The present invention relates to a method for manufacturing a photovoltaic device comprising: —forming a porous first conducting layer on one side of a porous insulating substrate, —coating the first conducting layer with a layer of grains of a doped semiconducting material to form a structure, —performing a first heat treatment of the structure to bond the grains to the first conducting layer, —forming electrically insulating layers on surfaces of the first conducting layer, —forming a second conducting layer on an opposite side of the porous insulating substrate, —applying a charge conducting material onto the surfaces of the grains, inside pores of the first conducting layer, and inside pores of the insulating substrate, and—electrically connecting the charge conducting material to the second conducting layer.

A method of forming a wavelength detector that includes forming a first transparent material layer having a uniform thickness on a first mirror structure, and forming an active element layer including a plurality of nanomaterial sections and electrodes in an alternating sequence atop the first transparent material layer. A second transparent material layer is formed having a plurality of different thickness portions atop the active element layer, wherein each thickness portion correlates to at least one of the plurality of nanomaterials. A second mirror structure is formed on the second transparent material layer.

A method of forming a wavelength detector that includes forming a first transparent material layer having a uniform thickness on a first mirror structure, and forming an active element layer including a plurality of nanomaterial sections and electrodes in an alternating sequence atop the first transparent material layer. A second transparent material layer is formed having a plurality of different thickness portions atop the active element layer, wherein each thickness portion correlates to at least one of the plurality of nanomaterials. A second mirror structure is formed on the second transparent material layer.

A method for preparing a mesoscopic solar cell based on perovskite light absorption materials, the method including 1) preparing a hole blocking layer on a conductive substrate; 2) preparing and sintering a mesoporous nanocrystalline layer, an insulation separating layer, and a hole collecting layer on the hole blocking layer in order; and 3) drop-coating a precursor solution on the hole collecting layer, and allowing the precursor solution to penetrate pores of the mesoporous nanocrystalline layer via the hole collecting layer from top to bottom, and drying a resulting product to obtain a mesoscopic solar cell.

A method for preparing a mesoscopic solar cell based on perovskite light absorption materials, the method including 1) preparing a hole blocking layer on a conductive substrate; 2) preparing and sintering a mesoporous nanocrystalline layer, an insulation separating layer, and a hole collecting layer on the hole blocking layer in order; and 3) drop-coating a precursor solution on the hole collecting layer, and allowing the precursor solution to penetrate pores of the mesoporous nanocrystalline layer via the hole collecting layer from top to bottom, and drying a resulting product to obtain a mesoscopic solar cell.

Disclosed herein is a quantum dot composite that can maintain luminous efficiency per unit quantum dot even when a quantum dot concentration is high, and therefore can achieve a high emission intensity. The quantum dot composite includes: a matrix; and quantum dots dispersed in the matrix, wherein the matrix is composed of cellulose acetate having a compositional distribution index (CDI) of 3.0 or less, and a concentration of the quantum dots is 0.05 wt % or higher.

Disclosed herein is a quantum dot composite that can maintain luminous efficiency per unit quantum dot even when a quantum dot concentration is high, and therefore can achieve a high emission intensity. The quantum dot composite includes: a matrix; and quantum dots dispersed in the matrix, wherein the matrix is composed of cellulose acetate having a compositional distribution index (CDI) of 3.0 or less, and a concentration of the quantum dots is 0.05 wt % or higher.

Disclosed is a photodiode, which includes a graphene-silicon quantum dot hybrid structure, having improved optical and electrical characteristics by controlling the sizes of silicon quantum dots and the doping concentration of graphene. The photodiode including the graphene-silicon quantum dot hybrid structure of the present disclosure may be easily manufactured, may be manufactured over a large area, has a wide photodetection band from the ultraviolet light region to the near infrared region, and allows selective absorption energy control.

A method for forming a photovoltaic device includes forming an absorber layer with a granular structure on a conductive layer; conformally depositing an insulating protection layer over the absorber layer to fill in between grains of the absorber layer; and planarizing the protection layer and the absorber layer. A buffer layer is formed on the absorber layer, and a top transparent conductor layer is deposited over the buffer layer.

A solar charging apparatus is disclosed that includes an article of apparel that is capable of conformably fitting to a body part of a wearer, the article of apparel having a longitudinal dimension and a transversal dimension. The apparatus includes a power source that is coupleable to an interior portion of the article of apparel. The power source is connected to an output connector that is configured to charge a portable electronic device that is separate from the article of apparel. The apparatus includes a plurality of crystalline solar cells for recharging the power source, wherein the plurality of crystalline solar cells curves to conform to the article of apparel.