摘要:
Thin film PV cells and strings of such cells that may be electrically joined with conductive tabs or ribbons. A semi-flexible, electrically conductive adhesive is applied to join the tabs to the front and back of a cell, providing a conductive pathway between the tab and solar cell, with good adhesion to both. The tabs may be constructed of one or more materials having a thermal expansion coefficient that closely matches that of the substrate material of the cells, so that when the string or module is subsequently heated, mechanical stress between the tab and solar cell is minimized. The semi-flexible nature of the ECA also acts to relieve stress between the tab and the solar cell, decreasing the possibility of adhesion failure at critical locations. One or more dielectric materials may be applied to the PV cells and/or the tabs in regions where a tab crosses the edge of a cell, to avoid electrical shorting between the negative and positive electrodes of the cell.
摘要:
Thin film PV cells and strings of such cells that may be electrically joined with conductive tabs or ribbons. A semi-flexible, electrically conductive adhesive is applied to join the tabs to the front and back of a cell, providing a conductive pathway between the tab and solar cell, with good adhesion to both. The tabs may be constructed of one or more materials having a thermal expansion coefficient that closely matches that of the substrate material of the cells, so that when the string or module is subsequently heated, mechanical stress between the tab and solar cell is minimized. The semi-flexible nature of the ECA also acts to relieve stress between the tab and the solar cell, decreasing the possibility of adhesion failure at critical locations. One or more dielectric materials may be applied to the PV cells and/or the tabs in regions where a tab crosses the edge of a cell, to avoid electrical shorting between the negative and positive electrodes of the cell.
摘要:
Improved BIPV materials configured to meet various long-term requirements including, among others, a high degree of water resistance, physical durability, electrical durability, and an ability to withstand variations in temperature and other environmental conditions. In some embodiments, the disclosed BIPV materials include modules wherein two or more layers of the module are configured to be joined together during lamination to protect edge portions of the top sheet and/or back sheet of the module, such as in the vicinity of any multi-layer vapor barrier structure(s) of the module.
摘要:
Improved methods and apparatus for forming thin-film buffer layers of chalcogenide on a substrate web. Solutions containing the reactants for the buffer layer or layers may be dispensed separately to the substrate web, rather than being mixed prior to their application. The web and/or the dispensed solutions may be heated by a plurality of heating elements.
摘要:
Thin film photovoltaic cells and strings of cells that may be electrically joined in series by a conductive carrier web that underlies the positive polarity side (bottom side) of the cells. Electrical contact between the positive polarity side of a cell and the carrier web may be made through electrically conductive material such as conductive adhesive disposed between the carrier web and one or more portions of the bottom surface of each cell. Electrical contact between the negative polarity (top side) of a cell and the carrier web may be made through one or more apertures formed in the cell. An electrically conductive material may be disposed in the apertures for this purpose, in conjunction with a dielectric to line the aperture and avoid an electrical short between the opposite polarities of a given cell.
摘要:
Improved methods and apparatus for forming thin-film layers of chalcogenide on a substrate web. Solutions containing the reactants for the chalcogenide layer may be contained substantially to the front surface of the web, controlling the boundaries of the reaction and avoiding undesired deposition of chalcogenide upon the back side of the web.
摘要:
An ohmically conductive contact for a thin film p-type semiconductor compound formed of at least one of the metal elements of Class IIB of the Periodic Table of Elements and at least one of the non-metal elements of Class VIA of the Periodic Table of Elements and photovoltaic devices incorporating such contacts. An ohmic contact, according to the invention, includes a layer of conductive binder paste having mercury telluride and/or copper telluride dispersed therein. The invention also relates to a method of forming such ohmic contacts.
摘要:
Improved methods and apparatus for forming thin-film buffer layers of chalcogenide on a substrate web. Solutions containing the reactants for the buffer layer or layers may be dispensed separately to the substrate web, rather than being mixed prior to their application. The web and/or the dispensed solutions may be heated by a plurality of heating elements.
摘要:
A vapor deposition source including a crucible configured to hold a quantity of molten constituent material and at least one nozzle to pass vapor evaporated from the molten constituent material out of the crucible.
摘要:
Improved methods and apparatus for forming thin-film layers of semiconductor material absorber layers on a substrate web. According to the present teachings, a semiconductor layer may be formed in a multi-zone process whereby various layers are deposited sequentially onto a moving substrate web.