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Advances in Photovoltaic/Solar Collectors and Their Potential for an Industrial Decarbonization: 2nd Edition

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A2: Solar Energy and Photovoltaic Systems".

Deadline for manuscript submissions: 31 October 2026 | Viewed by 1305

Special Issue Editor


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Guest Editor
Physics Department, NOVA School of Science and Technology, CEFITEC, 2829-516 Caparica, Portugal
Interests: concentrated solar power; solar-pumped lasers; tracking error in solar collectors; PV cells; applied optics; laser technology

Special Issue Information

Dear Colleagues,

The development of renewable energy technology is now widely considered of paramount importance to moving towards sustainable energy generation and climate change mitigation. The low-energy density and seasonal variations, with geographical dependence, make the development of high-solar-energy concentration systems an important and challenging investigation. Advances in solar collectors and solar energy concentration enable not only a massive scaling in energy production but also can lead to industrial decarbonisation. The efficiency of solar collectors and other solar energy concentration systems is significantly affected by errors in their alignment with the Sun. Thus, the necessity and the importance of solar tracking systems become a critical key for the development and implementation of any photovoltaic system or solar collector.

This Special Issue is intended to collect original research works, reviews and case studies on innovative technology developments to maximize the collection efficiency of different energy generation systems. The topics of interest for publication include, but are not limited to, the following:

  • New progresses in solar collectors to maximize the collection efficiency of different energy generation systems;
  • Advancements in the solar collection and concentration efficiency;
  • PV technology/solar collectors and their potential applications for a low-carbon industry;
  • Improved solar tracking for energy-production systems;
  • Developments in solar cells for PV technology;
  • Solar-pumped lasers;
  • Solar energy collectors for hydrogen production;
  • Integrated operation of solar collectors, energy storage and potential industrial applications.

Dr. Bruno D. Tibúrcio
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 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. 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

  • solar collectors
  • industrial decarbonization
  • PV cells
  • solar tracking

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Published Papers (1 paper)

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Research

18 pages, 3566 KB  
Article
Solar-Pumped Ce:Nd:YAG Laser Amplifier Design
by Joana Almeida, Bruno D. Tibúrcio, Hugo Costa, Cláudia R. Vistas and Dawei Liang
Energies 2025, 18(18), 5009; https://doi.org/10.3390/en18185009 - 20 Sep 2025
Cited by 1 | Viewed by 912
Abstract
A solar-pumped Ce:Nd:YAG laser amplifier design is proposed to address the challenge of scaling output power in solar-pumped laser oscillators while maintaining high beam quality. The design employs a 1.33 m2 flat Fresnel lens with a 2 m focal length as a [...] Read more.
A solar-pumped Ce:Nd:YAG laser amplifier design is proposed to address the challenge of scaling output power in solar-pumped laser oscillators while maintaining high beam quality. The design employs a 1.33 m2 flat Fresnel lens with a 2 m focal length as a primary concentrator, which is combined with a secondary homogenizing concentrator, featuring 40 mm × 40 mm input aperture, 200 mm length, and 11.3 mm × 26 mm output aperture, to provide efficient coupling and uniform distribution of solar radiation onto a 2.9 mm thick Ce:Nd:YAG slab with 11.3 mm × 26 mm surface area and two beveled corners. This geometry enables multiple total internal reflections of a 1064 nm TEM00 mode seed laser beam inside the slab, ensuring efficient interaction with the active Ce3+ and Nd3+ ions in the gain medium. Performed numerical analysis shows that the present approach can deliver a uniform solar pump power density of 2.5 W/mm2 to the slab amplifier. This value is 2.05-times higher than the numerically calculated power density incident on the Nd:YAG slab of the previous solar-pumped amplifier that achieved the highest continuous-wave laser gain of 1.64. Furthermore, the optimized slab geometry with 0.44 width-to-height ratio allows the seed laser to undergo 32 internal reflections, extending its optical path length by a factor of 1.45 compared to the earlier design. These numerical achievements, combined with the Ce:Nd:YAG medium’s capacity to deliver nearly 1.57-times more laser power than Nd:YAG, reveal the potential of proposed design to yield a gain enhancement factor of 4.16, making the first solar-pumped Ce:Nd:YAG amplifier a promising solution toward energy-efficient, sustainable solutions for terrestrial and space applications. Full article
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