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Solar Energy Technology in Sustainable Development

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Energy Sustainability".

Deadline for manuscript submissions: 20 July 2026 | Viewed by 618

Special Issue Editors


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Guest Editor
Department of Physics-CEFITEC, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
Interests: solar concentration; optics; photonics; solar-pumped lasers; sustainable technologies
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Physics-CEFITEC, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
Interests: solid-state lasers; solar power concentration; optics and lasers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

As global energy demands become critical, as well as the environmental consequences of fossil-fuel-based energy consumption, the research for solar energy technology and clean energy solutions has grown towards innovation and versatility, enabling environmental and economic benefits in many technological segments, such as green hydrogen production and renewable energy cycles.  

Solar energy technology is widely investigated for usage in several industrial and scientific areas, such as material processing, the medical industry, sustainable energy production, communications, scientific research, and space-borne applications. Especially due to the intermittent nature of renewable energy sources, the integration of smart grids and efficient energy storage technologies becomes increasingly important. Solar energy, combined with innovations in photonics technology, has also significantly improved the efficiency of solar energy systems, not only for optimizing solar power collection and generation but also playing a pivotal role in energy storage and grid management, propelling the future development of these sustainable systems.

The main current and future challenges for solar energy and green technologies are to increase the efficiency, versatility on potential applications, and scalability compared with other classical, fossil-fuel-based technologies, as a more robust and available implementation, suitable for different fields of low-carbon industry, technology, and poligeneration.

This Special Issue aims to collect original research articles, reviews, and case studies on solar energy research and green technologies, which could promote novel sustainable energy systems and their potential innovative applications. Research areas may include (but are not limited to) the following:

  • Novel energy storage systems and their integration and role in balancing supply and demand, improving grid stability.
  • Innovations in smart grids and microgrids involving solar energy to create flexible, reliable and efficient sustainable energy infrastructures.
  • Advancements in multi-beam solar-pumped lasers using new materials to maximize the collection efficiency and brightness.
  • Possibilities of integrated operation of solar collectors, sustainable energy generation, and how energy infrastructure should evolve as the grid becomes more decarbonised and decentralized.
  • Potential applications of sustainable energy in low-carbon industry and poligeneration.
  • Prospects of solar-pumped lasers for green hydrogen production.

We look forward for receiving your contributions.

Dr. Bruno D. Tibúrcio
Dr. Dawei Liang
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. Sustainability 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 2400 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 energy
  • energy storage
  • smart grids
  • solar concentration
  • solar-pumped laser
  • hydrogen production

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Published Papers (1 paper)

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Research

17 pages, 3166 KB  
Article
Multirod Side-Pumped Ce:Nd:YAG Architectures for Sustainable Solar Laser Power Generation
by Cláudia R. Vistas, Dawei Liang, Bruno D. Tibúrcio, Hugo Costa and Joana Almeida
Sustainability 2026, 18(6), 2972; https://doi.org/10.3390/su18062972 - 18 Mar 2026
Viewed by 345
Abstract
A detailed numerical optimization of side-pumped cerium- and neodymium-codoped yttrium aluminum garnet (Ce:Nd:YAG) solar laser architectures was performed using Zemax® and LASCADTM, aiming for both high-power multimode and TEM00-mode performances. Multiple rod configurations and laser resonator geometries were [...] Read more.
A detailed numerical optimization of side-pumped cerium- and neodymium-codoped yttrium aluminum garnet (Ce:Nd:YAG) solar laser architectures was performed using Zemax® and LASCADTM, aiming for both high-power multimode and TEM00-mode performances. Multiple rod configurations and laser resonator geometries were evaluated to maximize absorbed pump power, improve mode overlap, and ensure thermal stability. For multimode operation, the optimal design was a four-rod cross side-pumped configuration employing 4.0 mm diameter, 25 mm length rods, which numerically delivered a solar laser output power of 134 W (resulting in a collection efficiency of 49.1 W/m2 and solar-to-laser conversion efficiency of 4.91%), representing a 1.50-times improvement over the best previously reported value of 89.29 W. For TEM00-mode generation, the best performance was obtained with a three-rod horizontal side-pumped configuration using 2.5 mm diameter, 34 mm length rods, achieving a collection efficiency of 21.1 W/m2 and solar-to-laser conversion efficiency of 2.11%, surpassing the record 16.49 W/m2 reported in earlier literature. Thermal analyses revealed low peak temperatures, reduced thermally induced stress, and minimized refractive-index gradients in both architectures, confirming that multirod side pumping significantly improves the thermal environment and enables stable operation at high absorbed pump powers. These results demonstrate that carefully engineered multirod geometries can simultaneously enhance collection efficiency, beam quality, and thermal robustness, highlighting multirod side-pumped solar lasers as a promising pathway for further power scaling and next-generation high-performance solar laser systems. Full article
(This article belongs to the Special Issue Solar Energy Technology in Sustainable Development)
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