Observation and enhancement through alkali metal doping of p-type conductivity in the layered oxyselenides Sr₂ZnO₂Cu₂Se₂ and Ba₂Zn_1-x O_2-x Cu₂Se₂.

ABSTRACT: The optoelectronic properties of two layered copper oxyselenide compounds, with nominal composition Sr₂ZnO₂Cu₂Se₂ and Ba₂ZnO₂Cu₂Se₂, have been investigated to determine their suitability as p-type conductors. The structure, band gaps and electrical conductivity of pristine and alkali-metal-doped samples have been determined. We find that the strontium-containing compound, Sr₂ZnO₂Cu₂Se₂, adopts the expected tetragonal Sr ₂ Mn ₃ SbO ₂ structure with I4/mmm symmetry, and has a band gap of 2.16 eV, and a room temperature conductivity of 4.8 × 10^-1 S cm^-1.

SUBMITTER: Malik Z 

PROVIDER: S-EPMC11440232 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature