Area and Publications

Perovskite-Silicon Tandem Solar Cell

One of Saklain's primary research focuses is the analysis of perovskite material-based solar cells. His aim is to maximize the utilization of the solar radiation spectrum, which led him to work on a tandem structure for the solar cell. His proposed tandem structure comprises a perovskite-based cell on top and a silicon-based cell at the bottom. Through meticulous numerical analysis, Saklain optimized various parameters of the cell to achieve maximum efficiency. Remarkably, he attained an efficiency of up to 25.03% for the perovskite layer and reached up to 24.97% for the silicon-based cell. By employing a tandem structure, he successfully achieved an overall efficiency of approximately 41%, which is a significant accomplishment.

Publication: M. S. Morshed, K. K. Bhowmik and M. S. Islam, “Investigation of MoS2/Perovskite/WSe2 on Si Tandem Structure of Solar Cell,” 2022 12th International Conference on Electrical and Computer Engineering (ICECE), Dhaka, Bangladesh, 2022, pp. 120-123, doi: 10.1109/ICECE57408.2022.10088720.

Consistency of Peak Wavelength in GaN Nanowire Arrays

Nanowires(NW) array offer improved optical confinement compared to single nanowire, but their performance heavily depends on the filling fraction value. This study aims to explore the relationship between different filling fractions and various radii of GaN nanowires integrated with Silicon substrates and an ITO top contact, using Finite Difference Time Domain (FDTD) analysis. This findings indicate that nanowires with radii of 50 nm and 60 nm exhibit a consistent behavior with respect to filling fraction, forming a distinct cluster in terms of Maximum Absorbance, and peak wavelengths. In contrast, nanowires with different radii display more scattered behavior. Interestingly, 55nm radius-based nanowires show an independent peak at approximately 375nm, regardless of the filling fraction. Nanowires with radii of both 50nm and 60nm exhibit similar behavior, sharing a consistent peak wavelength of 378nm, and this consistency remains unaffected by variations in the filling fraction. These insights shed light on fabrication flexibility in optimizing nanowire-based devices for improved performance and integration in optoelectronics applications

Publication: M. S. Morshed, “Consistency of Peak Wavelength with Higher Absorption of GaN Nanowire Arrays : Independency on Filling Fraction ” - Accepted: The 5th IEEE International Conference on Telecommunications and Photonics (ICTP) 2023

Dimension Dependent Optical Behavior of GaN Across 0D, 1D, 2D, 3D Structures

This study distinguishes itself by conducting a com- parative analysis of GaN’s optical characteristics across different dimensions, namely 0D, 1D, 2D, and 3D. The primary objective is to uncover variations in reflectance, transmittance, and ab- sorptance among these dimensions. In the case of 0D structures, ranging from 2nm by 2nm to 6nm by 6nm, the research identifies that a diameter and length of 5nm by 5nm exhibit the highest reflectance. Absorptance displays a dual behavior, with the 2nm by 2nm structure dominating below 250nm wavelengths, while the 5nm by 5nm structure takes precedence beyond 250nm. Within 1D structures, a 50nm long nanowire demonstrates the highest reflectance at 400nm, surpassing coalesced nanowires of lengths ranging from 100 to 300nm. Concerning absorptance, a distinctive peak emerges around 380nm, with the 300nm long nanowire dominating. The 2D structure unveils strong transmittance due to its thin layer thickness, whereas in the 3D configuration, absorptance and reflectance exhibit a dynamic interplay reminiscent of a ”thief-police” relationship

Publication: M. S. Morshed, “Dimension Dependent Optical Behavior of GaN Across 0D, 1D, 2D, and 3D Structures” - Accepted: 6th International Conference on Electrical Information and Communication Technology 2023

A Thorough Probe into Enhancing Energy Harvesting via Piezo-Modules

This research provides a detailed explanation of the design process for an energy harvesting prototype with piezo electric modules and the power conditioning circuit employed to optimize energy capture. The study primarily aims to explore efficient energy generation and capture methods. The electric energy generated by these modules through direct strain or ambient vibration is influenced by factors such as the number of piezoelectric transducers, the harvesting circuit, applied load, and arrangement scheme. The design and testing of the model were intended for scalability and increased power generation. This research assesses the effectiveness of various piezoelectric module connections for power generation in the 17-station of MRT line-6 project of Bangladesh. It comprehensively explores the performance of piezoelectric modules in different configurations like series, parallel, and series-parallel combined. Results show significant potential in these combinations, producing impressive power outputs under an average 60kg pressure: 0.1674mW, 0.242mW, and 0.2223mW for series, parallel, and series-parallel setups, respectively. Rigorous data analysis leads to the clear conclusion of outstanding performance. These findings are crucial for understanding the use of piezoelectric modules in generating power for transportation systems and suggest opportunities for further research in this domain.

Publication: M. S. Morshed, M. T. Sourav, H. Maruf “A Thorough Probe into Enhancing Energy Harvesting via Piezo-Modules in Metrorail Stations” - Accepted : International Conference on Power Systems 2023

Spectra Dependent Photovoltaics - Micro Energy Harvesting

During his postgraduate studies, Saklain delved into the coursework on "Solar Cells," where he became acquainted with the spectral impact on photovoltaics. This exploration led him to the intriguing discovery that the limitations imposed by the Shockley-Queisser limit on solar cell efficiency could potentially be overcome through the utilization of three-color LED-based photovoltaic systems. The concept of spectra-dependent photovoltaics captivated him to such a degree that he embarked on further research in this field. Driven by his inspiration, Saklain is currently engaged as a co-researcher in a project titled "Role of Photonic Structures in Spectra dependent Energy Harvesting of CZTSSe Photovoltaic Modules." His esteemed collaborators in this endeavor are Eymuna Maria and Dibakar Roy, working under the guidance of Dr. Zunaid Baten. The focus of their research lies in exploring the crucial role played by photonic structures in optimizing the energy harvesting potential of CZTSSe photovoltaic modules in a spectra-dependent manner.

Publication: Eymana Maria, Dibakar Roy, M. S. Morshed, Md Zunaid Baten. “Role of Photonic Structures in Spectra dependent Energy Harvesting of CZTSSe Photovoltaic Modules” - In preparation

Nanowire Architecture in Photovoltaics and Photodetectors

Saklain's current research endeavors are primarily focused on the investigation of nanowire array architecture. Specifically, he is delving into the photovoltaic and photoconductive modes of operation within nanowire arrays. A significant aspect of his research involves examining the surface depletion effects observed in nanowires. Understanding how the illumination impacts the surface band diagram of a nanowire is a key area of concern as it directly influences the performance of solar cells. In addition, he recognizes the paramount importance of proper design and thorough numerical analysis to achieve a high gain in photodetectors. This aspect forms another pivotal facet of his research, as he endeavors to optimize the performance of photodetectors through meticulous design considerations and comprehensive numerical analysis.

Publication: M.S. Morshed and Md Zunaid Baten, “Surface Depletion Effect of GaN Nanowire Array with Semi-Coalesced Conditions Leads to High Optical Gain” - In preparation