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Dr. José-Luis Maldonado

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Research Group of Optical Properties of Materials (GPOM), Centro de Investigaciones en Óptica (Optical Research Center), A.P. 1-948, 37150 León, Guanajuato, Mexico
Interests: organic electronics and photonics; organic photovoltaics; solar cells

Special Issue Information

Dear Colleagues,

For the worldwide scientific and technological community, semiconducting organic and hybrid materials and their use in different electronic devices have been the focus of a great deal of attention in recent years. Modifying the molecular structure of organic and hybrid materials allows us to manipulate their optoelectronic properties with endless versatility, thus improving the existing related technologies. For instance, organic light-emitting diodes (OLED) (for full-color displays already in the market and solid-state lighting), photovoltaic cells (OSCs, DSSCs and PSCs) and different sensors are being developed for the commercial market, while other technologies are emerging and growing rapidly, e.g. bioelectronics and nanoelectronics. Recent progress in the synthesis of new materials, device architectures and postreatment processs have led to excellent performance for the electronic devices: power conversion efficiencies above 18% for OSCs, around 15% for DSSC and over 25% for PSCs. Substantial progress has been achieved not only in designing novel materials, but also in supramolecular control, molecular packing and film morphology as efficient tools of improving device performance. Bioelectronics is an emerging field where the knowledge accumulated in organic electronics is applied to biological systems such as implantable electronic devices, artificial muscles, electronic devices and circuits that mimic some of the computational features of the brain.

This Special Issue in Energies, “Advances in Organic and Hybrid Opto-Electronics” will focus on an interdisciplinary approach where chemistry, physics, material sciences, optics and engineering disciplines are combined to address the fundamental aspects of organic and hybrid opto-electronic materials and their integration in electronic devices. You are cordially invited to submit contributions to this Special Issue in Energies.

The topics of interest for publication include but are not limited to:

New conjugated building blocks and new synthetic approaches to organic and hybrid semiconductors;
Synthesis of new π-functional organic materials: from small molecules to polymers;
Supramolecular control in organic and hybrid semiconductors;
Novel photo-physical and electrical phenomena of organic and hybrid devices;
New trends in electroluminescent devices (WOLED, SMOLED, TADF, etc.);
Progress in organic and hybrid solar cells (OSCs, DSSC and PSCs, new concept devices);
Organic electronics for biological applications (sensing, biointegration, electronic skin, etc.);
Industrial processing of organic and hybrid electronic devices (printed & flexible electronics);
Theoretical calculations in organic and hybrid electronics;
Role of surfaces and interfaces in organic and hybrid devices;
Nanoelectronics.

Dr. José-Luis Maldonado
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. Energies 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 2600 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 and hybrid semiconductors
Organic and hybrid electronic devices
Organic solar cells (OSCs) and Dye Sensitized Solar Cells (DSSC)
Perovskite solar cells (PSCs)
Organic and hybrid electro-luminescence devices (OLEDs)
Organic and hybrid electronics for biological applications
Printed and flexible electronics
Theoretical calculations
Surfaces and interfaces
Nanoelectronics
Bioelectronics

Published Papers (2 papers)

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Research

21 pages, 5659 KiB

Open AccessArticle

Synthesis of Donor–Acceptor Copolymers Derived from Diketopyrrolopyrrole and Fluorene via Eco-Friendly Direct Arylation: Nonlinear Optical Properties, Transient Absorption Spectroscopy, and Theoretical Modeling

by Jonatan Rodríguez-Rea, Marisol Güizado-Rodríguez, José-Luis Maldonado, Gabriel Ramos-Ortiz, José Ulises Reveles, Carlos Silva, Victor Barba, Esmeralda Monserrat Saucedo-Salazar and María Teresa Rodríguez Hernández

Energies 2022, 15(11), 3855; https://doi.org/10.3390/en15113855 - 24 May 2022

Cited by 2 | Viewed by 1848

Abstract

A series of PFDPP copolymers based on fluorene (F) and diketopyrrolopyrrole (DPP) monomers were synthesized via direct arylation polycondensation using Fagnou conditions which involved palladium acetate as catalyst (a gradual catalyst addition of three different percentages were used), potassium carbonate as the base, and neodecanoic acid in N, N-dimethylacetamide. This synthesis provides a low cost compared with traditional methods of transition-metal-catalyzed polymerization. Among the different amounts of catalyst used in the present work, 12% was optimal because it gave the highest reaction yield (81.5%) and one of the highest molecular weights (Mn = 13.8 KDa). Copolymers’ chemical structures, molecular weight distributions, and optical and thermal properties were analyzed. The linear optical properties of PFDPP copolymers resulted very similarly independently to the catalyst amounts used in the synthesis of the PFDPP copolymers: two absorptions bands distinctive of donor–acceptor copolymers, Stokes shifts of 41 nm, a good quantum yield of fluorescence around 47%, and an optical bandgap of 1.7 eV were determined. Electronic nonlinearities were observed in these copolymers with a relatively high two-photon absorption cross-section of 621 GM at 950 nm. The dynamics of excited states and aggregation effects were studied in solutions, nanoparticles, and films of PFDPP. Theoretical calculations modeled the ground-state structures of the (PFDPP)_n copolymers with n = 1 to 4 units, determining the charge distribution by the electrostatic potential and modeling the absorption spectra determining the orbital transitions responsible for the experimentally observed leading bands. Experimental and theoretical structure–properties analysis of these donor–acceptor copolymers allowed finding their best synthesis conditions to use them in optoelectronic applications. Full article

(This article belongs to the Special Issue Advances in Organic and Hybrid Opto-Electronics)

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11 pages, 8558 KiB

Open AccessArticle

Effect of Light Irradiation on the Diffusion Rate of the Charge Carrier Hopping Mechanism in P3HT–ZnO Nanoparticles Studied by μ⁺SR

by Eka Pratikna, Lusi Safriani, Nowo Riveli, Budi Adiperdana, Suci Winarsih, Annisa Aprilia, Dita Puspita Sari, Isao Watanabe and Risdiana Risdiana

Energies 2021, 14(20), 6730; https://doi.org/10.3390/en14206730 - 16 Oct 2021

Viewed by 1561

Abstract

Blended regio-regular P3HT–ZnO nanoparticles are a hybrid material developed as an active layer for hybrid solar cells. The study of the hopping mechanisms and diffusion rates of regio-regular P3HT–ZnO nanoparticles is significant for obtaining intrinsic charge transport properties that provide helpful information for preparing high-performance solar cells. The temperature dependences of the parallel and perpendicular diffusion rates in regio-regular P3HT–ZnO nanoparticles determined from muon spin relaxation measurements were investigated by applying various longitudinal fields. We investigated the effect of light irradiation on the diffusion rates in regio-regular P3HT–ZnO nanoparticles. We found that with increasing temperature, the parallel diffusion rate decreased, while the perpendicular diffusion rate increased. The ratio of the parallel to perpendicular diffusion rate

(D_{‖} / D_{⊥})

can be used to indicate the dominant charge carrier hopping mechanism. Without light irradiation, perpendicular diffusion dominates the charge carrier hopping, starting at 25 K, with a ratio of

1.70 \times 10^{4}

, whereas with light irradiation, the perpendicular diffusion of the charge carrier starts to dominate at the temperature of 10 K, with a ratio of

2.40 \times 10^{4}

. It is indicated that the additional energy from light irradiation affects the diffusion, especially the charge diffusion in the perpendicular direction. Full article

(This article belongs to the Special Issue Advances in Organic and Hybrid Opto-Electronics)

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