Journal
NANO ENERGY
Volume 77, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105043
Keywords
Strongly-ligated perovskite quantum dots; Controlled dimensions and architectures; Meniscus-assisted self-assembly; CsPbBr3; White LEDs
Categories
Funding
- AFOSR [FA9550-19-1-0317]
- NSF [CMMI 1727313, 1914713, CBET 1803495, ECCS 1914562]
- National Natural Science Foundation of China [21922503]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1914713] Funding Source: National Science Foundation
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Despite impressive advances in the synthesis of perovskite quantum dots (PQDs), the ability to craft PQDs of the same dimension yet different architectures (e.g., solid vs. hollow) remains a grand challenge. Moreover, precise control over the architectures and assemblies of PQDs renders new optical and optoelectronic properties. Herein, we report on a robust amphiphilic star-like block copolymer nanoreactor strategy to rapidly create monodisperse solid and hollow PQDs of the same external diameter in-situ. The dimension of PQDs can be readily regulated by utilizing star-like copolymers. Compared to solid PQDs, as the inner diameter of hollow PQDs increases, their photoluminescence progressively blue-shifts. Moreover, stripe patterns of PQDs can be conveniently formed via meniscus-assisted self-assembly (MASA) and subsequently anion-exchanged to yield multi-colored stripes with a heterostructured transition zone. Conceptually, an array of PQDs including all inorganic lead-free and organic-inorganic PQDs, can be easily accessed for applications in lasers, LEDs, and solar cells.
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