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Updated: Jul 11, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Intraband spectroscopy and band offsets of colloidal II-VI core/shell structures
Anshu Pandey1, Philippe Guyot-Sionnest
1The James Franck Institute, The University of Chicago, Illinois 60637, USA.
Abstract:
The interband and intraband spectra of colloidal II-VI CdS and CdSe quantum dot cores and CdSZnSe, CdSCdSe, CdSeCdS, and CdSeZnSe core/shell systems are reported. Infrared absorption peaks between 0.5 and 0.2 eV are observed. The slope of the intraband energy versus the first interband absorption feature is characteristic of the relative band alignments of the materials constituting the core and the shell and it is analyzed within an effective mass model. The analysis provides a new estimate of the band gap of zinc blende CdSe as well as the band offsets in zinc blende and wurtzite CdSe, CdS, and ZnSe.
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