| 초록 |
Perovskite solar cells (PeSCs) have attracted much attention over the past few years because of high absorption coefficient, small exciton binding energy, and long carrier diffusion length properties. To date, efficiencies of PeSCs were improved dramatically from 4 to over 21%. Until now, most of researches for PeSCs have been focused on crystallization, morphology, and fabrication processes of perovskite film for better perovskite film formation. Compared with the former, investigations on interfacial engineering of PeSCs have been less explored despite of the possibility for an efficiency enhancement via tuning charge-collection property. In particular, modifications of electron transport layers (ETLs) are less studied due to a difficulty in finding a suitable n-doping material. In this study, we have investigated ETL modification for enhancing cell-efficiency of PeSCs and also studied the modified interface effects on the cell-performances. |
