Download or read book Some Optical and Electrical Properties of Chemically Deposited Lead Sulfide Films written by Paul A. McCormack and published by . This book was released on 1994 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Some Optical and Electrical Properties of Cadmium Sulfide and Lead Sulfide Then Films Prepared by Electron Beam Deposition written by Achiri Celestine Tange and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical and Optical Properties Of Lead Selenide Thin Films By Chemical Bath Deposition written by Dr. Dhananjay Narayan Gujarathi and published by Lulu.com. This book was released on with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical and optical characterization of CdxZn1 xS and PbS thin films for photovoltaic applications written by Cliff Orori Mosiori and published by GRIN Verlag. This book was released on 2014-08-12 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2011 in the subject Physics - Applied physics, grade: A, Kenyatta University, course: Master of Science ( Physics), language: English, abstract: In this research an n-type CdxZn1-xS and p-type PbS thin films were optimised for solar cell applications employing chemical bath deposition technique. The thin films were prepared using thiourea and nitrates of cadmium, zinc and lead. Deposition of optimised CdxZn1-xS was done by CBD at 820 C and in alkaline conditions while that of PbS was done at room temperature and both films at normal atmospheric pressure utilizing aqueous conditions. This study concentrated on optimising optical and electrical characterization of the films. Optical constant suitable for photovoltaic applications were sort for and for this purpose a UV VIS IR spectrophotometer 3700 DUV was utilised while the electrical properties were investigated using a four point probe connected to a Keithley 2400 source meter interfaced with computer. The optical band gap of the as deposited CdxZn1-xS films varied from 2.47eV (x =0.6) to 2.72 eV (x =1.0), and transmittance above 79% in the VIS - NIR region for the concentration range of x = 0.6 to 1.0, that is, the band gap increased with increasing Zn concentration of the alloy and Cd06Zn0.4S sample showed the widest band gap. It was obtained that the presence of zinc increased optical band gap. The average extinction coefficients for the as deposited CdxZn1-xS samples were very low revealing that they absorb very little radiation hence a good window layer material. As measured by the four point probe connected to a Keithley 2400 source meter, electrical resistivity increased with increase in Zn in the bath in CdxZn1-xS and a resistivity range of 9.5×101 – 1.22× 102 Ω-cm was obtained. These properties are appropriate for window layers used for photovoltaic cell applications. PbS thin films had a band gap of 0.89 eV and a transmittance of below 55% appropriate for absorber layers of photovoltaic cells and a resistivity range of 6.78 × 103 to 1.26 × 104 Ω-cm. The fabricated photovoltaic cell had a short circuit current, Isc = 0.031 A, open voltage, Voc = 0.37V, efficiency, η = 0.9% and a fill factor, FF = 0.66 implying that the two materials are appropriate for photovoltaic applications especially in the VIS and IR light spectrum.

Download or read book Characterization Electrical and Optical Properties of Chemically Deposited Thin Films of Some Metal Selenides written by Cesar Antonio Estrada-Mendizabal and published by . This book was released on 1994 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thin Film Techniques and Applications written by and published by Allied Publishers. This book was released on 2004 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inorganic Ternary Thin Films Anaysis of Optical Properties written by Cliff Orori Mosiori and published by Anchor Academic Publishing (aap_verlag). This book was released on 2015 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin films can be used to fabricate optoelectronic devices. Technology is currently focusing on ternary thin film composition because of their structure, inter-band transitions and other optical properties that can be maximized. This book discusses in detail the optical characteristics of ternary thin films and further investigates the behavior of Iron Zinc Sulphide, Lead Silver Sulphide, Copper Silver Sulphide, Copper Zinc Sulphide and Cadmium Zinc Sulphide. Thin films are of fundamental importance in modern technology.

Download or read book Characterization of Electrical and Optical Properties of Chemically deposited Copper Selenide Thin Films written by Al-Mamun and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Morphology Evolution and Physical Properties of Chemically Deposited Lead Sulfide Thin Films written by Anna Osherov and published by . This book was released on 2011 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Nanomaterials and Their Applications written by N. Madhusudhana Rao and published by Springer Nature. This book was released on 2023-05-12 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises select proceedings of the International Conference on Advanced Nanomaterials and Applications (ICANA 2022) and presents recent developments in the fields of nanoscale sciences. The topics covered in this book include energy storage and conversion, bio- and healthcare materials, sensors and actuators, functional materials, optical materials, and computational and simulation methods. This book is useful for researchers and professionals working in the various fields of nanotechnology.

Download or read book Photoconductive Behavior of Lead Sulfide Films Volume 2 Appendix IV Photoconductivity in Chemically Deposited Lead Sulfide Layers written by Svein Espevik and published by . This book was released on 1971 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although chemically-deposited PbS layers have been extensively studied over the last twenty-five years, the mechanism of the photoconductivity process in such layers has not been previously understood in any reliable or complete manner. Investigation of the temperature dependence of the electrical conductivity, photoconductivity, Hall coefficient, photo-Hall effect, and thermoelectric power in such layers has been used to answer many of the common questions. Three types of layers have been investigated: (1) without added chemical oxidant in the deposition bath; (2) with a standard proportion of oxidant added; and (3) with four times the standard proportion of oxidant added. Electron microscope studies show that the layers consist of grains and intergranular regions. The author predicts on the basis of this work, that it should be possible in principle to prepare highly photosensitive PbS single crystal detectors.

Download or read book Photoconductive Behavior of Lead Sulfide Films written by Donald K. Smith and published by . This book was released on 1971 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The structure, chemical composition, and photoelectronic properties of chemically deposited PbS films have been investigated in relationship to variation in the concentration of oxidant used in the deposition. Structure and photoelectronic properties in the PbS film change as the concentration of oxidant is varied. Concomitant variations in the average chemical composition of the films are minor. It was found that the dependence of carrier density and mobility on temperature is divided into low and high temperature regions with distinct activation energies. The principal effect of photoexcitation is to increase the carrier density. Films produced without the use of oxidants are relatively insensitive. The primary electronic properties of PbS films may be described in terms of sensitizing centers located 0.23 eV below the conduction band, and in terms of intergrain barriers which limit the effective mobility. The intergrain barriers play no essential role in the photoconductive process. PbS films deposited from baths containing no oxidant lack the sensitizing centers.

Download or read book Characterization of CdxZn1 xS and PbS Thin Films for Photovoltaics written by Cliff Orori Mosiori and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of CdZnS and PbS nano-crystalline thin films deposited by chemical bath deposition (CBD) method has been made using Four point probe for electrical sheet resistivity, UV-Vis spectroscopy and solar simulator for optical and Photovoltaic cell properties respectively. Sheet resistivity for CdZnS thin films was found to decrease as the concentration of Zn increased while PbS thin films had their sheet resistivity increase with increase in bath concentrations. Optical band gap for CdZnS had a tunability depending on the various Zn2+ concentrations used successfully as demonstrated by UV-VIS-NIR spectroscopy. Transmittance in CdxZn1-xS was found to be above 80%, optical band gap of 2.47 - 2.72 eV, refractive index of 2.58 - 2.39, and sheet resistivity of 1.09 - 1.36 x 102 -cm for x = 1.0 - 0.6. The thin films were suitable for use as window films for optical devices. PbS films were good absorbers with a band gap of 0.88 eV and transmittance below 55%, Electrical resistivity varying from 6.78 x 103 to 1.26 x 104 -cm, conductivity of 1.09 x 10-4 to 7.9 x 10-5 S-cm-1. The PbS films were suitable as absorber films for photovoltaic cell applications.

Download or read book Optical and Electrical Properties of Vapor Deposited Thin Films of a Sodide and an Electride written by James Erik Hendrikson and published by . This book was released on 1994 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Solution Deposition of Semiconducting and Non metallic Films written by Daniel Lincot and published by The Electrochemical Society. This book was released on 2006 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thin Film Processes written by Jagannathan Thirumalai and published by BoD – Books on Demand. This book was released on 2017-04-12 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book Thin Film Processes - Artifacts on Surface Phenomena and Technological Facets presents topics on global advancements in theoretical and experimental facts, instrumentation and practical applications of thin-film material perspectives and its applications. The aspect of this book is associated with the thin-film physics, the methods of deposition, optimization parameters and its wide technological applications. This book is divided into three main sections: Thin Film Deposition Methods: A Synthesis Perspective; Optimization Parameters in the Thin Film Science and Application of Thin Films: A Synergistic Outlook. Collected chapters provide applicable knowledge for a wide range of readers: common men, students and researchers. It was constructed by experts in diverse fields of thin-film science and technology from over 15 research institutes across the globe.

Download or read book Chemical Solution Deposition Of Semiconductor Films written by Gary Hodes and published by CRC Press. This book was released on 2002-10-08 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discussing specific depositions of a wide range of semiconductors and properties of the resulting films, Chemical Solution Deposition of Semiconductor Films examines the processes involved and explains the effect of various process parameters on final film and film deposition outcomes through the use of detailed examples. Supplying experimental res