Download or read book Ultrafast Dyanmics i e Dynamics Associated with Transition Metal based Sensitizers for Titanium Dioxide Based Solar Cells written by Amanda Lea Smeigh and published by . This book was released on 2007 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Optimization of Titanium Dioxide TiO2 Thickness and Organic Dye Sensitizers to Improve Dye Sensitized Solar Cell DSSC Performance written by Syafinar Ramli and published by . This book was released on 2015 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this research are to fabricate the dye sensitized solar cell (DSSC) with anatase nanocrystalline Titanium Dioxide (TiO2) film at 5 and 10 um and sensitized with nature based dyes; to characterized DSSC based on open circuit voltage; VOC, short circuit current; ISC, fill factor; FF, solar cell efficiency; n, UV-Vis absorbance spectra (nm), absorption coefficient (o), photon energy (eV) and Fourier Transform Infrared Spectra (FTIR) of the dye and microstructure of TiO2 by Scan Electron Microscopy (SEM); to propose an ideal nature based dye sensitized solar cell (DSSC) based on optimum thickness and potential based dye sensitizer towards optimum photoelectrical performance.
Download or read book Ultrafast Dynamics of Excitons in Bulk and Monolayer Selenide Transition Metal Dichalcogenides written by Simon Raiber and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrafast Transient Absorption Spectroscopy of Valley Carrier Dynamics in Atomically Thin Transition Metal Dichalcogenides written by Cong Mai and published by . This book was released on 2018 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrafast Dynamics of Transition Metal Complexes written by George Farrow and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrafast Dynamics and Control in Layered Transition Metal Oxides written by Kelson James Kaj and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafast and time-resolved THz techniques have emerged as an important tool not only for measuring the equilibrium properties of quantum materials, but also for exhibiting control over their phases and degrees of freedom. This thesis focuses on the use of THz light to drive nonlinearities, probe strong coupling, and probe photoinduced phase transitions in layered transition metal oxides. After a brief introduction to the thesis in chapter 1, the physics behind the materials discussed in this thesis will be described in chapter two. Then an introduction to the experimental techniques used in this thesis will be given in chapter three. Chapter four consists of a project measuring the THz nonlinearities in a superconducting cuprate. Strong coupling in the THz range on the same superconducting cuprate is the subject of chapter five. Finally, experiments concerning the photoinduced insulator-to-metal transitions are discussed in chapter 6. This will be followed by a conclusion, summarizing the work of this thesis.
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 Structural Properties of Titanium Dioxide Films for Dye sensitized Solar Cells written by Tulsi Patel and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Characterization of Dye and Semiconductor Sensitized Solar Cells Based on Structurally Organized Titanium Dioxide written by Oleksandr Kuz'mič and published by . This book was released on 2014 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Engineering of Ruthenium based Sensitizers and Metal Free Organic Sensitizers with Panchromatic Chromophores for Highly Efficient Dye Sensitized Solar Cells written by Rui Su and published by . This book was released on 2019 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrafast Photophysical and Photochemical Dynamics of Polyhalogenated Alkanes Cycloalkanes and Transition Metal Complexes written by Darya S Budkina and published by . This book was released on 2019 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work aims at deeper understanding of chemical reaction dynamics, ultrafast photochemical and photophysical relaxation pathways, and energy redistribution and dissipation in the liquid phase on a femto-to-picosecond timescale. Breaking and making of chemical bonds, structural reorganization, and energy flow are all the essence of chemistry, and all occur on the time scale of molecular vibrations (tens of femtoseconds). Important insights about the structure of evolving molecules, relaxation phenomena, and ultrafast photochemical and photophysical population dynamics can be obtained using sub-50-fs time-resolved transient absorption spectroscopy. As a result, highly viable and/or unique information about the mechanism of relaxation dynamics and the nature of short-lived intermediates can be gained. Furthermore, ultrashort laser pulses with duration of 100 fs or shorter can help set up and detect coherent motion in vibronic excited and ground states. Coherence observed in product states provides the knowledge about electronic and nuclear motion along the relaxation path. This yields the information about the potential energy surfaces involved in the photochemical or photophysical process that occurs. The knowledge acquired from such experiments can be used as an entry point for control of femtochemical processes in solution. The technical aspect of this work focuses on developing and optimizing the ultrafast transient absorption setup for studying ultra-rapid photochemical relaxation dynamics in the molecules of interest, namely, geminal dibromocycloalkanes and halogen-containing transition metal complexes. Excitation pulses from deep-UV to near-IR were temporally compressed using prisms compressors to generate sub-40 fs laser pulses. Also, stable white-light continuum pulses used for probing were generated in the wide spectral range of 280 - 760 nm. This thesis is divided into two main parts. The first part provides information about ultrafast dynamics (10-fs time resolution after deconvolution) of geminal dibromocycloalkanes. The second part covers ultrafast radiationless relaxation dynamics of halogen-containing transition metal complexes (IrBr62-, IrCl62-, etc.). A particular focus in this part is on excitation into several vibronic states of the different nature (ligand-to-metal charge-transfer (LMCT) and intraconfigurational), where the lowest-excited intraconfigurational state is accessed via direct femtosecond near-IR (2000 nm) excitation.
Download or read book Perovskite Photovoltaics written by Aparna Thankappan and published by Academic Press. This book was released on 2018-06-29 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perovskite Photovoltaics: Basic to Advanced Concepts and Implementation examines the emergence of perovskite photovoltaics, associated challenges and opportunities, and how to achieve broader development. Consolidating developments in perovskite photovoltaics, including recent progress solar cells, this text also highlights advances and the research necessary for sustaining energy. Addressing different photovoltaics fields with tailored content for what makes perovskite solar cells suitable, and including commercialization examples of large-scale perovskite solar technology. The book also contains a detailed analysis of the implementation and economic viability of perovskite solar cells, highlighting what photovoltaic devices need to be generated by low cost, non-toxic, earth abundant materials using environmentally scalable processes. This book is a valuable resource engineers, scientists and researchers, and all those who wish to broaden their knowledge on flexible perovskite solar cells. Includes contributions by leading solar cell academics, industrialists, researchers and institutions across the globe Addresses different photovoltaics fields with tailored content for what makes perovskite solar cells different Provides commercialization examples of large-scale perovskite solar technology, giving users detailed analysis on the implementation, technical challenges and economic viability of perovskite solar cells
Download or read book Semiconductors Probed by Ultrafast Laser Spectroscopy written by R. R. Alfano and published by . This book was released on 1984 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductors Probed by Ultrafast Laser Spectroscopy, Volume II discusses the use of ultrafast laser spectroscopy in studying fast physics in semiconductors. It reviews progress on the experimental and theoretical understanding of ultrafast events that occur on a picosecond and nanosecond time scale. This volume discusses electronic relaxation in amorphous semiconductors and the physical mechanisms during and after the interaction of an intense laser pulse with a semiconductor. It also covers the relaxation of carriers in semiconductors; transient optical pulse propagation; and methods of tim ...
Download or read book Advances in Solar Energy Research written by Himanshu Tyagi and published by Springer. This book was released on 2018-11-19 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers major technological advancements in, and evolving applications of, thermal and photovoltaic solar energy systems. Advances in technologies for harnessing solar energy are extensively discussed, with topics including the fabrication, compaction and optimization of energy grids, solar cells and panels. Leading international experts discuss the applications, challenges and future prospects of research in this increasingly vital field, providing a valuable resource for all researchers working in this field.
Download or read book Applied Photochemistry written by Rachel C. Evans and published by Springer Science & Business Media. This book was released on 2014-07-08 with total page 619 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Photochemistry encompasses the major applications of the chemical effects resulting from light absorption by atoms and molecules in chemistry, physics, medicine and engineering, and contains contributions from specialists in these key areas. Particular emphasis is placed both on how photochemistry contributes to these disciplines and on what the current developments are. The book starts with a general description of the interaction between light and matter, which provides the general background to photochemistry for non-specialists. The following chapters develop the general synthetic and mechanistic aspects of photochemistry as applied to both organic and inorganic materials, together with types of materials which are useful as light absorbers, emitters, sensitisers, etc. for a wide variety of applications. A detailed discussion is presented on the photochemical processes occurring in the Earth’s atmosphere, including discussion of important current aspects such as ozone depletion. Two important distinct, but interconnected, applications of photochemistry are in photocatalytic treatment of wastes and in solar energy conversion. Semiconductor photochemistry plays an important role in these and is discussed with reference to both of these areas. Free radicals and reactive oxygen species are of major importance in many chemical, biological and medical applications of photochemistry, and are discussed in depth. The following chapters discuss the relevance of using light in medicine, both with various types of phototherapy and in medical diagnostics. The development of optical sensors and probes is closely related to diagnostics, but is also relevant to many other applications, and is discussed separately. Important aspects of applied photochemistry in electronics and imaging, through processes such as photolithography, are discussed and it is shown how this is allowing the increasing miniaturisation of semiconductor devices for a wide variety of electronics applications and the development of nanometer scale devices. The final two chapters provide the basic ideas necessary to set up a photochemical laboratory and to characterise excited states. This book is aimed at those in science, engineering and medicine who are interested in applying photochemistry in a broad spectrum of areas. Each chapter has the basic theories and methods for its particular applications and directs the reader to the current, important literature in the field, making Applied Photochemistry suitable for both the novice and the experienced photochemist.
Download or read book Photochemistry written by Maurizio Persico and published by Springer. This book was released on 2018-05-04 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an introduction to photochemistry for students with a minimal background in physical chemistry and molecular quantum mechanics. The focus is from a theoretical perspective and highlights excited state dynamics. The authors, experienced lecturers, describe the main concepts in photochemical and photophysical processes that are used as a basis to interpret classical steady-state experimental results (essentially product branching ratios and quantum yields) and the most advanced time-resolved techniques. A significant portion of the content is devoted to the computational techniques present in quantum chemistry and molecular dynamics.With its short summaries, questions and exercises, this book is aimed at graduate students, while its theoretical focus differentiates it from most introductory textbooks on photochemistry.
Download or read book Chemically Deposited Nanocrystalline Metal Oxide Thin Films written by Fabian I. Ezema and published by Springer Nature. This book was released on 2021-06-26 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book guides beginners in the areas of thin film preparation, characterization, and device making, while providing insight into these areas for experts. As chemically deposited metal oxides are currently gaining attention in development of devices such as solar cells, supercapacitors, batteries, sensors, etc., the book illustrates how the chemical deposition route is emerging as a relatively inexpensive, simple, and convenient solution for large area deposition. The advancement in the nanostructured materials for the development of devices is fully discussed.
