Simple Production of Highly Luminescent Organometal Halide Perovskite Nanocrystals Using Ultrasound-Assisted Bead Milling

Kazuki Umemoto, Hinako Ebe, Ryota Sato, Junya Enomoto, Naoaki Oshita, Taisei Kimura, Tomoko Inose, Takahiro Nakamura, Takayuki Chiba, Satoshi Asakura, Hiroshi Uji-I, Akito Masuhara

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)


    Owing to their excellent photoluminescence (PL) properties in a narrow linewidth below 30 nm and high photoluminescence quantum yield (PLQY), organometal halide perovskite nanocrystals (PeNCs) are promising photonic sources for wide-color gamut displays. However, with a top-down approach, luminescent PeNCs comparable to those prepared through bottom-up synthesis is still a significant subject, including the optimization of milling processes. Herein, we propose a novel and simple ultrasound-assisted bead milling process based on the characteristics of facile crystallization. During the milling process, irradiated ultrasounds disperse milling beads that facilitate an intense collision between the beads and the perovskite precursors. Thus, this bead milling can be easily performed without planetary ball milling, and it provides brightly luminescent colloidal PeNCs with high PLQY. We established that mechanochemical conditions significantly enhance the optical properties by exploring various milling conditions. Furthermore, the color adjustment can be realized by changing the halide composition. Therefore, this novel milling process has great potential and versatility for preparing diverse perovskite nanomaterials for optoelectronic applications.

    Original languageEnglish
    Pages (from-to)16469-16476
    Number of pages8
    JournalACS Sustainable Chemistry and Engineering
    Issue number44
    Publication statusPublished - 2020 Nov 9


    • PL property
    • lead halide perovskite
    • milling
    • nanocrystals
    • ultrasounds

    ASJC Scopus subject areas

    • Chemistry(all)
    • Environmental Chemistry
    • Chemical Engineering(all)
    • Renewable Energy, Sustainability and the Environment


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