Single‐Component White Circularly Polarized Luminescence in Chiral 1D Double‐Chain Perovskites

Abstract

Scheme 1. Two main strategies for WCPL generation: a) Multi-component systems via physical mixing or chemical mixing; b) Single-component systems via emission mechanisms of either two-emission mechanism (LE+CT or Fl+Ph) or STE.

Establishing a Relationship between the Bandgap and the Structure in 2D Lead Halide Perovskite Semiconductors

“…Organic–inorganic hybrid perovskites have drawn surging attention as a new class of optoelectronic semiconducting materials in the past decade. − Compared with 3D counterparts, 2D layered lead halide perovskites (LHPs) have the advantages of enhanced stability under ambient conditions and structural tunability, − which enable them to be the candidates for promising applications in photoluminescence (PL), − photovoltaics, − and photodetection. − As a crucial parameter of semiconductors, the bandgap ( E g ) depends on the crystal and electronic structures. To understand and regulate optoelectronic properties of the 2D LHPs, − relationships between the E g and crystal structures should be fully clarified. − However, no quantitative relationships have been established so far between the E g and structure except for qualitative correlations.…”

“…Figure 4. Electronic structural features of 3 (top panel), 5 (middle panel), and 7 (bottom panel): (a, e, and i) band structures and density of states (DOS); (b, f, and j) out-of-plane and (c, g, and k) in-plane direction views of isosurface plots of partial charge density corresponding to the VBM; and (d, h, and l) VBM-associated partial charge density maps on the (001) plane (3 and 5) and (100) plane(7).…”

Chiral Inorganic Nanomaterials for Photo(electro)catalytic Conversion

“…This has led to chiral materials being useful for optical switches, anticounterfeiting, and polarization-based display devices. 14,15 Chiral materials also demonstrate unique biological characteristics. For instance, some cells prefer to assimilate chiral materials over achiral ones, even at a low concentration.…”

“…The dissymmetric structures of chiral materials can not only recognize the handedness of circularly polarized light (CPL) but also rotate the linearly polarized light (LPL) into CPL. This has led to chiral materials being useful for optical switches, anticounterfeiting, and polarization-based display devices. , Chiral materials also demonstrate unique biological characteristics. For instance, some cells prefer to assimilate chiral materials over achiral ones, even at a low concentration.…”

Large in-plane anisotropic 2D perovskites toward highly linear polarized light responses

“…Homochirality is a powerful tool to regulate both structures and properties of materials, and it has been proven to be effective in many fields including ferroicity, [30][31][32] circularly polarized luminescence, 33,34 and circularly polarized light detection. [35][36][37] How to improve the polarization responses through homochirality is an unexplored challenge.…”