Upright-Standing SnO2 Nanosheets Glazed CdSe Nanocrystallites: High Photocurrent Generating Photoelectrochemical Cells

Abstract

Efficient charge separation in photoelectrochemical cell composed of solution-processed SnO2 nanosheets (NSs)-CdSe nanocrystallites (NCs), is investigated. The SnO2 NSs decorated with CdSe NCs, confirmed from the structural elucidation and morphological evolution studies, electrode exhibited 16.40 mA/cm(2) and 2.70% short circuit current density and power conversion efficiency which were superior to pristine CdSe nanowires-based electrode (9.44 mA/cm(2), 1.44%). This increment was caused by relatively smaller recombination losses followed by higher electron life time and was well-supported from the photoluminescence, incident photon-to-current efficiency and electrochemical impedance spectroscopy measurements.