Speaker
Description
The report presents innovation and development of a novel architecture of easily preparation of bilayer of Methy ammonium lead iodide (MAPbI_3) perovskite thin films and, self-synthesized Cadmium sulphide (CdS nanocrystal deposited on Fluorine doped tin oxide (FTO) to obtained high specific capacitance, energy and power of higher density and extended life for application as electrode in electrochemical capacitors. CdS nanocrystals deposited on FTO were used to support the accessible the electrolytic surface area of redox active MAPbI_3 top layers. A layer by layer self-assembly technique was used in other to increase processability of MAPbI_3 and pulsed laser ablation in liquid was utilized to structurally modified the CdS. Maximium areal capacitances of 141 μFcm^(-2), based on the MAPbI_3/CdS bilayers electrodes, was obtained for the symmetric electrochemical capacitor by cyclic volumetric (CV) technique with scanning rate of 0.001 V/s with potassium hydroxide dissolved in a pure 1.0 gmL^(-1) solution of polyvinyl alcohol-chlorobenzene electrolyte. The device demonstrated exceptional rate capability and long-life cycling stability with above 87% of the original areal capacitance been preserved after 4000 cycles. These finding suggested that MAPbI_3/CdS/FTO design holds a great promise development of high performance electrochemical capacitor.
| Keyword-1 | perovskite |
|---|---|
| Keyword-2 | electrochemical |
| Keyword-3 | capacitance |