Observation of ultraviolet photothermoelectric bipolar impulse in gallium-based heterostructure nanowires.

ABSTRACT: The incorporation of thermal dynamics alongside conventional optoelectronic principles holds immense promise for advancing technology. Here, we introduce a GaON/GaN heterostructure-nanowire ultraviolet electrochemical cell of observing a photothermoelectric bipolar impulse characteristic. By leveraging the distinct thermoelectric properties of GaON/GaN, rapid generation of hot carriers establishes bidirectional instantaneous gradients in concentration and temperature within the nanoscale heterostructure via light on/off modulation. The thermoelectromotive force induced by these gradients, combined with the type-II heterojunction band structure, facilitates carrier transport, resulting in transient bidirectional photothermal currents. The device achieves exceptional responsivity (17.1 mA/W)

SUBMITTER: Zhu J 

PROVIDER: S-EPMC11782623 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature