Download or read book Synthesis And Characterization Of Doped ZnO Nanomaterials Potential Application In Third Generation Solar Cells written by Echo D. Adcock Smith and published by . This book was released on 2017 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Facile Synthesis and Characterization of Al Doped ZnO Nanostructures and Their Applications in Sensors and Solar Cells written by 唐健富 and published by . This book was released on 2017 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Zinc Oxide Nanostructures Synthesis and Characterization written by Sotirios Baskoutas and published by MDPI. This book was released on 2018-12-04 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Zinc Oxide Nanostructures: Synthesis and Characterization" that was published in Materials
Download or read book Synthesis of Zinc Oxide by Sol Gel Method for Photoelectrochemical Cells written by Siti Salwa Alias and published by Springer Science & Business Media. This book was released on 2013-11-20 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the study of synthesized ZnO powder using Zn(CH3COO)2∙2H2O precursor, methanol (as solvent), and sodium hydroxide (NaOH) to vary the pH. The successfully synthesized ZnO powder from the sol-gel centrifugation and sol-gel storage methods were characterized and investigated by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, UV–visible spectroscopy, and photoluminescence test to compare the properties of the nanoparticles. The best characteristic of the ZnO powder from both methods was observed when the powders were coated on an ITO glass to fabricate a PEC. The current density–voltage performances of both PECs were investigated under luminescent and dark conditions.
Download or read book ZnO and Their Hybrid Nano Structures written by Gaurav Sharma and published by Materials Research Forum LLC. This book was released on 2023-06-05 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: ZnO and its hybrid nanostructures have unique optical, physical and chemical properties. The book covers recent trends in processing techniques and applications. Topics include solar cells, photo-voltaic devices, fuel cells, uv filters, lasers, light-emitting diodes, photo-detectors, spin-tronic devices, magnetic semiconductors, nano-generators, piezotronics, photo-catalytic applications against harmful organic pollutants like dyes, heavy metals, antibiotics, and sensors such as bio sensors, chemical sensors, gas sensors. Keywords: ZnO, Nano ZnO, Point Defects, Magnetic Semiconductors, Hybrid Nanostructures, Cell Applications, Nanoadsorbant for Heavy Metal Removals, Diagnostics, ZnO Nano-Carriers, ZnO Thin Films Fabrication.
Download or read book Nanomaterials for Solar Cell Applications written by Sabu Thomas and published by Elsevier. This book was released on 2019-06-12 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials for Solar Cell Applications provides a review of recent developments in the field of nanomaterials based solar cells. It begins with a discussion of the fundamentals of nanomaterials for solar calls, including a discussion of lifecycle assessments and characterization techniques. Next, it reviews various types of solar cells, i.e., Thin film, Metal-oxide, Nanowire, Nanorod and Nanoporous materials, and more. Other topics covered include a review of quantum dot sensitized and perovskite and polymer nanocomposites-based solar cells. This book is an ideal resource for those working in this evolving field of nanomaterials and renewable energy. - Provides a well-organized approach to the use of nanomaterials for solar cell applications - Discusses the synthesis, characterization and applications of traditional and new material - Includes coverage of emerging nanomaterials, such as graphene, graphene-derivatives and perovskites
Download or read book ZnO and TiO2 Based Nanostructures written by Andrea Lamberti and published by MDPI. This book was released on 2018-10-15 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "ZnO and TiO2 Based Nanostructures" that was published in Nanomaterials
Download or read book 1 dimensional Zinc Oxide Nanomaterial Growth and Solar Cell Applications written by Hyung Woo Choi and published by . This book was released on 2012 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) has attracted much interest during last decades as a functional material. Furthermore, ZnO is a potential material for transparent conducting oxide material competing with indium tin oxide (ITO), graphene, and carbon nanotube film. It has been known as a conductive material when doped with elements such as indium, gallium and aluminum. The solubility of those dopant elements in ZnO is still debatable; but, it is necessary to find alternative conducting materials when their form is film or nanostructure for display devices. This is a consequence of the ever increasing price of indium. In addition, a new generation solar cell (nanostructured or hybrid photovoltaics) requires compatible materials which are capable of free standing on substrates without seed or buffer layers and have the ability introduce electrons or holes pathway without blocking towards electrodes. The nanostructures for solar cells using inorganic materials such as silicon (Si), titanium oxide (TiO2), and ZnO have been an interesting topic for research in solar cell community in order to overcome the limitation of efficiency for organic solar cells. This dissertation is a study of the rational solution-based synthesis of 1-dimentional ZnO nanomaterial and its solar cell applications. These results have implications in cost effective and uniform nanomanufacturing for the next generation solar cells application by controlling growth condition and by doping transition metal element in solution.
Download or read book Doped and Modified ZnO Nanoparticles for Optoelectronics Application written by Shashi Bhushan Rana and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a clear and comprehensive coverage of the synthesis and characterization techniques of pure prepared semiconductor ZnO, doped ZnO and Modified ZnO nanoparticles which have potential applications in optoelectronics devices. Salient features involves: Synthesis and structural, optical characterization of pure and doped (Cu and Sb) ZnO nanoparticles. Synthesis and structural, optical characterization of modified ZnO nanoparticles using 2-aminothiols and 2-aminothiophenol as the capping agent for surface modification of ZnO nanoparticles. Possible optoelectronics application has been discussed by using modified ZnO nanoparticles for the realization of molecular AND gate.
Download or read book Three Dimensional Zinc Oxide Nanostructure Synthesis and Photonic Applications written by Jimmy Yao and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to investigate zinc oxide (ZnO)-based photonic nanostructure fabrications and their applications to solar energy. In the first section, a three-dimensional (3-D) ZnO nanoforest with large surface areas and good electron transport properties has been synthesized successfully by a two--step hydrothermal process and applied to the photoelectrode for a dye-sensitized solar cell (DSSC). The experimental results show that the solar conversion efficiency of the 3-D ZnO nanoforest is much higher than that of one-dimensional (1-D) ZnO nanorod arrays owing to its much larger surface areas. In the second section, zinc oxide/titanium dioxide (ZnO/TiO2) nanocomposite photoelectrodes for DSSC with density-controlled capability are presented. A high open-circuit voltage of up to 0.93 V was successfully achieved. To the best of the author's knowledge, this is the highest open--circuit voltage reported in the literature; this is beneficial for achieving a high-efficiency DSSC. The physical mechanism of high open-circuit voltage has been demonstrated and confirmed by electrochemical impedance spectroscopy; a reduced recombination loss was achieved with an improved charge carrier diffusion path. In addition, ZnO/TiO2 nanocomposite photoelectrodes have proven to further improve solar conversion efficiency as compared to conventional TiO2 nanoparticles photoelectrodes. In total, several future research topics that could benefit from the analysis in this dissertation have been examined.Although the development of ZnO nanostructures has been studied extensively by various synthesis methods in the past decade, this dissertation is focused on the practical aspect of synthesizing ZnO nanostructures on transparent conductive oxide substrates directly for the application of dye-sensitized solar cells in a low-cost manner. The dissertation is divided into six chapters and the contents of every chapter is briefly introduced as follows. Chapter 1 introduces the motivation of the dissertation. Chapter 2 presents the synthesis and characterization of ZnO nanostructures for one-dimensional (1-D) and three-dimensional (3-D) systems. 1-D ZnO nanostructures--ZnO nanowires--were delivered by a rapid growth microwave-assisted vapor--liquid--solid method. 3-D ZnO hierarchical nanostructures--ZnO nanoforest--were synthesized via a cost-effective hydrothermal method. The obtained ZnO nanoforest has the potential to break through the limitation of the surface areas of DSSC. Chapter 3 presents the synthesis and characterization of ZnO/TiO2 composite nanostructures. The discussions were focused on the density-controlled capability of ZnO nanorod arrays and the conformal shell coating of ZnO--TiO2 core--shell nanostructures which have the feasibility to provide a direct electron transport pathway for conventional TiO2 nanoparticles DSSC. Chapter 4 investigates the DSSC performances from ZnO nanoforest photoelectrodes and ZnO/TiO2 nanocomposite photoelectrodes. Moreover, a high open-circuit voltage is reported and the physical mechanism is discussed and verified with electrochemical impedance spectroscopy. Furthermore, the overall solar conversion efficiency can be improved by this nanocomposite photoelectrode.In addition, radiation detection has been investigated during my Ph.D. studies. Chapter 5 demonstrates the standoff alpha radiation detection technique based on the physical mechanism of excited state absorption of air molecules. Both theoretical analysis and experimental verifications were conducted. The experimental results confirmed that the radiation could be detected at a 10 m standoff distance.Chapter 6 summarizes the dissertation with two developed photoelectrodes with the improvement of surface areas and electron transport property for a high solar conversion efficiency of DSSC and proposes potential future works regarding to further enhanced the efficiency.
Download or read book Multifunctional Oxide Based Materials From Synthesis to Application written by Teofil Jesionowski and published by MDPI. This book was released on 2019-09-03 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with novel aspects and perspectives in metal oxide and hybrid material fabrication. The contributions are mainly focused on the search for a new group of advanced materials with designed physicochemical properties, especially an expanded porous structure and defined surface activity. The proposed technological procedures result in an enhanced activity of the synthesized hybrid materials, which is of great importance when considering their potential fields of application. The use of such materials in different technological disciplines, including aspects associated with environmental protection, allows for the verification of the proposed synthesis method. Thus, it can be stated that those aspects are of interdisciplinary character and may be located at the interface of three scientific disciplines—chemistry, materials science, and engineering—as well as environmental protection. Furthermore, the presented scientific scope is in some way an answer to the continuous demand for such types of materials and opens new perspectives for their practical use
Download or read book Pyrolysis of Carbon Doped ZnO Nanoparticles for Solar Cell Application written by Luyolo Ntozakhe and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is very important to find new methods for improving the properties of nanostructured materials that can be used to replace the highly expensive and complicated techniques of fabricating ZnO nano-powders for solar cell applications. Pneumatic spray pyrolysis method offers a relatively inexpensive way of fabricating ZnO nanomaterials of controllable morphology, good crystallinity and uniform size distribution, which makes it a good candidate for the production of ZnO nanoparticles. Additionally, it has the advantage of producing ZnO NPs in one step directly on the substrate without the need for other wet chemistry processes like purification, drying and calcination. To that end, the present study emphasizes more on the design and optimization of spray pyrolysis system as well as on the pneumatic spray pyrolysis conditions for the production of carbon-doped ZnO nanoparticles. The un-doped and carbon-doped ZnO NPs were prepared using pneumatic spray pyrolysis employing zinc acetate as a precursor solution and tetrabutylammonium as a dopant. The fabricated un-doped and C-ZnO NPs were characterized for their morphological, structural and optical properties using SEMEDX, XRD and DRS. SEM analysis has revealed that the fabricated un-doped and C-ZnO NPs have spherical shape with mesoporous morphology. The cross-sectional SEM has also revealed that the film thickness changes with increasing dopant concentration from 0.31 to 0.41¬†Œom at higher concentrations. Moreover, the EDX spectra have confirmed the presence of Zn and O atoms in the PSP-synthesized ZnO NPs. XRD analysis of both un-doped and C-ZnO has revealed the peaks belonging to hexagonal Wurtzite structure of ZnO. Additionally, the DRS has revealed a decrease in energy band gap of the synthesized ZnO NPs, with the increase in carbon dopant level.
Download or read book Handbook of Nanoelectrochemistry written by Mahmood Aliofkhazraei and published by Springer. This book was released on 2015-11-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited book is devoted to different electrochemical aspects of nano materials. This comprehensive reference text is basically divided in 3 parts: electrochemical synthesis routes for nanosized materials, electrochemical properties of nano materials and electrochemical characterization methods for nanostructures. The Handbook is a reference work to chemists and materials scientists interested in the nano aspects of electrochemistry. The chapters are written by a number of international experts in the field and the content will assist members of both electrochemical and materials communities to keep abreast of developments in the field.
Download or read book Hydrothermal Synthesis of Al doped ZnO Nanowires and Their Application for Photovoltaic Devices written by Hyoungwon Park and published by . This book was released on 2014 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor nanostructures exhibit distinct properties by virtue of nano-scale dimensionality, resulting in recent interest in semiconducting nanowires for electronic, photonic, and energy applications. Along with nanowires, quantum dots are solution-processable nanocrystals with tunable band gap energies as a function of their size. Based on all of these promising properties that nanostructures exhibit, nanowires and quantum dots are excellent candidates for next-generation optoelectronic devices, including solar cells and light-emitting diodes. However, the realization of nanostructured materials for solar cell device applications is limited by the fundamental trade-off between light absorption and photocarrier collection. Vertically aligned ZnO nanowire arrays can decouple absorption and collection by acting as highly-conductive channels for extracting photogenerated electrons from deep within the film. This thesis illustrates a scheme for the development of ordered bulk heterojunction photovoltaic devices incorporating solution-based n-type doped ZnO nanowires and PbS quantum dots. In order to improve the electrical properties of ZnO nanowires, Al doping of hydrothermally synthesized ZnO nanowires is studied along with the optimization of doping concentration. The morphology of ZnO nanowire arrays is also studied as a function of the doping concentration in the growth solution. Finally, photovoltaic devices are fabricated and the effect of Al-doping of ZnO nanowires is investigated by device characterization techniques.
Download or read book Size dependent Synthesis Characterization and Biomedical Applications of Zinc Oxide Nanoparticles written by Ryan Theodore Spidle and published by . This book was released on 2012 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is a chemically and thermally stable n-type semiconducting material with many applications including solar cells, piezoelectrics, and fuel cell devices due to their flexible use in chemical sensing. ZnO has a wide band gap and fast electron transfer that makes it a promising candidate for a supporting matrix in the fabrication of biosensors. ZnO's high isoelectric point facilitates its binding with many enzymes proteins, DNA, and RNA providing potential use in biomedical applications. Here, we hydrothermally synthesized ZnO nanoparticles at low temperature conditions. Solvent, precursor, and reaction temperatures as well as reaction times were varied resulting in controlling the size, morphology and properties of the particles. These ZnO nanoparticles were characterized extensively by employing the use of scanning electron microscopy (SEM), infrared spectroscopy (IR), X-ray photoelectron spectroscopy (XPS) among other techniques. These nanoparticles were coupled with multi-walled carbon nanotubes (MWNT) to fabricate hydrogen peroxide (H2O2) and glucose sensors. ZnO is also demonstrated to potentially increase enzyme activity using luciferase as a model system.
Download or read book Thin Film Solar Cells written by Jef Poortmans and published by John Wiley & Sons. This book was released on 2006-10-16 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin-film solar cells are either emerging or about to emerge from the research laboratory to become commercially available devices finding practical various applications. Currently no textbook outlining the basic theoretical background, methods of fabrication and applications currently exist. Thus, this book aims to present for the first time an in-depth overview of this topic covering a broad range of thin-film solar cell technologies including both organic and inorganic materials, presented in a systematic fashion, by the scientific leaders in the respective domains. It covers a broad range of related topics, from physical principles to design, fabrication, characterization, and applications of novel photovoltaic devices.
Download or read book Green Chemistry and Engineering written by Mukesh Doble and published by Academic Press. This book was released on 2010-07-27 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical processes provide a diverse array of valuable products and materials used in applications ranging from health care to transportation and food processing. Yet these same chemical processes that provide products and materials essential to modern economies, also generate substantial quantities of wastes and emissions. Green Chemistry is the utilization of a set of principles that reduces or eliminate the use or generation of hazardous substances in design. Due to extravagant costs needed to managing these wastes, tens of billions of dollars a year, there is a need to propose a way to create less waste. Emission and treatment standards continue to become more stringent, which causes these costs to continue to escalate. Green Chemistry and Engineering describes both the science (theory) and engineering (application) principles of Green Chemistry that lead to the generation of less waste. It explores the use of milder manufacturing conditions resulting from the use of smarter organic synthetic techniques and the maintenance of atom efficiency that can temper the effects of chemical processes. By implementing these techniques means less waste, which will save industry millions of dollars over time. - Chemical processes that provide products and materials essential to modern economies generate substantial quantities of wastes and emissions, this new book describes both the science (theory) and engineering (application) principles of Green Chemistry that lead to the generation of less waste - This book contains expert advise from scientists around the world, encompassing developments in the field since 2000 - Aids manufacturers, scientists, managers, and engineers on how to implement ongoing changes in a vast developing field that is important to the environment and our lives
