Special Issue "Advanced Materials for Photonics and Photovoltaics Applications"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Optics and Photonics".

Deadline for manuscript submissions: 31 October 2020.

Special Issue Editors

Prof. Fernando B. Naranjo
Website
Guest Editor
EPS (GRIFO), Alcala de Henares, Spain
Interests: III-nitrides, deposition by RF sputtering, optoelectronic devices, mode-locked lasers, saturable absorbers
Dr. Susana Mª Fernandez
Website
Guest Editor
Center for Energy, Environmental and Technological Research, Spain
Interests: transparent conductive oxides, deposition by RF magnetron sputtering, electrodes, antireflectance layer, silicon-based photovoltaic devices
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Special Issue Information

Dear Colleagues,

Photonics is a key enabling technology applicable in several fields capable of changing society. It is, therefore, emerging as a powerful driving force able to overcome present challenges. Cutting-edge materials and technologies are required to develop the photonic platforms needed to implement these novel solutions. Recently, low-dimensional systems based on graphene-related, organic, and semiconductor materials have attracted interest as a way to cope with photonics system challenges.

An important application of photonics is energy harvesting and generation using photovoltaic devices. In this area, conventional and well-established technologies are used with recently-developed materials, like perovskites (novel strategies for light trapping) and novel TCO materials (developed as possible substitutes for ITO), and represent the backbone of novel photovoltaic devices capable of overcomimg acepted limitations.

This Special Issue, with a collection of articles containg the most recent results and findings related to this exciting research area, aims to present the recent developments in photonic materials in several fields of applications, such as photonics integrated circuits, organic photonics, ultrafast photonics, and, especially, photovoltaics.

Prof. Fernando B. Naranjo
Dr. Susana Fernandez
Guest Editors

Manuscript Submission Information

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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 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

  • optoelectronic devices
  • solar cells
  • photonic devices
  • nanophotonics
  • photonic integrated circuits
  • photonic materials

Published Papers (5 papers)

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Open AccessArticle
How Reproducible are Electrochemical Impedance Spectroscopic Data for Dye-Sensitized Solar Cells?
Materials 2020, 13(7), 1547; https://doi.org/10.3390/ma13071547 - 27 Mar 2020
Abstract
Dye-sensitized solar cell (DSC) technology has been broadly investigated over the past few decades. The sandwich-type structure of the DSC makes the manufacturing undemanding under laboratory conditions but results in the need for reproducible measurements for acceptable DSC characterization. Electrochemical impedance spectroscopy (EIS) [...] Read more.
Dye-sensitized solar cell (DSC) technology has been broadly investigated over the past few decades. The sandwich-type structure of the DSC makes the manufacturing undemanding under laboratory conditions but results in the need for reproducible measurements for acceptable DSC characterization. Electrochemical impedance spectroscopy (EIS) offers the possibility to study complex electronic systems and is commonly used for solar cells. There is a tendency in the literature to present impedance data only for one representative device. At the same time, as current density–voltage plots illustrate, measurements can vary within one set of DSCs with identical components. We present multiple DSC impedance measurements on “identical” devices prepared using two different dyes and present a statistical analysis regarding the reproducibility. Full article
(This article belongs to the Special Issue Advanced Materials for Photonics and Photovoltaics Applications)
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Open AccessArticle
There Is a Future for N-Heterocyclic Carbene Iron(II) Dyes in Dye-Sensitized Solar Cells: Improving Performance through Changes in the Electrolyte
Materials 2019, 12(24), 4181; https://doi.org/10.3390/ma12244181 - 12 Dec 2019
Cited by 2
Abstract
By systematic tuning of the components of the electrolyte, the performances of dye-sensitized solar cells (DSCs) with an N-heterocyclic carbene iron(II) dye have been significantly improved. The beneficial effects of an increased Li+ ion concentration in the electrolyte lead to photoconversion [...] Read more.
By systematic tuning of the components of the electrolyte, the performances of dye-sensitized solar cells (DSCs) with an N-heterocyclic carbene iron(II) dye have been significantly improved. The beneficial effects of an increased Li+ ion concentration in the electrolyte lead to photoconversion efficiencies (PCEs) up to 0.66% for fully masked cells (representing 11.8% relative to 100% set for N719) and an external quantum efficiency maximum (EQEmax) up to approximately 25% due to an increased short-circuit current density (JSC). A study of the effects of varying the length of the alkyl chain in 1-alkyl-3-methylimidazolium iodide ionic liquids (ILs) shows that a longer chain results in an increase in JSC with an overall efficiency up to 0.61% (10.9% relative to N719 set at 100%) on going from n-methyl to n-butyl chain, although an n-hexyl chain leads to no further gain in PCE. The results of electrochemical impedance spectroscopy (EIS) support the trends in JSC and open-circuit voltage (VOC) parameters. A change in the counterion from I to [BF4] for 1-propyl-3-methylimidazolium iodide ionic liquid leads to DSCs with a remarkably high JSC value for an N-heterocyclic carbene iron(II) dye of 4.90 mA cm−2, but a low VOC of 244 mV. Our investigations have shown that an increased concentration of Li+ in combination with an optimized alkyl chain length in the 1-alkyl-3-methylimidazolium iodide IL in the electrolyte leads to iron(II)-sensitized DSC performances comparable with those of containing some copper(I)-based dyes. Full article
(This article belongs to the Special Issue Advanced Materials for Photonics and Photovoltaics Applications)
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Open AccessArticle
The Size Effect of TiO2 Hollow Microspheres on Photovoltaic Performance of ZnS/CdS Quantum Dots Sensitized Solar Cell
by Zhen Li and Libo Yu
Materials 2019, 12(10), 1583; https://doi.org/10.3390/ma12101583 - 15 May 2019
Cited by 3
Abstract
Size controllable TiO2 hollow microspheres (HMS) were synthesized by a carbonaceous spheres (CS) template method. Based on TiO2 HMS, the ZnS/CdS quantum dots (QDs) were loaded to form a ZnS/[email protected]2 HMS photoanode for quantum dots sensitized solar cell (QDSSC). The [...] Read more.
Size controllable TiO2 hollow microspheres (HMS) were synthesized by a carbonaceous spheres (CS) template method. Based on TiO2 HMS, the ZnS/CdS quantum dots (QDs) were loaded to form a ZnS/[email protected]2 HMS photoanode for quantum dots sensitized solar cell (QDSSC). The size effects of TiO2 HMS on photovoltaic performance were investigated, and showed that TiO2 HMS with sizes ~560 nm produced the best short-circuit current density (Jsc) of 8.02 mA cm−2 and highest power conversion efficiency (PCE) of 1.83%, showing a better photovoltaic performance than any other QDSSCs based on TiO2 HMS with size ~330 nm, ~400 nm, and ~700 nm. The improvement of photovoltaic performance based on ~560 nm TiO2 HMS which can be ascribed to the enhanced light harvesting efficiency caused by multiple light reflection and strong light scattering of TiO2 HMS. The ultraviolet-visible (UV-vis) spectra and incident photo to the current conversion efficiency (IPCE) test results confirmed that the size of TiO2 HMS has an obvious effect on light harvesting efficiency. A further application of ~560 nm TiO2 HMS in ZnS/PbS/CdS QDSSC can improve the PCE to 2.73%, showing that TiO2 HMS has wide applicability in the design of QDSSCs. Full article
(This article belongs to the Special Issue Advanced Materials for Photonics and Photovoltaics Applications)
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Open AccessArticle
High-Quality Perovskite CH3NH3PbI3 Thin Films for Solar Cells Prepared by Single-Source Thermal Evaporation Combined with Solvent Treatment
Materials 2019, 12(8), 1237; https://doi.org/10.3390/ma12081237 - 15 Apr 2019
Cited by 2
Abstract
In this work, solvent annealing process for CH3NH3PbI3 thin film prepared by single source evaporation was reported. Characterized by the scanning electron microscope (SEM), X-ray diffractometer (XRD), energy dispersive spectroscope (EDS), ultraviolet-visible (UV) spectrophotometer, and the photoluminescence (PL) [...] Read more.
In this work, solvent annealing process for CH3NH3PbI3 thin film prepared by single source evaporation was reported. Characterized by the scanning electron microscope (SEM), X-ray diffractometer (XRD), energy dispersive spectroscope (EDS), ultraviolet-visible (UV) spectrophotometer, and the photoluminescence (PL) spectrometer, our method ensured higher quality film with crystallinity, composition, well-defined grain structure, and reproducibility. The optimized solar cell device based on the structure of ITO/PEDOT:PSS/CH3NH3PbI3/PCBM/Ag achieved better performance in power conversion efficiency from 2.64% to 9.92%, providing an effective method to optimize the quality of perovskite film for solar cell application. Full article
(This article belongs to the Special Issue Advanced Materials for Photonics and Photovoltaics Applications)
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Open AccessComment
Comment on “Dual-Band Perfect Metamaterial Absorber Based on an Asymmetric H-Shaped Structure for Terahertz Waves [Materials] (2018) [2193; https://doi.org/10.3390/ma11112193]”
Materials 2019, 12(23), 3914; https://doi.org/10.3390/ma12233914 - 27 Nov 2019
Abstract
In a recent publication, Lu et al [...] Full article
(This article belongs to the Special Issue Advanced Materials for Photonics and Photovoltaics Applications)
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