ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Optical Properties and Electronic Structure of Copper Zinc Sulfide Nanocrystals

Mukherjee, A and Bhattacharyya, B and Rajasekar, GP and Narayan, A and Pandey, A (2021) Optical Properties and Electronic Structure of Copper Zinc Sulfide Nanocrystals. In: Journal of Physical Chemistry C .

[img] PDF
jou_phy_che_125-32_17890-17896_2021.pdf - Published Version
Restricted to Registered users only

Download (2MB) | Request a copy
[img] PDF
acs.jpcc.1c05664.pdf - Published Supplemental Material
Restricted to Registered users only

Download (2MB) | Request a copy
Official URL: https://doi.org/10.1021/acs.jpcc.1c05664


Continued efforts to transition toward renewable energy sources have spurred tremendous research into the discovery of near-infrared gap semiconductors. Here we describe the optical properties and electronic structure of copper zinc sulfide nanocrystals, with copper mole fractions as high as xCu = 0.18. Copper zinc sulfide is shown to be a near-infrared gap semiconductor that exists in both zinc blende and wurtzite forms, similar to ZnS. The bandgap is shown to vary over 3.45-2.15 eV as the copper mole fraction is changed from 0.01 to 0.18. We find that the valence band of CuZnS nanocrystals has a significant tendency for hole localization, similar to other highly mismatched alloys. Further, our ultrafast studies are consistent with rapid (450 ± 60 fs) removal of conduction band electrons and subsequent defect emission over 4.3 ns. © 2021 American Chemical Society.

Item Type: Journal Article
Publication: Journal of Physical Chemistry C
Publisher: American Chemical Society
Additional Information: The copyright for this article belongs to American Chemical Society
Keywords: Copper compounds; Electronic structure; II-VI semiconductors; Infrared devices; Nanocrystalline alloys; Nanocrystals; Optical properties; Renewable energy resources; Sulfur compounds; Wide band gap semiconductors, Conduction band electrons; Defect emission; Hole localization; Mole fraction; Near Infrared; Renewable energy source; Ultra-fast; Zinc blende, Zinc sulfide
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 03 Dec 2021 07:03
Last Modified: 03 Dec 2021 07:03
URI: http://eprints.iisc.ac.in/id/eprint/70113

Actions (login required)

View Item View Item