A molecular pyroelectric enabling broadband photo-pyroelectric effect towards self-driven wide spectral photodetection.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37726264.
- Also identified by DOI 10.1038/s41467-023-41523-z and PMC identifier 10509268.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Broadband spectral photoresponse has shown bright prospects for various optoelectronic devices, while fulfilling high photoactivity beyond the material bandgap is a great challenge. Here, we present a molecular pyroelectric, N-isopropylbenzylaminium trifluoroacetate (N-IBATFA), of which the broadband photo-pyroelectric effects allow for self-driven wide spectral photodetection. As a simple organic binary salt, N-IBATFA possesses a large polarization (~9.5 μC cm<sup>-2</sup>), high pyroelectric coefficient (~6.9 μC cm<sup>-2</sup> K<sup>-1</sup>) and figures-of-merits (F<sub>V</sub> = 187.9 × 10<sup>-2</sup> cm<sup>2</sup> μC<sup>-1</sup>; F<sub>D</sub> = 881.5 × 10<sup>-5 </sup>Pa<sup>-0.5</sup>) comparable to the state-of-art pyroelectric materials. Particularly, such intriguing attributes endow broadband photo-pyroelectric effect, namely, transient currents covering ultraviolet (UV, 266 nm) to near-infrared (NIR, 1950 nm) spectral regime, which breaks the restriction of its optical absorption and thus allows wide UV-NIR spectral photodetection. Our finding highlights the potential of molecular system as high-performance candidates toward self-powered wide spectral photodetection.