Simple Production of Highly Luminescent Organometal Halide Perovskite Nanocrystals Using Ultrasound-Assisted Bead Milling
Simple Production of Highly Luminescent Organometal Halide Perovskite Nanocrystals Using Ultrasound-Assisted Bead Milling
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DOI：
10.1021/acssuschemeng.0c05171
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发表时间：
2020-11-09
影响因子：
8.4
通讯作者：
Masuhara, Akito
中科院分区：
文献类型：
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作者：
Umemoto, Kazuki;Ebe, Hinako;Masuhara, Akito
有机金属卤化物钙钛矿纳米晶（PeNCs）具有优异的光致发光（PL）特性和高的光致发光量子产率（PLQY），是一种很有前途的宽色域显示光子源。然而，使用自上而下的方法，与通过自下而上合成制备的那些发光PeNCs相当的发光PeNCs仍然是一个重要的课题，包括研磨过程的优化。在此，我们提出了一种新的和简单的超声辅助珠磨工艺的基础上，易于结晶的特点。在研磨过程中，辐照的超声波分散研磨珠，促进珠和钙钛矿前体之间的强烈碰撞。因此，该珠磨可以在没有行星式球磨的情况下容易地进行，并且其提供具有高PLQY的明亮发光的胶体PeNCs。我们建立了机械化学条件显着提高光学性能，通过探索各种研磨条件。此外，可以通过改变卤化物组成来实现颜色调节。因此，这种新颖的研磨工艺具有制备用于光电应用的各种钙钛矿纳米材料的巨大潜力和通用性。
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.