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Special Issue "Nanomaterials and Interfaces for Organic Photovoltaics"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: 31 August 2020.

Special Issue Editor

Prof. Dr. Bruno Pignataro
Website
Guest Editor
University of Palermo, Palermo, Italy
Interests: Biotechnologies for Medicinal Chemistry; Inorganic and Hybrid Nanomaterials and Surface Enhanced Properties; Nanotechnologies for Organic/Plastic Electronics

Special Issue Information

Dear Colleagues,

Organic solar cells (OSCs) are receiving more and more interest from the scientific community because of their flexibility, lightness, and low-cost. Power conversion efficiencies (PCE) over 17% have recently been obtained thanks to the development of new nanomaterials, interfaces, and cell-architectures. Flexible and semitransparent OSCs found very promising applications in wearable energy resources, building-integrated photovoltaics, multi-junction solar cells, flexible, portable and biocompatible devices, etc. This Special Issue will highlight recent advances in OSCs focusing on possible strategies to improve their power conversion efficiency, their stability, transparency, and production costs, as well as implementing their application landscape.

Prof. Bruno Pignataro
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 papers will be 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. Molecules 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 2000 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

  • Nanomaterials
  • interfaces
  • organic solar cells
  • plastic solar cells
  • donor
  • acceptor
  • dye
  • hybrid material
  • fullerene acceptor
  • non-fullerene acceptor
  • electron transport layer (ETL)
  • hole transport layer (HTL)
  • bulk heterojunction
  • planar heterojunction
  • charge generation
  • recombination
  • charge mobility
  • multiphonon transition
  • transparent and/or flexible electrode
  • morphology
  • in silico investigation
  • efficiency
  • aging
  • compatibilizer
  • three components solar cells
  • semitransparent organic solar cells
  • wearable energy sources
  • building-integrated photovoltaics
  • multi-junction solar cells
  • flexible
  • portable
  • biocompatible solar cells

Published Papers (2 papers)

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Research

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Open AccessArticle
Effects of Intra- and Interchain Interactions on Exciton Dynamics of PTB7 Revealed by Model Oligomers
Molecules 2020, 25(10), 2441; https://doi.org/10.3390/molecules25102441 - 23 May 2020
Abstract
Recent studies have shown that molecular aggregation structures in precursor solutions of organic photovoltaic (OPV) polymers have substantial influence on polymer film morphology, exciton and charge carrier transport dynamics, and hence, the resultant device performance. To distinguish photophysical impacts due to increasing π-conjugation [...] Read more.
Recent studies have shown that molecular aggregation structures in precursor solutions of organic photovoltaic (OPV) polymers have substantial influence on polymer film morphology, exciton and charge carrier transport dynamics, and hence, the resultant device performance. To distinguish photophysical impacts due to increasing π-conjugation from chain lengthening and π–π stacking from single/multi chain aggregation in solution and film, we used oligomers of a well-studied charge transfer polymer PTB7 with different lengths as models to reveal intrinsic photophysical properties of a conjugated segment in the absence of inter-segment aggregation. In comparison with previously studied photophysical properties in polymeric PTB7, we found that oligomer dynamics are dominated by a process of planarization of the conjugated backbone into a quinoidal structure that resembles the self-folded polymer and that, when its emission is isolated, this quinoidal excited state resembling the planar polymer chain exhibits substantial charge transfer character via solvent-dependent emission shifts. Furthermore, the oligomers distinctly lack the long-lived charge separated species characteristic of PTB7, suggesting that the progression from charge transfer character in isolated chains to exciton splitting in neat polymer solution is modulated by the interchain interactions enabled by self-folding. Full article
(This article belongs to the Special Issue Nanomaterials and Interfaces for Organic Photovoltaics)
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Review

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Open AccessReview
Tackling Performance Challenges in Organic Photovoltaics: An Overview about Compatibilizers
Molecules 2020, 25(9), 2200; https://doi.org/10.3390/molecules25092200 - 08 May 2020
Abstract
Organic Photovoltaics (OPVs) based on Bulk Heterojunction (BHJ) blends are a mature technology. Having started their intensive development two decades ago, their low cost, processability and flexibility rapidly funneled the interest of the scientific community, searching for new solutions to expand solar photovoltaics [...] Read more.
Organic Photovoltaics (OPVs) based on Bulk Heterojunction (BHJ) blends are a mature technology. Having started their intensive development two decades ago, their low cost, processability and flexibility rapidly funneled the interest of the scientific community, searching for new solutions to expand solar photovoltaics market and promote sustainable development. However, their robust implementation is hampered by some issues, concerning the choice of the donor/acceptor materials, the device thermal/photo-stability, and, last but not least, their morphology. Indeed, the morphological profile of BHJs has a strong impact over charge generation, collection, and recombination processes; control over nano/microstructural morphology would be desirable, aiming at finely tuning the device performance and overcoming those previously mentioned critical issues. The employ of compatibilizers has emerged as a promising, economically sustainable, and widely applicable approach for the donor/acceptor interface (D/A-I) optimization. Thus, improvements in the global performance of the devices can be achieved without making use of more complex architectures. Even though several materials have been deeply documented and reported as effective compatibilizing agents, scientific reports are quite fragmentary. Here we would like to offer a panoramic overview of the literature on compatibilizers, focusing on the progression documented in the last decade. Full article
(This article belongs to the Special Issue Nanomaterials and Interfaces for Organic Photovoltaics)
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