Download or read book Synthesis and Characterization of Organic Ligands and the Corresponding Ru Dyes for Dye Sensitized Solar Cells written by Baharak Bakhshaei and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organometallics and Related Molecules for Energy Conversion written by Wai-Yeung Wong and published by Springer. This book was released on 2015-03-30 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a critical perspective of the applications of organometallic compounds (including those with metal or metalloid elements) and other related metal complexes as versatile functional materials in the transformation of light into electricity (solar energy conversion) and electricity into light (light generation in light emitting diode), in the reduction of carbon dioxide to useful chemicals, as well as in the safe and efficient production and utilization of hydrogen, which serves as an energy storage medium (i.e. energy carrier). This book focuses on recent research developments in these emerging areas, with an emphasis on fundamental concepts and current applications of functional organometallic complexes and related metal-based molecules for energy research. With contributions from front-line researchers in the field from academia and industry, this timely book provides a valuable contribution to the scientific community in the field of energy science related to metal-based molecular materials. Wai-Yeung Wong, PhD, is Chair Professor and Head of the Department of Chemistry at Hong Kong Baptist University, Hong Kong, P. R. China.
Download or read book Metal Free Synthetic Organic Dyes written by Ghodsi Mohammadi Ziarani and published by Elsevier. This book was released on 2018-07-25 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal- Free Synthetic Organic Dyes is a comprehensive guide to the synthetic, organic dyes that are classified by their chemical structure. As synthetic dyes are playing an increasingly important role in modern life, with applications in both industry and scientific research, this book provides insights on the many research attempts that have been made to explore new photosensitizers in the development of dye sensitized solar cells (DSCs). These novel photosensitizers have incorporated, within their structure, different organic groups, such as coumarins, cyanines, hemicyanines, indolines, triphenylamines, bis(dimethylfluorenyl) aminophenyls, phenothiazines, tetrahydroquinolines, carbazoles, polyenes, fluorenes, and many others. This comprehensive resource contains color figures and schemes for each dye discussed, and is an invaluable resource for organic, inorganic and analytical chemists working in academia and industry. Features a discussion of the synthesis of the new, high-value synthetic dyes and pigments and their applications and performance Includes coverage of new photosensitizers and their role in the development of dye sensitized solar cells (DSCs) Covers synthesis of the functional dyes that are ideal for applications in the dye and pigment industry, textiles, color science, solar energy materials and solar cells, biomedical sensors, advanced materials, structure and synthesis of materials, and more
Download or read book Synthesis and Characterization of Transition Metal Based Dyes for the Application in Dye Sensitized Solar Cells written by and published by . This book was released on 2014 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Nanomaterials written by Tomas Torres and published by John Wiley & Sons. This book was released on 2013-10-14 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover a new generation of organic nanomaterials and their applications Recent developments in nanoscience and nanotechnology have given rise to a new generation of functional organic nanomaterials with controlled morphology and well-defined properties, which enable a broad range of useful applications. This book explores some of the most important of these organic nanomaterials, describing how they are synthesized and characterized. Moreover, the book explains how researchers have incorporated organic nanomaterials into devices for real-world applications. Featuring contributions from an international team of leading nanoscientists, Organic Nanomaterials is divided into five parts: Part One introduces the fundamentals of nanomaterials and self-assembled nanostructures Part Two examines carbon nanostructures—from fullerenes to carbon nanotubes to graphene—reporting on properties, theoretical studies, and applications Part Three investigates key aspects of some inorganic materials, self-assembled monolayers, organic field effect transistors, and molecular self-assembly at solid surfaces Part Four explores topics that involve both biological aspects and nanomaterials such as biofunctionalized surfaces Part Five offers detailed examples of how organic nanomaterials enhance sensors and molecular photovoltaics Most of the chapters end with a summary highlighting the key points. References at the end of each chapter guide readers to the growing body of original research reports and reviews in the field. Reflecting the interdisciplinary nature of organic nanomaterials, this book is recommended for researchers in chemistry, physics, materials science, polymer science, and chemical and materials engineering. All readers will learn the principles of synthesizing and characterizing new organic nanomaterials in order to support a broad range of exciting new applications.
Download or read book The Synthesis of Solar Cell Dyes written by Yasmeen Abdullah Hameed and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic Structure Measurements of Metal organic Solar Cell Dyes Using X ray Absorption Spectroscopy written by and published by . This book was released on 2014 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this thesis is twofold: to report the results of X-ray absorption studies of metal-organic dye molecules for dye-sensitized solar cells and to provide a basic training manual on X-ray absorption spectroscopy techniques and data analysis. The purpose of our research on solar cell dyes is to work toward an understanding of the factors influencing the electronic structure of the dye: the choice of the metal, its oxidation state, ligands, and cage structure. First we study the effect of replacing Ru in several common dye structures by Fe. First-principles calculations and X-ray absorption spectroscopy at the C 1s and N 1s edges are combined to investigate transition metal dyes in octahedral and square planar N cages. Octahedral molecules are found to have a downward shift in the N 1s-to-[pi]* transition energy and an upward shift in C 1s-to-[pi]* transition energy when Ru is replaced by Fe, explained by an extra transfer of negative charge from Fe to the N ligands compared to Ru. For the square planar molecules, the behavior is more complex because of the influence of axial ligands and oxidation state. Next the crystal field parameters for a series of phthalocyanine and porphyrins dyes are systematically determined using density functional calculations and atomic multiplet calculations with polarization-dependent X-ray absorption spectra. The polarization dependence of the spectra provides information on orbital symmetries which ensures the determination of the crystal field parameters is unique. A uniform downward scaling of the calculated crystal field parameters by 5-30% is found to be necessary to best fit the spectra. This work is a part of the ongoing effort to design and test new solar cell dyes. Replacing the rare metal Ru with abundant metals like Fe would be a significant advance for dye-sensitized solar cells. Understanding the effects of changing the metal centers in these dyes in terms of optical absorption, charge transfer, and electronic structure enables the systematic design of new dyes using less expensive materials.
Download or read book Synthesis Characterization and Photophysical Studies of RU II Bipyridyl dithiocarbamate Complexes as Sensitizers for Dye Sensitized Solar Cells written by Zintle Fudo and published by . This book was released on 2018 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterisation of Organic Dyes for Solid State Dye Sensitized Solar Cells written by Ute Cappel and published by . This book was released on 2011 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functional Dyes written by Sung-Hoon Kim and published by Elsevier. This book was released on 2006-03-08 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last 10 years organic dyes, traditionally used for coloring textiles and other materials, have become increasingly important in the hi-tech industries of electronics and optoelectronics. They can be used in optical data storage, new solar cells and biomedical sensors.Functional Dyes discusses the synthesis of these new, high-value dyes and pigments as well as their applications and performance. The chapters are arranged so that the reader logically advances from the fundamental concepts to more practical aspects of the technology in which they are used.In providing the reader with current information on functional dye chemistry, as well as important developments within the field, Functional Dyes is a valuable information source for dye and material chemists, researchers and graduates, who want a summary of the key advances in the field over the last 10 years and an authoritative view on future developments. * Provides a broad introduction to the science technology of the functional dye application* Reviews recent advances on synthesis and characteristics of the functional dyes and their applications* Is a valuable information source for dye and material chemists and researchers
Download or read book Photoelectrochemical Characterization of Dye sensitized Solar Cells Based on ZnO and Organic Dyes written by Melanie Rudolph and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Synthesis of New Organic Dyes for Highly Efficient Dye sensitized Solar Cells DSSCs written by Yong Hua and published by . This book was released on 2014 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrochemical and Spectroelectrochemical Studies of Dyes Used in Dye sensitized Solar Cells written by Alberto Fattori and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemical and spectroelectrochemical techniques were employed to investigate the redox characteristics of dyes for dye sensitized solar cells (DSCs) adsorbed at the surface of fluorine-doped tin oxide (FTO) and FTO TiO2 electrodes. In this work are studied Ru-based dyes such as cis-bis(isothiocyanato)-bis(2,2'-bipyridyl- 4,4'dicarboxylato)-ruthenium(II) (N719) and (cis-RuLL'(SCN)2 with L=4,4'- dicarboxylic acid-2,2'-bipyridine and L'=4,4'-dinonyl-2,2'-bipyridine) known as Z907, and indoline organic dyes coded as D102, D131, D149, and D205. The adsorption, diffusion and stability of adsorbed dyes were studied using cyclic voltammetry in acetonitrile and 0.1 M NBu4PF6. The adsorption technique at FTO electrodes was optimized in order to be reproducible so that electrochemical studies as a function of dye coverage were carried out. Langmuirian binding constants were approximately estimated for all dyes adsorbed at FTO electrodes. Rate constants for the chemical degradation of the oxidized dye were also obtained. Is shown that degradation of the dyes mainly occurs at the surface of FTO and only insignificant degradation is evident once the dyes are adsorbed on TiO2. The degradation of dye adsorbed on FTO is shown to affect charge transport from the nonporous TiO2 via electron hopping. Spectroelectrochemical studies of indoline dyes adsorbed on FTO/TiO2 electrodes revealed a red shift of absorption peaks after oxidation and the presence of a strong charge transfer band in the near IR that suggest delocalization of holes in the dye layer. This is consistent with observation that the diffusion coefficient for hole conduction in the adsorbed dye layer is several orders of magnitude higher for the organic dyes compared to the Ru-based dyes. DSCs fabricated using indoline dyes showed good performance. Incident photon-tocurrent conversion efficiency (IPCE) spectra and I-V characteristics are presented.
Download or read book Investigation of Ruthenium Complexes of Novel Heterocyclic Ligands for Application in Photovoltaic Cells written by Mohammad Nozari and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fossil fuels are a finite resource and will eventually run out. The use of fossil fuels contributes to global warming from air pollution created mainly by the greenhouse gas carbon dioxide, which encourages using other energy alternatives. Finding clean and renewable energy sources such as wind power, hydropower and photovoltaics is one of the top priorities in science. Solar energy is one of the main renewable sources being invested in, it is clean and abundant and can benefit the world. There are different types of photovoltaic cells, solar cells, such as silicon cells, thin-film cells, polymer cells, organic cell, perovskite cells, quantum dot and dye-sensitized solar cells (DSSCs) that have been widely investigated due to their high potential for solving the energy problem. DSSCs are investigated in this thesis. In this work, different classes of compounds were investigated, based on bzimpy, pyrazole, NTB in chapter 2 and dibenzo[b,j][1,10]phenanthrolines in chapter 3 which highlight the effect of having multiple groups on the dye molecule as well as the extended aromaticity, on the properties of ruthenium-based DSSCs. For bzimpy, pyrazole and NTB, first, novel ligands were designed, synthesized, and then N-alkylation method was utilized which works systematically unlike some previous methods in the literature, to insert different groups on the ligand. Dyes were synthesized using the ligands: mebzimpy, prbzimpy, npbzimpy and anbzimpy had power conversion efficiencies ([eta]) of 0.38%, 11.58%, 0.34% and 0.28% respectively. For pyrazole derivatives, Dyes were synthesized form quinolyldiphenylpyrazole and quinolyldi-t-butylpyrazole ligands had power conversion efficiencies ([eta]) of 2.14% and 0.81%, respectively. NTB-based dyes synthesized from Et3NTB, Pr3NTB and Np3NTB had power conversion efficiencies ([eta]) of 0.20%, 0.28% and 0.13% respectively. For dibenzo[b,j][1,10]phenanthrolines, a synthetic scheme was developed that improves previously used methods, creating the possibility of making a library of novel compounds to be used for future investigations. These ligands were then coordinated to ruthenium, and finally ruthenium complexes (dyes) were studied and evaluated for their application in DSSCs. Phenanthroline dyes synthesized form dsdhphen, dsphen, badhphen and baphen had power conversion efficiencies ([eta]) of 0.35%, 0.46%, 0.59% and 0.52% respectively. It was found that all these dyes display extended absorption of 622 to 628 nm in comparison to the reference dye (N719) which is 533 nm. Pyrazole-based dyes had the highest overall efficiency among investigated groups. However, increasing the absorption maxima to longer wavelengths does not necessarily increase the efficiency.
Download or read book Synthesis of Organic Dyes for Dye Sensitised Solar Cells written by Ciaran Lyons and published by . This book was released on 2013 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Synthesis of Organic Dyes for Solar Energy Conversion and Storage written by Kevin A. Click and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 3 exploits the unique highly hydrophobic and large light absorption properties of the BH4 dye to answer the stability and wettability issues faced in solar driven water splitting applications. The unprecedented stability of the BH4 dye on NiO allowed the first use of low pH electrolytes to be used in p-type water splitting DSPECs. The ability to use acidic electrolytes likewise allowed the use of an acidically soluble and active earth abundant [Mo3S4]4+ homogeneous catalyst for the first time. Chapter 4 further utilizes the aqueous stability of the BH series dyes for aqueous based DSSCs. Utilizing water as the electrolyte solvent makes the already cost effective tandem DSSCs even more economical and environmentally friendly. The BH2 dye was used to fabricate entirely aqueous p-type DSSCs using the iodide/triiodide redox for the first time. The BH2 dye displayed aqueous p-type DSSC photocurrents greater than most non-aqueous p-type DSSCs and were stable for up to 4 months with no sign of photocathode degradation. Furthermore, aqueous tandem DSSC were fabricated with a completely aqueous electrolyte with all earth abundant materials with no use of any precious metals. Chapter 5 introduces a new dye (KC2) designed specifically for aqueous based dye sensitized electrodes. From what was learned in Chapters 2 – 4, there exists a dilemma between aqueous dye stability and wettability in the form of hydrophobicity. A novel layered amphiphilic structure is proposed to balance both the aqueous stability and wettability of dye sensitized films. The new amphiphilic KC2 dye was synthesized and fully characterized. It was compared to its purely hydrophobic analog (BH2) in all aspects including electrochemical, photo-physical and device performance properties. The KC2 dye doubles the aqueous wettability of sensitized NiO films and displays excellent stability identical to that of the hydrophobic BH2 dye. Finally from what was discovered from the KC2 dye, a new amphiphilic structure is proposed for further exploration. Chapter 6 summarizes the common experimental procedures and details used throughout the dissertation. More specific procedures relevant to each chapter are discussed in each corresponding chapter introduction.
Download or read book Handbook of Biological Dyes and Stains written by R. W. Sabnis and published by John Wiley & Sons. This book was released on 2010-03-29 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: A COMPLETE, UP-TO-DATE RESOURCE OF INFORMATION ON MORE THAN 200 DYES AND STAINS Handbook of Biological Dyes and Stains is the most comprehensive volume available on the subject, covering all the available dyes and stains known to date in the literature for use in biology and medicine. Top dye expert Dr. Ram Sabnis organizes the compounds alphabetically by the most commonly used chemical name. He presents an easy-to-use reference complete with novel ideas for breakthrough research in medical, biological, chemical, and related fields. This is the first book to give the CAS registry number, chemical structure, Chemical Abstracts index name, all other chemical names, Merck Index number, chemical/dye class, molecular formula, molecular weight, physical form, solubility, melting point, boiling point, pH range, color change at pH, pKa, absorption, and emission maxima of dyes and stains, as well as to provide access to synthesis procedures (lab scale and industrial scale) of dyes and stains. This user-friendly handbook also features references on safety, toxicity, and adverse effects of dyes and stains on humans, animals, and the environment, including: acute/chronic toxicity aquatic toxicity carcinogenicity cytotoxicity ecotoxicity genotoxicity hepatotoxicity marine toxicity mutagenicity nephrotoxicity neurotoxicity oral toxicity phototoxicity phytotoxicity The use of biological dyes and stains has extremely high potential in today's business environment. This makes Handbook of Biological Dyes and Stains a convenient, must-have reference. Its staining, biological, and industrial applications make it a vital resource for industrial and academic researchers; the book also serves as a valuable desktop reference for medical professionals, biologists, chemists, chemical/optical engineers, physicists, materials scientists, intellectual property professionals, students, and professors.
