Characterization of Large Area Cadmium Telluride Films and Solar Cells Deposited on Moving Substrates by Close Spaced Sublimation PDF Download
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Author: Vishwanath Kumar
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
ABSTRACT: Films deposited under various conditions were studied to improve our understanding of the influence of processing conditions on device performance. The key advantage of this technique over others is its high deposition rate, simplicity of operation and high conversion efficiency. Typical deposition times were two minutes and could be reduced to as low as 45 sec with little variation in performance. The four major parameters that influence the films prepared by close spaced sublimation, namely substrate temperature, source temperature, ambient pressure, and spacing were optimized for best device performance. The influence of each parameter on deposition rate and cell efficiency was also studied. The best cells produced by this technology had an efficiency of 13% with Voc=830 mV, FF= 74% and Jsc=21.1 mA/cm2.
Author: Vishwanath Kumar
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
ABSTRACT: Films deposited under various conditions were studied to improve our understanding of the influence of processing conditions on device performance. The key advantage of this technique over others is its high deposition rate, simplicity of operation and high conversion efficiency. Typical deposition times were two minutes and could be reduced to as low as 45 sec with little variation in performance. The four major parameters that influence the films prepared by close spaced sublimation, namely substrate temperature, source temperature, ambient pressure, and spacing were optimized for best device performance. The influence of each parameter on deposition rate and cell efficiency was also studied. The best cells produced by this technology had an efficiency of 13% with Voc=830 mV, FF= 74% and Jsc=21.1 mA/cm2.
Author: Nikolay Nikitenkov
Publisher: BoD – Books on Demand
ISBN: 953513003X
Category : Science
Languages : en
Pages : 446
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Book Description
Development of the thin film and coating technologies (TFCT) made possible the technological revolution in electronics and through it the revolution in IT and communications in the end of the twentieth century. Now, TFCT penetrated in many sectors of human life and industry: biology and medicine; nuclear, fusion, and hydrogen energy; protection against corrosion and hydrogen embrittlement; jet engine; space materials science; and many others. Currently, TFCT along with nanotechnologies is the most promising for the development of almost all industries. The 20 chapters of this book present the achievements of thin-film technology in many areas mentioned above but more than any other in medicine and biology and energy saving and energy efficiency.
Author: Nowshad Amin
Publisher:
ISBN:
Category : Science
Languages : en
Pages :
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Book Description
Semiconductors are the key materials in many of our modern day devices, such as sensors, integrated circuits, energy harvesting devices, optoelectronics and so on. However, apart from two known elemental semiconductors that are silicon and germanium, we have been using many of the synthesized ones since the microelectronic revolution known as invention of transistor. Numerous compound semiconductors since then have been synthesized, grown, deposited or simply fabricated by numerous processes in the scientific community. To avoid associated chemical disposals or keep safe from toxic or combustible gas usages in any semiconductor fabrication facilities, many researchers choose physical vapor deposition as the simplest method. One of such processes is called Close-Spaced Sublimation (CSS), which is a kind of thermal evaporation by nature. This chapter would give a comprehensive outline on CSS as one of the most advantageous semiconductor deposition processes for many compound semiconductors having relatively low evaporation temperature. Cadmium telluride (CdTe) is one of the examples utilized for solar cell absorber materials since the early 1980s using CSS technique. Therefore, growth of CdTe thin films by CSS and its utilization in thin film solar cells will be discussed to comprehend the ultimate benefits of the close-spaced sublimation (CSS) process.
Author: Ting L. Chu
Publisher:
ISBN:
Category : Cadmium telluride
Languages : en
Pages : 0
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Book Description
This report on thin-film cadmium telluride and zinc phosphide solar cells describes work on the deposition of CdTe films by direct combination of Cd and Te vapor on foreign substrates, with emphasis on the resistivity control of p-type films and on the reduction of p-CdTe/substrate interface resistance. CdTe films deposited on graphite substrates were all p-type, regardless of substrate temperature or reactant composition. Deposition and characterization of window materials also continued. Thin-film CdTe heterojunction solar cells were also prepared and characterized. The best CdS/CdTe cells in this work have had an AM1 efficiency of about 6.5% and the best ITO/CdTe cell to date has had an AM1 efficiency of about 8%.
Author:
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 1860
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Book Description
Author: Ashish Seth
Publisher:
ISBN:
Category : Cadmium alloys
Languages : en
Pages : 250
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Book Description
Author: Jaime Andres Perez Taborda
Publisher: BoD – Books on Demand
ISBN: 1789848709
Category : Technology & Engineering
Languages : en
Pages : 288
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Book Description
The field of coatings and thin-film technologies is rapidly advancing to keep up with new uses for semiconductor, optical, tribological, thermoelectric, solar, security, and smart sensing applications, among others. In this sense, thin-film coatings and structures are increasingly sophisticated with more specific properties, new geometries, large areas, the use of heterogeneous materials and flexible and rigid coating substrates to produce thin-film structures with improved performance and properties in response to new challenges that the industry presents. This book aims to provide the reader with a complete overview of the current state of applications and developments in thin-film technology, discussing applications, health and safety in thin films, and presenting reviews and experimental results of recognized experts in the area of coatings and thin-film technologies.
Author: Sam Zhang
Publisher: CRC Press
ISBN: 1420093940
Category : Technology & Engineering
Languages : en
Pages : 256
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Book Description
Authored by leading experts from around the world, the three-volume Handbook of Nanostructured Thin Films and Coatings gives scientific researchers and product engineers a resource as dynamic and flexible as the field itself. The first two volumes cover the latest research and application of the mechanical and functional properties of thin films an
Author: Ting L. Chu
Publisher:
ISBN:
Category : Cadmium telluride
Languages : en
Pages : 41
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Book Description
This report on thin-film cadmium telluride and zinc phosphide solar cells describes work on the deposition of CdTe films by direct combination of Cd and Te vapor on foreign substrates, with emphasis on the resistivity control of p-type films and on the reduction of p-CdTe/substrate interface resistance. CdTe films deposited on graphite substrates were all p-type, regardless of substrate temperature or reactant composition. Deposition and characterization of window materials also continued. Thin-film CdTe heterojunction solar cells were also prepared and characterized. The best CdS/CdTe cells in this work have had an AM1 efficiency of about 6.5% and the best ITO/CdTe cell to date has had an AM1 efficiency of about 8%.
Author: Guogen Liu
Publisher:
ISBN:
Category :
Languages : en
Pages : 105
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Book Description
Cadmium telluride is the only thin film photovoltaic (PV) technology to surpass crystalline silicon PV in the cost. The most common CdTe solar cells consist of a simple p-n heterojunction structure containing a p-doped CdTe layer and n-doped cadmium sulfide (CdS) layer, which acts as a window layer. Cadmium Sulfide (CdS) thin films are often deposited on glass substrates coated with TCO layers by the close-spaced sublimation (CSS) or sputter techniques in industrial because of in-line production integration. It is seldom reported that CdS is deposited by the chemical bath deposition (CBD) batch process. The bottleneck of CBD for commercial application is its low production rate and waste water treatment. This dissertation reports how to produce different thickness large area (100cm2) CdS thin film by CBD. The influence of the solution temperature and concentration on the thickness of CdS is investigated. This dissertation also reports a growth model for CdTe deposition including diffusion limited and sublimation limited. The model was consistent with experimental observations and showed very good agreement over a range of operating conditions.
