A solar battery cell, comprises a substrate; a first electrode provided on the substrate; a photoelectric conversion layer provided on the first electrode; a second electrode provided on the photoelectric conversion layer; and a barrier layer so provided as to cover a side portion of the photoelectric conversion layer, wherein the photoelectric conversion layer has an electron transport layer, a light absorption layer provided on the electron transport layer, and a hole transport layer provided on the light absorption layer, the light absorption layer includes a compound having a perovskite crystal structure, and the barrier layer is a dense inorganic material layer.

A photovoltaic device includes one or more features that taken alone or in combination enhance its efficiency. Some embodiments may comprise a tandem solar device in which a top PV cell is fabricated upon a front transparent substrate, that also serves as the top encapsulating substance. The top PV cell including the front encapsulating substance is then bonded (e.g., using adhesive) to a bottom PV cell in order to complete the tandem device. Using the same transparent, insulating element as both front encapsulating substance and a substrate for fabricating the top PV cell, obviates to the need to provide a separate structure (with resulting interfaces) to perform the latter role. For tandem and non-tandem PV devices, a Through-Substrate-Via (TSV) structure may extend through an insulating substrate in order to provide contact with an opposite side (e.g., back electrode). Embodiments may find particular use in fabricating shingled perovskite photovoltaic solar cells.

The present disclosure relates to a composition that includes a material of at least one of a perovskite structure, a perovskite-like structure, and/or a perovskitoid structure, where the material includes an isotope of an element, the isotope has more neutrons than protons, and the isotope is incorporated into the perovskite structure, the perovskite-like structure, and/or the perovskitoid structure. In some embodiments of the present disclosure, the isotope may make up between greater than 0% and 100% of the element.

A dye-sensitized solar panel includes a titanium nanoparticle layer and a plant-derived photo-sensitizer supported on the titanium nanoparticle layer. The photo-sensitizer can be extracted from chard (the cicla cultivar group of B. vulgaris subsp. cicla), and the titanium nanoparticle layer includes titanium nanoparticles synthesized using henna (Lawsonia inermis). The titanium nanoparticle layer can, in addition to titanium nanoparticles, include zinc oxide nanoparticles.

The electrolyte includes one or more salts and a silane. The silane has a silicon linked to one or more first substituents that each include a poly(alkylene oxide) moiety or a cyclic carbonate moiety. The silane can be linked to four of the first substituents. Alternately, the silane can be linked to the one or more first substituents and one or more second substituents that each exclude both a poly(alkylene oxide) moiety and a cyclic carbonate moiety.

The invention provides a suitable method and an appropriate, PV film structure. This aim is achieved by a room temperature method in which aqueous dispersions are printed onto a substrate and cured by an accompanying reaction. The accompanying reaction forms gradients and also nanoscale structures at the film boundaries, which produce a PV active film having standard performance and a higher stability. At around 10% efficiency, stability and no initial loss in performance in the climatic chamber test can be obtained and over a 20 year test period, consistently less fluctuation can be achieved. The method is free from tempering or sintering steps, enables the use of technically pure, advantageous starting materials and makes the PV film structure available as a finished, highly flexible cell for a fraction of the typical investment in production or distribution.

A method of fabricating a large-area perovskite film includes steps of: providing a precursor solution on a conductive substrate to form a film, wherein the perovskite is represented by a formula of ABX.sub.3, and the solutes of the precursor solution at least comprises A, B and X; and applying an anti-solvent or Infrared light on the film. The fabrication methods of a large-area perovskite film and a perovskite solar cell or module are also disclosed.

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.

An object of the present invention is to provide a solar cell that is excellent in photoelectric conversion efficiency, suffers little degradation during encapsulation (initial degradation), has high-temperature durability, and is excellent in temperature cycle resistance. The present invention provides a solar cell including: a laminate having an electrode, a counter electrode, and a photoelectric conversion layer disposed between the electrode and the counter electrode; and an encapsulation material covering the counter electrode to encapsulate the laminate, the photoelectric conversion layer including an organic-inorganic perovskite compound represented by the formula: R-M-X.sub.3, R representing an organic molecule, M representing a metal atom, X representing a halogen atom or a chalcogen atom, the encapsulation material including a (meth)acrylic resin having a C atom/O atom ratio of 4 or more in the molecule.

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′.