检索结果-内蒙古大学图书馆

2013 IEEE 39th Photovoltaic Specialists Conference (PVSC)

作者： Seth Shumate Hafeezuddin M. Khaja Douglas Hutchings Shui-Qing Yu Hameed Naseem Microelectronics-Photonics Program Silicon Solar Solutions Department of Electrical Engineering University of Arkansas Fayetteville AR United States

Top-down Aluminum Induced Crystallization (TAIC) has been used to form the p+ emitters of n-type solar cells. TAIC is a low temperature process with the potential for very good junction passivation and avoidance of parasitic absorption of amorphous silicon experienced by HIT cells. During experimentation, several crystallization possibilities emerged. The structure of these emitters were determined by Raman spectroscopy, SEM, and TEM. Solar cells were fabricated and measured. Theoretical projections and loss analyses were done by modeling these cells using PC1D. The highest efficiency cell achieved was 7.26% out of a theoretical 8.73%. These cells had no ARC/surface passivation, texturing, or a back surface field.

关键词： Crystallization Photovoltaic cells Aluminum Amorphous silicon Passivation Films Temperature measurement

来源：评论

学校读者我要写书评

暂无评论

Nanostructured PVP/SiO2 antireflective coating for solar panel applications

Nanostructured PVP/SiO2 antireflective coating for solar pan...

引用

IEEE Conference on Nanotechnology

作者： Corey S. Thompson Min Zou Microelectronics and Photonics Graduate Program at the University of Arkansas Fayetteville AR USA Department of Mechanical Engineering University of Arkansas Fayetteville AR USA

ISBN: (纸本)9781479906741

In this work, a nanostructured antireflective coating is created using a simple aqueous dip coating method. The addition of polyvinylpyrrolidone as an adhesion layer is shown to significantly impact the formation of nanostructures on the surface of the coating. The resulting variation in surface roughness creates a layer with a graded index of refraction. These films create an antireflective surface that increases the optical transmittance of glass substrates from 94.5% for silica nanoparticle films to 98.6% for PVP enhanced silica nanoparticle films at 500 nm wavelength.

关键词： Silicon compounds Films Surface topography Glass Coatings Surface treatment Optical surface waves

来源：评论

学校读者我要写书评

暂无评论

Amorphous silicon solar cells using metallic fishnet nanostructures simultaneously for Schottky contact and plasmonics enhancement

Amorphous silicon solar cells using metallic fishnet nanostr...

引用

39th IEEE Photovoltaic Specialists Conference, PVSC 2013

作者： Huang, Liang Deng, Huixu Pham, Thach Young, Matthew Naseem, Hameed Abu-Safe, Husam Hamza Yang, Xiaodong Yu, Shui-Qing Arkansas GREEN Research Center for Solar Cells Department of Electrical Engineering University of Arkansas Fayetteville AK 72701 United States Program of Microelectronics and Photonics University of Arkansas Fayetteville AK 72701 United States Department of Mechanical and Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 United States German-Jordanian University School of Natural Resources Engineering and Management Madaba Jordan

ISBN: (纸本)9781479932993

In this paper, an a-Si solar cell using metallic fishnet nanostructures simultaneously as Schottky contact and light trapping structures is presented. The photogenerated carrier could be collected more efficiently when the metal line spacing is engineered to be less than minority carrier diffusion length. Since no heavily doped regions are used in the device, the Shockley-Read-Hall recombination saturation current density could be two orders of magnitude lower than that of p-i-n a-Si solar cell, which will substantially reduce the device loss. The fishnet structure design is optimized through numerical simulation. Improved light absorption inside intrinsic a-Si layer is observed, especially at the wavelength of 632 nm. The detailed device fabrication results are presented. © 2013 IEEE.

关键词： Amorphous silicon

来源：评论

学校读者我要写书评

暂无评论

Safety considerations in building ultra-high vacuum plasma enhanced chemical vapor deposition system for low temperature group IV epitaxy

Safety considerations in building ultra-high vacuum plasma e...

引用

19th Biennial University/Government/Industry Micro-Nano Symposium, UGIM 2012

作者： Naseem, Hameed Yu, Shui-Qing El-Ghazaly, Samir Waqar, Zafar Abu-Safe, Husam Adcock, Shannen Conley, Ben Mosleh, Aboozar Hankton, Bryant Munasinghe, Asanka Department of Electrical Engineering University of Arkansas Fayetteville AR United States Microelectronics-Photonics Program University of Arkansas Fayetteville AR United States

ISBN: (纸本)9781457717499

A state-of-the-art chemical vapor deposition tool has been designed and built at the Photovoltaics Lab, Department of Electrical Engineering in the Engineering Research Center for depositing epitaxial films of group IV elements and their alloys. Due to the use of extremely toxic and flammable/pyrophoric gases safety and process integrity was built into the design right from the get go. College and University safety committees as well as external advisors were used throughout planning and building stages. Standard operating procedures (SOP) and travelers have been developed for various procedures and safety-training documents have been produced for proper training of new students and researchers. This lab is expected to be a model for new equipment building and acquisition at the University. © 2012 IEEE.

关键词： Temperature

来源：评论

学校读者我要写书评

暂无评论

Creation of an Entrepreneurial University Culture, The University of Arkansas as a Case Study*

引用

Journal of Engineering Education 2013年第4期90卷

作者： Ken Vickers Greg Salamo Otto Loewer John Ahlen Microelectronics-Photonics Graduate Program University of Arkansas Department of Physics University of Arkansas College of Engineering University of Arkansas Arkansas Science and Technology Authority

Many universities successfully accomplish their primary mission of teaching and/or research, and yet have not established or nurtured a tradition of new venture creation based on those teaching and research successes. This lack of entrepreneurial tradition (or culture) means not only that there are few local new venture firms to act as role models for potential entrepreneurs in the academic community, but also that many community members with exciting new concepts never even consider that their concepts could result in a commercialized product. In order to establish such a culture of new venture creation within a university, decisions must be made to either spend limited resources to nurture early “model ventures,” or to spend the resources to create an infrastructure that will nurture many new ventures. As a result of such decisions being made and implemented over the last decade at the University of Arkansas (in partnership with governmental and private entities), the University is on the edge of becoming a center of entrepreneurial activity in the state of Arkansas. This paper will discuss the decisions that have been implemented at the University of Arkansas as a case study in establishing an entrepreneurial culture at a land grant institution of higher education.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Nucleation-Step Study of Silicon Homoepitaxy for Low-Temperature Fabrication of Si Solar Cells

Nucleation-Step Study of Silicon Homoepitaxy for Low-Tempera...

引用

IEEE Photovoltaic Specialists Conference

作者： Aboozar Mosleh Seyed Amir Ghetmiri Benjamin R. Conley Husam Abu-Safe Zafar Waqar Mourad Benamara Shui-Qing Yu Hameed A. Naseem MicroElectronics-Photonics Program University of Arkansas German-Jordanian University School of Natural Resources Engineering and Management Electrical Engineering Department University of Arkansas Institute for Nano Science and Engineering University of Arkansas Arkansas GREEN Research Center for Solar Cells University of Arkansas

ISBN: (纸本)9781479933006

Smooth nucleation of silicon has been achieved as a critical step in epitaxial growth process using ultra high vacuum chemical vapor deposition system at 250℃. Proper conditions were achieved by studying the effect of key nucleation parameters such as plasma power, hydrogen dilution and deposition temperature. High-resolution transmission electron microscopy has been employed to study rough nucleation condition in order to achieve perfect nucleation step, which resulted in high quality epilayers.

关键词： Epitaxial layers Crystalline materials Silicon

来源：评论

学校读者我要写书评

暂无评论

Fabrication and characterization of c-si solar cells integrated with ordered metallic nanostructure arrays

Fabrication and characterization of c-si solar cells integra...

引用

2012 38th IEEE Photovoltaic Specialists Conference

作者： Liang Huang Husam Hamza Abu-Safe Matthew Young Seth Shumate Benjamin Newton Hameed Naseem Shui-Qing Yu Department of Electrical Engineering Microelectronics-Photonics Program University of Arkansas Fayetteville AR USA Department of Electrical Engineering University of Arkansas Fayetteville AR USA Natural science division Lebanese American University Lebanon Microelectronics-Photonics Program University of Arkansas Fayetteville AR USA

In this study we present the fabrication process and characterization techniques to integrate metallic nanostructures on the surface of crystalline Si (c-Si) solar cells. These structures are designed to enhance light trapping at particular wavelengths [2]. Tuning the wavelength to maximize the efficiency can be achieved by changing the sizes and shapes of these structures. A special design of these structures atop c-Si solar cell is expected to affect the absorption near the band gap. These structures have been fabricated by electron beam lithography on c-Si substrates. The processing integration and preliminary characterization results of metallic nanostructures on c-Si solar cells are reported.

关键词： Photovoltaic cells Absorption Plasmons Silicon Gold Nanowires

来源：评论

学校读者我要写书评

暂无评论

Safety Considerations in Building Ultra-High Vacuum Plasma Enhanced Chemical Vapor Deposition System for Low Temperature Group IV Epitaxy

Safety Considerations in Building Ultra-High Vacuum Plasma E...

引用

University/Government/Industry microelectronics Symposium

作者： Hameed Naseem Shui-Qing Yu Samir El-Ghazaly Zafar Waqar Ben Conley Aboozar Mosleh Bryant Hankton Asanka Munasinghe Husam Abu-Safe Shannen Adcock Department of Electrical Engineering University of Arkansas Fayetteville AR USA Microelectronics-Photonics Program University of Arkansas Fayetteville AR USA

关键词： Safety Educational institutions Buildings Vacuum systems Chemical vapor deposition Gases Plasmas

来源：评论

学校读者我要写书评

暂无评论

Extreme surface wetting for solar panel applications

Advancing Microelectronics

引用

Advancing microelectronics 2012年第6期39卷 12-15页

作者： Thompson, C.S. Fleming, R.A. Zou, M. Microelectronics and Photonics Program University of Arkansas Fayetteville AR 72701 United States Department of Mechanical Engineering University of Arkansas Fayetteville AR 72701 United States

Extreme wetting properties on glass and poly(ethylene terephthalate) (PET) surfaces have been achieved using scalable processes. Superhydrophilic surfaces are created by depositing a porous nanoparticle film on the substrate surface. The porosity of this film leads to enhanced optical transmittance of the substrates. When deposited on the glass, it also leads to self-cleaning and antifogging behavior. If used in the packaging of solar cells, this coating could increase overall efficiency of the device.

关键词： Glass

来源：评论

学校读者我要写书评

暂无评论

Fabrication of site specific amorphous/nanocrystalline silicon composite thin film for solar cells

Fabrication of site specific amorphous/nanocrystalline silic...

引用

2012 38th IEEE Photovoltaic Specialists Conference

作者： B. Newton H. Abu Safe M. Benemara S. Yu H. Naseem Microelectronics Photonics Program University of Arkansas Fayetteville Arkansas USA Department of Electrical Engineering University of Arkansas Fayetteville Fayetteville Arkansas USA Natural Science Division Lebanese American University Lebanon Institute of Nanoscale Material Science and Engineering University of Arkansas Fayetteville Arkansas USA

The absorption properties of amorphous silicon (α-Si) and the electron transport properties of nanocrystalline silicon are combined in a novel composite material for thin film silicon solar cells. In this work a composite film composed of α-Si with site specific areas of nanocrystalline material was created. Al was deposited through a SiO 2 template containing nanometer sized apertures with an approximate diameter of 250 nm onto an α-Si film supported by a ; crystalline silicon substrate. It was then annealed at 350°C. The annealing caused crystallization only at sites where the Al was in contact with the α-Si surface. The AIC created site specific three dimensional nanocrystalline structures embedded in a thin film of α-Si. After grain boundary passivation these nanocrystalline sites will provide pathways for charge carriers that are less defect dense than the α-Si film. TEM samples were fabricated from the composite film utilizing the focus ion beam. The growth characteristics of these 3D nanostructures and the α-Si thin film were characterized utilizing ESEM and the TEM.

关键词： Annealing USA Councils Substrates Platinum Measurement uncertainty Valves

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：