6results about How to "Improve light trapping" patented technology

The invention relates to the photovoltaic field, and provides a back contact battery and a manufacturing method thereof, a laminated battery and a photovoltaic module, and the back contact battery comprises a battery substrate which is provided with a first surface and a second surface which are opposite to each other; the isolating membrane is positioned on the first surface; the isolating membrane comprises at least two isolating units, the surface, far away from the first surface, of each isolating unit comprises a first area and a second area surrounding the first area, each isolating unit comprises a first part located in the first area and a second part located in the second area, the first part is provided with a groove sunken towards the battery substrate, and the edge, far away from the first part, of the second part is fluctuant; and an electrode on the second surface. The invention is at least beneficial to improving the light absorption and utilization rate of the back contact cell by means of the isolating membrane.

This disclosure relates to the field of solar cell manufacturing technology, and discloses a method for fabricating a solar cell and the solar cell itself. The fabrication method includes: providing a substrate layer with a first textured surface; forming an anti-reflection passivation layer on the surface of the substrate layer, the anti-reflection passivation layer conformally covering the first textured surface; laser-treating the anti-reflection passivation layer to form a second textured surface, the second textured surface including multiple micro-recesses; and forming a repair passivation layer on the laser-treated surface of the anti-reflection passivation layer to repair laser damage introduced by the laser treatment, the repair passivation layer conformally covering the second textured surface. This disclosure can ensure the passivation effect of the cell while improving the light-trapping effect of the cell surface.

The invention provides a three-terminal laminated solar cell based on a silicon nanowire structure, and relates to the technical field of solar cells. A first electrode layer is arranged in the perovskite top cell in the direction facing the incident light, a second electrode layer and a third electrode layer are arranged in the crystalline silicon bottom cell in the direction deviating from the incident light, and a plurality of nanowire structures are arranged on one side, facing the incident light, of an N-type silicon absorption layer at intervals. The nanowire structure can enhance coupling and propagation of long-wave photons to the N-type silicon absorption layer through a waveguide effect and a light field modulation effect, and the nanowire structure presents a sub-wavelength optical characteristic, so that an anti-reflection effect in a wide spectrum range is realized, and the absorption efficiency of the crystal silicon bottom cell on the long-wave photons is improved. In addition, by arranging a three-electrode structure, the overall energy output performance of the battery is improved.

The present disclosure relates to the technical field of solar cell, and particularly relates to a rounded reagent and a photovoltaic cell and a preparation method thereof. A textured pyramid structure is arranged on a poly removal area of the photovoltaic cell, and the top angle of the top of the pyramid and the bottom angle of the bottom of the pyramid are both rounded. The photovoltaic cell has excellent passivation performance and a double-sided rate simultaneously.

The invention relates to a solar cell and a photovoltaic module, and the solar cell comprises a silicon substrate, a first semiconductor layer and a second semiconductor layer. The silicon substrate comprises a first region, a second region, a platform region and a slope region; the first semiconductor layer is deposited on the first area, the platform area and the slope area in a conformal manner; the second semiconductor layer is deposited on the second region in a shape follow-up manner; the slope area is located between the first area and the platform area; the electrical properties of the first semiconductor layer and the second semiconductor layer are different; the platform area is provided with a texture structure, the slope area is provided with a plurality of vertical textures and a plurality of arc-shaped textures, and the arc-shaped textures are overlaid on the vertical textures. According to the scheme, the light trapping effect of the solar cell can be improved, and the adhesive force of a subsequently deposited structural layer is enhanced. In addition, the arc-shaped textures are overlapped on the vertical textures, and the structure can block the etching paste, so that the excessive expansion of the etching paste is avoided.

The application relates to the technical field of solar cells, and provides a back contact cell, a cell assembly and a photovoltaic system. A first polarity region of the back contact cell is stacked with a first tunneling layer and a first doped layer. The first tunneling layer comprises a first nitride layer. A plurality of holes are formed on the first tunneling layer. The surface of the first polarity region is a rough surface. The first polarity region has a plurality of first pyramid structures. The first pyramid structure has a first tower base inclined surface. The first tower base inclined surface comprises a first region, a second region and a third region arranged in sequence along the direction from the bottom of the first pyramid structure to the top of the first pyramid structure. The second region is located between the first region and the third region. The hole density of the part of the first tunneling layer located on the third region is greater than the hole density of the part of the first tunneling layer located on the second region. In this way, the Auger recombination loss increase in the body region can be reduced, the collection efficiency of carriers can be improved, and the defects in the silicon substrate can be reduced.