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Nanomaterials
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Nanomaterials and Nanofabrication for High Resolution Luminescence Array
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Nanomaterials and Nanofabrication for High Resolution Luminescence Array

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanofabrication and Nanomanufacturing".

Deadline for manuscript submissions: closed (30 May 2022) | Viewed by 4679

Special Issue Editor

Prof. Dr. Chaoxing Wu

E-Mail Website
Guest Editor
Fuzhou University and Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, China
Interests: nanomaterials; semiconductor; nano-pixel light-emitting display; nano-LED; intelligent electronics; nanogenerator technolgy

Special Issue Information

Dear Colleagues,

The rapid development of light-emitting technologies has increased interest in arrays of self-emitting, individually controlled, high resolution light sources at the nanoscale that can overcome the physical laws of diffraction limits and have amazing potential applications, including in nanopixel light emitting displays (NLED), scanning near-field optical microscopes (SNOM), high efficiency solid-state lighting, optical excitation in communications, imaging, and sensing. However, these promising applications are still at an early stage of development due to the lack of high-resolution luminescence arrays. Thus, the development of stable and controllable nanoscale, light-emitting materials and luminescence arrays using nanofabrication techniques is urgently needed.

We invite authors to contribute to this Special Issue with original research articles and comprehensive review articles covering the most recent progress and newest developments in nanomaterials and nanofabrication related to the field of high-resolution luminescence arrays. This Special Issue aims to cover a broad range of subjects, from fundamental mechanisms, nanomaterials, devices, nanofabrication, and modeling that can help researchers worldwide to understand the latest trends and progress in this research field.

Prof. Dr. Chaoxing Wu
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • GaN-LED
  • quantum dots
  • nanofabrication
  • nanoLED
  • microLED
  • nanopixel light emitting array
  • modeling

Published Papers (3 papers)

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Research

10 pages, 2195 KiB  
Article
Theoretical Study of LED Operating in Noncarrier Injection Mode
by Chaoxing Wu, Kun Wang and Tailiang Guo
Nanomaterials 2022, 12(15), 2532; https://doi.org/10.3390/nano12152532 - 23 Jul 2022
Cited by 9 | Viewed by 1489
Abstract
Non-carrier injection (NCI) mode is an emerging driving mode for light-emitting diodes (LEDs) with numerous advantages. Revealing the relationship between the current and the applied alternating voltage in mathematical formulas is of great significance for understanding the working mechanism of NCI–LEDs and improving [...] Read more.
Non-carrier injection (NCI) mode is an emerging driving mode for light-emitting diodes (LEDs) with numerous advantages. Revealing the relationship between the current and the applied alternating voltage in mathematical formulas is of great significance for understanding the working mechanism of NCI–LEDs and improving device performance. In this work, a theoretical model of the relationship between NCI–LED current and time-varying voltage is constructed. Based on the theoretical model, the real-time current is derived, which is consistent with the experimental results. Key parameters that can improve device performance are discussed, including voltage amplitude, frequency, equivalent capacitance, and LED reverse current. The theory presented here can serve as an important guidance for the rational design of the NCI–LEDs. Full article
(This article belongs to the Special Issue Nanomaterials and Nanofabrication for High Resolution Luminescence Array)
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10 pages, 2111 KiB  
Article
Optical Dynamics of Copper-Doped Cadmium Sulfide (CdS) and Zinc Sulfide (ZnS) Quantum-Dots Core/Shell Nanocrystals
by Muhammad Haroon Rashid, Ants Koel, Toomas Rang, Nadeem Nasir, Nadeem Sabir, Faheem Ameen and Abher Rasheed
Nanomaterials 2022, 12(13), 2277; https://doi.org/10.3390/nano12132277 - 1 Jul 2022
Cited by 4 | Viewed by 2069
Abstract
Recently, quantum-dot-based core/shell structures have gained significance due to their optical, optoelectronic, and magnetic attributes. Controlling the fluorescence lifetime of QDs shells is imperative for various applications, including light-emitting diodes and single-photon sources. In this work, novel Cu-doped CdS/ZnS shell structures were developed [...] Read more.
Recently, quantum-dot-based core/shell structures have gained significance due to their optical, optoelectronic, and magnetic attributes. Controlling the fluorescence lifetime of QDs shells is imperative for various applications, including light-emitting diodes and single-photon sources. In this work, novel Cu-doped CdS/ZnS shell structures were developed to enhance the photoluminescence properties. The objective was to materialize the Cu-doped CdS/ZnS shells by the adaptation of a two-stage high-temperature doping technique. The developed nanostructures were examined with relevant characterization techniques such as transmission electron microscopy (TEM) and ultraviolet–visible (UV–vis) emission/absorption spectroscopy. Studying fluorescence, we witnessed a sharp emission peak at a wavelength of 440 nm and another emission peak at a wavelength of 620 nm, related to the fabricated Cu-doped CdS/ZnS core/shell QDs. Our experimental results revealed that Cu-doped ZnS shells adopted the crystal structure of CdS due to its larger bandgap. Consequently, this minimized lattice mismatch and offered better passivation to any surface defects, resulting in increased photoluminescence. Our developed core/shells are highly appropriate for the development of efficient light-emitting diodes. Full article
(This article belongs to the Special Issue Nanomaterials and Nanofabrication for High Resolution Luminescence Array)
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14 pages, 3708 KiB  
Article
Working Mechanisms of Nanoscale Light-Emitting Diodes Operating in Non-Electrical Contact and Non-Carrier Injection Mode: Modeling and Simulation
by Wenhao Li, Kun Wang, Junlong Li, Chaoxing Wu, Yongai Zhang, Xiongtu Zhou and Tailiang Guo
Nanomaterials 2022, 12(6), 912; https://doi.org/10.3390/nano12060912 - 10 Mar 2022
Cited by 16 | Viewed by 2845
Abstract
Non-electrical contact and non-carrier injection (NEC&NCI) mode is an emerging driving mode for nanoscale light-emitting diodes (LEDs), aiming for applications in nano-pixel light-emitting displays (NLEDs). However, the working mechanism of nano-LED operating in NEC&NCI mode is not clear yet. In particular, the questions [...] Read more.
Non-electrical contact and non-carrier injection (NEC&NCI) mode is an emerging driving mode for nanoscale light-emitting diodes (LEDs), aiming for applications in nano-pixel light-emitting displays (NLEDs). However, the working mechanism of nano-LED operating in NEC&NCI mode is not clear yet. In particular, the questions comes down to how the inherent holes and electrons in the LED can support sufficient radiation recombination, which lacks a direct physical picture. In this work, a finite element simulation was used to study the working process of the nano-LED operating in the NEC&NCI mode to explore the working mechanisms. The energy band variation, carrier concentration redistribution, emission rate, emission spectrum, and current-voltage characteristics are studied. Moreover, the effect of the thickness of insulating layer that plays a key role on device performance is demonstrated. We believe this work can provide simulation guidance for a follow-up study of NEC&NCI-LED. Full article
(This article belongs to the Special Issue Nanomaterials and Nanofabrication for High Resolution Luminescence Array)
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