| 초록 |
Colloidal quantum dots (CQDs) are compelling semiconductor materials for optoelectronic applications owing to their tunable bandgap, solution-processibility, and ambient stability. Of chief importance is the ability to tune their absorption and emission into the infrared, a region of interest in optical communications, night vision, biological imaging, and infrared photovoltaics. Here we show the potential of CQD materials in the region beyond silicon’s bandgap. Specifically, we fabricate infrared CQD solar cells that can add extra efficiency to silicon solar cells. We also show the CQD photodetector responding in ~1550 nm with external quantum efficiency of 70%, which can potentially replace the conventional III-V semiconductors used in the SWIR range. |
