A method for producing a solar cell is described, in which a plurality of doped regions are to be etched-back selectively or over their entire surface. Once a semiconductor substrate (1) has been provided, various doped regions (3, 5) are formed in partial regions of a surface of the semiconductor substrate, the various doped regions (3, 5) differing as regards their doping concentration and/or their doping polarity. The various doped regions (3, 5) are then purposively etched-back in order to achieve desired doping profiles, and finally electrical contacts (21) are formed at least at some of the doped regions (3, 5). The etching-back of the various doped regions takes place in a common etching operation in an etching medium. In order that such common etching-back of various doped regions (3, 5) is possible, it is proposed purposively to adjust both properties of the initially unetched doped regions (3, 5) and parameters that influence the etching operation with regard to properties of the desired doping profiles within the etched doped regions.

Disclosed is method of manufacturing a solar cell including forming a barrier film over at least one surface of a semiconductor substrate or a semiconductor layer, forming a first conductive area on the at least one surface of the semiconductor substrate or the semiconductor layer via ion implantation of a first conductive dopant through the barrier film, and removing the barrier film.

A wet etching method for an N-type bifacial cell including: (1) providing an N-type silicon wafer, proceeding with surface structuralization on the N-type silicon wafer, and producing a PN junction on a surface of the N-type silicon wafer by using a boron diffusion technique; (2) proceeding with a first mixed acid washing, etching the PN junction on an edge and a back surface of the N-type silicon wafer; (3) proceeding with a first pure water washing and a first alkaline washing, removing residual acid solution from the surface of the N-type silicon wafer; (4) proceeding with a second pure water washing and a second mixed acid washing, removing residual impurities from the surface of the N-type silicon wafer; (5) proceeding with a third pure water washing and air drying; and (6) after air drying, completing etching on the N-type bifacial cell.

A solar energy system for use with tufted geosynthetics on a substantially flat surface having a racking structure with bases and attachments for frictional seating to a tufted geosynthetic ground cover system, a bifacial solar panel mounted to the racking system and electrically connected to a connection box for communicating electrical current to an electricity power conditioner of an electrical current grid generated upon exposure of the solar panel to ambient light. A method of using a solar energy system with tufted geosynthetics cover system is disclosed.

The present invention relates to a device (1) for the use of concentrating radiant energy onto a receiver (2). The device comprises a first concentrator (5) that is filled with a transmissible material for the use of increasing the acceptance angle of the concentrator and concentrating the radiant energy onto a bifacial receiver (2). Embodiments also comprise a second concentrator (4) that directs the concentrated radiant energy to both sides of the bifacial receiver, whereby the second concentrator enables the device to use a substantially smaller receiver. In some embodiments, the receivers comprise photovoltaic (PV) cells.

A solar cell system and a flexible solar panel are disclosed herein. The solar cell system includes a glass housing, a set of rows of solar cells each defining a front side and a rear side and arranged within the glass housing. The solar cell system can also include a reflective element disposed in the glass housing and facing the rear side of the set of rows of solar cells and a first terminal coupled to a first end of the set of rows of solar cells, traversing through and sealed against the first end of the glass housing. The solar cell system can be configured with other solar cell systems into the flexible solar panel that is deployable in a wide range of potential applications.

A bifacial solar cell includes a silicon substrate; an emitter layer; a plurality of first electrodes locally on the emitter layer; a first aluminum oxide layer on the emitter layer; a first silicon oxide layer between the first aluminum oxide layer and the emitter layer; a first anti-reflection layer on the first aluminum oxide layer; a back surface field layer on the silicon substrate; a second aluminum oxide layer on the silicon substrate; a second silicon oxide layer between the second aluminum oxide layer and the silicon substrate; a second anti-reflection layer on the second aluminum oxide layer; and a plurality of second electrodes respectively on the back surface field layers through the second anti-reflection layer, the second aluminum oxide layer and the second silicon oxide layer.

A process for manufacturing a bifacial photovoltaic cell, comprising the steps: coating a substrate with a boron containing layer; forming a cap layer over the boron containing layer which is on the second surface of the substrate; removing the boron containing layer from the surfaces of the substrate which are not covered with a cap layer; effecting the deposition of a phosphorous containing layer on the surfaces of the substrate which are not covered by the cap layer, and effecting diffusion of the phosphorous and the boron into the substrate; removing the phosphorous containing layer; texturing the substrate where there is no cap layer; effecting the deposition of a phosphorous containing layer on the first surface of the substrate and effecting diffusion of phosphorous into the substrate to form a second n-doped layer; and forming a passivating and/or antireflective coating layer covering the n-doped layer on the substrate's first surface.

Various embodiments of mounting structures for solar photovoltaic (PV) modules and methods for constructing such mounting structures are described. A mounting structure is usable to secure PV modules in portrait orientation or landscape orientation. PV modules are secured to PV module support rails, which may be secured to purlins of a mounting structure using clamps. In some embodiments, self-adhesive grounding patches are used to establish electrical grounding paths in various embodiments of mounting structure.

A solar cell system and a flexible solar panel are disclosed herein. The solar cell system includes a glass housing, a set of rows of solar cells each defining a front side and a rear side and arranged within the glass housing. The solar cell system can also include a reflective element disposed in the glass housing and facing the rear side of the set of rows of solar cells and a first terminal coupled to a first end of the set of rows of solar cells, traversing through and sealed against the first end of the glass housing. The solar cell system can be configured with other solar cell systems into the flexible solar panel that is deployable in a wide range of potential applications.