Examination Date: 12 January 2024 (Sunday)

Examination Time: 10:30am

Examination Place: EEE 634 Seminar Room ECE Building, BUET

Title of Thesis: DESIGN OF SILICON CARBIDE BASED SINGLE QUANTUM WELL WHITE LED

Candidate Name: Md. Mahfuzul Haque

Abstract of the Thesis: The unique optical and electrical properties of two-dimensional silicon carbide (2DSiC) have lately attracted considerable attention as a potential element for optoelectronic systems. The initial goal of this work was to investigate the impact of different materials doped into SiC nanosheets on their electrical and optical properties, along with the impacts of strain, vacancy defects, and anti-site defects in SiC. The direct energy bandgap of 2D SiC is calculated to be 2.5671 eV. After a satisfactory examination of the electrical and optical properties, a 2D-SiC-based LED as the active layer is suggested. This LED depends on a singular quantum well and is subsequently microscale-simulated utilizing the SILVACO TCAD program. The LED structure created can generate visible light, namely in the blue, green, and red wavelengths, which together provide white light. The suggested LED device has been analyzed for power spectrum density, current-voltage characteristics, luminous power, CIE color coordinates, and light extraction efficiency. The light emission characteristics of this product offer several attractive attributes, including improved efficiency, heightened electrical conductivity, and more output electrical power.

Biography of the Candidate: Md. Mahfuzul Haque holds a B.Sc. (Engg.) in Electrical and Electronic Engineering (EEE) from Shahjalal University of Science and Technology (SUST), where he graduated second in his class. His professional career began as a Lecturer at Green University of Bangladesh, where he served from September 23, 2019, to January 28, 2021. He is currently a Lecturer at Bangamata Sheikh Fojilatunnesa Mujib Science & Technology University, a role he assumed on February 28, 2022. Md. Mahfuzul Haque's research focuses on solar cell technology, junctionless field-effect transistors (FETs), light-emitting diodes (LEDs), and material properties. His work addresses challenges in energy efficiency, electronics innovation, and sustainable materials development. Mahfuzul is currently a part-time M.Sc. student at Department of EEE, BUET, working under supervision of Dr. Sajid Muhaimin Choudhury. As a post graduate student, he received the BUET Postgraduate (PG) fellowship and the NST fellowship from Ministry of Science and Technology, before converting to a part-time student. He has already published one journal paper from his M.Sc. work, and one journal paper is currently under revision from his thesis work.

Interested faculty members, post graduate students and 4th year undergraduate students are cordially invited to attend the seminar during the final examination of the candidate as per above schedule.