Photovoltaic cell
AssigneeAsulab S.A.
InventorsEric Saurer, Michael Gratzel, Tobias Meyer
Life of this patent
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Abstract
The invention relates to a photovoltaic cell (1) comprising a substrate (2) having a support face (4) having a first electrode (6) thereon and a second electrode (10) spaced from the first electrode (6) by a plurality of layers (14, 16; 14, 24, 16) including at least one layer (14) of a semiconducting material with an active junction (J) interface thereat, said active junction (J) having a developed surface area greater than its projected surface area.
Claims40
A photovoltaic cell comprising a substrate having a support face having disposed thereon a first electrode and a second electrode separated from the first electrode by a plurality of layers comprising at least a first layer of a semiconducting material with an active junction at an interface thereof, said active junction having a developed surface area greater than its projected surface area, said first electrode comprising a uniform layer formed of a conducting material and a porous layer formed of conducting colloidal particles, which has a developed surface area greater than its projected surface area and on which the other layers and said second electrode are disposed successively, and said first layer of semiconducting material having a thickness less than or equal to half the width of the pores of said porous layer.
A photovoltaic cell comprising a substrate having a support face having disposed thereon a first electrode and a second electrode separated from the first electrode by a plurality of layers comprising at least a first layer of a semiconducting material with an active junction at an interface thereof, said active junction having a developed surface area greater than its projected surface area, said first layer of semiconducting material comprising a porous layer formed of colloidal particles and having a developed surface area greater than its projected surface area and a uniform layer covering said porous layer and on which the other layers and said second electrode are disposed successively, and said colloidal particles having a diameter smaller than the diffusion length of minority charge carriers created in said porous layer by the absorption of light.
Dependencies are inferred from the claim text.