In this study, we reported a 36 improvement in the performance of inverted solar cells as a result of increased short-circuit current (JSC) obtained using a composition of zinc oxide (ZnO) and reduced graphene oxide (RGO) as an n-type buffer layer. RGO-ZnO nanocomposites show higher electron conductivity than intrinsic ZnO; moreover, they show reduced contact resistance at the interface between the active layer and n-type buffer layer. These factors prevent carrier loss resulting from defects and recombinations in the device, thereby significantly increasing the JSC value for the device. Thus, an efficiency of 4.15 was achieved for inverted solar cells with a controlled RGO-ZnO nanocomposites layer.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) (Grant Nos. 2012-008721 and 2011-0022765) founded by the government of Korea (MEST).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)