Abstract
In the present study, a combination of a hydrothermal route and a topotaxialconversion reaction has been used to grow a cadmium sulfide–copper sulfide (CdS–CuxS) single nanorodheterojunction. The J–V characteristics of the CdS nanorods show Shockley behaviour consistent with theenergy band diagram of the platinum conducting atomic force microscope (CAFM)probe–CdS nanorod combination. The photovoltaic response measured on the CdS–CuxS nanorods using a CAFM probe shows the formation of a heterojunctionwith an open circuit voltage of 320 mV, a short circuit current density of5.5 mA cm − 2 and a crossover ofdark and light J–V curves related to the photoconductivity of the interfacial CdS layer. The lengthwiseheterojunction fabricated in the present study has many potential advantages incomparison to other single nanorod junctions.
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