| 초록 |
The Organic-inorganic hybrid perovskite solar cell, the light-harvesting material, has appealed to significant scientific interest in the field of the solar cell. Among perovskite solar cells, Formamidinium lead triiodide (FAPbI3) has been a newly developed candidate with the longer electron and hole diffusion lengths, lower band gap 1.48eV, and better thermal stability comparing with MAPbI3. Until recently, keeping the phase of α-FAPbI3 is the major issue in the perovskite solar cell region as the drawback of FAPbI3 is that it transforms from black cubic alpha phase (α- FAPbI3 )to yellow hexagonal delta phase (δ- FAPbI3) at ambient temperature. To keep α- FAPbI3 phase, we will partially replace CaCl2 with PbI2 and are expecting that the phase of FaPbI3 will go noticeably stable without changing material optical properties. |
