Investigation of Hysteresis in all-inorganic perovskite solar cell
The efficiency of perovskite based solar cells have increased exponentially till 25.8% over a span of 12 years, which is the highest recorded efficiency evolution for any group of materials. Despite the stellar optoelectronic properties of the group of materials, there are stability issues that hampers the realisation of perovskite solar cells for long-term usage. Though lead-based perovskites have been proven to withstand ambient situations compared to other perovskites, the lead part gives rise to toxicity problem. In order to combat these problems, cesium based lead-free inorganic perovskites have been explored as solutions. The current proposal is intended to simulate lead-free CsGeI3 based all inorganic perovskite solar cells. Further, the work also intends to identify inorganic ETLs and HTLs so as to alleviate all elements inducing stability problems in the device configurations for ambient functioning.
Status: Ongoing
Date of proposal: 30/05/2022
Start date: 01/09/2022
End Date: 11/01/2023
Used Instruments: MODELAB infrastructure. TCAD simulations tools.
Experimental Technique: Device simulation using TCAD (Technology Computer-Aided Design). Optimization of layer thicknesses in solar cells. Analysis of hysteresis behavior in all-inorganic perovskite solar cells.
Experiment Description: The project involved simulating FTO/TiO2/CsGeI3/inorganic HTL/metal contact-based solar cells to achieve maximum efficiency. The simulation focused on optimizing the thickness of various layers in all-inorganic perovskite solar cells and analyzing the hysteresis loss in these devices.
Type Samples: Simulated all-inorganic perovskite solar cells.
Sample Description: Different structures of solar cells were simulated with variations in Electron Transport Layer (ETL), Hole Transport Layer (HTL), and Perovskite layer thicknesses.
Experiment Data Type: Simulation results for layer thickness optimization. Photovoltaic parameters like PCE, hysteresis loss.
Characterization Technics: TCAD simulations for device performance and hysteresis behavior analysis.
Characterization Data Type: Optimized thicknesses of ETL, HTL, and perovskite layers. Efficiency and hysteresis loss in simulated devices.
Analyzed Data: Comparison of performance metrics for different simulated device structures. Impact of layer thicknesses on hysteresis and efficiency.
Main Targets Project: To achieve high-efficiency in all-inorganic perovskite solar cells through simulation and optimization. To understand and reduce hysteresis in simulated solar cell devices.
Main Achievements Findings: TCAD simulations resulted in the optimization of the thickness of the layers in an all-inorganic perovskite solar cell, achieving a theoretical PCE as high as 22.1%. Identified the optimal layer thicknesses: Perovskite - 900 nm, ETL - 50 nm, HTL - 50 nm. Low hysteresis loss was observed in the tested devices, with further optimizations pending.
Review 12
How would you describe your experience with the VIPERLAB opportunity? How did the experience/visit at X meet your expectations?
The experience with the simulation lab at CENER as part of the VIPERLAB opportunity has been extremely helpful for my work. Dr Zugasti has been very cooperative and encouraged to form insights and gave a directionality to my ideas.
Did you face any difficulties during your visit or application process?
Does this VIPERLAB experience at X bring you closer to your research objectives? How?
Yes, the opportunity has enabled give a direction to the perovskite solar cell fabrication in terms of layers and thicknesses.
What other VIPERLAB activities have you participated in, or would you like to participate in?
Simulation MODELAB for metal doped CsGeI3 perovskite solar cell devices.
Do you intend or already did publish/present your collected results in a paper or conference?
Yes, we are working on papers.