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01-02-2025

An efficient multispectral CsSnI3 MSM photodetector using back grooves and light trapping optimization: FDTD-GA calculations

Authors: H. Ferhati, F. Djeffal

Published in: Journal of Computational Electronics | Issue 1/2025

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Abstract

The present work aims at developing a new design strategy based on optimizing light trapping management in the CsSnI3 perovskite active layer using back groove engineering, to tune the broadband photoresponsivity. To do so, an extensive numerical simulations based on 2D-Finite Difference Time Domain (FDTD)-SILVACO calculations are carried out to assess the optoelectronic properties of the proposed sensor, including the impact of back grooves engineering. The effect of the groove geometry on the photosensing characteristics of the photodetector (PD) is analyzed. It is found that the depth, width and the period of the back grooves can modulate the optical behavior of the CsSnI3 perovskite active layer, showing a great potential for improving the light harvesting capabilities over a wide spectral range. A Genetic Algorithm Optimization (GAO) technique is implemented to find out the best groove geometry and period, offering the highest photoresponse over UV to NIR spectral bands. The obtained results show the ability of the proposed strategy to improve and tune the optoelectronic properties of the device, demonstrating a high responsivity of 78 mA/W and an improved ION/IOFF ratio of 61 dB. Therefore, the proposed approach can open new paths to enhance the optical and electrical performances of thin film perovskite photodetectors by optimizing the light trapping management using back groove engineering and metaheuristic calculations.

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Metadata
Title
An efficient multispectral CsSnI3 MSM photodetector using back grooves and light trapping optimization: FDTD-GA calculations
Authors
H. Ferhati
F. Djeffal
Publication date
01-02-2025
Publisher
Springer US
Published in
Journal of Computational Electronics / Issue 1/2025
Print ISSN: 1569-8025
Electronic ISSN: 1572-8137
DOI
https://doi.org/10.1007/s10825-024-02251-9