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Polymeric Materials for Solar Cell Applications

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: 30 April 2026 | Viewed by 863

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Guest Editor
Department of Chemistry, Chung Yuan Christian University, Taoyuan 320, Taiwan
Interests: organometallic chemistry and its application in potential materials; dye-sensitized solar cells; perovskite solar cells; optoelectronic sensors
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Special Issue Information

Dear Colleagues,

In the pursuit of next-generation photovoltaic technologies, polymeric materials have been established as one of the most promising alternatives to traditional inorganic solar cells. The distinct advantages offered by these materials—including their potential for low-cost manufacturing, solution processability, and mechanical flexibility—have captured the interest of many researchers and have paved the way for novel applications in flexible and portable electronics.

This Special Issue, “Polymeric Materials for Solar Cell Applications,” aims to present the latest advancements and breakthroughs in this dynamic field. We invite contributions covering the entire spectrum of this research, from the molecular design and synthesis of novel conjugated polymers and non-fullerene acceptors to the optimization of active layer morphology and interfacial engineering. We are particularly interested in studies that address the critical challenges of enhancing power conversion efficiency (PCE), improving long-term device stability, and developing scalable fabrication techniques for commercial viability. Topics may include, but are not limited to, novel donor and acceptor materials, charge transport mechanisms, device physics, degradation studies, and the integration of polymers in emerging photovoltaic architectures like perovskite and tandem solar cells. By bringing together cutting-edge research, this issue will provide a comprehensive overview of the current state and future directions of polymer-based solar energy conversion.

Dr. Yung-Sheng Yen
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. Polymers 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 2700 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

  • polymer solar cells
  • organic photovoltaics (OPV)
  • conjugated polymers
  • non-fullerene acceptors (NFAs)
  • active layer morphology
  • charge transport
  • device stability
  • flexible solar cells
  • solution processing
  • interfacial engineering

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Published Papers (2 papers)

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Research

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19 pages, 9557 KB  
Article
The Effect of Thermal Annealing on Optical Properties and Surface Morphology of a Polymer: Fullerene- and Non-Fullerene-Blend Films Used in Organic Solar Cells
by Bożena Jarząbek, Muhammad Raheel Khan, Barbara Hajduk, Andrzej Marcinkowski, Paweł Chaber, Adrian Cernescu and Yasin C. Durmaz
Polymers 2026, 18(2), 280; https://doi.org/10.3390/polym18020280 - 20 Jan 2026
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Abstract
The optical properties, electronic structure and morphology of thin films of the polymer donor PTB7-Th blended with either the fullerene acceptor PC70BM or the non-fullerene acceptor ZY-4Cl were systematically investigated to evaluate their annealing-induced evolution. Thin films were characterized using UV–Vis–NIR absorption spectroscopy, [...] Read more.
The optical properties, electronic structure and morphology of thin films of the polymer donor PTB7-Th blended with either the fullerene acceptor PC70BM or the non-fullerene acceptor ZY-4Cl were systematically investigated to evaluate their annealing-induced evolution. Thin films were characterized using UV–Vis–NIR absorption spectroscopy, spectroscopic ellipsometry, ATR-FTIR spectroscopy, atomic force microscopy (AFM), and nano-IR analysis. In situ stepwise thermal annealing revealed distinct changes in absorption edge parameters, indicating thermally induced modifications in the electronic structure of the blend films. Ellipsometric analysis showed that elevated temperatures significantly affect the refractive index and extinction coefficient spectra. AFM measurements demonstrated markedly different surface morphology evolution for the two blend systems, with pronounced needle-shaped crystallites formation observed in PTB7-Th:ZY-4Cl films after annealing at 100 °C. Nano-IR characterization identified these crystallites as predominantly PTB7-Th, indicating phase separation driven by thermal treatment. The combined optical and structural results reveal distinct annealing-induced changes in the blend. Finally, BHJ solar cells, based on PTB7-Th:PC70BM and PTB7-Th:ZY-4Cl active layers, were fabricated, and their photovoltaic response was demonstrated. Full article
(This article belongs to the Special Issue Polymeric Materials for Solar Cell Applications)
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Review

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34 pages, 3224 KB  
Review
Polymer–Ceramic Hybrid Composites for Lightweight Solar Thermal Collector Absorbers: Thermal Transport, Optical Selectivity, and Durability
by Sachin Kumar Sharma, Reshab Pradhan, Lokesh Kumar Sharma, Yogesh Sharma, Mohit Sharma, Yatendra Pal, Drago Bračun and Damjan Klobčar
Polymers 2026, 18(6), 678; https://doi.org/10.3390/polym18060678 - 11 Mar 2026
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Abstract
Polymer–ceramic hybrid composites are emerging as attractive candidates for lightweight, corrosion-resistant absorber components in solar thermal collectors; however, their adoption is constrained by the intrinsically low thermal conductivity of polymers, processing-induced anisotropic heat transport, interfacial thermal resistance at tube/laminate joints, and durability challenges [...] Read more.
Polymer–ceramic hybrid composites are emerging as attractive candidates for lightweight, corrosion-resistant absorber components in solar thermal collectors; however, their adoption is constrained by the intrinsically low thermal conductivity of polymers, processing-induced anisotropic heat transport, interfacial thermal resistance at tube/laminate joints, and durability challenges under outdoor exposure. This review provides a collector-centered synthesis of polymer–ceramic hybrid materials, emphasizing the translation of composite properties into collector-level outcomes rather than conductivity enhancement alone. A structure–property–performance mapping approach is presented to connect directional thermal conductivity ((k_in-plane), (k_perp)), thermal diffusivity, heat capacity, coefficient of thermal expansion, and service temperature with collector performance parameters such as heat removal effectiveness, overall heat losses, and stagnation behavior. Ceramic fillers (e.g., boron nitride, aluminum nitride, silicon carbide, alumina) are examined for stable conduction-network formation, coating compatibility, and long-term reliability, while carbon fillers (graphite, graphene nanoplatelets, carbon nanotubes) are evaluated for combined heat spreading and solar absorption benefits, with attention to emissivity penalties. Hybrid ceramic–carbon architectures and multilayer absorber designs are identified as the most promising routes to balance thermal transport, optical selectivity (high solar absorptance and low thermal emittance), manufacturability, and durability under UV, humidity, and thermal cycling. Full article
(This article belongs to the Special Issue Polymeric Materials for Solar Cell Applications)
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