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

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, luminescen...

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Published inACS sustainable chemistry & engineering Vol. 8; no. 44; pp. 16469 - 16476
Main Authors Umemoto, Kazuki, Ebe, Hinako, Sato, Ryota, Enomoto, Junya, Oshita, Naoaki, Kimura, Taisei, Inose, Tomoko, Nakamura, Takahiro, Chiba, Takayuki, Asakura, Satoshi, Uji-i, Hiroshi, Masuhara, Akito
Format Journal Article
LanguageEnglish
Published American Chemical Society 09.11.2020
Subjects
color
crystallization
green chemistry
mechanochemistry
nanocrystals
photoluminescence
photons
ultrasonic treatment
PL property
lead halide perovskite
nanocrystals
ultrasounds
milling
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Summary: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.
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ISSN:2168-0485
2168-0485
DOI:10.1021/acssuschemeng.0c05171