Special Issue "II-VI Semiconductor Nanocrystals and Hybrid Polymer-Nanocrystal Systems"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: 31 October 2020.

Special Issue Editor

Dr. Marco Anni
Website
Guest Editor
Dipartimento di Matematica e Fisica "Ennio de Giorgi", Università del Salento, Italy
Interests: perovskites; conjugated molecules; Amplified Spontaneous Emission; optical gain; laser; photoluminescence; confocal microscopy
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Special Issue Information

Dear Colleagues,

II-VI semiconductor nanocrystals and hybrids polymer–nanocrystal systems have been subject of intense interdisciplinary research activity in the last few years.

This research includes the development of synthesis protocols for obtaining nanocrystals with high control of chemical composition, shape, size and optical and electronic properties, the investigation of the electronic properties by a wide range of advanced spectroscopic techniques and the demonstration and optimization of a wide range of devices, such as light emitting diodes, solar cells, optically-pumped lasers, and sensors. Moreover the combination of nanocrystals with organic polymers allows the development of novel functional materials combining the best properties of the components and thus with performances improved with respect to the ones of the individual components.

This Special Issue of Nanomaterials aims to describe the state-of-the-art and the recent advances of the synthesis methods of II-VI nanocrystals, of the photophysics investigation of their electronic properties and of their possible applications in photonic and optoelectronic devices.

Research articles, review articles, as well as short communications, are invited.

Dr. Marco Anni
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 papers will be 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 monthly 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 2000 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

  • Colloidal synthesis
  • Ultrafast Spectroscopy
  • Single emitter Spectroscopy
  • Optically pumped Lasers
  • Light Emitting Diodes
  • Solar cells
  • Biomarkers
  • semiconductor nanocrystals
  • hybrids polymer–nanocrystal
  • nanodevices

Published Papers (3 papers)

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Research

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Open AccessArticle
Expanded Electroluminescence in High Load CdS Nanocrystals PVK-Based LEDs
Nanomaterials 2019, 9(9), 1212; https://doi.org/10.3390/nano9091212 - 28 Aug 2019
Cited by 3
Abstract
Immiscibility between dimethyl sulfoxide (DMSO) and polar solvents used for poly(N-vinylcarbazole) (PVK) solutions, leads to failed light-emitting diodes when colloidal cadmium sulfide (CdS) nanoparticles capped with thiophenol are incorporated to their active layer. To prevent this, a heat treatment is applied [...] Read more.
Immiscibility between dimethyl sulfoxide (DMSO) and polar solvents used for poly(N-vinylcarbazole) (PVK) solutions, leads to failed light-emitting diodes when colloidal cadmium sulfide (CdS) nanoparticles capped with thiophenol are incorporated to their active layer. To prevent this, a heat treatment is applied to the CdS nanoparticles in order to evaporate DMSO solvent. After evaporation most of the nanoparticles increased their size, and some of them show hexagonal crystalline structure instead of the original cubic zinc-blende observed in colloidal pre-treated nanoparticles. Nevertheless, enhanced electronic properties are measured in light-emitting devices when DMSO-free nanoparticles are embedded in the poly(N-vinylcarbazole) active layer. Light emission from these hybrid devices comprises the whole visible range of wavelengths as searched for white LEDs. Moreover, electroluminescence from both types of CdS nanoparticles (smaller cubic and bigger hexagonal) has been discriminated and interpreted through Gaussian deconvolution. Full article
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Open AccessArticle
Diameter- and Length-controlled Synthesis of Ultrathin ZnS Nanowires and Their Size-Dependent UV Absorption Properties, Photocatalytical Activities and Band-Edge Energy Levels
Nanomaterials 2019, 9(2), 220; https://doi.org/10.3390/nano9020220 - 07 Feb 2019
Cited by 2
Abstract
Benefiting from their ultra-small diameters and highly structural anisotropies, ultrathin semiconductor nanowires (USNWs) are well-known for their fascinating physical/chemical properties, as well as their promising applications in various fields. However, until now, it remains a challenge to synthesize high-quality USNWs with well-controlled diameters [...] Read more.
Benefiting from their ultra-small diameters and highly structural anisotropies, ultrathin semiconductor nanowires (USNWs) are well-known for their fascinating physical/chemical properties, as well as their promising applications in various fields. However, until now, it remains a challenge to synthesize high-quality USNWs with well-controlled diameters and lengths, let alone the exploration of their size-dependent properties and applications. To solve such a challenge, we report herein a ligand-induced low-temperature precursor thermolysis route for the controlled preparation of ultrathin ZnS nanowires, which is based on the oriented assembly of the in-situ formed ZnS clusters/tiny particles. Optimized synthetic conditions allowed the synthesis of ZnS nanowires with a diameter down to 1.0 nm and a length approaching 330 nm. The as-prepared ultrathin ZnS nanowires were then intensively examined by morphological, spectroscopic and electrochemical analytical means to explore their size-dependent optical absorption properties, photocatalytic activities and band-edge energy levels, as well as their underlying growth mechanism. Notably, these USNWs, especially for the thinnest nanowires, were identified to possess an excellent performance in both the selective absorption of ultraviolet (UV) light and photocatalytic degradation of dyes, thus enabling them to serve as longpass ultraviolet filters and high-efficiency photocatalysts, respectively. For the ultrathin ZnS nanowires with a diameter of 1.0 nm, it was also interesting to observe that their exciton absorption peak positions were kept almost unchanged during the continuous extension of their lengths, which has not been reported previously. Full article
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Review

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Open AccessFeature PaperReview
Polymer-II-VI Nanocrystals Blends: Basic Physics and Device Applications to Lasers and LEDs
Nanomaterials 2019, 9(7), 1036; https://doi.org/10.3390/nano9071036 - 19 Jul 2019
Cited by 4
Abstract
Hybrid thin films that combine organic conjugated molecules and semiconductors nanocrystals (NCs) have been deeply investigated in the previous years, due to their capability to provide an extremely broad tuning of their electronic and optical properties. In this paper we review the main [...] Read more.
Hybrid thin films that combine organic conjugated molecules and semiconductors nanocrystals (NCs) have been deeply investigated in the previous years, due to their capability to provide an extremely broad tuning of their electronic and optical properties. In this paper we review the main aspects of the basic physics of the organic–inorganic interaction and the actual state of the art of lasers and light emitting diodes based on hybrid active materials. Full article
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