CIS/CIGS SOLAR CELL HAVING A REAR TCO LAYER AND PRODUCTION METHOD THEREFOR

摘要

Disclosed herein are a CIS/CIGS solar cell and a method of manufacturing the same. The CIS/CIGS solar cell includes: a substrate; first and second molybdenum electrodes disposed on the substrate at a predetermined interval in parallel with each other; a TCO layer disposed on upper and lateral sides of the second molybdenum electrode; a buffer layer disposed on upper and lateral sides of the TCO layer to compensate for a difference in bandgap between the TCO layer and a light-absorbing layer; the light-absorbing layer disposed on the first molybdenum electrode, the buffer layer and an area of the substrate partially opened between the first molybdenum electrode and the buffer layer; and an antireflection layer disposed on the light-absorbing layer to minimize the reflection of externally-applied light. According to the CIS/CIGS solar cell, a buffer layer and a TCO layer are disposed at the rear side of a light-absorbing layer to prevent the amount of light incident upon the light-absorbing layer from being reduced by removing the incident light obstruction structure disposed on the light-absorbing layer, so the amount of light incident upon the light-absorbing layer can be maximized, thereby increasing the energy conversion efficiency of the solar cell.