Physical device simulation of Silicon/Perovskite solar cell featuring HTL/ETL materials for optimizing band offsets and electrical properties
Numerical simulations via Silvaco TCAD simulator provides in-depth physics insights along with realistic observations of the design parameters that influence the PV performance of the solar cell. In this collaborative project, perovskite solar cell (PSC) will be simulated in tandem with Silicon for enhancing the PV performance. A comparative investigation for couple of electron transport layers (ETL) and hole transport layers (HTL) will be undertaken to analyze the band offsets at various interfaces as well as examine their electrical and optical properties. Various design parameters such as doping concentration, thickness of layers, defects states, and temperature variation analyses will be executed to optimize the device. For veracity of simulation studies, the PV data for a stable PSC (over one year with minimum degradation in power conversion efficiency) will be incorporated at AM 1.5 sunlight. Articles from the project will be published in reputed journals for widespread reach.
Status: Ongoing
Date of proposal: 28/02/2024
Start date: 23/04/2022
End Date: 23/05/2022
Used Instruments: Silvaco TCAD (physical device simulator).
Experimental Technique: Device simulation and optimization. Energy band diagram analysis. PN-junction analysis.
Experiment Description: The project aimed to design and simulate perovskite-based solar cells with efficiencies exceeding 20%. The work was executed in two phases: the first phase involved the simulation of single junction perovskite-based solar cells, and the second phase included the simulation of hybrid heterojunction solar cells.
Type Samples: Simulated perovskite-based solar cells.
Sample Description: Four configurations of single-junction Perovskite-based solar cells with different combinations of Electron Transport Layer (ETL) and Hole Transport Layer (HTL).
Experiment Data Type: Energy band diagrams. Electrical and optical properties from simulations.
Characterization Technics: Simulation and parametric analysis in TCAD.
Characterization Data Type: Band offsets and bending. Recombination rates at interfaces PV performance characteristics (Voc, Jsc, FF, ?).
Analyzed Data: Analysis of different device configurations for optimal performance. Study of charge transport and recombination rates in various structures.
Main Targets Project: Design and simulation of high-efficiency perovskite-based solar cells. Optimization of solar cell configurations with different ETL and HTL materials.
Main Achievements Findings: Simulation of four device configurations with variations in thickness and doping concentrations Structure 1 (front contact/n-ITO/Perovskite/Spiro/back contact) gave the best performance with Voc = 892 mV, Jsc = 16.65 mA/cm2, FF = 81.59%, and ? of 12.12%. Structures employing CZTS as HTL showed poor performance due to absence of effective charge carrier separation mechanism.
Review 9
How would you describe your experience with the VIPERLAB opportunity? How did the experience/visit at CENER meet your expectations?
It has been a wonderful experience working with the team at CENER Spain under VIPERLAB opportunity. Particularly, we were interested in examining the optoelectronic properties of Perovskite-based solar cells using physical device simulator. The lacking of the required device simulator (Silvaco TCAD) at our end was complemented by the availability of the facility at CENER Spain that provided us a unique opportunity to forge international collaborations as well as open a new horizon for innovative research for developing competencies related to solar cell designing and its characterization. We hold meetings/have email conversations to discuss about the research experiments that were useful in enhancing the research capacity building. Its true that our proposed solar cell structure need further improvement in order to extract some meaningful performance; but the collaboration with CENER can go a long way in terms of research engagement and publishing results in reputed journals. We are truly appreciative of Dr. Eugenia Zugasti Rosende, Jaione Bengoechea Apezteguia, and other team members for their guidance and assistance in simulation of the proposed solar cell device. Moreover, I would very much like to continue our research momentum so that we are able to benefit from the CENER facility.
Did you face any difficulties during your visit or application process?
No, I did not faced any difficulty during application process. The mode of our experiment was simulation-based so our interaction/meeting with CENER team was held online.
Does this VIPERLAB experience at CENER bring you closer to your research objectives? How?
One of our research objectives was to determine the feasibility of our proposed solar cell device based on Perovskite design. Although we have not been able to extract significant performance figures from the proposed device, but we were able to understand the physical insights and dynamics involved behind the charge transportation such as recombination rate, energy band diagram, junction formation. These analyses proved to be crucial in determining the performance of the device something which would not have been possible with other 1D simulators. Primarily, we have been able to inch closer towards meeting our research objective as the proposed structure needs further modification in terms of structural configuration. Further participation in the program can be envisaged to realize highly efficient Perovskite solar cell designs.
What other VIPERLAB activities have you participated in, or would you like to participate in?
I would like to participate further by engaging as a Postdoctoral Scholar under VIPERLAB program for forging our collaboration to the next level via designing of a feasible solar cell structure and publishing our results with the internationally recognized journals.
Do you intend or already did publish/present your collected results in a paper or conference?
We intend to present a paper in the conference and will give acknowledgements to VIEPRLAB.