Abstract
Perovskite nanocrystals have attracted worldwide attention due to their outstanding optical versatility, high photoluminescence quantum yields, and facile synthesis. In this review, we firstly revisit the synthetic methods for perovskite nanocrystals (PNCs), including hot injection, anion exchange, solvothermal reaction, etc. In the meantime, we discuss effects of the different synthetic methods on the properties of PNCs, including the crystal size, emission spectral feature, quantum yield, etc., followed by several optimizing strategies. Finally, lasing and display applications of these PNCs in combination with liquid crystal materials are discussed thoroughly. Outlooks on the challenges and opportunities of these nanocrystalline materials in terms of adjunct applications with liquid crystals have been presented at the end, which are highly promising for next-generation light emission applications.
Highlights
The term “perovskite” comes from German mineralogist Gustav Rose, who stumbled upon the mineral CaTiO3 in The Urals of Russia and named it perovskite in honor of the Russian mineralogist Lev A
This review is composed of a first revisit of the synthetic methods for hybrid organoinorganic perovskites (HOIPs) and all inorganic perovskites (AIPs) nanocrystals [including solvothermal synthesis, anion exchange, hot injection, ultrasonication, etc., followed by the doping and toxicity modification methods of perovskite nanocrystals (NCs)] and the prospective of a perovskite:liquid crystal composite for future display/lasering/lighting applications
By dispersing laser dyes into the Liquid crystals (LCs) matrix, or building a nanostructure composed of laser dyes and LCs, and adjusting the photonic band gap (PBG) to match the PBG edge overlaps with the emission spectrum of the dyes to maximize the coupling effect, a dye-doped liquid crystal laser can be prepared (Coles and Morris, 2010)
Summary
The term “perovskite” comes from German mineralogist Gustav Rose, who stumbled upon the mineral CaTiO3 in The Urals of Russia and named it perovskite in honor of the Russian mineralogist Lev A. When CLCs present a planar arrangement structure, that is, the direction of the spiral axis of the crystals is perpendicular to the glass substrate, Bragg reflection will occur (Zola et al, 2019) Based on this optical property, some applications like liquid crystal display As there is a growing number of researches on PQDs’ display/lasering/lighting applications (Liang et al, 2019), here, we revisit the ongoing researches on PQD materials in terms of their chemistry in synthesis and applied physics in multiple emission applications in conjunction with LCs. Briefly, this review is composed of a first revisit of the synthetic methods for HOIP and AIP nanocrystals [including solvothermal synthesis, anion exchange, hot injection, ultrasonication, etc., followed by the doping and toxicity modification methods of perovskite nanocrystals (NCs)] and the prospective of a perovskite:liquid crystal composite for future display/lasering/lighting applications
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