Doping with plasmonic materials can significantly improve the photoluminescence quantum yield (PL QY) of quantum dots. For instance, the incorporation of doped ions such as manganese (Mn²⁺) into the shell of QDs has been shown to enhance their luminescent properties while maintaining stability against environmental degradation. This increased QY is particularly beneficial for applications in imaging and sensing.
Doping quantum dots (QDs) with plasmonic core/shell structures is primarily intended to improve their optical and electrical properties via a coupling effect between the plasmonic core and quantum dot. The plasmonic core (usually a metal such as gold or silver) can amplify the local electromagnetic field near the QD, resulting in an increased fluorescence signal. Which is especially beneficial in applications that require great sensitivity, such as bioimaging and sensing. The plasmonic core's resonance frequency can be adjusted to match the QD's emission or absorption spectra, allowing for controlled energy transfer (Förster resonance energy transfer, or FRET) between the core and QD. This tunability allows for customizable emission qualities, which is useful in optoelectronics and photonic devices.
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