SOLAR CELL USING QUANTUM DOTS AND METHOD OF FABRICATING SAME

摘要

An efficient solar cell and method of fabricating the same is disclosed. The solar cell includes an n-doped substrate layer. A p-doped buffer layer is disposed on the n-doped substrate layer. A quantum dot absorber stack is disposed on the buffer layer. The absorber stack includes at least one quantum dot layer and one p-doped spacer layer. A p-doped cap layer is disposed on the quantum dot absorber layer. The thickness of the quantum dot layer is less than an electron diffusion length from the depletion region formed by the n-doped substrate layer and the p-doped buffer layer. The quantum dot absorber layer allows for additional photo currents from two-photon absorption from the p-doped cap layer being exposed to a light source.

主权项

1. A solar cell comprising:
an n-doped substrate layer; a p-doped buffer layer disposed on the n-doped substrate layer; a quantum dot absorber stack disposed on the buffer layer, the quantum dot absorber stack including at least one quantum dot layer having quantum dots and one spacer layer; a p-doped cap layer is disposed on the quantum dot absorber stack, the p-doped cap layer exposed to a light source; and wherein the thickness of the quantum dot absorber stack is within an electron diffusion length from a depletion region formed by the n-doped substrate layer and the p-doped buffer layer.