| 摘要 |
A solar cell with improved energy efficiency is presented. The solar cell includes a substrate having a plurality of cell areas separated by a cell separation area, back electrodes spaced apart from each other by a gap, a light absorbing layer, a transparent electrode layer, and a buffer layer. Each of the back electrodes is disposed over neighboring cell areas and a cell separation area. The light absorbing layer is disposed on the back electrodes and in the gap to absorb incident light. A contact hole extends through the light absorbing layer to a portion of the back electrodes. The transparent electrode layer disposed on the light absorbing layer connects to the back electrodes through the contact hole. The buffer layer is disposed between the light absorbing layer and the transparent electrode layer to cover upper and side surfaces of the light absorbing layer.
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