Thin-film solar module
A technology of thin-film solar energy and solar cells, applied in energy conversion devices, photovoltaic power generation, electrical components, etc., can solve problems such as large resistance loss, inapplicability, and low energy conversion efficiency
Inactive Publication Date: 2009-12-23
NAT UNIV OF SINGAPORE
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Problems solved by technology
Since the resistive loss is proportional to the square of the current, large-area solar cells have large resistive losses (and therefore low energy conversion efficiency), making them unsuitable for most applications
Method used
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[0030] The following examples provide a method for interconnecting thin film solar cells on glass (or other insulating, transparent heterogeneous material) with relatively good lateral conductivity. In particular, this method is described with regard to solar cells with p-n junctions, however, for those skilled in the art, this method can also be applied to multi-junction solar cells with appropriate modifications.
[0031] A solar cell consists of a lowly doped (or intrinsic) absorber region sandwiched between two highly doped layers of opposite polarity. Therefore, the solar cell is n + πp + type, where π represents a layer of p (positive), n (negative) or i (intrinsic) type semiconductor material. This method can be applied to n + πp + type / glass and p + πn + type / glass structure, or an equivalent structure with an insulating support that is transparent in the visible spectrum. The π layer is generally less than 10 microns thick, so compared to the p + layer and n ...
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A thin-film solar cell module and a method of interconnecting thin-film solar cells are described. The method comprises forming one or more grooves (200) in a semiconductor thin-film diode structure (202) on a superstrate (102) such that the diode structure is divided into a plurality of discrete solar cells, and such that pairs of sidewalls of the respective solar cells have a doping polarity that is the same as that of a superstrate-side semiconductor layer of the diode structure. A non-continuous insulating layer (300) is formed on the diode structure such that one sidewall of each pair of sidewalls is covered by the insulating layer while the other sidewall of each pair and one or more surface contact regions of each solar cell remain exposed. A non-continuous conductive layer (400) is formed on the diode structure such that for each pair of adjacent first and second solar cells, the exposed sidewall of the first solar cell is electrically connected to the surface contact regions of the second solar cell and remains free from electrical connection to the surface contact regions of the first solar cell.
Description
technical field [0001] The present invention generally relates to a method of interconnecting thin-film solar cells, and a thin-film solar cell module. Background technique [0002] Thin-film solar cells on a supporting heterogeneous substrate (e.g. glass) have the potential to significantly reduce the manufacturing cost of solar photovoltaic (PV) modules because they require only a part semiconductor material. Moreover, the advantage of thin-film solar cells is that it can be used on a large-area substrate (nearly 1m 2 ), which simplifies the manufacturing process and reduces the manufacturing cost. [0003] While the output current of a solar cell is proportional to the size of the device, the output voltage is not, so large areas (approximately 1m 2 ) of the solar cell has a very high current and a very low voltage. Since the resistance loss is proportional to the square of the current, a large-area solar cell has a large resistance loss (and therefore has a low energ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01L21/768H01L27/142H01L31/05H01L31/042H01L23/52H01L31/0224H01L27/04
CPCH01L27/1423Y02E10/50H01L27/1422H01L31/022466H01L31/046H01L31/0475
Inventor 堤姆斯·M·渥尔须阿密·G·亚柏
Owner NAT UNIV OF SINGAPORE