Recent Progress of Chiral Perovskites: Materials, Synthesis, and Properties

Abstract

Chiral materials with intrinsic inversion‐symmetric structures possess many unique physicochemical features, including circular dichroism, circularly polarized photoluminescence, nonlinear optics, ferroelectricity, and spintronics. Halide perovskites have attracted considerable attention owing to their excellent optical and electrical properties, which are particularly suitable for realizing high power‐conversion efficiency in solar cells. Recent studies have shown that chirality can be transferred from chiral organic ligands into halide perovskites and the resultant chiral perovskites combine the advantages of both chiral materials and halide perovskites; this provides an ideal platform to design next‐generation optoelectronic and spintronic devices. In this progress report, the most recent advances are summarized in various chemical structures of chiral perovskites, their synthesis strategies, chirality generation mechanisms, and physical properties. Furthermore, the potential chiral‐halide‐perovskite‐based applications are presented and the challenges and prospects of chiral perovskites are discussed. This report outlines the diverse construction strategies of and proposes research directions for chiral halide perovskites; thus, it provides insights into the design of novel chiral perovskites and facilitates investigation of the optoelectronic applications that employ chirality.

Frontiers in circularly polarized luminescence: molecular design, self-assembly, nanomaterials, and applications

“…Recently, a switchable CPL system 27 was presented by assembling a chiral rotaxane with achiral AIEgen 9,10-distyrylanthracene unit based on the controlled motions of the chiral pillar arene macrocycles along the axle by the addition or removal of the acetate anions (Figure 7c) [63]. As a result, two CPL emission states of the chiral [3]rotaxane 27 with g lum values of ±1.36 × 10 −2 and ±2.14 × 10 −3 can be realized by adding or removing acetate anions. In addition to these applications, AIEgens have also been used…”

“…White light emissions from (a) host-guest supramolecular assembly [61] and (b) semi-crystalline polymer doped with AIEgen [62]. (c) Switchable CPL system based on AIE-active chiral [3]rotaxane with chirality transfer property [63] (color online). bly, the system of single-component achiral molecules can generate CPL via symmetry breaking to form chiral supramolecular nanostructures.…”

“…Sophisticated construction techniques for chiral nanostructures have been achieved in individual synthesis of nanocrystals [249,250], two-dimensional (2D) fabrication of either nanosheet [251] or large scale films [252,253] and 3D pyramidal [254], helical and dihedral geometrical [255] assembly of inorganic nanocrystals and so on [256,257]. Now days, the chiral inorganic nanomaterials with CPL have been drawing more and more attention owing to their huge potentials in 3D displays, information security, chiral identification, and optoelectronic devices and so on [1,3,10]. Similar to chiral inorganic nanomaterials, CPL-active inorganic materials can be classified into zero-dimensional (0D) [258] and 1D nanocrystals [259], 2D sheet and film structures [253], and 3D nanostructures, such as helical chiral inorganic nanostructures with CPL activity [166].…”

“…These advances would allow us to construct uniform and scalable homochiral systems with strong CPL signals. (3) We are still on the early stage of CPL active materials research, and rarely have demonstrated realistic applications. The CPL-related optical, electrochemical, and physicochemical properties could result in extensive applications.…”

“…Polarization is one of the inherent and important properties of light, which is very important in display, remote sensing, target identification, information storage fields and so on [1][2][3][4]. Unlike the intensity and wavelength of light, polarization has the ability to distinguish the information of light from three dimensions [5].…”