Back Contact Effects on the Electro-Optical Properties of CdTe/CdS Solar Cells

Back Contact Effects on the Electro-Optical Properties of CdTe/CdS Solar Cells

Date: October 15, 1998
Creator: Levi, D. H.; Albin, D. S.; Gessert, T. A. (National Renewable Energy Laboratory) & Woods, L. M. (Department of Electrical Engineering, Colorado State University, Ft. Collins, CO)
Description: Studies of junction photoluminescence (PL) in CdTe/CdS solar cells reveal that back-contact application produces a dramatic qualitative change in the junction picosecond-PL spectrum. Prior to contact application, the spectrum has two peaks at energies of 1.501 eV and 1.457 eV, corresponding to recombination in regions of CdTeS alloy with 2% and 12% sulfur content, respectively. After contact application, the spectrum consists of a single broad peak at 1.48 eV. Previous studies have shown that the nitric-phosphoric (NP) etch used in the contact procedure produces a layer of elemental tellurium (Te) on the CdTe surface. We postulate that the change in the near-junction PL spectrum is caused by a grain-boundary field effect due to perturbations of the grain-boundary conductivity and Fermi level.
Contributing Partner: UNT Libraries Government Documents Department
Advanced Processing of CdTe- and CuInxGa1-xSe2-Based Solar Cells: Final Report: 18 April 1995 - 31 May 1998

Advanced Processing of CdTe- and CuInxGa1-xSe2-Based Solar Cells: Final Report: 18 April 1995 - 31 May 1998

Date: January 13, 1999
Creator: Morel, D. L.; Ferekides, C. S.; Bhatt, R.; Jayapalan, A.; Komin, V.; Lin, H. et al.
Description: This report summarizes work performed by the University of South Florida Department of Electrical Engineering under this subcontract. The Cadmium telluride(CdTe) portion of this project deals with the development of high-efficiency thin-filmed CdTe solar cells using fabrication techniques that are suitable for manufacturing environments.
Contributing Partner: UNT Libraries Government Documents Department
Framework for Design Validation of Security Architectures

Framework for Design Validation of Security Architectures

Date: November 17, 2008
Creator: Dwoskin, Jeffrey Scott, 1980-; Gomathisankaran, Mahadevan & Lee, Ruby Bei-Loh
Description: This technical report discusses a framework for design validation of security architectures.
Contributing Partner: UNT College of Engineering
Applications of wireless sensors in monitoring Indoor Air Quality in the classroom environment [Poster]

Applications of wireless sensors in monitoring Indoor Air Quality in the classroom environment [Poster]

Date: 2012
Creator: Chamberlain, Blaine; Jordan, Georgette; Li, Xinrong; Thompson, Ruthanne; Borkar, Chirag & Mansour, Sahar
Description: This poster discusses applications of wireless sensors in monitoring indoor air quality in the classroom environment. The focus of this research project was to investigate Indoor Air Quality monitoring technologies, government regulations and policies, and best practices to improve IAQ.
Contributing Partner: UNT College of Engineering
Executive Correspondence – Letter received 08/08/05 by the BRAC Commission from Princeton University Professor of Electrical Engineering Daniel C. Tsui

Executive Correspondence – Letter received 08/08/05 by the BRAC Commission from Princeton University Professor of Electrical Engineering Daniel C. Tsui

Date: August 11, 2005
Creator: unknown
Description: Executive Correspondence – Letter received 08/08/05 by the BRAC Commission from Princeton University Professor of Electrical Engineering Daniel C. Tsui criticizing DoD’s recommendation to move the Army Research Office (ARO) from North Carolina to Bethesda, MD and explaining how such a move would severely compromise ARO’s ability to provide revolutionary advances to the Army.
Contributing Partner: UNT Libraries Government Documents Department
Bringing real world applications for wireless sensor networks into the classroom: Telemetric monitoring of water quality in an artificial stream [2012: Poster]

Bringing real world applications for wireless sensor networks into the classroom: Telemetric monitoring of water quality in an artificial stream [2012: Poster]

Date: 2012
Creator: Bunn, Zac; Guerrero, Jose; Wolf, Lori; Fu, Shengli; Hoeinghaus, David; Driver, Luke et al.
Description: This poster discusses research on bringing real world applications for wireless sensor networks into the classroom and covers the use of a wireless sensor network (WSN) using the ZigBee protocol to remotely monitor an artificial aquatic ecosystem.
Contributing Partner: UNT College of Engineering
Demand Controlled Ventilation using CO2 Sensors in a Wireless Sensor Network [Poster]

Demand Controlled Ventilation using CO2 Sensors in a Wireless Sensor Network [Poster]

Date: 2013
Creator: Parsons, David; Jordan, Georgette; Li, Xinrong; Thompson, Ruthanne & Abraham, Sherin
Description: Poster presented as part of the 2013 Research Experiences for Teachers (RET) in Sensor Education, a National Science Foundation (NSF) funded grant project. This poster discusses research on demand controlled ventilation using CO₂ sensors in a wireless sensor network.
Contributing Partner: UNT College of Engineering
Low cost, compact, and high efficiency traction motor for electric and hybrid electric vehicles

Low cost, compact, and high efficiency traction motor for electric and hybrid electric vehicles

Date: October 7, 2002
Creator: Ehsani, Mark
Description: A new motor drive, the switched reluctance motor drive, has been developed for hybrid-electric vehicles. The motor drive has been designed, built and tested in the test bed at a near vehicle scale. It has been shown that the switched reluctance motor drive is more suitable for traction application than any other motor drive.
Contributing Partner: UNT Libraries Government Documents Department
The Use of Thyristors for Repetitive Narrow Pulse, High Power Switching

The Use of Thyristors for Repetitive Narrow Pulse, High Power Switching

Date: January 13, 2000
Creator: BAYNE,S.B.; PORTNOY,W.M. & ROHWEIN,G.J.
Description: Inverter type thyristors were switched repetitively to failure with 1 {micro}s pulses at repetition rates of 10, 50 and 100 pps and at peak currents up to 12 kA. Millions of pulses could be obtained before failure if the peak current were held at around 6 kA.
Contributing Partner: UNT Libraries Government Documents Department
Autonomous Robot Localization Using WiFi Fingerprinting

Autonomous Robot Localization Using WiFi Fingerprinting

Date: April 14, 2011
Creator: Bunkley, Terrence; Wright, Alex & Namuduri, Kamesh
Description: This paper discusses autonomous robot localization using WiFi fingerprinting.
Contributing Partner: UNT Honors College
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