Work

Charge carrier absorption in n-type Sb2Se3

Year: 2024

Type: article

Abstract: The optical and electrical properties of n-type chlorine-doped Sb2Se3 single crystals, with free carrier concentrations above 1016 cm−3 at room temperature, have been studied. The experiments reveal a strongly polarized temperature-dependent long-wavelength infrared absorption attributable to conduction band electrons within the material. For wavelengths between 1.6 and 6 μm, the room temperature absorption varies as λ2.5±0.3, suggesting that longitudinal optical mode scattering is the dominant electron scattering mechanism. The results are most consistent with the hypothesis that electron transport in Sb2Se3 is band-like and not intrinsically limited by small-polaron self-trapping.

Source: Applied Physics Letters

DOI: 10.1063/5.0222193

Authors: F. Herklotz, E. V. Lavrov, T. D. C. Hobson, J. D. Major, K. Durose

Institutions: Technische Universität Dresden, University of Liverpool

Language: English

Topic: Advanced Semiconductor Detectors and Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: Deutsche Forschungsgemeinschaft, Engineering and Physical Sciences Research Council

Awards: G3839914230, Bandgap engineering for optimal antimony chalcogenide solar cells, G6123411490, Overcoming the grain size limit to Voc in sustainable photovoltaics, G8566118833