Carrier Collection Model and Design Rule for Quantum Well Solar Cells

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説明

Multiple quantum wells (MQWs) help enhance the light absorption but suffer from their poor carrier transport. Here, we propose a design rule for the cell optimization, particularly focusing on the optimal position and stack number for a given MQW structure. According to the effective-mobility model, the carrier collection from MQW is efficient when the carrier density profile is balanced and the total thickness is kept below the drift length. Based on this finding, we propose the modified detailed-balance calculation which includes the carrier collection behavior in MQW solar cells.

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