Large area, low voltage, high current photovoltaic modules and method of fabricating same
AssigneeEnergy Conversion Devices, Inc.
InventorsPrem Nath, Timothy Laarman, Craig Vogeli, Kenneth Whelan, Bernard Kelly
Life of this patent
Estimating the term…
Abstract
A large area, high current, low voltage photovoltaic module including a common bottom electrode upon which a means adapted to collect and transport photogenerated current is disposed. By electrically interconnecting a plurality of said large area modules in series, the voltage obtained therefrom can be added so as to obtain any desired voltage output therefrom.
Claims39
A method of fabricating a large area, high current, low voltage photovoltaic module, said photovoltaic module including:
- a common, conductive lower electrode;
- a photovoltaic body formed by a plurality of superposed, continuous layers of semiconductor alloy material deposited atop the electrode;
- and a continuous, transparent, electrically conductive, upper electrode deposited atop the photovoltaic body;
- the method including the sequential or non-sequential steps of:
- providing a common, conductive lower electrode;
- depositing the photovoltaic body on said lower electrode;
- depositing the transparent conductive upper electrode on said body;
- passivating short circuit defects in the semiconductor alloy material from which said body is fabricated;
- said passivating step operative to alter the stoichiometry of the transparent conductive electrode to a higher electrical resistivity form in the regions proximate said defects;
- providing means adapted to collect and transport photogenerated current to positive and negative module terminals;
- forming a positive module terminal;
- forming a negative module terminal;
- and
- connecting said collection and transporting means to said positive and negative terminals, whereby the large area photovoltaic body is electrically connected so as to photogenerate a high current and low voltage output when exposed to incident radiation.
A large area, high current, low voltage photovoltaic module including:
- a common, conductive lower electrode;
- a photovoltaic body formed by a plurality of superposed, continuous layers of semiconductor alloy material deposited atop said electrode;
- a continuous transparent, electrically conductive, upper electrode deposited atop said photovoltaic body;
- the stoichiometry of the transparent conductive electrode altered to a higher resistivity form in those regions proximate defects in the photovoltaic body;
- means adapted to collect and transport photogenerated current to positive and negative module terminals;
- a positive module terminal electrically connected to said transparent conductive upper electrode;
- and
- a negative module terminal electrically connected to the common lower electrode.
Dependencies are inferred from the claim text.