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Special Issue "Quantum Dots and Applications"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 30 June 2019

Special Issue Editor

Guest Editor
Prof. Dr. Heesun Yang

Department of Materials Science and Engineering, Hongik University, 94, Wausan-ro, Mapo-gu, Seoul, Korea
Website | E-Mail
Interests: quantum dots; materials chemistry; photoluminescence; electroluminescence; light-emitting diode

Special Issue Information

Dear Colleagues,

Colloidal quantum dots (QDs) have been generating substantial interest due to their unique, beneficial attributes such as easy, wide tunability of visible-to-infrared emission wavelength, high fluorescent quantum yield, and low-cost solution-processibility. Thus, they are undoubtedly considered to be alternative emissive materials for next-generation optoelectronic and biological applications. Owning to the great synthetic advances of QDs and their in-depth photophysical understanding, they have entered the commercialization phase.

This Special Issue aims to provide recent, informative, QD-related resources for readers by addressing a broad range of topics from QD materials chemistry and characterization to processing and device fabrication. It will focus on not only the synthesis of colloidal QD materials with various semiconductor compositions such as II-VI, III-V, I-III-VI, and halide perovskite families; core/shell heterostructural engineering; and surface functionalization/encapsulation and photophysical investigation, but on their versatile applications such as down-conversion-, electroluminescence-based light-emitting diodes for display/lighting devices, luminescent solar concentrators, and biological labels.

We firmly believe that this collection will provide an opportunity to circulate innovative ideas and technologies on these emerging topics and contribute to the dissemination of expertise for young and leading researchers in the QD-related field.

Prof. Dr. Heesun Yang
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. Materials 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 1800 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 quantum dots
  • emissive materials
  • materials chemistry
  • optoelectronic

Published Papers (2 papers)

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Research

Open AccessArticle
A Novel Phototransistor Device with Dual Active Layers Composited of CsPbBr3 and ZnO Quantum Dots
Materials 2019, 12(8), 1215; https://doi.org/10.3390/ma12081215
Received: 14 March 2019 / Revised: 10 April 2019 / Accepted: 11 April 2019 / Published: 13 April 2019
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Abstract
Taking advantage of a large light absorption coefficient, long charge carrier diffusion length and low-cost solution processing, all-inorganic halides perovskite CsPbBr3 quantum dots (QDs) are combined with a ZnO QD film to construct a high-performance photodetector. In this work, a novel photodetector [...] Read more.
Taking advantage of a large light absorption coefficient, long charge carrier diffusion length and low-cost solution processing, all-inorganic halides perovskite CsPbBr3 quantum dots (QDs) are combined with a ZnO QD film to construct a high-performance photodetector. In this work, a novel photodetector device based on transistor structure with dual active layers composed of CsPbBr3 and ZnO film is proposed. In this structure, CsPbBr3 film functions as the light-absorbing layer and ZnO film acts as the conducting layer. Owing to the high electron mobility and hole-blocking nature of the ZnO QDs film, the photo-induced electron-hole pairs can be separated efficiently. As a result, the device exhibits high performance with response of 43.5 A/W, high detection up to 5.02 × 1011 Jones and on/off ratio of 5.6 × 104 under 365 nm light illumination. Compared with the ZnO-only phototransistor (the photodetector with the structure of transistor) the performance of the CsPbBr3 phototransistor showed significant improvement, which is superior to the majority of photodetectors prepared by perovskite. This work demonstrates that the ZnO QDs film can be applied in the photodetector device as a functional conducting layer, and we believe that the hybrid CsPbBr3/ZnO phototransistor would promote the development of low-cost and high-performance photodetectors. Full article
(This article belongs to the Special Issue Quantum Dots and Applications)
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Open AccessArticle
Visual Appearance of Nanocrystal-Based Luminescent Solar Concentrators
Materials 2019, 12(6), 885; https://doi.org/10.3390/ma12060885
Received: 14 February 2019 / Revised: 5 March 2019 / Accepted: 6 March 2019 / Published: 16 March 2019
PDF Full-text (4046 KB) | HTML Full-text | XML Full-text
Abstract
The luminescent solar concentrator (LSC) is a promising concept for the integration of photovoltaic (PV) generators into the building envelope. Having the form of semitransparent plates, LSCs offer a high degree of flexibility and can be used as windows or facades, as part [...] Read more.
The luminescent solar concentrator (LSC) is a promising concept for the integration of photovoltaic (PV) generators into the building envelope. Having the form of semitransparent plates, LSCs offer a high degree of flexibility and can be used as windows or facades, as part of the of building-integrated photovoltaic (BIPV) industry. Existing performance characterizations of LSC devices focus almost exclusively on electric power generation. However, when used as window components, the transmitted spectrum can alter the color, potentially affecting the visual comfort of the occupants by altering the properties of the sunlight. In this study, eight different state-of-the-art nanocrystals are evaluated as potential candidates for LSC window luminophores, using Monte Carlo simulations. The transparency of each LSC window varies between 90% and 50%, and the color-rendering properties are assessed with respect to the color rendering index (CRI) and the correlated color temperature (CCT). It is found that luminophores with a wide absorption bandwidth in the visible spectrum can maintain a high CRI value (above 85) and CCT values close to the Planckian locus, even for high luminophore concentrations. In contrast, luminophores that only absorb partly in the visible spectrum suffer from color distortion, a situation characterized by low CCT and CRI values, even at high transmittance. Full article
(This article belongs to the Special Issue Quantum Dots and Applications)
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