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Nanomaterials
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Current Research in Organic Optoelectronic Nanomaterials, Semiconductors and Devices
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Current Research in Organic Optoelectronic Nanomaterials, Semiconductors and Devices

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

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 2715

Special Issue Editor

Prof. Dr. Shuai Wang

E-Mail Website
Guest Editor
School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: confined chemistry; carbon-based functional materials; graphene; printing technology

Special Issue Information

Dear Colleagues,

Nanomaterials and Nanotechnology have played a pivotal role in driving the continuous development of optoelectronic technologies, which include organic optoelectronic applications. Due to the superior optical, electrical, and optoelectrical properties, an increasing amount of scholarly research has been undertaken on optoelectronic nanomaterials and their applications. Recently, new organic optoelectronic materials and devices have been rapidly developed for practical applications, including organic solar cells, photodetectors, light-emitting devices (LEDs), phototransistors, etc.

This Special Issue will present current research in organic optoelectronic nanomaterials and devices, from the theory, design, synthesis, and characterization of novel organic nanomaterials, as well as the performance, characterization, and application of nanodevices in chemistry, physics, and engineering.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • Synthesis and preparation of organic nanomaterials;
  • Optical, electrical, and optoelectrical properties of organic nanomaterials;
  • Applications of optoelectronic nanomaterials and devices such as solar cells, detectors, LEDs, sensors etc.

We look forward to receiving your contributions.

Prof. Dr. Shuai Wang
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

  • organic optoelectronic nanomaterials
  • organic semiconductors
  • organic nanodevices
  • organic solar cells
  • organic photodetectors
  • organic light-emitting devices (OLEDs)
  • organic phototransistors

Published Papers (2 papers)

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Research

18 pages, 20959 KiB  
Article
Organic Disordered Semiconductors as Networks Embedded in Space and Energy
by Lucas Cuadra, Sancho Salcedo-Sanz and José Carlos Nieto-Borge
Nanomaterials 2022, 12(23), 4279; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12234279 - 01 Dec 2022
Cited by 1 | Viewed by 1178
Abstract
Organic disordered semiconductors have a growing importance because of their low cost, mechanical flexibility, and multiple applications in thermoelectric devices, biosensors, and optoelectronic devices. Carrier transport consists of variable-range hopping between localized quantum states, which are disordered in both space and energy within [...] Read more.
Organic disordered semiconductors have a growing importance because of their low cost, mechanical flexibility, and multiple applications in thermoelectric devices, biosensors, and optoelectronic devices. Carrier transport consists of variable-range hopping between localized quantum states, which are disordered in both space and energy within the Gaussian disorder model. In this paper, we model an organic disordered semiconductor system as a network embedded in both space and energy so that a node represents a localized state while a link encodes the probability (or, equivalently, the Miller–Abrahams hopping rate) for carriers to hop between nodes. The associated network Laplacian matrix allows for the study of carrier dynamics using edge-centric random walks, in which links are activated by the corresponding carrier hopping rates. Our simulation work suggests that at room temperature the network exhibits a strong propensity for small-network nature, a beneficial property that in network science is related to the ease of exchanging information, particles, or energy in many different systems. However, this is not the case at low temperature. Our analysis suggests that there could be a parallelism between the well-known dependence of carrier mobility on temperature and the potential emergence of the small-world property with increasing temperature. Full article
(This article belongs to the Special Issue Current Research in Organic Optoelectronic Nanomaterials, Semiconductors and Devices)
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12 pages, 2561 KiB  
Article
Exciton Up-Conversion by Well-Distributed Carbon Quantum Dots in Luminescent Materials for an Efficient Organic Light-Emitting Diode
by Zingway Pei, Han-Yun Wei and Yi-Chun Liu
Nanomaterials 2022, 12(7), 1174; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12071174 - 01 Apr 2022
Cited by 1 | Viewed by 1949
Abstract
In this work, we proposed an efficient and straightforward up-conversion process to enhance the external quantum efficiency in a red-emission organic light-emitting diode (OLED). The carbon quantum dots in the luminescent materials initiated the up-conversion by doping the (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) [...] Read more.
In this work, we proposed an efficient and straightforward up-conversion process to enhance the external quantum efficiency in a red-emission organic light-emitting diode (OLED). The carbon quantum dots in the luminescent materials initiated the up-conversion by doping the (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) in an amount of 0.001 wt. %, and the external quantum efficiency (EQE) increased from approximately 80% to 9.27% without spectrum change. The time-resolved photoluminescence was applied to understand the mechanism of EQE enhancement in the PCBM-doped OLED. Two decay-time constants fit the TRPL. After PCBM doping, the extended PL intensity indicated increased time constants. The time constants increased from 1.06 and 4.02 ns of the reference sample to 3.48 and 11.29 ns of the PCBM-doped material, respectively. The nonradiative energy transfer (NRET) mechanism was proposed responsible for the decay-time enhancement. The excitons in the PCBM, either by excitation or injection, will transfer to the phosphorescent material nonradiatively. As the PCBM has lower energy levels than the luminous material for electrons, the backward exciton transfer is a kind of up-conversion. With the increased amounts of excitons in the luminescent material, the luminescent external quantum efficiency and the decay-time increased. This up-conversion method is not limited to the red-emission OLED; it could also be applied to blue or green emission. Full article
(This article belongs to the Special Issue Current Research in Organic Optoelectronic Nanomaterials, Semiconductors and Devices)
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