Structural and electronic features enabling delocalized charge-carriers in CuSbSe₂.

ABSTRACT: Inorganic semiconductors based on heavy pnictogen cations (Sb³⁺ and Bi³⁺) have gained significant attention as potential nontoxic and stable alternatives to lead-halide perovskites for solar cell applications. A limitation of these novel materials, which is being increasingly commonly found, is carrier localization, which substantially reduces mobilities and diffusion lengths. Herein, CuSbSe₂ is investigated and discovered to have delocalized free carriers, as shown through optical pump terahertz probe spectroscopy and temperature-dependent mobility measurements. Using a combination of theory and experiment, the critical enabling factors are found to be: 1) having a layered structure, which allows distortions to the unit cell during the propagation of an ac

SUBMITTER: Fu Y 

PROVIDER: S-EPMC11697385 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature