| 초록 |
The solution process is an effective method for fabricating low-cost and high-efficiency perovskite solar cells. However, the formation of perovskite films at low temperatures causes the growth of submicron grains with defects, lowering the efficiency and stability to water and air. Passivation of these grain boundary defects promises to improve solar cell performances. We used an anionic perfluorocarbon surfactant as an additive to obtain anionic defects passivation effect and increase the stability by hydrophobic functional group. The best device showed the performance of Jsc ~ 21 mA/cm2, Voc ~ 1.05, FF ~ 73.1%, and PCE ~ 16%, showing an efficiency improvement of 12.6% compared to the conventional device. |
