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Advanced Research on Low-Dimensional Optoelectronic Nanomaterials and Nanodevices

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

Deadline for manuscript submissions: 20 October 2024 | Viewed by 2674

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Special Issue Editor

Dr. Shiliang Mei

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Guest Editor

Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Interests: quantum dots; metal halide perovskites; ultrafast spectroscopy; electroluminescent devices; advanced display technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Low-dimensional nanomaterials, such as quantum dots, nanotubes, nanowires, and 2D materials, have attracted extensive research attention because of their unique quantum confinement effect. Their novel optical and photophysical properties endow them with many promising nanodevice applications, such as light-emitting diodes, lasers, solar cells, and luminescent memristors. Nevertheless, there are still many issues with low-dimensional optoelectronic nanomaterials, such as fundamental photophysical understanding, stability, and device performance, which must be addressed and investigated further.

This Special Issue aims to provide an overview of the most recent developments in novel low-dimensional optoelectronic nanomaterials and nanodevices. Original research articles, reviews, and perspectives are welcome. Research areas may include (but are not limited to) the following:

Synthesis of low-dimensional optoelectronic nanomaterials such as quantum dots, metal halide perovskites, and quantum-dot-luminescent glasses;
Optical and photophysical properties of low-dimensional optoelectronic nanomaterials;
Nanodevice applications in light-emitting diodes, lasers, solar cells, and luminescent memristors.

We sincerely hope that this Special Issue will improve the understanding of researchers regarding the latest progress in this field, and encourage even broader research on novel low-dimensional optoelectronic nanomaterials and nanodevices.

We are looking forward to receiving your contributions.

Dr. Shiliang Mei
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

optoelectronic
low-dimensional nanomaterials
quantum dots
metal halide perovskites
carbon dots
quantum-dot-luminescent glass
photophysical properties
light-emitting diodes
lasers
solar cells
luminescent memristor

Published Papers (3 papers)

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Research

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17 pages, 5118 KiB

Open AccessArticle

Utilizing Gold Nanoparticle Decoration for Enhanced UV Photodetection in CdS Thin Films Fabricated by Pulsed Laser Deposition: Exploiting Plasmon-Induced Effects

by Walid Belaid, Serap Yiğit Gezgin, Mohamed A. Basyooni-M. Kabatas, Yasin Ramazan Eker and Hamdi Şükür Kiliç

Nanomaterials 2024, 14(5), 416; https://doi.org/10.3390/nano14050416 - 24 Feb 2024

Viewed by 685

Abstract

UV sensors hold significant promise for various applications in both military and civilian domains. However, achieving exceptional detectivity, responsivity, and rapid rise/decay times remains a notable challenge. In this study, we address this challenge by investigating the photodetection properties of CdS thin films and the influence of surface-deposited gold nanoparticles (AuNPs) on their performance. CdS thin films were produced using the pulsed laser deposition (PLD) technique on glass substrates, with CdS layers at a 100, 150, and 200 nm thickness. Extensive characterization was performed to evaluate the thin films’ structural, morphological, and optical properties. Photodetector devices based on CdS and AuNPs/CdS films were fabricated, and their performance parameters were evaluated under 365 nm light illumination. Our findings demonstrated that reducing CdS layer thickness enhanced performance concerning detectivity, responsivity, external quantum efficiency (EQE), and photocurrent gain. Furthermore, AuNP deposition on the surface of CdS films exhibited a substantial influence, especially on devices with thinner CdS layers. Among the configurations, AuNPs/CdS(100 nm) demonstrated the highest values in all evaluated parameters, including detectivity (

1.1 \times 10^{12}

Jones), responsivity (13.86 A/W), EQE (47.2%), and photocurrent gain (9.2). Full article

(This article belongs to the Special Issue Advanced Research on Low-Dimensional Optoelectronic Nanomaterials and Nanodevices)

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16 pages, 5037 KiB

Open AccessArticle

Bicarbazole-Benzophenone-Based Twisted Donor-Acceptor-Donor Derivatives as Blue Emitters for Highly Efficient Fluorescent Organic Light-Emitting Diodes

by Dovydas Blazevicius, Iram Siddiqui, Prakalp Gautam, Gintare Krucaite, Daiva Tavgeniene, Mangey Ram Nagar, Krishan Kumar, Subrata Banik, Jwo-Huei Jou and Saulius Grigalevicius

Nanomaterials 2024, 14(2), 146; https://doi.org/10.3390/nano14020146 - 09 Jan 2024

Cited by 1 | Viewed by 881

Abstract

This paper delves into the development of a group of twisted donor-acceptor-donor (D-A-D) derivatives incorporating bicarbazole as electron donor and benzophenone as electron acceptor for potential use as blue emitters in OLEDs. The derivatives were synthesized in a reaction of 4,4′-difluorobenzophenone with various 9-alkyl-9′H-3,3′-bicarbazoles. The materials, namely, DB14, DB23, and DB29, were designed with different alkyl side chains to enhance their solubility and film-forming properties of layers formed using the spin-coating from solution method. The new materials demonstrate high thermal stabilities with decomposition temperatures >383 °C, glass transition temperatures in the range of 95–145 °C, high blue photoluminescence quantum yields (>52%), and short decay times, which range in nanoseconds. Due to their characteristics, the derivatives were used as blue emitters in OLED devices. Some of the OLEDs incorporating the DB23 emitter demonstrated a high external quantum efficiency (EQE_max) of 5.3%, which is very similar to the theoretical limit of the first-generation devices. Full article

(This article belongs to the Special Issue Advanced Research on Low-Dimensional Optoelectronic Nanomaterials and Nanodevices)

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Review

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35 pages, 1758 KiB

Open AccessFeature PaperReview

A Review of Benzophenone-Based Derivatives for Organic Light-Emitting Diodes

by Dovydas Blazevicius and Saulius Grigalevicius

Nanomaterials 2024, 14(4), 356; https://doi.org/10.3390/nano14040356 - 14 Feb 2024

Viewed by 878

Abstract

Organic light-emitting diodes (OLEDs) have garnered considerable attention in academic and industrial circles due to their potential applications in flat-panel displays and solid-state lighting technologies, leveraging the advantages offered by organic electroactive derivatives over their inorganic counterparts. The thin and flexible design of OLEDs enables the development of innovative lighting solutions, facilitating the creation of customizable and contoured lighting panels. Among the diverse electroactive components employed in the molecular design of OLED materials, the benzophenone core has attracted much attention as a fragment for the synthesis of organic semiconductors. On the other hand, benzophenone also functions as a classical phosphor with high intersystem crossing efficiency. This characteristic makes it a compelling candidate for effective reverse intersystem crossing, with potential in leading to the development of thermally activated delayed fluorescent (TADF) emitters. These emitting materials witnessed a pronounced interest in recent years due to their incorporation in metal-free electroactive frameworks and the capability to convert triplet excitons into emissive singlet excitons through reverse intersystem crossing (RISC), consequently achieving exceptionally high external quantum efficiencies (EQEs). This review article comprehensively overviews the synthetic pathways, thermal characteristics, electrochemical behaviour, and photophysical properties of derivatives based on benzophenone. Furthermore, we explore their applications in OLED devices, both as host materials and emitters, shedding light on the promising opportunities that benzophenone-based compounds present in advancing OLED technology. Full article

(This article belongs to the Special Issue Advanced Research on Low-Dimensional Optoelectronic Nanomaterials and Nanodevices)

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