Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.164
Publication date: 7th February 2022
Heterojunction nanocrystals (HNCs) consisting of two or more semiconductor components contain junctions at the interface of the constituent blocks. Unlike the electronic property tuning by changing the size or shape of mono-component nanocrystal, HNCs rely on controlling energy states via band-offset engineering at the material interface. We demonstrate the usefulness of band-offsets by designing component size modulated type-II coupled quantum dots (CQDs-HNCs) composed of a fixed sized ZnSe quantum dots and size-tuned CdS quantum dots. The interface of single CQDs-HNCs is probed by using scanning tunneling microscopy (STM) at the local scale. Furthermore, we demonstrate fabrication of a differentiator using a single Cu2S-CdS HNC. The differentiator is capable for conversion of variety of waveforms demonstrating the possibility of fabrication of single HNC electronic component.
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