An arrangement includes a solar cell and a covering, wherein the covering covers the solar cell, at least on the side that is intended to be exposed to electromagnetic radiation of the sun. The covering has an electrochromic layer. The arrangement also has a control unit for controlling the electrochromic layer. The control unit is designed to control the transmittance of the electrochromic layer for electromagnetic radiation in a defined wavelength range by applying an electrical voltage to the electrochromic layer.

A monolithic solar cell includes a first solar cell that is a sequential stack of an electrode, a silicon substrate, and an n-type emitter layer; a recombination layer disposed on the n-type emitter layer; an interfacial layer that is a double layer constituted of PEDOT:PSS and poly-TPD or PEDOT:PSS and PCDTBT, and that is disposed on the recombination layer; and a second solar cell that includes a p-type hole selective layer and a perovskite layer disposed on the p-type hole selective layer, the a p-type hole selective layer contacting and being integrated onto the interfacial layer of the first solar cell in a heat treatment during which the interfacial layer is partially decomposed, wherein the presence of the interfacial layer prevents a reduction in photoelectric conversion efficiency that occurs if the first solar cell and the second solar cell are combined without the presence of the interfacial layer.

A photovoltaic device includes a first group of photovoltaic cells of a first cell type, the first group of photovoltaic cells operable to produce a first current and a first voltage, and a second group of photovoltaic cells of a second cell type that is different than the first cell type, the second group of photovoltaic cells operable to produce a second current and a second voltage. A first power electronics unit is connected to the first group of photovoltaic cells, and a second power electronics unit is connected to the second group of photovoltaic cells. The second power electronics unit is separate from and not communicating with the first power electronics unit. A control device is operable to vary a first property of the first power electronics unit to vary the first current and the first voltage and to vary a second property of the second power electronics unit to vary the second voltage and the second current independent of the first voltage and the first current.

A tandem photovoltaic device includes a silicon photovoltaic cell having a silicon layer, a perovskite photovoltaic cell having a perovskite layer, and an intermediate layer between a rear side of the perovskite photovoltaic cell and a front (sunward) side of the silicon photovoltaic cell. The front side of the silicon layer has a textured surface, with a peak-to-valley height of structures in the textured surface of less than 1 μm or less than 2 μm. The textured surface is planarized by the intermediate layer or a layer of the perovskite photovoltaic cell. Forming the tandem photovoltaic device includes texturing a silicon containing layer of a silicon photovoltaic cell and operatively coupling a perovskite photovoltaic cell comprising a perovskite layer to the silicon photovoltaic cell, thereby forming a tandem photovoltaic device and planarizing the textured surface of the silicon containing layer of the silicon photovoltaic cell.

In one aspect, window inserts are described herein, which can modulate transmission of electromagnetic radiation through a window and can be self-powered. In some embodiments, a window insert comprises a photovoltaic device, the photovoltaic device including a photosensitive layer having peak absorption between 250 nm and 450 nm and an average transmittance of at least 50 percent in the visible region of the electromagnetic spectrum.

The present disclosure relates to a device that includes a first layer that includes at least one of a semiconducting material, a hole transport material (HTM), and/or an electron transport material (ETM), a second layer, and a third layer that includes a material that is at least one of transparent or conductive, where the second layer is positioned between the first layer and the third layer, the first layer, the second layer, and the third layer are in electrical contact with each other, and the third layer has a first thickness between greater than zero nm and about 100 nm. In some embodiments of the present disclosure, the semiconducting material may include a perovskite.

A solid junction-type photoelectric conversion element (10) including a first conductive layer (2), an electric power generation layer (4), and a second conductive layer (6), which are laminated in this order, wherein the electric power generation layer (4) comprises: a perovskite compound represented by a composition formula ABX.sub.3, formed of an organic cation A, a metal cation B and a halide anion X, and a compound Z having no perovskite structure.

A photovoltaic device including a photovoltaic cell and method of use is disclosed. The photovoltaic cell includes at least a first photovoltaic layer and a second photovoltaic layer arranged in a stack. The first photovoltaic layer has a first thickness and receives light at its top surface. A second photovoltaic layer has a second thickness and is disposed beneath the first photovoltaic layer and receives light passing through the first photovoltaic layer. The first thickness and the second thickness are selected so that a first light absorption at the first photovoltaic layer is equal to a second light absorption at the second photovoltaic layer. The photovoltaic cell is irradiated at its top surface with monochromatic light to generate a current.

Organic photovoltaic cells (OPVs) and their compositions are described herein. In one or more embodiments, the acceptor with an active layer of an OPV includes is a non-fullerene acceptor. Such non-fullerene acceptors may provide improved OPV performance characteristics such as improved power conversion efficiency, open circuit voltage, fill factor, short circuit current, and/or external quantum efficiency. One example of a non-fullerene acceptor is (4,4,10,10-tetrakis(4-hexylphenyl)-5,11-(2-ethylhexyloxy)-4,10-dihydro-dithienyl[1,2-b:4,5b′] benzodi-thiophene-2,8-diyl) bis(2-(3-oxo-2,3-dihydroinden-5,6-dichloro-1-ylidene) malononitrile.

A solar cell module of the embodiment includes a first solar cell element and a second solar cell element disposed to be aligned, a connection member, and a shield member. The connection member electrically connects a first electrode of the first solar cell element and a second electrode of the second solar cell element. The first solar cell element and the second solar cell element each include a first cell containing a perovskite semiconductor and a second cell containing silicon. The first electrode is disposed at an end portion in a first direction in which the first cell is disposed in a thickness direction. The second electrode is disposed at an end portion in a second direction in which the second cell is disposed in the thickness direction. The shield member is made of an electrically insulating material and is disposed between an end portion of the first electrode of the first solar cell element on the second solar cell element side and the connection member.