Aspects of the present disclosure generally relate to short-wave infrared materials and to processes for making short-wave infrared materials. In an aspect, a composition is provided that includes: a nitrogen-containing compound or ion thereof; and a Pb-free double perovskite material. The composition can be utilized as a short-wave infrared material. The perovskite materials described herein and compositions thereof show improved stability and can be fabricated at lower costs.

Disclosed are a light-emitting device and a method of manufacturing the same. The light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode and including a quantum dot including a first ligand bonded to a surface thereof; and a charge transport layer including an inorganic nanoparticle including a second ligand bonded to a surface thereof, wherein an interface between the emission layer and the charge transport layer includes a cross-link in which the first ligand on the surface of the quantum dot and the second ligand on the surface of the inorganic nanoparticle are linked by a cross-linking agent.

Provided herein are adsorption materials comprising a metal-organic framework comprising metal ions of metals, a plurality of organic linkers and one or more modulator where each modulator forms a localized defect. Each organic linker in the plurality of organic linkers creates a bridge between metal ions. Each modulator is connected to only one metal chain. The adsorption material further comprises one or more ligands. Each ligand in the plurality of ligands can be an amine or other Lewis base (electron donor) appended to a metal ion of the metal-organic framework.

The present disclosure provides a quantum dot ligand, a quantum dot-ligand system and a quantum dot material, belonging to the field of display technology. The quantum dot ligand includes an X group, a Y group and a Z group. The Y group is configured to provide at least two binding sites, among which at least one binding site is configured to bind with the X group, and the remaining binding site is configured to bind with the Z group. The X group is a coordination group configured to form a coordination bond with a surface of a quantum dot. The Z group is a saturated 3- to 5-membered heterocyclic group containing O or S.

Europium doped tin perovskites useful in the fabrication of optoelectronic devices exhibiting improved stability and high-power conversion efficiencies and perovskite precursor solutions used to prepare the europium doped tin perovskite, wherein the europium doped tin perovskite can be represented by Formula 1:
(A.sup.+)(Sn.sup.2+)(X.sup.).sub.3.Math.m[(Eu.sup.2+)(Y.sup.).sub.2]1 wherein m is 0.001-0.05; X.sup. for each instance is independently F.sup., Cl.sup., Br.sup., or I.sup.; Y.sup. for each instance is independently F.sup., Cl.sup., Br.sup., or I.sup.; and A.sup.+ is Cs.sup.+, Rb.sup.+, CH.sub.3NH.sub.3.sup.+, CH.sub.3CH.sub.2NH.sub.3.sup.+, H(CNH.sub.2)NH.sub.2.sup.+, Me(CNH.sub.2)NH.sub.2.sup.+, or a mixture thereof.

Semiconductor thin films and rapid methods of fabrication can include mixed cations created through recrystalization.

A high throughput method of synthesizing and characterizing a multiplicity of ternary compositions is provided, the method comprising: selecting three components; depositing a gradient of a first component along a first axis; depositing a gradient of a second component along a second axis which is normal to the first axis, such that the gradient is thickest at a first end and thinnest at a second end; and depositing a gradient of a third component along the second axis such that the gradient is thickest at the second end and thinnest at the first end to provide a compositional distribution of the multiplicity of ternary compositions; mapping the compositional distribution of each of the multiplicity of ternary compositions; and analyzing each of the multiplicity of ternary compositions, thereby synthesizing and characterizing the multiplicity of ternary compositions.

The present disclosure provides a perovskite solar cell and a manufacturing method. The method includes: providing a substrate; forming a functional layer on the substrate; forming a perovskite crystal in the functional layer; providing a postprocessing solution including a solvent and an isocyanates compound; applying the postprocessing solution to the perovskite crystal, and maintaining the postprocessing solution for a predetermined time period under a predetermined condition, so as to remove the solvent for complete reaction. According to the present disclosure, it is able to optimize the performance of the perovskite solar cell and improve the photoelectric conversion efficiency.