Highly Crystalline CsPbBr₃ Perovskite Nanoparticles for Liquid Crystal Displays

Abstract

Synthesis of CsPbBr 3 nanocrystals (NCs) in the nonpolar solvent at room temperature has made great progress in recent years. However, most of strategies require the use of toluene, which is severely against their large-scale production in future commercialization due to the toxicity concerns. Here, we propose a facile and environmentally friendly strategy to synthesize CsPbBr 3 NCs by using n-hexane as the solvent for the first time. Didecyldimethylammonium bromide (DD 10 AB) can well passivate NCs by the strong bonding of DDA + with the NC surface, thus improving the colloidal stability. CsPbBr 3 NCs with DD 10 AB posttreatment not only exhibit a narrow emission (FWHM ≈ 17.0 nm) with an ultrahigh PLQY of 96% but also maintain an orthorhombic structure and bright luminescence after 120 days of storage in air. Employing a DD 10 AB-CsPbBr 3 film, a high-performance LCD displays the color gamut of 131% NTSC and 95% Rec.2020, indicating a great potential in the application field of liquid crystal display in the future.

Er‐Doped MgAl2O4 Nanofilms Enabling Highly Efficient Near‐Infrared Electroluminescence from the Silicon‐Based MOS Devices Fabricated by Atomic Layer Deposition

“…[56] The corresponding EQEs, PEs, and Er 3+ doping concentrations of silicon-based EL devices using different oxides that have been reported in the literature are listed in Table S2 (Supporting Information). [9,47,[52][53][54][57][58][59][60][61][62][63][64][65][66][67][68] In comparison with other oxide matrix materials, the EL performance of MAO:Er devices in this work exhibits obviously higher EQE and PE than most of other results, second only to the amorphous Ga 2 O 3 :Er devices in our previous report, supplying a potential luminescent material for light amplification and even light sources in lasers.…”

CsPbBr3 Nanorod Luminescent Property Study

“…The unique properties and potential applications of the CsPbBr 3 nanorod have generated significant interest among researchers. First, due to their characteristics of emitting linearly polarized light, , NRs can be utilized as materials for liquid crystal displays. − Second, NRs can serve as quantum light sources . Additionally, highly stable NRs have been found suitable for fluorescence labeling. − The luminescent properties of CsPbBr 3 NRs influence their applications in various fields.…”

Tunable Optoelectronic Properties of CsPbBr3 Perovskite Nanocrystals for Photodetectors Applications

“…Nanocrystals (NCs) of metal halide perovskite materials, with an ABX 3 structure (where A is a monovalent cation such as CH 3 NH 3 + , CH­(NH 2 ) + , C 6 H 5 CH 2 CH 2 NH 3 + , Cs + , or Rb + ; B is a divalent metal such as Pb 2+ , Ge 2+ or Sn 2+ ; and X is a halide such as Cl – , Br – , or I – ) have attracted significant attention in many fields due to their unique set of properties, which include excellent free carrier migration capability, high photoluminescence quantum yields (PLQY), narrow emission spectra, and wide and tunable emission covering the full visible range. − These outstanding optoelectronic properties make them a potential candidate for use in various technological utilities, including liquid crystal displays, − light-emitting diodes, − solar concentrators, − and photodetectors. − Among them, lead halide perovskite NCs have become increasingly attractive in recent years due to their defect-tolerant nature, which results in high carrier mobility and efficient charge transport . Therefore, they have shown tremendous potential for a variety of optoelectronic applications, through chemical and structural modification .…”