Semiconductor Light-Emitting Chip: Structure, Design and Synthesis

A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Inorganic Solid-State Chemistry".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 2850

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Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 510641, China
Interests: electronic device packaging; white-light-emitting diode; laser illumination; quantum dots; thermal management of electronic devices; visible light communication
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Special Issue Information

Dear Colleagues,

Light-emitting diodes (LEDs) are widely used in many application fields, such as general lighting, electronic displays, traffic lights, communications and detection, etc. During the past several decades, the luminous efficiency of the LEDs significantly improved with the advances in the design and manufacturing technologies of functional structures, for instance optical structures, material structures and electronic structures. In this Special Issue, we welcome contributions that focus on the structure design and synthesis of LEDs. The articles for consideration may contain theoretical and experimental studies on functional structure design or manufacturing including, but are not limited to, the following topics:

  • Lighting design, including general high-quality lighting, healthy lighting, high-power lighting and laser lighting, etc.;
  • Display design, including RGB LED components, mini LED displays, Micro LED displays, local dimming and holographic displays, etc.;
  • Lens design: including the simulation and manufacturing of freeform surface lenses, lens systems, compound lenses, Fresnel lenses, collimating lenses and microlens arrays, etc.;
  • Design and simulation methods, including finite difference time domain (FDTD), ray tracing (RT), finite element method (FEM), boundary element method (BEM), and method of moments (MoM), etc.;
  • Metamaterials or metastructures, including metasurfaces or micro/nano structures with novel functions;
  • Fluorescent conversion components: phosphor in glass (PIG), phosphor in silicone (PIS), phosphor in ceramic (PIC) and YAG crystals, etc.;
  • Flexible electronics and wearable electronic devices designs, simulations and manufacturing;
  • Visible light communication, including low-junction-capacity light sources, antennae, signal modulation and demodulation, and visible light locations;
  • Thermal management of LED systems, including diversified cooling methods, temperature control methods, high-thermal conductive material, high-efficient heat transfer method, etc.

Dr. Xinrui Ding
Guest Editor

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Keywords

  • light-emitting diode
  • optical structure
  • lighting
  • laser
  • display
  • light conversion
  • thermal management
  • metamaterial
  • metastructure

Published Papers (1 paper)

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Research

19 pages, 6862 KiB  
Article
An Experimental and Theoretical Study of the Optical Properties of (C2H7N4O)2BiCl5 for an Optoelectronic Application
by Hela Ferjani, Youssef Ben Smida, Damian C. Onwudiwe, Nuha Y. Elamin, Safa Ezzine and Norah S. Almotlaq
Inorganics 2022, 10(4), 48; https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics10040048 - 01 Apr 2022
Cited by 6 | Viewed by 1993
Abstract
This study explores the electronic properties of (C2H7N4O)2BiCl5 using the density functional theory (DFT) method, which was compared with the experimental data. The band structure of the compound indicated that it is a direct [...] Read more.
This study explores the electronic properties of (C2H7N4O)2BiCl5 using the density functional theory (DFT) method, which was compared with the experimental data. The band structure of the compound indicated that it is a direct semiconductor with a band gap energy of 3.54 eV, which was comparable with the value (3.20 eV) obtained experimentally from the UV–vis spectroscopy. The density of state study showed that the conduction band was formed mainly by Bi 6p, C 2p, and N 2p states, while the valence band was formed mainly by Cl 2p, O 2p, and N 2p states. Hirshfeld surface analysis and enrichment ratio (E) were further used to investigate and quantify the intermolecular interactions within the compound. These studies established that the most important role in the stability of the structure of this crystalline material was provided by hydrogen bonding and π–π stacking interactions. The crystalline morphology of the compound was determined using BFDH simulation, based on the single-crystal structure result. Furthermore, Fourier transform infrared spectroscopy (FTIR) was used to study the vibrational modes of carbamoyl-ganidinium cations. The charge transfer process within the anionic chains of [BiCl5], studied using photoluminescence spectroscopy, resulted in a broad emission band with two positions of maxima centered at 336 and 358 nm. This work offers a good understanding of the optical, structural, as well as the electrical properties of (C2H7N4O)2BiCl5, which are necessary in its applications in areas such as multifunctional magnetic, optoelectronic, and photonic systems. Full article
(This article belongs to the Special Issue Semiconductor Light-Emitting Chip: Structure, Design and Synthesis)
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