Fabrication and Characterization of CuPc Based Organic Solar Cells PDF Download
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Author: Balaji Parthasarathy
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Balaji Parthasarathy
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Subhash C. C. Vallurupalli
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Mahmoud Abdelfatah
Publisher: Cuvillier Verlag
ISBN: 3736982968
Category : Technology & Engineering
Languages : en
Pages : 130
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The low cost and low temperature electrochemical deposition technique was employed to grow Cu2O thin films and ZnO:Al thin films were deposited by d.c. magnetron sputtering in order to fabricate solar cells. The potentiostatic and galvanostatic electrodeposition modes were used to deposit the Cu2O thin films. Raman spectra of thin films have shown characteristic frequencies of crystalline Cu2O. The contact between Cu2O and Au is found to be an Ohmic contact. The devices grown by a potentiostatic mode have higher efficiency than those grown by a galvanostatic mode. The optimum thickness of Cu2O thin films as an absorber layer in solar cells. was found to be around 3 µm respect to a high efficiency. Flexible and light weight solar cell was fabricated on plastic substrate.
Author: Emre Yengel
Publisher:
ISBN: 9781124400662
Category : Energy conversion
Languages : en
Pages : 81
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Bulk heterojunction organic solar cells have recently drawn tremendous attention because of their technological advantages for actualization of large-area and cost effective fabrication. Two important criteria of these cells are efficiency and cost. The research in this dissertation focuses on the enhancement of these criteria with two different approaches. In the first approach, power conversion efficiency of organic photovoltaic devices is enhanced by introducing Deoxyribonucleic acids DNA into the device structure. DNA provide exciting opportunities as templates in self assembled architectures and functionality in terms of optical and electronic properties. In the first method, we investigate the effects of DNA and metalized DNA sequences in polymer fullerene bulk-heterojunction (BHJ) solar cells. These effects are characterized via optical, quantum efficiency and current-voltage measurements. We demonstrate that by placing on the hole collection side of the active layer, DNA and Pt-DNA sequences lead to an increase in the power conversion efficiency (PCE) by %16 and %30, respectively. Furthermore, we studied the electrical charge characteristics of our DNA layer by using capacitance-voltage (C-V) measurements to explain the increase in hole collection which shows that spray coated DNA formed a negative layer which can increase the hole collection in the cathode side. In the second approach, device cost is tried to reduce by replacing the most expansive material, indium thin oxide (ITO) thin films, with graphene thin films. Large area graphene films were grown with chemical vapor deposition (CVD) method. It is observed that, its pristine form, the electrical and surface properties of these films are not sufficient enough for the organic photovoltaic applications. These properties are enhanced with a surface treatment of Argon (Ar) plasma and nitric acid bath. The results of these treatments show that the surface becomes hydrophilic and surface resistance can be decreased by %25. Then, it is demonstrated that the PCE of the graphene based solar cells can be reached up to one tenth of the ITO based devices. The research conducted in this dissertation offers promising potential of bulk heterojunction organic solar cells as a clean and affordable source of energy source in the near future.
Author: Pankaj Kumar
Publisher: CRC Press
ISBN: 1315353628
Category : Science
Languages : en
Pages : 452
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This book contains detailed information on the types, structure, fabrication, and characterization of organic solar cells (OSCs). It discusses processes to improve efficiencies and the prevention of degradation in OSCs. It compares the cost-effectiveness of OSCs to those based on crystalline silicon and discusses ways to make OSCs more economical. This book provides a practical guide for the fabrication, processing, and characterization of OSCs and paves the way for further development in OSC technology.
Author: Andrea Miranda
Publisher:
ISBN:
Category :
Languages : en
Pages :
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A solar cell is a device that converts light energy into electrical energy. Solar cells hold plenty of potential in becoming a more widely available source of electricity that makes economic sense. However, improvements in the materials and fabrication are necessary to increase accessibility and power conversion efficiency. Organic, or carbon-based materials, pose an interesting alternative to traditional silicon-based solar cells. An organic solar cell (OSC) composed of thin films deposited onto a glass or flexible polymer substrate could be the future of economically viable solar energy. In this thesis, we describe the fabrication of a type of organic solar cell, the polymer:fullerene bulk-heterojunction solar cells. This is the first attempt to fabricate a device in the Solar Cell Fabrication and Characterization Laboratory. We have replicated the OSC fabrication process outlined by the Yang Group (Shrotriya et al., 2006) with a goal of demonstrating a properly functioning solar cell competitive with state of the art devices. Fabrication of the OSC begins with deposition of an organic, hole-conducting film poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Next, the active layer composed of poly(3-hexylthiophene-2,5-diyl) (polythiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM, a fullerene derivative), is mixed in a 1:1 ratio and deposited from solution as one film. These two organic thin-films were deposited by spin-casting solutions of different concentration at different spin speeds to achieve varying thicknesses. Lastly, thermal evaporation was used to deposit the calcium and silver metal cathode. The thickness of various layers in the OSC sandwich structure was measured with an atomic force microscope. Film uniformity was determined with an optical microscope. The I-V characteristics were measured with a parameter analyzer. Because the thickness is a critical parameter in the optimization of device efficiency, we have determined the relationship between thickness and spin speed of the organic thin films. Our results indicate that we have successfully achieved, for the first time, on par with recent results in the literature, a fully functioning solar cell with I-V characteristics reaching those of the Yang group.
Author: Sri Krishna Domakonda
Publisher:
ISBN:
Category : Hybrid solar cells
Languages : en
Pages : 252
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Author: Liang Wang
Publisher:
ISBN:
Category : Energy conversion
Languages : en
Pages : 124
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Author: Sabu Thomas
Publisher: Elsevier
ISBN: 012820883X
Category : Technology & Engineering
Languages : en
Pages : 610
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Design, Fabrication, and Characterization of Multifunctional Nanomaterials covers major techniques for the design, synthesis, and development of multifunctional nanomaterials. The chapters highlight the main characterization techniques, including X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, and scanning probe microscopy.The book explores major synthesis methods and functional studies, including: - Brillouin spectroscopy; - Temperature-dependent Raman spectroscopic studies; - Magnetic, ferroelectric, and magneto-electric coupling analysis; - Organ-on-a-chip methods for testing nanomaterials; - Magnetron sputtering techniques; - Pulsed laser deposition techniques; - Positron annihilation spectroscopy to prove defects in nanomaterials; - Electroanalytic techniques. This is an important reference source for materials science students, scientists, and engineers who are looking to increase their understanding of design and fabrication techniques for a range of multifunctional nanomaterials. - Explains the major design and fabrication techniques and processes for a range of multifunctional nanomaterials; - Demonstrates the design and development of magnetic, ferroelectric, multiferroic, and carbon nanomaterials for electronic applications, energy generation, and storage; - Green synthesis techniques and the development of nanofibers and thin films are also emphasized.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 142
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