A solid state light-emitting device comprising: a first electrode coupled to a first charge injecting layer; a second electrode coupled to a second charge injecting layer; an emissive layer comprising a perovskite material, wherein the emissive layer is provided between the first and second charge injecting layers; and wherein the bandgaps of the first and second charge injecting layers are larger than the bandgap of the emissive perovskite layer.

An aspect of the present disclosure is a method that includes, in a first mixture that includes a metal alkoxide and water, reacting at least a portion of the metal alkoxide and at least a portion of the water to form a second mixture that includes a solid metal oxide phase dispersed in the second mixture, applying the second mixture onto a surface of a device that includes an intervening layer adjacent to a perovskite layer such that the intervening layer is between the second mixture and perovskite layer, and treating the second mixture, such that the solid metal oxide phase is transformed to a first solid metal oxide layer such that the intervening layer is positioned between the first solid metal oxide layer and the perovskite layer.

A hole transporting material having excellent heat resistance and durability, a perovskite solar cell including the hole transporting material in a hole transporting layer, and a method for manufacturing the solar cell are provided. Provided is a perovskite solar cell having PCE which is equal to or greater than PCE in the related art because the hole transporting layer is formed by using the hole transporting material in which the phthalocyanine-based organic ligand is coordinate-bonded to metal. Also, provided is a perovskite solar cell which can maintain initial PCE for a long time in a wide temperature range when the hole transporting material is used as the hole transporting layer due to excellent heat resistance and durability.

Disclosed is an electron transport layer for a flexible perovskite solar cell. The electron transport layer includes transition metal-doped titanium dioxide particles. The titanium dioxide particles are densely packed in the electron transport layer. The electron transport layer is transparent. The use of the electron transport layer enables the fabrication of a flexible perovskite solar cell with high power conversion efficiency. Also disclosed is a flexible perovskite solar cell employing the electron transport layer.

Provided is a perovskite solar cell having remarkably excellent heat resistance, durability, and photoelectric conversion efficiency by employing a phthalocyanine derivative as a hole transport material.

A perovskite thin film and method of forming a perovskite thin film are provided. The perovskite thin film includes a substrate, a hole blocking/electron transport layer, and a sintered perovskite layer. The method of forming the perovskite solar cell includes depositing a perovskite layer onto a substrate and sintering the perovskite layer with intense pulsed light.

It discloses a perovskite optoelectronic device which includes a substrate, electrode layers and functional layers. The electrode layer is deposited on the substrate, the functional layer is deposited between the electrode layers, and the functional layer at least includes a perovskite layer, wherein the perovskite layer is a perovskite material possessing a self-organized multiple quantum well structure. By adjusting material components, controllable adjustment of the structure of the multiple quantum wells and effective energy transfer between the multiple quantum wells can be implemented, and light emitting color may be near-ultraviolet light, visible light and near-infrared light; moreover, the problems of low coverage and poor stability of the existing perovskite films can be effectively solved.

A formulation for use in the preferential formation of thin films of a perovskite material AMX 3 with a certain required crystalline structure, wherein said formulation comprises two or more compounds which between them comprise one or more first organic cations A; one or more metalcations M; one or more second cations A′; one or more first anions X and one or more second anions X′.

An aspect of the present disclosure is a method that includes exchanging at least a portion of a first cation of a perovskite solid with a second cation, where the exchanging is performed by exposing the perovskite solid to a precursor of the second cation, such that the precursor of the second cation oxidizes to form the second cation and the first cation reduces to form a precursor of the first cation.

A photoelectric conversion element including a first substrate, a first electrode on the first substrate, a photoelectric conversion layer on the first electrode, a second electrode on the photoelectric conversion layer, a second substrate on the second electrode, and a sealing member disposed between the first electrode and the second substrate and configured to seal at least the photoelectric conversion layer, the first electrode including a through section, the sealing member being in contact with the first substrate through the through section.