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Localized surface plasmon for enhanced lasing performance in solution-processed perovskites.

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    Adding silver (Ag) and polymethyl methacrylate (PMMA) thin films significantly boosts the lasing performance of organic-inorganic lead-halide perovskites. This hybrid approach reduces excitation power needs and enhances stability for practical laser devices.

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    Area of Science:

    • Materials Science
    • Optoelectronics
    • Nanotechnology

    Background:

    • Solution-processed organic-inorganic lead-halide perovskites show potential for lasing applications.
    • Enhancing perovskite lasing performance and stability remains a key challenge for practical device development.

    Purpose of the Study:

    • To investigate the effect of incorporating silver (Ag) and polymethyl methacrylate (PMMA) thin films on the lasing properties of perovskites.
    • To explore methods for reducing threshold excitation power and improving the operational stability of perovskite lasers.

    Main Methods:

    • Fabrication of hybrid perovskite thin films incorporating Ag and PMMA layers.
    • Characterization of optical and lasing properties, including threshold excitation power.
    • Assessment of perovskite stability against environmental degradation (hydrolysis).

    Main Results:

    • A significant reduction (over two orders of magnitude) in threshold excitation power for low-temperature lasing was achieved in hybrid Ag/PMMA perovskite films compared to bare layers.
    • The observed enhancement is attributed to strong exciton-plasmon coupling between the Ag nanoparticles and the perovskite.
    • The PMMA layer effectively protected the perovskite from hydrolysis, leading to long-lasting light-emitting performance.

    Conclusions:

    • The hybrid Ag/PMMA perovskite configuration demonstrates a highly promising strategy for promoting lasing performance and stability.
    • This approach significantly lowers the requirements for lasing action and improves device longevity.
    • The findings suggest strong potential for developing practical and robust perovskite-based laser devices.