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US 2010/0059119 A1Published application
Solar cell and method of manufacturing the same
AssigneeElectronics and Telecommunications Research Institute
InventorsSun Jin YUN, JungWook LIM, Sang Hoon KIM, Hyun Tak KIM
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Abstract
Provided are a solar cell and a method of manufacturing the same. The solar cell includes a substrate; and a light-absorbing layer formed below the substrate and comprising a plurality of semiconductor layers which comprise Si or SiGe and have different Ge composition ratios. According to the present invention, stress and crystal defects that may occur by sudden changes of the composition of Ge can be minimized, and a more efficient solar cell can be fabricated.
Claims13
A solar cell comprising:
- a substrate having an electrode layer;
- and
- a light-absorbing layer formed on the substrate and comprising a plurality of semiconductor layers which comprise Si or SiGe and have different Ge composition ratios, wherein the Ge composition ratio of the light-absorbing layer varies so as to correspond to a Ge composition gradient according to the distance between the light-absorbing layer and the substrate.
A method of manufacturing a solar cell, comprising:
- loading a substrate having an electrode layer;
- depositing a semiconductor layer comprising Si or SiGe on the substrate;
- and
- forming an i-semiconductor layer by depositing at least one semiconductor layer having a Ge composition ratio different from that of the previously deposited semiconductor layer, wherein the Ge composition ratio of the i-semiconductor layer varies so as to correspond to a constant composition gradient according to the distance between the i-semiconductor layer being deposited and the substrate.
1 more element
Dependencies are inferred from the claim text.