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Published on: August 2, 2019
Effects of quantum confinement on the conduction band minimum of semiconductors
Roby Cherian1, Abhinav Kumar, Priya Mahadevan
1Unit for Nanoscience and Technology and Advanced Materials Research Unit, S.N. Bose National Centre for Basic Sciences, JD Block, Sector 111, Salt Lake, Kolkata 700098, India.
Abstract:
A scheme has been devised to determine the shifts of the conduction band minimum of semiconductors as a function of size from ab-initio calculations. The method has been applied to CdSe as well as GaAs and the shifts determined. A monotonic decrease is found as a function of particle size, as expected. However, the most unusual aspect of our result is that the conduction band bottom approaches bulk-like values for the largest CdSe particles that we have studied here in contrast to expectations from other theories.
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