A device is provided. The device comprises a first stacked light emitting device. The first stacked light emitting device comprises a first electrode, a second electrode, a first emissive unit comprising a first emissive layer, a second emissive unit comprising a second emissive layer and a first charge generation layer. The first emissive unit, the second emissive unit and the first charge generation layer are all disposed between the first electrode and the second electrode. The first emissive unit is disposed over the first electrode. The first charge generation layer is disposed over the first emissive unit. The second emissive unit is disposed over the first charge generation layer. The second electrode is disposed over the second emissive unit. The first emissive unit and the second emissive are independently addressable and may emit light independently of each other. The first emissive unit emits light having a first hue classified as red, green or blue and a first chromaticity having first CIE 1931 (x, y) colour space chromaticity coordinates of (x1, y1). The second emissive unit emits light having a second hue classified as red, green or blue and a second chromaticity having second CIE 1931 (x, y) colour space chromaticity coordinates of (x2, y2). The second hue is the same as the first hue. The second chromaticity is substantially different to the first chromaticity. The first emissive layer and the second emissive layer comprise organic light emitting material, quantum dot light emitting material and/or perovskite light emitting material.

A device is provided. The device comprises a first stacked light emitting device. The first stacked light emitting device comprises a first electrode, a second electrode, a first emissive unit comprising a first emissive layer, a second emissive unit comprising a second emissive layer and a first charge generation layer. The first emissive unit, the second emissive unit and the first charge generation layer are all disposed between the first electrode and the second electrode. The first emissive unit is disposed over the first electrode. The first charge generation layer is disposed over the first emissive unit. The second emissive unit is disposed over the first charge generation layer. The second electrode is disposed over the second emissive unit. The first emissive unit and the second emissive are independently addressable and may emit light independently of each other. The first emissive unit emits light having a first hue classified as red, green or blue and a first chromaticity having first CIE 1931 (x, y) colour space chromaticity coordinates of (x1, y1). The second emissive unit emits light having a second hue classified as red, green or blue and a second chromaticity having second CIE 1931 (x, y) colour space chromaticity coordinates of (x2, y2). The second hue is the same as the first hue. The second chromaticity is substantially different to the first chromaticity. The first emissive layer and the second emissive layer comprise organic light emitting material, quantum dot light emitting material and/or perovskite light emitting material.

The present invention relates to a method for manufacturing a perovskite solar cell and a perovskite solar cell manufactured thereby and, more specifically, to a method for manufacturing a perovskite solar cell and a perovskite solar cell manufactured thereby, wherein the method comprises the steps of: (S1) applying a) an oxidative agent, b) ultraviolet light and ozone, c) oxygen plasma, or d) nitrogen dioxide gas to a hole transport layer (HTL) of a laminate in which a substrate layer, a first electrode layer, and the hole transport layer (HTL) containing a metal oxide are sequentially laminated, to oxidize the metal oxide; and (S2) sequentially laminating a perovskite layer, an electron transport layer, and a second electrode layer on the hole transport layer of the laminate.

An in-situ flash evaporation film forming apparatus for a perovskite solar cell includes a platform; a substrate disposed on the platform and configured to form a film layer; and a cavity cover movably disposed up and down on the platform, and being able to enclose the substrate into a closed cavity surrounded by the cavity cover and the platform, a vacuum pipe being disposed on the cavity cover and being able to communicate the closed cavity with a vacuum pump.

An in-situ flash evaporation film forming apparatus for a perovskite solar cell includes a platform; a substrate disposed on the platform and configured to form a film layer; and a cavity cover movably disposed up and down on the platform, and being able to enclose the substrate into a closed cavity surrounded by the cavity cover and the platform, a vacuum pipe being disposed on the cavity cover and being able to communicate the closed cavity with a vacuum pump.

A method for manufacturing a solar cell includes: forming a first photoelectric conversion part including a photoelectric conversion layer including a perovskite compound, a first transport layer, and a second transport layer; and forming a first electrode electrically connected to the first photoelectric conversion part and forming a second electrode electrically connected to the first photoelectric conversion part. The formation of the first photoelectric conversion part includes: forming a first film using a first material constituting the perovskite compound; spraying a second material constituting the perovskite compound on the first film to form a second film; performing a first heat treatment to diffuse the first film and the second film to form the perovskite compound; and performing washing to remove the residual second film residual on the perovskite compound.

A method for manufacturing a solar cell includes: forming a first photoelectric conversion part including a photoelectric conversion layer including a perovskite compound, a first transport layer, and a second transport layer; and forming a first electrode electrically connected to the first photoelectric conversion part and forming a second electrode electrically connected to the first photoelectric conversion part. The formation of the first photoelectric conversion part includes: forming a first film using a first material constituting the perovskite compound; spraying a second material constituting the perovskite compound on the first film to form a second film; performing a first heat treatment to diffuse the first film and the second film to form the perovskite compound; and performing washing to remove the residual second film residual on the perovskite compound.

A method of forming single crystal perovskite according to an exemplary embodiment of the present invention includes: forming a preliminary thin film by applying a perovskite precursor solution containing an additive on a substrate; exposing the preliminary thin film to a vacuum state by transferring the preliminary thin film to a vacuum chamber; and switching an internal pressure of the vacuum chamber to an atmospheric pressure, wherein the additive includes a substituted or unsubstituted C1 to C30 aliphatic ammonium salt, a substituted or unsubstituted C6 to C30 aromatic ammonium salt, a substituted or unsubstituted C1 to C30 aliphatic amine salt, a substituted or unsubstituted C6 to C30 aromatic amine salt, or a combination thereof.

This application provides a perovskite solar cell structurally including a transparent electrode, an electron transport layer, a perovskite layer, a hole transport layer and a second electrode in sequence, where the perovskite layer may include a main perovskite layer and a one-dimensional perovskite coating layer covering surface and periphery of the main perovskite layer, where the one-dimensional perovskite coating layer may include: a first overlay layer disposed between the main perovskite layer and the electron transport layer; and a second overlay layer disposed between the main perovskite layer and the hole transport layer.

This application provides a perovskite solar cell structurally including a transparent electrode, an electron transport layer, a perovskite layer, a hole transport layer and a second electrode in sequence, where the perovskite layer may include a main perovskite layer and a one-dimensional perovskite coating layer covering surface and periphery of the main perovskite layer, where the one-dimensional perovskite coating layer may include: a first overlay layer disposed between the main perovskite layer and the electron transport layer; and a second overlay layer disposed between the main perovskite layer and the hole transport layer.