Innovations in Nano-Based Optoelectronic Devices

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

Deadline for manuscript submissions: closed (10 September 2024) | Viewed by 2079

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School of Materials Science and Engineering, Northwestern Polytechnical University, Youyi West Road 127#, Xi’an, China
Interests: semiconductors; devices; two-dimensional materials; optoelectronics; strain engineering; metal-semiconductor contacts; van der Waals heterostructures
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Dear Colleagues,

Innovations in nano-based optoelectronic devices represent a significant advancement in the field of materials science and engineering, harnessing the unique properties of nanomaterials to revolutionize the way light is generated, manipulated, and detected. These devices, which include solar cells, LEDs, photodetectors, and lasers, benefit from the enhanced electrical, optical, and mechanical properties of nanoscale materials, such as quantum dots, nanowires, and graphene.

At the core of these innovations is the ability to control the interaction between light and matter on an unprecedented scale. For example, quantum dots can be tuned to emit or absorb specific wavelengths of light, enabling highly efficient LEDs and solar cells with the potential for a wider color range and increased energy conversion efficiency. Similarly, the use of nanowires and graphene in photodetectors and transistors has led to devices with faster response times and higher sensitivity, which are critical for telecommunications and imaging applications.

Moreover, the integration of these nanostructures into optoelectronic devices paves the way for the development of flexible, lightweight, and even transparent electronics, opening up new applications in wearable technology, smart windows, and beyond. The ongoing research and development in nano-based optoelectronics promise not only to enhance the performance of existing technologies but also to create entirely new functionalities and applications, underscoring the transformative potential of nanotechnology in the modern world.

Dr. Qinghua Zhao
Guest Editor

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Keywords

  • nanotechnology
  • optoelectronics
  • photodetectors
  • plasmonic
  • LEDs
  • solar cells
  • light–matter interactions

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Published Papers (2 papers)

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Research

16 pages, 5004 KiB  
Article
Research on CdSe/ZnS Quantum Dots-Doped Polymer Fibers and Their Gain Characteristics
by Xuefeng Peng, Zhijian Wu and Yang Ding
Nanomaterials 2024, 14(17), 1463; https://doi.org/10.3390/nano14171463 - 9 Sep 2024
Viewed by 727
Abstract
Polymer fibers are considered ideal transmission media for all-optical networks, but their high intrinsic loss significantly limits their practical use. Quantum dot-doped polymer fiber amplifiers are emerging as a promising solution to this issue and are becoming a significant focus of research in [...] Read more.
Polymer fibers are considered ideal transmission media for all-optical networks, but their high intrinsic loss significantly limits their practical use. Quantum dot-doped polymer fiber amplifiers are emerging as a promising solution to this issue and are becoming a significant focus of research in both academia and industry. Based on the properties of CdSe/ZnS quantum dots and PMMA material, this study experimentally explores three fabrication methods for CdSe/ZnS quantum dots-doped PMMA fibers: hollow fiber filling, melt-drawing, and melt extrusion. The advantages and disadvantages of each method and key issues in fiber fabrication are analyzed. Utilizing the CdSe/ZnS quantum dots-doped PMMA fibers that were fabricated, we theoretically analyzed the key factors affecting gain performance, including fiber length, quantum dots doping concentration, and signal light intensity. Under the conditions of 1.5 W power and 445 nm laser pumping, a maximum on-off gain of 16.2 dB was experimentally achieved at 635 nm. Additionally, using a white light LED as the signal source, a broadband on-off gain with a bandwidth exceeding 70 nm and a maximum gain of 12.4 dB was observed in the 580–650 nm range. This research will contribute to the development of quantum dots-doped fiber devices and broadband optical communication technology, providing more efficient solutions for future optical communication networks. Full article
(This article belongs to the Special Issue Innovations in Nano-Based Optoelectronic Devices)
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6 pages, 1572 KiB  
Article
Quantum Prism—Nano Source of Light with Dispersive Spectrum and Optical Upconversion
by Arturs Medvids, Patrik Ščajev, Saulius Miasojedovas and Kazuhiko Hara
Nanomaterials 2024, 14(15), 1277; https://doi.org/10.3390/nano14151277 - 30 Jul 2024
Cited by 1 | Viewed by 992
Abstract
A quantum prism, a new structure, consisting of many quantum wires with a diameter that gradually decreases from the base to the top, is the focus of our research. This distribution of quantum wires leads to a dispersive emitted spectrum. The red edge [...] Read more.
A quantum prism, a new structure, consisting of many quantum wires with a diameter that gradually decreases from the base to the top, is the focus of our research. This distribution of quantum wires leads to a dispersive emitted spectrum. The red edge of the spectrum is determined by the band gap width of the bulk semiconductor, and the blue edge is determined by the quantum size of the excitons at the top of the prism. The PL spectrum of the silicon prismatic sample was excited by weak and strong light absorption. At weak absorption (hνex = 1.2 eV), the PL spectrum is located in the visible part of the spectrum, from 1.4 eV to 1.9 eV, with an energy higher than the band gap of the Si crystal. Such a “blue shift” of PL spectra by 0.7 eV is characteristic of the quantum confinement effect. It is a rainbow spectrum with an optical upconversion. The quantum prism is a new type of nano light source, as it replaces two elements in a conventional spectrometer: a light source and a dispersive element. These features enable to create a nano-spectrometer for measuring the absorption spectrum of individual molecules or viruses. Full article
(This article belongs to the Special Issue Innovations in Nano-Based Optoelectronic Devices)
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