Reducing the quantum confined Stark effect through unidirectional graded quantum well for high luminescence intensity 280-nm deep-ultraviolet light-emitting diode

Hairol Aman, Mohammad Amirul and Ahmad Fajri, Faris Azim and Ahmad Noorden, Ahmad Fakhrurrazi and Abdul Aziz, Azni and Danial, Wan Hazman and Abdul Kadir@Jaafar, Muhammad Zamzuri (2024) Reducing the quantum confined Stark effect through unidirectional graded quantum well for high luminescence intensity 280-nm deep-ultraviolet light-emitting diode. Jurnal Fizik Malaysia, 45 (1). pp. 10163-10175. ISSN 0128-0333 E-ISSN 2590-4191

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Abstract

Research on Deep-ultraviolet light-emitting diode (DUV-LED) has become prominent recently due to the demand for purifying and disinfecting the COVID-19 virus in the 2021 pandemic. Unfortunately, the performance of the DUV-LED has been hindered by the Quantum Confined Stark Effect (QCSE) which reduces the recombination of electrons and holes in the quantum wells, thus deteriorating the luminescence intensity. In this research, two epi-structures with different types of quantum wells grading have been investigated and compared with the conventional quantum wells. The analysis covers several important optoelectronics properties such as the band diagram, carrier concentration, electric field, wavefunction of the carrier and luminescence spectrum. It is found that one of the graded quantum wells provides 31% enhancements for luminescence intensity relative to the conventional quantum well and the emission wavelength shifted around 1 nm only.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Unidirectional graded quantum well, Carrier wavefunction, Quantum Confined Stark Effect, Luminescence intensity, Deep-ultraviolet light-emitting diode
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Chemistry
Depositing User:	Dr Azni Abdul Aziz
Date Deposited:	12 Sep 2024 10:24
Last Modified:	12 Sep 2024 10:46
URI:	http://irep.iium.edu.my/id/eprint/114345

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