Published January 26, 2015
| Version v1
Journal article
Optical function spectra and bandgap energy of Cu2SnSe3
Creators
- 1. National Renewable Energy Laboratory, Golden, Colorado 80401 (United States)
- 2. Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, University of Toledo, Toledo, Ohio 43606 (United States)
Description
We present the optical function spectra of Cu2SnSe3 determined from 0.30 to 6.45 eV by spectroscopic ellipsometry (SE) at room temperature. We analyze the SE data using the Tauc-Lorentz model and obtain the direct-bandgap energy of 0.49 ± 0.02 eV, which is much smaller than the previously known value of 0.84 eV for the monoclinic-phase Cu2SnSe3. We also perform density-functional theory calculations to obtain the complex dielectric function data, and the results show good agreement with the experimental spectrum. Finally, we discuss the electronic origin of the main optical structures
Additional details
Identifiers
- DOI
- 10.1063/1.4907202;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 106
- Journal Issue
- 4
- Journal Page Range
- p. 043902-043902.5
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 46121106
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- COPPER COMPOUNDS; DENSITY FUNCTIONAL METHOD; DIELECTRIC MATERIALS; ELECTRONIC STRUCTURE; ELLIPSOMETRY; MONOCLINIC LATTICES; TEMPERATURE RANGE 0273-0400 K; TIN SELENIDES
- Descriptors DEC
- CALCULATION METHODS; CHALCOGENIDES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; MATERIALS; MEASURING METHODS; SELENIDES; SELENIUM COMPOUNDS; TEMPERATURE RANGE; THREE-DIMENSIONAL LATTICES; TIN COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; VARIATIONAL METHODS
Optional Information
- Notes
- (c) 2015 AIP Publishing LLC