Transition metal complex dye-sensitized 3D iodoplumbates: syntheses, structures and photoelectric properties

Abstract

The first types of transition metal complex cationic dye-sensitized 3D hybrid porous iodoplumbates exhibiting outstanding visible light-driven photoelectric properties.

Broadband White-Light Emission in One-Dimensional Organic–Inorganic Hybrid Silver Halide

“…In the past several decades, inorganic and organic hybrid metal halides as an emerging new class of functional materials have attracted extensive attentions with advantages of abundant structural types, high PLQEs, facile syntheses and tunable band gaps spanning the entire visible spectrum. − Especially the hybrid lead halide perovskites have been adopted as effective illuminants and substantial low-dimensional phases are reported to exhibit broadband white-light emissions derived from the self-trapped excitons (STE) states due to the strong electron–phonon coupling effects. − Despite of the remarkable progress of white-light emission in lead halide perovskites, the environmental and biological toxicities of lead seriously hinder their extensive applications in solid LEDs. Hence, it is still challenging to explore new types of hybrid lead-free metal halide LEDs with single-component white-light emission.…”

Bulk Assembly of Multicomponent Zero-Dimensional Metal Halides with Dual Emission

“…Organic metal halide hybrids have recently emerged as an important class of solid-state photoactive materials. Synthetic control of the topology of metal halides has enabled this class of materials to possess three- (3D), two- (2D), one- (1D), and zero-dimensional (0D) structures at the molecular level. − In 0D organic metal halide hybrids or bulk assemblies of 0D metal halides, individual metal halide molecular/cluster species are isolated from each other by wide bandgap (HOMO–LUMO) organic moieties to form a perfect “host–guest” structure. − Since our discovery of 0D (C 4 N 2 H 14 X) 4 SnX 6 (X = Br or I), a number of bulk assemblies of 0D metal halides have been developed as highly efficient light emitters with PLQEs of up to near unity. 0D organic metal halide hybrid structures could also accommodate various types of metal halide species/clusters in a single crystal with periodically embedded metal halide species independent of each other.…”

Mild Hydrothermal Synthesis of the Complex Hafnium-Containing Fluorides Cs2[M(H2O)6][Hf2F12] (M = Ni, Co, Zn), CuHfF6(H2O)4, and Cs2Hf3Mn3F20 Based on HfF7 and HfF6 Coordination Polyhedra

“…For example, the luminescent properties of hafnium-based alkali fluorides, Li 2 HfF 6 , Na 5 Hf 2 F 13 , K 3 HfOF 5 and K 2 Hf 3 OF 12 , depend on a variety of factors including the alkali cation size, the presence or absence of oxygen in the compound, and the coordination environment of the hafnium atoms . Similar effects have been observed in inorganic hybrid materials containing transition-metal complex cations that exhibit efficient photocatalytic activity. − Hafnium halides, such as Cs 2 HfCl 6 and Rb 2 HfCl 6 , exhibit a remarkable structural versatility, are promising materials for a number of optical applications, and have been shown to exhibit intrinsic luminescence along with excellent scintillation properties. − Kang and Biswas have investigated hafnium chlorides and employed quantum chemistry calculations to demonstrate that the absorption and luminescence processes are highly dependent on the [HfCl 6 ] 2– charge-transfer transition . It is possible that similar processes could exist in [HfF 6 ] 2– units.…”