Method of making a current collecting grid for solar cells, including the steps of a) providing a continuous layer stack (1) on a substrate (8), the layer stack (1) including an upper (2) and a lower (3) conductive layer having a photoactive layer (4) interposed there between; b) selectively removing the upper conductive layer (2) and the photoactive layer (4) for obtaining a first contact hole (10) extending through the upper conductive layer (2) and photoactive layer (4) exposing the lower conductive layer (3); c) printing a front contact body (4) on the upper conductive layer (2) and a back contact body (5) in the first contact hole (10) on the lower conductive layer (3) and forming an electrically insulating first gap surrounding the back contact body (5) between the upper conductive layer (2) and the back contact body (2).

The solar cell includes a plurality of light-receiving-side finger electrodes on a light-receiving surface of a photoelectric conversion section having a semiconductor junction. The light-receiving surface of the photoelectric conversion section is covered with a first insulating layer. Each light-receiving-side finger electrodes include: a first metal seed layer provided between the photoelectric conversion section and the first insulating layer; and a first plating metal layer being conduction with the first metal seed layer through openings formed in the first insulating layer. The solar cell includes an isolated plating metal layer pieces contacting neither the light-receiving-side finger electrodes nor the back-side finger electrodes. On the surface of the first insulating layer, an isolated plating metal crowded region is present in a form of a band-shape extending parallel to an extending direction of the light-receiving-side finger electrodes.

A solar cell includes a semiconductor substrate, a bus-bar electrode, a plurality of finger electrodes, and a heavily doped layer. The semiconductor substrate has a surface. The bus-bar electrode is on the surface of the semiconductor substrate and extending along a first direction. The finger electrodes are on the surface of the semiconductor substrate and extending along a second direction. One of two ends of each of the finger electrodes is connected to the bus-bar electrode. An angle created by the first direction and the second direction is less than 180 degrees. The heavily doped layer is formed on the surface of the semiconductor substrate and includes a first portion and a plurality of second portions. The first portion is extending along the first direction. Each of the second portions is extending from the first portion along the second direction and beneath the corresponding finger electrode.

A method for manufacturing high efficiency solar cells is disclosed. The method comprises providing a thin dielectric layer and a doped polysilicon layer on the back side of a silicon substrate. Subsequently, a high quality oxide layer and a wide band gap doped semiconductor layer can both be formed on the back and front sides of the silicon substrate. A metallization process to plate metal fingers onto the doped polysilicon layer through contact openings can then be performed. The plated metal fingers can form a first metal gridline. A second metal gridline can be formed by directly plating metal to an emitter region on the back side of the silicon substrate, eliminating the need for contact openings for the second metal gridline. Among the advantages, the method for manufacture provides decreased thermal processes, decreased etching steps, increased efficiency and a simplified procedure for the manufacture of high efficiency solar cells.

A solar cell module includes an upper substrate, a lower substrate opposite the upper substrate, a solar cell panel positioned between the upper substrate and the lower substrate, the solar cell panel including a plurality of solar cells which are arranged in a matrix form and are connected to one another through a wiring member, a passivation layer configured to package the solar cell panel, a frame configured to surround an outer perimeter of the solar cell panel, a connection terminal configured to connect two adjacent strings in the solar cell panel, and a cover member configured to cover the connection terminal.

A solar cell panel includes a plurality of solar cells including first and second solar cells, and a plurality of wiring members electrically connecting the first and second solar cells. A first electrode of each of the first and second solar cells includes a first bus bar including a plurality of first pad portions. The plurality of first pad portions include a first end pad positioned on one end side of the first bus bar and on which an end of the wiring member is positioned, and a first extension pad positioned on the other end side of the first bus bar and on an extension of the wiring member. An area of the first end pad is different from an area of the first extension pad.

A photovoltaic cell array and a photovoltaic module are provided. The photovoltaic cell array includes multiple solar cells and a flexible metal conductive strip. Each solar cell includes an upper surface, upper segment electrodes, a lower surface, and lower segment electrodes. A first solar cell including a first overlap region is adjacent to a second solar cell including a second overlap region. The second overlap region, a third overlap region of the flexible metal conductive strip, and the first overlap region are sequentially stacked. The flexible metal conductive strip is welded to only one lower segment electrode and only one upper segment electrode. The lower segment electrodes of the first solar cell are outside the first overlap region, and the upper segment electrodes are outside the second overlap region.

A metal electrode structure for a solar battery and a battery assembly are provided. The structure of the metal electrode for the solar battery includes multiple main grid lines provided parallel to one another and multiple fine grid lines perpendicular to the main grid lines. Spacing between adjacent two main grid lines is defined as L, and a distance between two end points of each fine grid line is less than L. And connecting ends of adjacent two fine grid lines of the multiple fine grid lines between adjacent two main grid lines are connected to different main grid lines of the adjacent two main grid lines.

The present disclosure discloses a solar module, including solar cells, each solar cell includes a front surface and a rear surface arranged opposite to each other. The solar cell includes a semiconductor substrate and busbars located on one side of the semiconductor substrate, first electrode pads are provided at the busbars, a number of the first electrode pads ranges from 6 to 12. The solar module includes an electrode line with one end connected to the first electrode pads of the busbars on front surface of the solar cell and the other end connected to the first electrode pads of the busbars on rear surface of the adjacent solar cell. A relation between a diameter of the electrode line and a number of the busbars is 116.55x.sup.2−92.03x+27.35<y<582.75x.sup.2−425.59x+92.58, x denotes the diameter of the electrode line, and y denotes the number of the busbars.

The present disclosure discloses a solar module, including solar cells and electrode lines. Each of the solar cells includes a solar cell substrate and a plurality of busbars located on one side of the solar cell substrate. Each of the electrode lines has one end connected to the busbar on a front surface of one solar cell, and the other end connected to the busbar on a rear surface of another solar cell adjacent to the one cell sheet. First electrode pads are provided at each busbar, a number of the first electrode pads ranges from 6 to 12. A relation between a diameter of the electrode line and a number of busbars is 2.987x.sup.-1.144-1.9<y<3.2742x.sup.-1.134+1.7, where x denotes the diameter of the electrode line, and y denotes the number of busbars.