Abstract
We combine transmission electron microscopy with electrostatic force microscopy to determine the built-in potential across individual isolated heterostructured nanorods. We observe a variation of potentials for different bicomponent nanorods, ranging from 100 to 920 mV with an average of 250 mV. Nanorods of a uniform composition with no heterojunction do not show a built-in potential, as expected. The results are particularly relevant for applications of colloidal nanocrystals in optoelectronic devices such as photovoltaics.
- Received 13 July 2010
DOI:https://doi.org/10.1103/PhysRevB.82.155311
©2010 American Physical Society