| 摘要 |
A solar cell is provided to improve efficiency by employing an N-P-N type instead of an N-P type. In order to overcome low efficiency of an N-P type solar cell, an N-P-N type solar cell is developed. The N-P-N type solar cell achieves high efficiency. The efficiency of the N-P-N type solar cell is twice than the N-P type solar cell. Therefore, the N-P-N type solar cell is superior to the N-P type solar cell.
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