Lead halide perovskite for efficient optoacoustic conversion and application toward high-resolution ultrasound imaging.

ABSTRACT: Lead halide perovskites have exhibited excellent performance in solar cells, LEDs and detectors. Thermal properties of perovskites, such as heat capacity and thermal conductivity, have rarely been studied and corresponding devices have barely been explored. Considering the high absorption coefficient (10⁴~10⁵ cm^-1), low specific heat capacity (296-326 J kg^-1 K^-1) and small thermal diffusion coefficient (0.145 mm² s^-1), herein we showcase the successful use of perovskite in optoacoustic transducers. The theoretically calculated phonon spectrum shows that the overlap of optical phonons and acoustic phonons leads to the up-conversion of acoustic phonons, and thus results in experimentally measured low thermal diffusi

SUBMITTER: Du X 

PROVIDER: S-EPMC8184828 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature