| 摘要 |
The present invention provides a practicable, high-efficiency, low-cost solar cell that overcomes a limitation regarding theoretical conversion efficiency in such a way that optical absorption is effectively maximized by inserting a semiconductor/insulator multilayer quantum well structure capable of tunneling between plus and minus electrodes, i.e., output terminals including two electrodes having different work functions present in various types of solar cells, thereby reducing transmission loss and short-wavelength loss of solar light. Accordingly, the present invention provides a practicable solar cell using a multilayer tunneling quantum well structure that enables the range of selection of upper and lower electrodes of a quantum well structure solar cell to be extended and the operation theory and structure of a corresponding device to be newly established. Therefore, the practicable solar cell is applicable not only to the silicon devices of preceding patents but also to transparent and non-transparent type high-efficiency, thin, flexible solar cells and high-efficiency rear electrode solar cells in terms of application, and also reduces the manufacturing costs. In addition, the present invention provides a method for manufacturing the practicable solar cell using a multilayer tunneling quantum well structure. The solar cell using a multilayer tunneling quantum well structure comprises: a first electrode which is formed on a transparent substrate; quantum well structures each of which includes an insulation layer, a semiconductor layer, and an insulation layer capable of tunneling; a second electrode which is formed on the quantum well structures; and a reflection prevention film which is formed on a bottom surface of the first electrode and is made of SiNx. |
