Numerical simulation of a free-HTL perovskite FASnI3-based solar devices
In the work, novel free-HTLs will be designed using the simulator to explore their potential and performance for HTL-free PSCs. In order to obtain optimal device performance, several device parameters, including the thickness, doping concentration, and defect density for the absorber and also other layers will be investigated.
Status: Ongoing
Date of proposal: 17/11/2022
Start date: 01/03/2023
End Date: 30/04/2023
Used Instruments: SILVACO TCAD simulation infrastructure.
Experimental Technique: Numerical simulation of perovskite solar cells using SILVACO TCAD software.
Experiment Description: The study involved numerical investigation of a high-efficiency, hole transport layer (HTL)-free, lead-free carbon-perovskite solar cell based on formamidinium tin iodide (FASnI3) with zinc oxide (ZnO) as the electron transport layer (ETL). The simulation examined several parameters affecting the performance of the perovskite solar cell, including absorber thickness, defect density, and various back contact materials (C, Cu, Ag, Ni).
Type Samples: Simulated perovskite solar cells.
Sample Description: The simulated solar cell structure: FTO/ZnO/FASnI3/back contact (C, Cu, Ag, Ni).
Experiment Data Type: Efficiency data, open-circuit voltage, short-circuit current density, fill factor. Influence of back contact materials on solar cell performance.
Characterization Technics: TCAD-based simulation for device performance analysis. Investigation of various back contact materials.
Characterization Data Type: Performance metrics of the simulated solar cells with various back contact materials. Efficiency as a function of absorber thickness, defect density, doping, and operational temperature.
Analyzed Data: Impact of absorber thickness, defect density, and doping on solar cell efficiency. Comparative analysis of device performance with different back contact materials.
Main Targets Project: Developing a numerical model for a high-efficiency HTL-free carbon-perovskite solar cell. Investigating the influence of various parameters on the performance of the solar cell.
Main Achievements Findings: Demonstrated that a solar cell with an absorber thickness of around 500 nm and a total defect density of 10¹³ cm?³ can produce high efficiency (20.66%) with carbon as the back contact at 300K. Confirmed that increasing the thickness of the absorber (FASnI3) improves the PCE of the device. Identified that reducing the density of defect below 10¹? cm?³ greatly improves efficiency. Showed that the device performance is at its highest when the operating temperature is 300K.