| 摘要 |
A device and a method for its fabrication. The device may include a first surface, a second surface to receive light into the device, a first photovoltaic cell between the first surface and the second surface, and a second photovoltaic cell between the first surface and the second surface. The first photovoltaic cell includes a first region of a first photovoltaic material exhibiting an excess of a first type of charge carrier and a second region of the first photovoltaic material exhibiting an excess of a second type of charge carrier, and the second photovoltaic cell includes a first region of a second photovoltaic material exhibiting an excess of the first type of charge carrier and a second region of the second photovoltaic material exhibiting an excess of the second type of charge carrier. A first contact is electrically connected to the second region of the first photovoltaic material, a second contact is electrically connected to the first region of the first photovoltaic material, and a third contact is electrically connected to the first region of the second photovoltaic material. The first surface is between at least a portion of the first contact and the second region of the first photovoltaic material, and the first surface is between at least a portion of the second contact and the second region of the first photovoltaic material.
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