0D hybrid indium halides with highly efficient intrinsic broadband light emissions

Abstract

Two new zero-dimensional hybrid indium halides of [H2DMP]2InX7·2H2O (X = Cl, Br) display intrinsic broadband yellow-orange light emissions with the highest quantum yield of 58.53%, which exceeds those of all previously reported 0D indium halides.

Photophysical studies for Cu(i)-based halides: broad excitation bands and highly efficient single-component warm white-light-emitting diodes

“…For example, large distorted polyhedral clusters and low-dimensional structures are conducive to the formation of self-trapped excitons (STEs), while emissions from STEs accompanied by large Stokes shis tend to generate low-energy emission bands, so that large-sized organic cations are preferred in order to achieve yellow-red light emission. [28][29][30][31][32][33][34] Further, moderate structural rigidity is benecial to reduce lattice vibration and inhibit nonradiative recombination, which is conrmed in many compounds such as (EnrooH 2 ) SnCl 6 $H 2 O, 6 (C 9 H 8 N) 2 SnCl 6 , 35 etc. Therefore, to enable materials with low-energy emission as well as high PL efficiency, aromatic polyamine compounds with rigid structures are oen considered as organic cations to support the low dimensionality.…”

Intrinsic vs. extrinsic STE emission enhancement in ns2 ion doped metal (Cd, In) halide hybrids

“…Such weak broad emission in 0D In halide hybrids has been previously ascribed to STE based emission. [44][45][46][47][48][49][50][51] The PLE profile across the emission bands of the host system also vary signifying different emissive mechanisms for the high energy and low energy emission bands (Fig. 4b) for the host.…”

“…The faster decay time indicates a singlet to singlet relaxation in the host system (in contrast to the triplet to singlet relaxation for the 560 nm emission band of the host system). [44][45][46][47][48][49][50][51] Interestingly, the AEPipInSbCl doped system shows a uniform broadband emission peak centred at 560 nm across different excitation wavelengths (250-400 nm) at room temperature (Fig. 4c).…”

“…This high energy emission band (410-470 nm) present in the host and the doped system at low temperatures is assigned to the singlet STE emission from the host system. [44][45][46][47][48][49][50][51] Cumulatively, it can be inferred that excitation of the doped system occurs through dominant Sb based dopant absorption and a weaker In-halide unit based host absorption. Correspondingly, the broadband emission (B560 nm) in the doped system arises due to emission from the triplet STE states of the Sb dopant centres along with the high energy emission band (410-460 nm) at low temperatures due to singlet STE emission from the host.…”

Sn(ii)-doped one-dimensional hybrid metal halide [C5H14NO]CdCl3single crystals with broadband greenish-yellow light emission

“…Recently, low dimensional organic-inorganic hybrid materials have shown great potential in the application of optoelectronic materials [e.g., Pb(II), Sn(II), Sb(III), In(III), Bi(III), and Cu(I)]. [24][25][26][27][28][29][30][31][32] As some of the members, cadmium-based metal halide materials have also attracted the attention of researchers because cadmium-based metal halide materials can realize diverse structural types with the help of organic cations, such as 0D [CdBr 4 ] 2− , 33,34 0D [CdCl 6 ] 4− , 35 1D [CdCl 3 ] 2− , 36 1D [Cd 3 Cl 8 ] 2− , 37 [Cd 3 Cl 10 ] 4− 38 and [Cd 3 Cl 12 ] 5− clusters. 39 In the current research, cadmium-based metal halide materials are mainly used in phase change materials, nonlinear optical materials, anti-counterfeiting materials and white LED materials.…”