Achieving High Responsivity and Detectivity in a Quantum-Dot-in-Perovskite Photodetector.
basic_science · Level V
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- Record sourced from PubMed, PMID 36753056.
- Also identified by DOI 10.1021/acs.nanolett.2c04144.
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Abstract
This work reports on quantum dots (QDs) in perovskite photodetectors showing high optoelectronic performance via quantum-dot-assisted charge transmission. The self-powered broad-band photodetector constructed with SnS QDs in FAPb<sub>0.5</sub>Sn<sub>0.5</sub>I<sub>3</sub> perovskite can capture incoming optical signals directly at zero bias. The QDs-in-perovskite photodetector exhibits a high sensitivity in the wavelength range from 300 to 1000 nm. Its responsivity at 850 nm reaches 521.7 mA W<sup>-1</sup>, and a high specific detectivity of 2.57 × 10<sup>12</sup> jones can be achieved, which is well beyond the level of previous self-powered broad-band photodetectors. The capability of quantum-dot-in-perovskite photodetectors as data receivers has been further demonstrated in a visible-light communication application.