Spectroelectrochemistry and photoelectrochemistry of electrodeposited ZnO nanorods

VÁZQUEZ, CECILIA I.; BENAVENTE LLORENTE, VICTORIA; ZANOTTO, FRANCO M.; BARUZZI, ANA M.; IGLESIAS, RODRIGO A.

Electrochemical Science Advances

Wiley-VCH GmbH

Año: 2021 vol. 2 p. 1 - 10

2698-5977

The electrodeposition of nanostructured semiconductors with tunable propertiesis of vital importance to develop optoelectronic devices. In this work, weintroduce a novel synthesis protocol involving a multiple pulse electrodepositionnucleation stage combined with conventional potentiostatic ZnO nanorodgrowth in a nitrate bath. The in-situ nucleation step allowed a higher surfacedensity of ZnO nanorods. The effect of potential and total charge transferredduring the nanorod growth was also systematically studied. Besides, spectroelectrochemicalproperties of different diameter electrodeposited ZnO nanorodswere compared. Electrochemical Burstein-Moss shiftwas observed for the differentdiameter ZnO nanorods when the potential was modified. Finally, spectroelectrochemicalmeasurements of small diameter (≈60 nm) ZnO nanorods werecarried out under different conditions, for example, electrolyte composition andamount of dissolved O2, to establish how these parameters affect the Burstein-Moss shift.