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Physchem
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Photophysics and Photochemistry in Materials for Advanced Technologies
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Photophysics and Photochemistry in Materials for Advanced Technologies

A special issue of Physchem (ISSN 2673-7167). This special issue belongs to the section "Photophysics, Photochemistry and Photobiology".

Deadline for manuscript submissions: 31 May 2026 | Viewed by 2127

Special Issue Editors

Prof. Dr. Eralci Moreira Therézio

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Guest Editor
Institute of Physics, Federal University of Mato Grosso (UFMT), Cuiabá 78060-900, Brazil
Interests: photoluminescence; poly(3-alkylthiophene); emission ellipsometry; photochemistry and photophysics; organic solar cells; perovskite solar cells
Special Issues, Collections and Topics in MDPI journals
Dr. Paulo Ernesto Marchezi

E-Mail Website
Guest Editor
Institute of Chemistry, University of Campinas (UNICAMP), Campinas 13083-970, Brazil
Interests: perovskite solar cells; thin-film deposition; self-assembled monolayers; photophysics; in-situ spectroscopy

Special Issue Information

Dear Colleagues,

Recent progress in the development of functional materials has provided new perspectives in photonic and optoelectronic technologies. The understanding of photophysical and photochemical phenomena is crucial to optimizing the performance of materials used in devices such as solar cells, sensors, light-emitting diodes, lasers, and photocatalysts. This Special Issue aims to bring together original research and review articles focusing on the interplay between light and matter at the molecular and nanoscale levels. Topics include excited-state dynamics, charge transfer mechanisms, energy migration, photoinduced structural transitions, and light–matter interaction in emerging materials such as perovskites, conjugated polymers, carbon-based systems, hybrid organic–inorganic structures, and 2D materials. The issue also welcomes contributions on experimental and theoretical approaches addressing spectroscopic techniques, photodegradation, and the design of photofunctional materials for advanced technologies.

Prof. Dr. Eralci Moreira Therézio
Dr. Paulo Ernesto Marchezi
Guest Editors

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 250 words) can be sent to the Editorial Office for assessment.

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. Physchem is an international peer-reviewed open access quarterly 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 1200 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

  • photophysics
  • photochemistry
  • excited states
  • light–matter interaction
  • perovskites
  • conjugated polymers
  • nanostructured materials
  • spectroscopy
  • photocatalysis
  • energy transfer

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Published Papers (3 papers)

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13 pages, 1849 KB  
Article
Emission Ellipsometry and Photophysical Pathways in Electropolymerized P3DDT Thin Films
by Everton Crestani Rambo, Ana Clarissa Kolbow, Sankler Soares de Sá, Romildo Jerônimo Ramos, Alexandre Marletta and Eralci Moreira Therézio
Physchem 2026, 6(1), 16; https://doi.org/10.3390/physchem6010016 - 4 Mar 2026
Viewed by 414
Abstract
In this work, poly(3-dodecylthiophene) (P3DDT) thin films were electrochemically synthesized onto fluorine-doped tin oxide (FTO) substrates via cyclic voltammetry using tetraethylammonium tetrafluoroborate (Et4NBF4) as the supporting electrolyte. Optical analyses were performed using ultraviolet–visible absorption spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), [...] Read more.
In this work, poly(3-dodecylthiophene) (P3DDT) thin films were electrochemically synthesized onto fluorine-doped tin oxide (FTO) substrates via cyclic voltammetry using tetraethylammonium tetrafluoroborate (Et4NBF4) as the supporting electrolyte. Optical analyses were performed using ultraviolet–visible absorption spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), emission ellipsometry (EE) and Raman spectroscopy. The results revealed the formation of distinct structures during the electropolymerization process, which significantly affected the optical behavior observed in the UV–Vis and PL spectra. Furthermore, the EE measurements provided insights into the impact of these structures on the polarization states of emitted and transmitted light on energy and charge transfer mechanisms and on the photophysical behavior of P3DDT. Variations in the degree of polarization (P), anisotropy factor (r), and asymmetry factor (g) were analyzed as a function of the emission wavelength. The results confirm the potential of P3DDT as an active layer in electroluminescent devices, as the emissive material used in the active layer consisted exclusively of this polymer. Full article
(This article belongs to the Special Issue Photophysics and Photochemistry in Materials for Advanced Technologies)
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15 pages, 2257 KB  
Article
Enhanced Circularly Polarized Luminescence and Thermal Stability of Eu(D-facam)3 in Imidazolium-Based Ionic Liquid EMImOAc
by Arata Suzuki, Ziying Li, Norihisa Kobayashi and Kazuki Nakamura
Physchem 2026, 6(1), 13; https://doi.org/10.3390/physchem6010013 - 25 Feb 2026
Viewed by 412
Abstract
The optical and thermal behaviors of a chiral europium(III) β-diketonate complex, Eu(D-facam)3 (facam: 3-(trifluoromethylhydroxymethylene)-(+)-camphorate), were examined in the presence of imidazolium-based ionic liquid 1-ethyl-3-methylimidazolium acetate (EMImOAc). The addition of EMImOAc to Eu(D-facam)3 butanol solutions enhanced their luminescence [...] Read more.
The optical and thermal behaviors of a chiral europium(III) β-diketonate complex, Eu(D-facam)3 (facam: 3-(trifluoromethylhydroxymethylene)-(+)-camphorate), were examined in the presence of imidazolium-based ionic liquid 1-ethyl-3-methylimidazolium acetate (EMImOAc). The addition of EMImOAc to Eu(D-facam)3 butanol solutions enhanced their luminescence intensity by up to 74-fold and induced clear circularly polarized luminescence (gCPL = −0.28 for the 5D0 → 7F1 transition). When Eu(D-facam)3 was dissolved directly in EMImOAc, the Eu(III) complex also exhibited distinct circularly polarized luminescence (gCPL = −0.22). In addition, compared with the thermal stability of luminescence in 1-butanol, the ionic liquid solution exhibited superior thermal robustness, retaining approximately 30% of its room-temperature emission intensity even at 100 °C. Arrhenius analysis of the solutions was performed using their emission intensity and lifetime to evaluate the emission stability at higher-temperature regions near 70–100 °C. In EMImOAc, the thermal acceleration of the nonradiative decay of the ligands was suppressed; thus, the energy transfer from the ligand to the Eu(III) ion was stabilized even at higher temperatures. These results highlight the role of ionic liquids as effective media toward achieving thermally robust and highly emissive chiral Eu(III) systems. Full article
(This article belongs to the Special Issue Photophysics and Photochemistry in Materials for Advanced Technologies)
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18 pages, 1453 KB  
Article
Refined Langmuir–Hinshelwood Kinetics for Heterogeneous Photocatalytic Systems: Analytical Closed-Form Solution, Enhanced Approximations and Experimental Validation
by Juan Francisco Ramos-Justicia, Ana Urbieta and Paloma Fernández
Physchem 2026, 6(1), 5; https://doi.org/10.3390/physchem6010005 - 14 Jan 2026
Cited by 1 | Viewed by 777
Abstract
This study takes a further step forward in the analytical treatment of Langmuir–Hinshelwood (LH) kinetics for heterogeneous catalysis by deriving its closed-form solution. Unlike previous studies, we present a general solution that does not impose severe restrictions on the experimental conditions. This solution [...] Read more.
This study takes a further step forward in the analytical treatment of Langmuir–Hinshelwood (LH) kinetics for heterogeneous catalysis by deriving its closed-form solution. Unlike previous studies, we present a general solution that does not impose severe restrictions on the experimental conditions. This solution not only recovers the typical first- and zeroth-order regimes but also enables the simultaneous determination of the reaction rate constant and absorption–desorption equilibrium constant, unlike the traditional approaches to this equation, which needed additional isotherm experiments. The final solution requires a fine mathematical treatment for its numerical implementation, but enhanced approximations of the closed-form solution overcome this problem without losing the main advantage of calculating both constants at the same time. A parameter called “critical time” has been introduced, whose calculation allows us to distinguish quantitatively between kinetic regimes. Finally, the validation of these approximations has been carried out with experiments on zinc oxide and anatase (TiO2) under different conditions. Anatase experiments undoubtedly show a first-order tendency, regardless the quantity of powder. On the other hand, the degradation regime of the ZnO case cannot be easily ascribed to the zeroth or first order by simple inspection, but the model can mathematically rule out the zeroth order and confirm that it undergoes first-order degradation. Full article
(This article belongs to the Special Issue Photophysics and Photochemistry in Materials for Advanced Technologies)
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