colloidal nanoparticles based ultraviolet photodetector with high signal to noise ratio

SnO₂ nanoparticles possess optical and electrical properties that make them suitable for the fabrication of UV photodetectors. This paper presents the material fabrication and characterization followed by the device fabrication and characterization of a SnO₂ colloidal nanoparticles based ultraviolet photodetector. The fabricated detector exhibits a high signal to noise ratio of 5.8 × 10³ low dark current of 1.4 nA, responsivity of 307 mA/W, rise time of 16 s and fall time of 5.4 s. The study demonstrates SnO₂ as a favorable material for the development of future optoelectronic devices.