Download or read book Broadening Spectral Response in Solid state Dye sensitized Solar Cells Via F rster Resonance Energy Transfer written by James Ian Basham and published by . This book was released on 2011 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Device Engineering for Efficient Dye sensitized Solar Cells written by George Yan Margulis and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dye-sensitized solar cells (DSCs) offer a variety of advantages to typical silicon and thin film solar cells. And while the advantages of ease-of-processing and fabrication from low-cost, earth-abundant materials make DSCs an attractive technology, the efficiency of DSCs (13%) is still too low to compete with the current inorganic incumbents. Hence, new 'outside-of-the-box' strategies must be used to render DSCs competitive with current commercial technologies. This thesis describes my work on identifying losses in DSCs and 2 strategies to improve the efficiency of DSCs: the use of highly-soluble energy relay days to broaden the spectral response of DSCs, and the fabrication of semi-transparent solid-state DSCs to help improve the efficiency of inorganic devices in a tandem solar cell. Solid-state dye-sensitized solar cells (ssDSCs) have historically lagged behind their liquid-electrolyte counterparts in efficiency. To gain a better understanding of why this is so, we have developed accurate internal quantum efficiency (IQE) measurements for ssDSCs. By analyzing the IQE, it is found that while charge collection is efficient in ssDSCs, often charge injection is not. This analysis also shows that parasitic absorption by the Spiro-OMeTAD is an important loss mechanism in ssDSCs and suggests that stronger absorbing sensitizers are the most promising path to higher efficiencies. In DSCs, the roles of absorbing light, injecting charge, and blocking recombination are all given to the sensitizing dye, resulting in a myriad of design rules for DSC sensitizers. An energy relay dye (ERD) is a second dye that helps relax these design rules by providing complementary absorption and then transferring energy to a sensitizing dye. However, such ERDs come with their own design rules, including the need for high solubility for full light absorption, and high photoluminescence for efficient energy transfer. We have designed and synthesized two such dyes, and characterized them as ERDs in DSCs, yielding a 65% increase in efficiency. Finally, even if DSCs are unable to reach efficiencies that render them competitive against traditional inorganic solar cells, DSCs can be used in conjunction with an inorganic solar cell in a hybrid tandem photovoltaic (HTPV). High open-circuit voltages and cheap processing render DSCs attractive top cells in HTPVs, and such devices can exceed efficiencies of 20%. However, in order to be used in HTPVs, a DSC must be fabricated such that below bandgap light can pass through the device and be absorbed by the inorganic bottom cell. Toward that end, we have developed a transparent top contact for solid-state dye-sensitized solar cells that renders ssDSCs attractive candidates for HTPVs.
Download or read book Increased Light Harvesting in Dye sensitized Solar Cells Using F rster Resonant Energy Transfer written by Brian E. Hardin and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dye-sensitized solar cells (DSCs) are an emerging photovoltaic technology with the potential for large scale manufacturing and low cost processing. However, the power conversion efficiency of DSCs must increase from 11% to 14% to be commercially competitive with conventional solar cell technologies. DSCs do not completely absorb all of the photons from the visible and near infrared portion of the solar spectrum and consequently have lower short circuit photocurrent densities compared to inorganic photovoltaic devices. A variety of sensitizing dyes have been explored, but it is extremely challenging to develop a single sensitizing dye that can absorb strongly in the visible and near-infrared spectrum. The focus of this doctoral thesis is on developing fundamentally new DSC architectures which incorporate energy transfer processes in order to improve light harvesting. Chapter One will introduce the conventional dye-sensitized solar cell architecture and general operating principles for photocurrent generation. Chapter Two will focus on the general theory behind Forster Resonant Energy Transfer (FRET) and modeling of the average excitation transfer efficiency (ETE), which is the fraction of excited dyes that undergo energy transfer to the sensitizing dye, inside of the DSC. Chapter Three describes a new design where energy relay dyes unattached to the titania absorb high energy photons and transfer their energy to the sensitizing dye via Förster resonant energy transfer. This architecture allows for stronger and broader spectral absorption for the same film thickness. In liquid DSCs, we demonstrate a 26% increase in power conversion efficiency when using an energy relay dye with an organic, near-infrared sensitizing dye and show that the average excitation transfer can be greater than 95%. Chapter Four demonstrates that energy relay dyes can be mixed inside of a solid, organic hole conductor (e.g. spiro-OMeTAD) for solid-state DSCs. Chapter Five describes the concept of using energy relay dyes, cosensitized on the TiO2 surface, that directly absorb near-infrared light and undergo energy transfer to a neighboring a Ruthenium based metal ligand complex (i.e. C106). Near-infrared energy relay dyes have the potential to increase light harvesting in the 700-800 nm portion of the spectrum and can be implemented in state-of-the-art DSC systems. The final chapter will briefly describe the opportunities for future study and potential commercialization of DSCs.
Download or read book Dye sensitized Solar Cells written by Kuppuswamy Kalyanasundaram and published by CRC Press. This book was released on 2010-08-03 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several forms of thin-film solar cells are being examined as alternatives to silicon-solar cells-one of the most promising technologies is the dye-sensitized solar cell (DSC), with proven efficiencies that approach 11%. This book, which provides a comprehensive look at this promising technology, aims to provide both a graduate level text that bring
Download or read book Biomimetic Dye Aggregate Solar Cells written by Peter L. Marek and published by Springer Science & Business Media. This book was released on 2013-09-03 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a new approach to the construction of solar cells. Following nature's example, this approach has the goal to find a biomimetic self-assembling dye, whose aggregates can mimic the natural light-harvesting system of special photosynthetic active bacteria. The thesis investigates methods to control the self-assembly such that suitable dye aggregates are formed with high internal order and size-confinement. The dye aggregates can be implemented into a new type of solar cells, designed to combine the advantages of hybrid solar cells and solid-state dye-sensitized solar cells (ss-DSSCs): dye aggregate solar cells (DASCs). This book describes the construction and first tests of a prototype for DASCs on the basis of the investigated dye aggregates. The described approach has the advantage that it will enable to build up a light-harvesting system fully synthetically in large scale in order to realize low-cost, light-weight and environmentally friendly solar cells - a worthwhile goal towards the exploitation of clean energy from sunlight.
Download or read book Development and Characterization of Improved Solid State Dye sensitized Nanocrystalline Solar Cells written by and published by . This book was released on 2003 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vibrational Spectroscopy of Photosensitizer Dyes for Organic Solar Cells written by Carmen Pérez León and published by Cuvillier Verlag. This book was released on 2006 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interfacial Engineering in Functional Materials for Dye Sensitized Solar Cells written by Alagarsamy Pandikumar and published by John Wiley & Sons. This book was released on 2019-10-30 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers an Interdisciplinary approach to the engineering of functional materials for efficient solar cell technology Written by a collection of experts in the field of solar cell technology, this book focuses on the engineering of a variety of functional materials for improving photoanode efficiency of dye-sensitized solar cells (DSSC). The first two chapters describe operation principles of DSSC, charge transfer dynamics, as well as challenges and solutions for improving DSSCs. The remaining chapters focus on interfacial engineering of functional materials at the photoanode surface to create greater output efficiency. Interfacial Engineering in Functional Materials for Dye-Sensitized Solar Cells begins by introducing readers to the history, configuration, components, and working principles of DSSC It then goes on to cover both nanoarchitectures and light scattering materials as photoanode. Function of compact (blocking) layer in the photoanode and of TiCl4 post-treatment in the photoanode are examined at next. Next two chapters look at photoanode function of doped semiconductors and binary semiconductor metal oxides. Other chapters consider nanocomposites, namely, plasmonic nanocomposites, carbon nanotube based nanocomposites, graphene based nanocomposites, and graphite carbon nitride based nanocompositesas photoanodes. The book: Provides comprehensive coverage of the fundamentals through the applications of DSSC Encompasses topics on various functional materials for DSSC technology Focuses on the novel design and application of materials in DSSC, to develop more efficient renewable energy sources Is useful for material scientists, engineers, physicists, and chemists interested in functional materials for the design of efficient solar cells Interfacial Engineering in Functional Materials for Dye-Sensitized Solar Cells will be of great benefit to graduate students, researchers and engineers, who work in the multi-disciplinary areas of material science, engineering, physics, and chemistry.
Download or read book Dye sensitized Solar Cells written by Songyuan Dai and published by Walter de Gruyter GmbH & Co KG. This book was released on 2022-07-05 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: The operation of everything in the universe needs a special „material“-energy. The earth is no exception. There are many kinds of energy sources on earth. But where does the earth‘s energy come from? The answer is that everything grows under the sun. Developing renewable energy is of strategic importance to achieve sustainable energy supply. Simulating natural photosynthesis is the ultimate goal of effi cient solar energy conversion. Photovoltaic technology has been widely used in industry and will be one of the major energy sources in the future. Developing new materials and structures, the photoelectric conversion effi ciency of solar cells will be improved day by day, and solar cells will attract more and more attention. This book presents principles of solar photovoltaic conversion, and introduces the physical and chemical processes involved. Mechanisms which affect solar cell performance are also discussed.
Download or read book Photoemission Studies of Solid State Dye Sensitised Solar Cells written by Paul F. Kirkham and published by . This book was released on 2009 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A New Sight towards Dye sensitized Solar Cells Material and Theoretical written by Hong Lin and published by Trans Tech Publications Ltd. This book was released on 2010-11-11 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters BCI (WoS). Dye-sensitized solar cell (DSC) technology is emerging, against the current background of drastic consumption-rates of irreplaceable natural resources, as the Cinderella solution to many energy-related problems, Almost since its first appearance, it has been regarded as being the most promising alternative to conventional silicon solar cell technology due to the tremendous advantages of low cost and high theoretical energy-conversion efficiency.
Download or read book Dye sensitized Solar Cells and Solar Cell Performance written by Michael R. Travino and published by Nova Science Publishers. This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dye-Sensitized Solar Cells & Solar Cell Performance
Download or read book Fabrication and Characterization of Poly 4 vinylpyridine Based All Solid State Dye Sensitized Solar Cells by Initiated Chemical Vapor Deposition written by Steven L. Farrell and published by . This book was released on 2014 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The novel technique of initiated chemical vapor deposition (iCVD) was used to develop an all solid state dye-sensitized solar cell (DSSC) using a solid polymer electrolyte. iCVD was chosen for this process due to its advantage in polymerizing within high aspect ratio porous geometries. Poly(4-vinylpyridine) (P4VP) was synthesized via iCVD in a planar geometry on a silicon wafer to observe the effects of iCVD reaction conditions on the deposition rate and properties of the resulting thin film. P4VP-based DSSCs were fabricated in iCVD using previously described methods for other polymers. Using N-719 ruthenium dye, the DSSCs were fabricated and tested with linear sweep voltammetry. The results were compared to liquid-based DSSCs prepared using similar materials and methods without iCVD treatment. The deposition rate of iCVD has been found to have a positive, linear relationship to the ratio of monomer pressure to saturation pressure (PMono/PSat). This change is independent of how the reaction conditions were varied, as changes in pressure and temperature carried the same effect on deposition rate. The P4VP-based cells exhibited efficiencies up to 1.5% compared to the liquid-based cell efficiencies up to 3.1%, however the polymer cells had a fill factor that was up to 10% greater than that of the liquid cells. The average short-circuit current density for the P4VP-based cells was 4.14 ± 0.35 mA/cm2 compared to the liquid cell average of 10.42 ± 0.19 mA/cm2. The average open-circuit voltage for the P4VP-based cells was 0.516 ± 0.005 V compared to the liquid cell average of 0.490 ± 0.003 V.
Download or read book Materials Development for Solid state Dye sensitized Solar Cells written by and published by . This book was released on 2012 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fabrication and Characterization of Solid state Dye Sensitized Solar Cells Incorporating Hydroxy attached Ruthenium Dye and Carbon Nanotubes written by 羅喬嶽 and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Development of Efficient Solid state Dye sensitized Solar Cells written by Wen Yuan and published by . This book was released on 2013 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dye Sensitized Solar Cells written by Adarsh Kumar Pandey and published by Elsevier. This book was released on 2021-10-27 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dye-Sensitized Solar Cells: Emerging Trends and Advanced Applications is highly focused on addressing all aspects of dye sensitized solar cell technology. In this book, the authors present systematic analysis and working principles and detailed studies of individual components, manufacturing methods, software assisted design surrounding the technology market, commercialization potential, and performance evaluations and detailed fabrication methods and parameters. As there is no specific book which could encircle all the aspects of dye sensitized solar cells from its very basic working principles to advanced approached to improve it efficiency, this book fills that gap. Providing a comprehensive study on dye sensitized solar cells, this reference covers basic working principles to advanced approaches in improving efficiency as well as thermodynamic and kinetic studies. It will be ideal for advanced stage researchers and engineers looking to get a grip on DSSC technology. Provides a compilation of all-important principles and advanced research in the field of dye sensitized solar cells Specifies constituents of each DSSC, from basic to advanced level Details advances in fabrication and software assisted design of DSSC
