Optical, Physical, Chemical Characteristics and Functional Modulation of Novel Quantum Materials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 1426

Special Issue Editors


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Guest Editor
Department of Photonics, Feng Chia University, Seatwen, Taichung 40724, Taiwan
Interests: photonic crystals; quantum materials; photonic devices; contact lens
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan
Interests: novel highly efficient phosphors; perovskite quantum dots; white light-emitting diodes

Special Issue Information

Dear Colleagues,

The field of quantum materials encompasses a diverse range of materials that exhibit unique and often exotic quantum phenomena due to their specific electronic and structural properties, and these materials have the potential to revolutionize various technologies, including electronics, information processing, and energy harvesting.

In summary, the history of optical, physical, and chemical characteristics, and the functional modulation of novel quantum materials is deeply rooted in the evolution of quantum mechanics, semiconductor physics, and the ongoing quest to harness quantum phenomena for technological advancement. Ongoing research continues to unveil new possibilities and applications in this rapidly evolving field.

The primary goal of this Special Issue is to contribute to the knowledge and development of quantum materials by investigating their optical, physical, and chemical characteristics. Researchers aim to deepen their understanding of these materials at the quantum level and uncover new ways to modulate their functional properties, with the overarching aim being to facilitate advancements in technology and materials science through the innovative use of quantum phenomena.

This Special Issue encompasses a diverse set of topics including topological quantum materials, quantum dots and nanomaterials, 2D materials and heterostructures, quantum materials for quantum information processing, machine learning in quantum materials research, quantum sensing and metrology, and energy harvesting and storage.

We welcome submissions of review articles and original research articles on the theoretical study of quantum materials and innovation in applications and devices and the synthesis and characterization of materials.

Prof. Dr. Chun-Feng Lai
Dr. Chun-Che Lin
Guest Editors

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Keywords

  • quantum materials
  • quantum devices
  • nanocrystals
  • luminescent materials

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Published Papers (1 paper)

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Research

9 pages, 3430 KiB  
Article
Enhancement of Light Efficiency of Deep-Ultraviolet Light-Emitting Diodes by Encapsulation with a 3D Photonic Crystal Reflecting Layer
by Chun-Feng Lai, Chun-Peng Lin and Yu-Chun Lee
Nanomaterials 2024, 14(11), 983; https://doi.org/10.3390/nano14110983 - 5 Jun 2024
Viewed by 1151
Abstract
Recently, UVC LEDs, which emit deep ultraviolet light, have found extensive applications across various fields. This study demonstrates the design and implementation of thin films of three-dimensional photonic crystals (3D PhCs) as reflectors to enhance the light output power (LOP) of UVC LEDs. [...] Read more.
Recently, UVC LEDs, which emit deep ultraviolet light, have found extensive applications across various fields. This study demonstrates the design and implementation of thin films of three-dimensional photonic crystals (3D PhCs) as reflectors to enhance the light output power (LOP) of UVC LEDs. The 3D PhC reflectors were prepared using the self-assembly of silica nanospheres on a UVC LED lead frame substrate via the evaporation-induced method (side) and the gravitational sedimentation method (bottom), respectively. These PhCs with the (111) crystallographic plane were deposited on the side wall and bottom of the UVC LED lead frame, acting as functional materials to reflect UVC light. The LOP of UVC LEDs with 3D PhC reflectors at a driving current of 100 mA reached 19.6 mW. This represented a 30% enhancement compared to commercial UVC LEDs with Au-plated reflectors, due to the UVC light reflection by the photonic band gaps of 3D PhCs in the (111) crystallographic plane. Furthermore, after aging tests at 60 °C and 60% relative humidity for 1000 h, the relative LOP of UVC LEDs with 3D PhC reflectors decreased by 7%, which is better than that of commercial UVC LEDs. Thus, this study offers potential methods for enhancing the light output efficiency of commercial UVC light-emitting devices. Full article
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