Advancing Ag₂Se thin-film thermoelectrics via selenization-driven anisotropy control.

ABSTRACT: The debate over the optimal orientation of Ag₂Se thin films and its influence on thermoelectric performance remains ongoing. Here, we report a wet-chemical selenization-based anisotropy optimization technique to control the in-plane orientation of the Ag₂Se thin film, steering it away from (002) nearly parallel planes that hinder charge carrier mobility. This approach enables us to achieve an impressive power factor of 30.8 μW cm^-1 K^-2 at 343 K. The as-fabricated Ag₂Se thin film demonstrates remarkable durability, retaining over 90% of its power factor after six months of air exposure, and outstanding flexibility, with performance variation staying within 5% after 2000 bending cycles at a 5 mm radius. These attributes are attributed to

SUBMITTER: Cao T 

PROVIDER: S-EPMC11814352 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature