| 초록 |
In this research, we have been investigated the delamination of [6,6]-phenyl C61-butyric acid methyl ester (PC60BM) from the CH3NH3PbI3 (MAPbI3) layer due to its severe reason for the degradation of planar type based perovskite solar cells (PSCs). Here, an approx.. ~10-nm thick titanium oxide (TiOx) layer exhibits a function of morphology-fixing agent for PC60BM stability, which induces enhanced long-term stability at the PSCs. Moreover, the devices with the TiOx layer showed enhanced open circuit voltages, current densities, and fill factors, which correlated to increased initial device efficiency. We analyzed SEM and AFM images for the changes of surface morphology of the PC60BM layer on the MAPbI3 layer during long-term operation. Finally, various electrical properties of the devices such as the hole mobility, charge generation and extraction efficiencies was studied from the space-charge-limited current (SCLC) measurements and Jph versus Vint characterizations. |
