Synthesis and Characterization of Novel Nonsymmetrical Phthalocyanines as Sensitizers for Photovoltaic Devices PDF Download
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Author: Giuseppina Giordano
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
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Author: Giuseppina Giordano
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
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Author: Yusuf Yilmaz
Publisher: BoD – Books on Demand
ISBN: 9535132555
Category : Science
Languages : en
Pages : 255
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Book Description
Since their initial accidental synthesis and characterization in Scotland in the late 1920s, there has been a strong research focus on the use of phthalocyanines (Pcs) as dyes and pigments. In recent years, active research fields have included their use in electrophotography, photovoltaic and solar cells, molecular electronics, Langmuir-Blodgett films, photosensitizers, electrochromic display devices, gas sensors, liquid crystals, low-dimensional conductors, and optical disks. Phthalocyanines possess interesting biological, electronic, optical, catalytic, and structural properties. The main disadvantage is their insolubility in common solvents due to strong intermolecular - interactions. The solubility of phthalocyanines can be increased by various methods such as the formation of anionic and cationic species and both axial and peripheral substitution. Substitution at the nonperipheral and peripheral positions of the benzo moieties usually enhances their solubility in organic solvents. The most important advantage of phthalocyanines compared to porphyrins is that their Q bands lie at longer wavelengths and are considerably more intense. In this book, you will find synthesis and some applications of various phthalocyanine derivatives.
Author: Jiang Yang
Publisher:
ISBN:
Category :
Languages : en
Pages : 127
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Author: 俞利鋼
Publisher:
ISBN:
Category : Photochemotherapy
Languages : en
Pages : 189
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Author: Robert Alan Hunter
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Trevor Grant
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Organic photovoltaic (OPV) devices utilizing organic (carbon-based) semiconductors have maintained research interest due to their potential for inexpensive, non-toxic, flexible, and lightweight solar modules. Numerous organic polymers and small molecules have been investigated for OPV applications, however a focus on maximizing the power conversion efficiency (PCE) of lab-scale devices has generated many novel active materials that are too complex to be realistically synthesized on a commercial scale. It has become apparent that developing low-cost, scalable, and stable active materials is crucial for the commercialization of OPV devices. Metal phthalocyanines (MPcs) are a well-known family of molecules with established scale up chemistry from their use as colorants and have demonstrated strong performance as low-cost semiconductors in organic electronic devices. However, their potential in solution-processed OPV devices has not been fully realized. In this thesis, a series of materials based on silicon phthalocyanine (SiPc) and tin phthalocyanine (SnPc) were synthesized and characterized. Novel molecular designs and OPV device architectures were investigated to further establish the use MPcs as low-cost active materials and to probe new applications. Specifically, the chemical and physical differences of structurally analogous soluble SiPc and SnPc derivatives were examined for the first time. The ability of a SiPc derivative to act as a thermal crosslinker to stabilize active layer morphology while simultaneously contributing to photocurrent generation was also proven. SiPc derivatives were then studied as electron acceptors paired with P3HT and PBDB-T donor polymers, achieving a PCE up to 4.3 %. The results herein establish new potential roles for group 14 MPcs in OPV devices while also demonstrating their synthetic simplicity and versatility. This work also serves as a basis for the wealth of chemical functionalization which remains available for continued optimization of these materials.
Author: Ingrid Panduleni Shikangala
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 116
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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 840
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Author: Sabu Thomas
Publisher: Elsevier
ISBN: 0128133384
Category : Technology & Engineering
Languages : en
Pages : 761
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Book Description
Nanomaterials for Solar Cell Applications provides a review of recent developments in the field of nanomaterials based solar cells. It begins with a discussion of the fundamentals of nanomaterials for solar calls, including a discussion of lifecycle assessments and characterization techniques. Next, it reviews various types of solar cells, i.e., Thin film, Metal-oxide, Nanowire, Nanorod and Nanoporous materials, and more. Other topics covered include a review of quantum dot sensitized and perovskite and polymer nanocomposites-based solar cells. This book is an ideal resource for those working in this evolving field of nanomaterials and renewable energy. - Provides a well-organized approach to the use of nanomaterials for solar cell applications - Discusses the synthesis, characterization and applications of traditional and new material - Includes coverage of emerging nanomaterials, such as graphene, graphene-derivatives and perovskites
Author: José Pérez Sestelo
Publisher: MDPI
ISBN: 3039435671
Category : Science
Languages : en
Pages : 234
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Book Description
In this Special Issue, recent advances in cross-coupling reactions are presented in the form of original research articles, reviews, and short communications. These contributions cover different topics in this area, including novel coupling reactions, reaction conditions, synthetic alternatives, metal ligands, and applications for new pharmaceutical compounds and organic materials. In particular, the reviews deal with methodologies such as the synthesis of diarylketones through palladium catalysis and the most relevant examples of Suzuki–Miyaura and Buchwald–Hartwig coupling reactions in the synthesis of bioactive compounds. The synthetic utility of cross-coupling reactions for the synthesis of medium-size rings and the utility of Stille and Suzuki coupling reactions for the synthesis of new molecular machines based on sterically hindered anthracenyl trypticenyl units are also summarized. The original research articles present the synthesis of 2-alkynylpyrrols by inverse Sonogashira coupling and the synthesis of indoles under oxidative dearomative cross-dehydrogenative conditions. The efficient combination of iridium-catalyzed C–H borylation of aryl halides with the Sonogashira coupling and a sequential iridium-catalyzed borylation of NH-free pyrroles followed by a Suzuki–Miyaura reaction are included. The synthesis of aryl propionic acids, a common structural motif in medicinal chemistry, and the synthesis of new organic dyes are also covered.
