Tunable Circularly Polarized Luminescence from Inorganic Chiral Photonic Crystals Doped with Quantum Dots

Abstract

Chiral semiconductor nanostructures have received enormous attention due to their emerging circularly polarized luminescence (CPL) properties. However, compared with well-studied photoluminescence (PL), the reported CPL is much weaker and more challenging to be modulated. Herein, we describe a new approach for acquiring the intense and tunable CPL from inorganic chiral photonic crystals (CPCs) doped with semiconductor quantum dots (QDs). Unprecedentedly, the sign, position and intensity of CPL peaks can be precisely controlled by manipulating either the photonic band gap of CPCs or luminescence wavelength of QDs and a giant absolute dissymmetry factor j g lum j up to 0.25 is obtained. More importantly, the origin of the CPL modulation is clearly elucidated by both experiment and theory. This work lays the foundation for the construction of next-generation high-performance CPLbased devices.Circularly polarized luminescence (CPL) has recently received considerable attention due to its potential applications in optical displays, chiral synthesis, bio-imaging, information encryption and quantum communication. [1] Currently, CPL is commercially available through the combination of a linear polarizer and a quarter-wave plate,

Liquid crystal-templated chiral nanomaterials: from chiral plasmonics to circularly polarized luminescence

“…Thirdly, extensive efforts should be devoted to bridging the research gap from the proof-ofconcept on a laboratory scale to the large-scale synthesis of chiral functional nanomaterials and their integration into multi-material hierarchical architectures and even more complex advanced functional devices. Moreover, many other liquid-crystalline phases 324,325 , such as 2D chiral smectics and 3D blue phases, and inorganic chiral photonic crystals 326 , can be applied for the development of chiral hierarchical nanomaterials with unprecedented functionalities. Chiral metal-organic frameworks (MOFs), as an emerging class of nanoporous chiral assemblies, could be one of the preeminent chiral template candidates due to their versatile performance in combination with diverse functional nanomaterials 327 .…”

Polymer‐Based Circularly Polarized Luminescent Materials

“…[12,[22][23][24][25][26][27] On the basis of different composition, CPL materials are generally grouped into six categories: Polymers, [28][29][30][31][32][33][34][35][36] small organic molecules, [37][38][39] supramolecular assemblies, [23,[40][41][42] liquid crystals, [43][44][45] metal complexes, [46][47][48][49][50] and inorganic materials. [51][52][53] Amongst the categories, CPL materials constructed from polymers have inherent advantages. For instance, biological polymers such as DNA, proteins, and polysaccharides featuring both inherent molecular chirality and helical chirality provide rich chiral sources and elegant architectures for constructing CPL materials.…”

Six‐Pointed Star Chiral Cobalt Superstructures with Strong Antibacterial Activity

“…[7,8] Typical materials feature noble metals (Au, Pt, and Ag NPs), [9][10][11][12] transition metals (Fe, Cu, Mn, and Ni) and quantum dots. [13][14][15][16][17][18][19] However, there are some problems associated with the antibacterial strategy based on nanomaterial design. Many nano antibacterial materials cumbersome and associated with low yield.…”