Special Issue "Advances in Transparent Conducting Materials"
Deadline for manuscript submissions: closed (31 May 2017)
Prof. Dr. Andrea Li Bassi
Professor of Physics of Matter, Department of Energy, Politecnico di Milano, via Ponzio 34/3, 20133 Milano, Italy
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Interests: synthesis of nanostructured functional surfaces for energy applications, in particular by pulsed laser deposition (PLD); scanning tunneling microscopy and spectroscopy of supported clusters and nanostructured surfaces; raman scattering from carbon-based and metal oxide nanostructured systems
Prof. Dr. Carlo S. Casari
Associate Professor of Physics of Matter, Department of Energy, Politecnico di Milano, via Ponzio 34/3, 20133 Milano, Italy
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Interests: nanostructured material growth; carbon nanostructures; structure, vibrational and electronic properties; nanostructured oxides for energy applications
Transparent conducting materials (TCM) are being investigated for the development of transparent electrodes in a wide variety of applications, ranging from photovoltaics and photocatalysis, photoelectrochemistry, transparent electronics, optoelectronics and light emitting diodes, to smart windows, flat panel displays, and touch screens.
Typically, conductivity of transparent materials is obtained by strong (degenerate) doping of wide-bandgap oxides. Traditionally, the most studied TCM are, thus, transparent conducting oxides (TCO) and some of them are commercially available and widely employed. However, current research involving different fields (from physics and chemistry to materials science and nanotechnology) still devotes extensive and renewed attention to this class of materials for a number of reasons:
- the improvement of the material properties and performance often requires a compromise between electrical conductivity and transparency in different regions of the electromagnetic spectrum, so that there is still room for material optimization depending on the desired applications;
- new TCM are today investigated or searched for, e.g., for cost reduction (In-free TCO; synthesis by solution processing instead of vacuum vapor deposition techniques); to address material stability in aggressive environments (e.g., TiO2-based TCO for photoelectrochemical applications); to realize non-oxide TCM, based for instance on metal nanowire (NW) networks or 2D materials such as graphene; to develop p-type TCM (which are still far from applications but would be necessary, e.g., to realize transparent p-n junctions);
- achievement of novel, additional functional properties beyond electrical conduction and transparency is often desirable: e.g. compatibility with plastic substrates or flexibility (amorphous TCOs, metal NWs, graphene), which requires low processing/synthesis temperatures; light scattering/trapping capability, that can be obtained by morphology modulation at the nano/mesoscale (e.g., using hierarchical nanostructures); large surface area/interface for the realization of diffuse heterojunctions, e.g., in organic/hybrid solar or photocatalysis devices; implementation of IR plasmonic effect; etc.;
- a better understanding of the TCM physics, e.g., in terms of comprehension of the relationship between the complex and non-trivial defect chemistry and the electronic/optical functional properties, which of course would open the way to the possibility of a better engineering/tailoring of the properties.
This Special Issue is open to original and relevant contributions in this growing and strongly interdisciplinary field, addressing different aspects from synthesis, comprehension, material development, demonstration of novel functionalities, novel applications.
Prof. Dr. Andrea Li Bassi
Prof. Dr. Carlo Spartaco Casari
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 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 1500 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.
- multifunctional TCM
- p-type TCO
- non-oxide TCM
- nanostructure-based approaches to TCM
- defect chemistry of TCO
- hierarchical nanostructures/mesoporous TCM
- photovoltaics/photocatalysis applications of TCM
- organic/hybrid devices
- transparent electronics
- TCM dielectrics
- growth techniques
- characterization techniques
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Transparent electrodes based on silver nanowire networks: from physical considerations towards device integration
Authors: D. Bellet1,*, T. Sannicolo1,2, D.P. Langley3, M. Lagrange1,4, S. Aghazadehchors1,5, D. Muñoz-Rojas1, C. Jiménez1, Y. Bréchet6, N. D. Nguyen5
Affiliations: 1Univ. Grenoble Alpes, CNRS, LMGP, F-38016, Grenoble, France
2 Univ. Grenoble Alpes, CEA, LITEN, F-38054 Grenoble, France.
3 ARC Centre of Excellence for Advanced Molecular Imaging, Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia.
4 Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, F-38054 Grenoble, France.
5 Laboratoire de Physique des Solides, Interfaces et Nanostructures Université de Liège, B-4000 Liège, Belgium.
6 Univ. Grenoble Alpes, CNRS, SIMAP, F-38000 Grenoble, France
Abstract: The past few years have seen a considerable amount of research devoted to nanostructured transparent conducting materials which play a pivotal role in many modern devices such as: solar cells, flexible light-emitting devices, touch screens, electromagnetic devices or flexible transparent thin film heaters. Currently, the most commonly used material for such applications (ITO: Tin-doped Indium oxide) suffers from two major drawbacks: indium scarcity and brittleness.
Among emerging transparent electrodes, silver nanowire (AgNW) networks appear as a promising substitute to ITO since these percolating networks exhibit excellent properties with sheet resistance of a few Ω/sq and optical transparency of 90%, fulfilling the requirements for many applications. It also shows very good electro-mechanical properties. In addition, the fabrication of these electrodes involves low-temperature process steps and upscaling methods, thus making them very appropriate for future use as TE for flexible devices. Their main properties, the influence of post treatments  or the network density and nanowire size  but as well their stability will be discussed, thanks to both experimental and numerical approaches. Some applications will be developed such as their use as transparent heaters  or in solar cells .
This contribution aims at presenting briefly the main properties of transparent electrodes as well as the challenges which still remain in front of us in terms of efficient integration in devices.