In order to improve the gain of a photovoltaic solar energy system, the system comprises: a plurality of bifacial photovoltaic solar cells, defining together a direct absorption surface as well as an indirect absorption surface, both surfaces being opposite and intended to absorb a solar radiation energy; a support chassis for supporting the cells, the chassis comprising a support structure on which the cells are attached. The chassis further includes a suspension for suspending the support structure, the suspension comprising a top end connected to a first end of the support structure, and the suspension defines a reflective surface configured to reflect light towards the indirect absorption surface defined by the cells.

The present invention discloses a method for preparing a bifacial PERC solar cell. The present invention has high photoelectric conversion efficiency, high appearance quality, and high EL yield, and could solve the problems of both scratching and undesirable deposition.

Provided are a bifacial P-type PERC solar cell, preparation method, module and system. The bifacial P-type PERC solar cell consecutively comprises a rear silver electrode (1), rear aluminum grid lines (2), a rear passivation layer (3), P-type silicon (4), an N-type emitter (5), a front silicon nitride film (6), and a front silver electrode (7); the rear silver electrode (1) is perpendicularly connected with the rear aluminum grid lines (2), grid line backbones (10) are disposed on the rear aluminum grid lines (2), an outer aluminum grid frame (9) is disposed around the rear aluminum grid lines (2), the grid line backbones (10) are connected with the rear aluminum grid lines (2), and the outer aluminum grid frame (9) is connected with the rear aluminum grid lines (2) and the rear silver electrode (1); a first laser grooving region (8) is formed in the rear passivation layer (3) with laser grooving, and the rear aluminum grid lines (2) are connected to the P-type silicon (4) via the first laser grooving region (8); the first laser grooving region (8) includes a plurality of sets of first laser grooving units (81) arranged horizontally, each of the sets of first laser grooving units (81) includes one or more first laser grooving bodies (82) arranged horizontally, and the rear aluminum grid lines (2) are perpendicular to the first laser grooving bodies (82). The solar cell is simple in structure, low in cost and easy to popularize, and has a high photoelectric conversion efficiency.

A method of producing a bifacial photovoltaic cell is disclosed herein, the method comprising: forming a boron-containing layer on a second surface of a semiconductor substrate; forming a cap layer above the boron-containing layer; effecting simultaneously: i) deposition on the first surface and ii) diffusion into it of the phosphorous using POCl.sub.3 gas phase process and iii) diffusion of the boron into the second surface of the substrate, to thereby dope the first surface with n-dopant and the second surface with boron.

Solar trackers are designed to withstand high wind loads, eventually by oversizing the structure and incurring in higher material cost and rendering high costs scenarios when deploying solar trackers in solar fields. A solar tracker and a method for operating the solar tracker yields a solution highly structured solar trackers by providing a single horizontal axis solar tracker associated to at least one bifacial photovoltaic module. The single horizontal axis solar tracker has a bifacial photovoltaic module associated to the torque tube using a joint fixture along one of the sides of the bifacial solar module so that the solar module jointly moves when the torque tube rotates. The single horizontal axis solar tracker may be operating according to the time of the day consequently to the available sunlight, so that a face of the bifacial photovoltaic module associated to the torque tube is facing the sun.

A bifacial punched PERC solar cell comprises a rear silver busbar (1), a rear aluminum finger (2), a rear passivation layer (3), a P-type silicon (4), an N-type emitter (5), a front passivation layer (6), a front silver finger (7), and a front silver busbar (8), a laser grooving region (9) is formed in the rear passivation layer by laser grooving; the rear aluminum finger line is connected to the P-type silicon via the laser grooving region, the bifacial PERC solar cell is provided with a light transmitting region (10) penetrating front and rear surfaces of the cell. A method of preparing a bifacial punched PERC solar cell and a module and a system employing the solar cell are also provided. The solar cell can be employed to increase back reflection for sunlight and significantly improve photoelectric conversion efficiency at the rear side of the cell.

A bifacial P-type PERC solar cell beneficial to sunlight absorption and a preparation method therefor are provided. The solar cell includes consecutively, from the bottom up, a rear electrode (1), a rear silicon nitride film (3), a rear alumina film (4), a P-type silicon (5), an N-type silicon (6), a front silicon nitride film (7) and a front silver electrode (8), wherein a front surface of the P-type silicon is provided with a plurality of parallel grooves (10) which are exposed to the front silicon nitride film. A length direction of a groove of the grooves is parallel to a front silver busbar electrode (81), and an inner surface of the groove is a textured surface which can receive sunlight incident from different directions and capture the sunlight through multiple reflections and incidences inside the groove. By etching a plurality of grooves in the front surface of the cell silicon wafer, the solar cell can capture more sunlight and improve the absorption rate for sunlight, thereby increasing the amount of power generated by a fixed bracket photovoltaic system for bifacial cells and a single-axis tracking photovoltaic system for bifacial cells. There is further provided a method of preparing the solar cell.

The present disclosure describes a solar system comprising a bi-facial photo-voltaic module comprising one or more solar cells disposed adjacent a transparent encapsulant, the bifacial photo-voltaic module disposed in a substantially vertical configuration relative to a horizon and a holographic optical element disposed adjacent an end of the bi-facial photo-voltaic module, the holographic optical element configured to direct incident light toward one or more surfaces of the bi-facial photo-voltaic module.

Disclosed are a double-sided solar cell and a preparation method therefor. The double-sided solar cell comprises: a silicon wafer having a PN junction, and a front first silicon oxide layer, a front second silicon oxide layer, a front first nitrogen-containing silicon compound layer, a front second nitrogen-containing silicon compound layer, and a front third silicon oxide layer that are located on one side of an N-type layer of the silicon wafer and are sequentially stacked along a direction away from the silicon wafer; and a passivation layer, a back silicon oxide layer, a back first nitrogen-containing silicon compound layer, and a back second nitrogen-containing silicon compound layer that are located on one side of a P-type layer of the silicon wafer and are sequentially stacked along the direction away from the silicon wafer.

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.