A kind of microlattice mismatch quantum well solar cell and its preparation method
A technology of solar cells and quantum wells, applied in the field of solar cells, can solve the problems of difficult control of cell defects
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[0048] The present invention will be further described below in conjunction with specific examples.
[0049] Such as figure 1 As shown, the microlattice mismatch quantum well solar cell described in this embodiment is mainly composed of "Ge / In y Ga 1- y As / In z Ga 1-z P" triple junction structure, can also be "Ge / In y Ga 1-y As / AlGaInAs / AlGaInP" four-junction structure. In this embodiment, the microlattice-mismatched quantum well solar cell uses p-type Ge as the substrate, and is stacked sequentially from bottom to top from the upper surface of the substrate lined up In 0.5 Ga 0.5 P nucleation layer, In 0.01 Ga 0.99 As buffer layer, distributed Bragg reflector, first tunnel junction, In x Ga 1-x P gradient buffer layer, In y Ga 1-y As middle cell, second tunnel junction, In z Ga 1-z P top battery, In y Ga 1-y An As ohmic contact layer, a front electrode, and an anti-reflection film; a back electrode is prepared on the lower surface of the p-type Ge substrate....
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