Partially transparent solar panel
A technology of solar panels and panels, applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of expensive environment, harmfulness, etc., and achieve the effect of meeting aesthetic requirements
Inactive Publication Date: 2011-02-09
M SOLV LTD
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Problems solved by technology
Selective etching of opaque layers using photolithography, which is slow, expensive and environmentally harmful
Method used
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[0095] figure 1
[0096] figure 1 A simple method of forming rows of holes in an opaque coating on a solar panel 11 is shown. In this case, the laser beam 12 is focused by a fixed lens 13 on the panel surface, which is continuously moved in the X direction, while the laser emits, to form a single row of holes 14 . After completing a row, step the panel in the Y direction to form another row of holes parallel to the first row of holes. This process is repeated until the entire panel area or a desired portion of the panel area is covered with holes.
[0097] figure 2
[0098] figure 2 The use of a single stationary biaxial scanner unit 21 with a lens 22 to form rows of holes 23 in a continuously moving panel 24 is shown. In this case, one axis of motion of the scanner unit is used to move the beam in the X direction, creating a row of holes that in the shown case only extends over part of the width of the panel. The second axis of motion of the scanner unit is used...
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Abstract
A method is described for forming a partially transparent thin film solar panel by providing an array of unconnected holes in an opaque layer of the panel the holes being sufficiently small so that they are not discernable to the human eye and the light transparency factor caused by the holes being selectively controlled so that it can be graded in two dimensions by varying the size and / or spacing of the holes. A thin film solar panel with an opaque layer which is made partially transparent by providing an array of unconnected holes therein, the holes being sufficiently small so that they arenot discernable to the human eye and the light transparency factor caused by the holes being graded in one or two dimensions by variations in the size and / or spacing of the holes is also described together with a laser ablation tool for forming such a panel, the tool comprising a laser, a scanner for scanning a laser beam relative to the panel, focussing means for focussing the laser beam on the opaque layer and control means for selectively controlling the laser repetition rate, the scanning speed, the pulse energy and / or the focussing of the laser beam whereby the light transparency factor caused by the holes can be graded in two dimensions by varying the size and / or spacing of the holes.
Description
technical field [0001] The present invention relates to partially transparent solar panels and methods and laser ablation devices for producing such panels. Background technique [0002] For many years, lasers have been used to scribe and remove the thin layers used in solar panels to form and interconnect individual subcells and isolate edge areas. Conventional manufacturing methods for solar panels based on thin film materials include the following steps: [0003] a) Depositing a thin layer of bottom electrode material over the entire substrate surface. The substrate is usually glass, but may also be a polymer sheet. The bottom layer is usually a transparent conductive oxide such as tin oxide, zinc oxide or indium tin oxide (ITO). [0004] b) Laser scribing parallel lines across the panel surface, typically at 5 to 10 mm intervals, across the entire electrode layer to divide the continuous film into mutually electrically isolated regions. [0005] c) Depositing the pow...
Claims
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IPC IPC(8): H01L31/20B23K26/36
CPCY02E10/52B23K26/0626B23K26/381H01L31/208B23K26/4075Y02B10/12B23K26/4065B23K26/40B23K26/382B23K2103/42B23K2103/50H01L31/0468Y02E10/50Y02P70/50
Inventor P·T·拉姆斯拜
Owner M SOLV LTD