| 초록 |
Perovskite solar cells (PeSCs) have attracted great attention as next power sources due to their decent optoelectronic properties. Although PeSCs with high power conversion efficiency (PCE) up to 20 % were recently reported, the understanding of mechanism for formation of perovskite crystalline structure associated with device performance variations has seldom been reported. To obtain the decent film morphology and high reproducibility, we had been introduced the N-cyclohexyl-2-pyrrolidone solvent as an additive. However, the obvious mechanism and origin of these decent film morphologies were not clearly understood yet. Therefore, we implemented investigations to figure out the relationship between the film morphology and some characteristics of additives such as vapor pressure, functional group, etc. Finally, we will discuss the perovskite crystalline behavior contingent upon some selected additives such as the N-methyl-2-pyrrolidone, N-octyl-2-pyrrolidone, Benzyl benzoate, etc. |
