| 초록 |
Aluminum-doped zinc oxide (AZO) has been interested in one of the most candidate transparent conducting oxide (TCO) materials for solar cells. In the case of dye-sensitized or perovskite solar cells, thermal stability of TCOs is required because coating of TiO2 layer preceded by the deposition of TCO thin film is conducted above the temperature of 400 oC. Unfortunately, electrical properties of AZO deteriorate above the temperature of 300 oC due to annihilation of oxygen vacancies by the adsorbed oxygen, and the formation of AlOx reacted with diffused Al and oxygen in the surface of AZO. Here we applied ZnF2 thin film as the barrier layer to protect adsorbing oxygen atoms in the air, and keep good electrical and optical properties of AZO during high temperature process. ZnF2/AZO double-layered TCOs showed enhanced thermal stability and suitable optical properties for DSSCs or perovskite solar cells after high temperature process in air ambient. |
