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Broadband quantum dots-in-a-well solar cells

The conversion efficiency of broadband InGaAs quantum dots-in-a-well (DWell) solar cells has been improved by optimizing the p-type doping and growth temperature for the DWell. The solar efficiency (η) is 130% times of the counterpart of GaAs baseline cell. Moreover we obtain the best photovoltaic result by inserting matrix pattern instead grid pattern and using wet etching to enhance the conversion efficiency. The photovoltaic characteristics shows an efficiency of 10.86%.