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2 edition of Modelling, fabrication and characterisation of a quantum dot solar concentrator. found in the catalog.

Modelling, fabrication and characterisation of a quantum dot solar concentrator.

Sarah J. Gallagher

Modelling, fabrication and characterisation of a quantum dot solar concentrator.

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Published by The author] in [S.l .
Written in English


Edition Notes

Thesis (Ph. D.) - University of Ulster, 2004.

ID Numbers
Open LibraryOL16260664M

Quantum wells in photovoltaic cells C. Rohr The importance of very high concentration in 3rd generation solar cells C. Algora Intermediate band solar cells A. Marti et. al Multi-interface novel devices: Models with a continuous substructure Z.T. Kuznicki Quantum dot solar cells A.J. Nozik Progress in thermophotovoltaic converters B. Bitnar et. al.   This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies by:   Quantum dot solar windows go non-toxic, colorless, with record efficiency by Los Alamos National Laboratory The luminescent solar concentrator could turn any window into a daytime power source.   Synthesis of PbS quantum dots (QDs) Oleate-capped PbS quantum dots (QDs) were synthesized according to a previously published method A mixture of g of lead oxide (%), 10 g of 1-octadecene (ODE, more than 95%), and g of oleic acid (more than 90%) was degassed at K for 2 h.


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Modelling, fabrication and characterisation of a quantum dot solar concentrator. by Sarah J. Gallagher Download PDF EPUB FB2

The fabrication and full characterization of luminescent solar concentrators (LSCs) comprising CdSe core/multishell quantum dots (QDs) is reported. TEM analysis shows that the QDs are well dispersed in the acrylic medium while maintaining a high quantum yield of 45%, resulting in highly transparent and luminescent polymer by: Modelling, fabrication and characterisation of a quantum dot solar concentrator.

By Sarah J Gallagher. Abstract. EThOS - Electronic Theses Online ServiceGBUnited Kingdo Topics: - Mechanical, industrial, civil and marine engineering, general Author: Sarah J Gallagher. Modelling, fabrication and characterisation of a quantum dot solar concentrator Author: Gallagher, Sarah J.

Awarding Body: University of Ulster Current Institution: Ulster University Date of Award: Availability of Full Text. FABRICATION AND CHARACTERIZATION OF A QUANTUM DOT-SENSITIZED SOLAR CELL by Kevin J.

Emmett Thesis Submitted to the Faculty of the Graduate School of Vanderbilt University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE in Physics August, Nashville, Tennessee Approved: Sandra J.

Rosenthal Sharon M. Weiss. Abstract. Quantum dot solar concentrators (QDSCs) are static, non-imaging concentrators which concentrate both direct and diffuse light.

Using Monte-Carlo ray-trace modelling, concentration ratios (C) were predicted for QDSCs of different 2-D geometries. The optimum shape and size were determined, for given system parameters, Cited by: 7. The luminescent properties of core-shell quantum dots are being exploited in an unconventional solar concentrator, which promises to reduce the cost of photovoltaic electricity.

Luminescent solar collectors have advantages over geometric concentrators in that tracking is unnecessary and both direct.

Introduction. Solar energy has great potential to provide a clean and sustainable energy supply in the future due to abundant availability. Nearly 51% of solar radiation reaches the Earth’s surface with a theoretical potential of × 10 5 TW y −1 (Markvart, ), and 14 TW h − challenge is to develop technology that can utilize this vast potential and convert it in an Cited by:   The luminescent properties of core-shell quantum dots are being exploited in an unconventional solar concentrator, which promises to reduce the cost of photovoltaic electricity.

Luminescent solar collectors have advantages over geometric concentrators in that tracking is unnecessary and both direct and diffuse radiation can be by: 2.

The quantum dot concentrator (QDC) We have recently proposed a novel concentrator [3] in which the dyes are replaced by quantum dots (QDs).

The first advantage of the QDs over dyes is the ability to tune the absorption threshold simply by choice of dot diameter. Secondly, high luminescence quantum efficiency has been observed. Luminescent Solar Concentrators (LSCs) offer a very useful and promising approach to improve solar energy harvesting and increase the efficiency of photovoltaic cells.

In this feature article, we review the progress on the utilisation of semiconducting nanocrystals or quantum dots Cited by:   Luminescent solar concentrators (LSCs) can serve as large-area sunlight collectors for terrestrial and space-based photovoltaics.

Due to their high emission efficiencies and readily tunable emission and absorption spectra, colloidal quantum dots have emerged as a new and promising type of LSC by: This work reports on a diameter dependence analysis of the performance as luminescent solar concentrators of three self-fabricated polymer optical fibers (POFs) doped with a hybrid combination of dopants.

The works carried out include the design and self-fabrication of the different diameter fibers; an experimental analysis of the output power, of the output irradiance Author: Itxaso Parola, M.

Asuncion Illarramendi, Florian Jakobs, Jana Kielhorn, Daniel Zaremba, Hans-Hermann. Quantum dots for Luminescent Solar Concentrators. the progress on the utilisation of semiconducting nanocrystals or quantum dots (QDs) in LSCs. for theoretical modelling. Luminescent solar concentrators (LSCs) are envisioned to reduce the cost of solar electricity by decreasing the usage of more expensive photovoltaic (PV) materials and diminishing the complexity of multi-cell PV by: Silicon quantum dots with indirect bandgap photoluminescence are promising luminophores for large-area luminescent solar concentrators (LSCs).

However, if commercially viable devices are to be achieved, silicon quantum dots must be dispersed within functional, light-guiding matrices such as acrylic slabs without losing their high photoluminescent quantum yield or succumbing Cited by: 8.

To enhance the performance of luminescent solar concentrator (LSC), there is an increased need to search novel emissive materials with broad absorption and large Stokes shifts. I-III-VI colloidal CuInS2 and CuInSe2 based nanocrystals, which exhibit strong photoluminescence emissions in the visible to near infrared region with large Stokes shifts, are expected to.

We investigate the performance of cylindrical luminescent solar concentrators (CLSCs) with near-infrared lead sulfide quantum dots (QDs) in the active region. We fabricate solid and hollow cylinders from a composite of QDs in polymethylmethacrylate, prepared by radical polymerization, and characterize sample homogeneity and optical properties using spectroscopic techniques.

A computer code for ray tracing simulations of quantum dot solar concentrators has been developed at EPFL-LESO on the basis of Monte Carlo methods that are applied to polarization-dependent reflection/transmission at interfaces, photon absorption by the semiconductor nanocrystals and photoluminescent by: 6.

Dispersion of quantum dots (QDs) into a PMMA polymer matrix is promising for luminescent solar concentrator applications in improving the application of photovoltaic cells in both efficiency and flexibility. However, some problems like self-absorption of emitted light, drastic agglomeration, and the oxidation of QDs limit the application of by: 8.

contributions dealing with advanced, scalable micro/nano-fabrication technique, the development of low-cost fabrication of material and devices, are also of relevance. Finally, the conference also welcomes new and emerging methods in simulation of PV and hybrid photonic/PV devices, including but not limited to 3D-drift diffusion and RCWA models.

A quantum dot solar cell (QDSC) is a solar cell design that uses quantum dots as the absorbing photovoltaic material. It attempts to replace bulk materials such as silicon, copper indium gallium selenide or cadmium telluride ().Quantum dots have bandgaps that are tunable across a wide range of energy levels by changing their size.

In bulk materials, the bandgap is. Abstract. The performance of InAs/GaAs quantum dot solar cells was investigated up to an optical concentration of suns. A high temperature spacer layer between successive layers of quantum dots was used to reduce the degradation in the open circuit voltage relative to a control device without quantum dots.

Quantum dots are proposed as luminescent species in luminescent solar concentrators in combination with thin film silicon solar cells. As both tuning absorption and emission properties of quantum dots is possible by adapting process conditions, as well as tuning the band gap of thin film silicon solar cells, an optimum combination is expected to exist for which the conversion Cited by: 2.

Charge injection barriers are found in PbS/ZnO colloidal quantum dot solar cells though the use of temperature dependent current-voltage and capacitance-voltage measurements. The injection barriers are shown to shown to complicate the Mott-Schottky capacitance analysis which determines built-in bias and doping density.

C-Y. Hung, Sogabe, N. Miyashita, S. Naitoh, and Y. Okada, “Fabrication of Hybrid ErAs:InAs Quantum Dots for Solar Cell Application”, The 6th World Conference on Photovoltaic Energy Conversion (WCPEC-6), Kyoto (Nov. Luminescent solar concentrators (LSCs) have the potential to significantly contribute to solar energy harvesting strategies in the built environment.

For the practical realisation of LSC technology, the ability to create large area devices, which contain considerable volumes of high quality luminescent speci Celebrating Excellence in Research: Women of Materials Science.

A novel, non-tracking concentrator is described, which uses nano-scale quantum dot technology to render the concept of a fluorescent dye solar concentrator (FSC) a practical proposition. The quantum dot solar concentrator (QDSC) comprises quantum dots (QDs) seeded in materials such as plastics and glasses that are suitable for incorporation into.

Luminescent solar concentrators (LSCs) can serve as large-area sunlight collectors for photovoltaic devices. An important LSC characteristic is a concentration factor (C), which is defined as the ratio of the output and the input photon flux densities.

This parameter can be also thought of as an effective enlargement factor of a solar cell active by: Quantum dots (QDs) are useful for demonstrating the particle-in-a-box (PIB) model utilized in quantum chemistry, and can readily be applied to a discussion of both thermodynamics and kinetics in an undergraduate laboratory setting.

Modifications of existing synthetic procedures were used to create QDs of different sizes and compositions (CdS passivated with polymer, Author: Christina A. Bauer, Terianne Y. Hamada, Hyesoo Kim, Mathew R.

Johnson, Matthew J. Voegtle, Matthew S. Cohen joined GE Lighting after receiving his Ph.D. from the University of Michigan in He has developed a variety of experiences through roles of increasing responsibility in Technology, Manufacturing, and Business Operations that include phosphors and specialty materials development, lighting product design and manufacturing, tungsten wire processing, and.

@article{osti_, title = {Luminescent solar concentrators}, author = {Friedman, P.S.}, abstractNote = {Various planar configurations of the luminescent solar concentrator (LSC) are discussed including the uniformly doped, the stacked plate, the thin film, and the multilayered film LSC.

Radiation which is lost from the luminescent plate by falling within the critical angle for. Schematic showing the benefits of a spectrally-selective top mirror on a luminescent solar concentrator. The red layer in the LSC is embedded with CdSe/CdS quantum dots. Solar cells are mounted to the left, right, front, and back faces of the polymer waveguide A diffuse mirror is mounted to the bottom face of the waveguide with a air by: The solar cells were illuminated monochromatically by using the same white light source to achieve the characterization of quantum efficiency versus excitation PL emission spectrum for MQWs solar cells structure fabricated by InGaN alloys materials with In content about and GaN is shown in Figure 5, and exhibits an PL Author: Shaoguang Dong, Kanghua Chen, Guojie Chen, Xin Chen.

About Dr. Hubbard’s research focuses on Photovoltaic and Optoelectronic Devices, Radiation Hardened Space Power, III-V Semiconductors, and Vapor Phase Epitaxy.

Our activities encompass materials synthesis, device fabrication, material and device modeling, as well as characterization both at the electrical and materials level. Specific expertise lies in vapor. quantum dot decreases, resulting a red to blue shift in the electromagnetic spectra.

Excitation and emission of the quantum dot are therefore highly tunable. (Fig. 2) Fig. A typical fluorescence spectra of different size CdSe quantum dots (A), and illustration of the relative particle sizes (B). From left to right, the particle diameters are.

Skylights and windows are building openings that enhance human comfort and well-being in various ways. Recently, a massive drive is witnessed to replace traditional openings with building integrated photovoltaic (BIPV) systems to generate power in a bid to reduce buildings’ energy.

The problem with most of the BIPV glazing lies in the obstruction of occupants’ vision Cited by: 4. Quantum dots (QDs) are tiny semiconductor particles a few nanometres in size, having optical and electronic properties that differ from larger particles due to quantum are a central topic in the quantum dots are illuminated by UV light, an electron in the quantum dot can be excited to a state of higher energy.

Phase Change Materials for Solar Energy Applications in, editor(s)Vikas Mittal, Phase Change Materials, Central West Publishing,pp21 - 53, [Hoda Akbari, David G Peña, Rebeca S Pizarro, Hind Ahmed, Maria C.

Browne, Chuka O'koli,Edward Guionneau, Ming Jun Huang and Sarah J. McCormack] Book Chapter, TARA - Full Text URL. Posted: Quantum dot solar cell exhibits fold concentration (Nanowerk News) By combining designer quantum dot light-emitters with spectrally matched photonic mirrors, a team of scientists with Berkeley Lab and the University of Illinois created solar cells that collect blue photons at 30 times the concentration of conventional solar cells, the highest luminescent.

Cylindrical luminescent solar concentrators with near-infrared quantum dots. Inman, G. Shcherbatyuk, D. Medvedko, A. Gopinathan, and S. Ghosh* School of Natural Sciences, University of California, Merced, CAUSA *[email protected] Abstract: We investigate the performance of cylindrical luminescent solar concentrators (CLSCs.

National Laboratory Scales Up Quantum-dot Solar Project Instead of palm-sized prototypes and models, they created the solar window that is large enough to power entire buildings as reported by Inhabitat.

LSCs or luminescent solar concentrators are a crucial component of the team’s solar windows as stated by the National laboratory. LSCs.R. Cheriton and K. Hinzer, InGaN/GaN quantum dot-nanowire solar cells on silicon for concentrated photovoltaics, CPV, 13th International Conference on Concentrator Photovoltaic Systems, Ottawa, Canada, May The quantum dots consist of a CdSe inner core, a Cd 1− x Zn x S outer shell, and are coated in silica for protection from oxidation—with the outer shell acting like an absorber.

When a photon.