INTERFEROMETRIC PHOTOVOLTAIC CELL
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Abstract
Certain embodiments include interferometrically tuned photovoltaic cells wherein reflection from interfaces of layered photovoltaic devices coherently sum to produce an increased field in an active region of the photovoltaic cell where optical energy is converted into electrical energy. Such interferometrically tuned or interferometric photovoltaic devices (iPV) increase the absorption of optical energy in the active region of the interferometric photovoltaic cell and thereby increase the efficiency of the device. In various embodiments, one or more optical resonant cavities and/or optical resonant layers is included in the photovoltaic device to increase the electric field concentration and the absorption in the active region.
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Citations
590 Claims
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1-554. -554. (canceled)
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555. A photovoltaic device comprising:
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an active layer configured to produce an electrical signal between a first and a second conducting layer as a result of light absorbed by said active layer; a reflector layer disposed to reflect light transmitted through said active layer; and an optical resonance cavity between said active layer and said reflector layer, said optical resonance cavity comprising an air gap or a dielectric material and the presence of said optical resonance cavity increasing the amount of light absorbed by said active layer, the active layer being disposed on a first side of the optical resonance cavity and the first conducting layer being disposed on a second side of the optical resonance cavity, and at least one via configured to provide electrical connection between the active layer and the first conducting layer. - View Dependent Claims (556, 557, 558, 559, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590)
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Specification