Conference Publication
Effect of Cesium iodide dopant for high-efficiency perovskite solar cells via two-step deposition method
Author affiliations and roles
- 1Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan
- 2Center for Green Technology, Chang Gung University, Taoyuan 33302, Taiwan
26th International Electron Devices and Materials Symposium (IEDMS 2021) (2021).
Research topic: Perovskite Solar Cells
Conference information
Abstract
In recent years, the perovskite solar cell achieves over 25% of power conversion efficiency. One-step spin coating, which is now mostly used, is known to have difficulty controlling perovskite films. To improve this problem, perovskite films were produced by using two-step spin coating. These effects of doping Cesium iodide on PbI2 solutions are studied. The doped CsI in PbI2 film was rougher than the pristine PbI2 film to easily absorb the second step solution. And a smoother and flatter perovskite film can be produced. So, it can improve the crystallinity, grain size, and morphology of perovskite film when doping halogen cation in PbI2. And the photovoltaic performance of the device with halogen-dopant is also expected to be improved. Finally, the power conversion efficiency of the solar cell by doping 0.10M CsI in PbI2 increases from 17.4% to 18.96%, compared to pristine device.