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PeopleFaculty and StaffDr. Walajabad S. SampathProfessor, Department of Mechanical EngineeringSite director – NSF I/UCRC for Center Next Generation PhotovoltaicsEducation: B. Tech. 1980, Indian Institute of Technology – Mechanical EngineeringM. Engr. 1982, Arizona State University – Mechanical EngineeringPh.D. 1985, Arizona State University – Mechanical Engineering Research Interest: Kurt BarthAssociate Director Colorado State University - Next Generation PV CenterEducation: M.S. Colorado State UniversityResearch Interest: Kevan C. CameronResearch Associate/Lab ManagerEducation: US Navy Tech School including:Radioman “A” SchoolEnlisted Basic Submarine SchoolTeletype Maintanance & Repair SchoolSatalline Communication (SATCOM) SchoolSubmarine Damage Control SchoolFirefighting SchoolAims Community College General Aviation Pilot Ground SchoolRed Rocks Community College – B.S. in Business Administration with Double Major in Management, University of Pheonix.Research Interest: 30 years’ experience in vacuum technology and process including: Flight hardware Space Simulation Testing, Thin Film Lithium Battery R&D as well as RF, AC and DC power supply testing. Current interest mostly towards development in the field of alternate energy. Jennifer DraytonCurrent Graduate Students:Jason KepartEducation: B.S., Mechanical Engineering and Business Economics & Management, California Institute of TechnologyM.S., Mechanical Engineering, Colorado State UniversityPhD Dissertation topic: My research focuses on optimizing the electronic and optical properties of the front contact of the solar cell as well as minimizing optical absorption in the substrate.Drew SwansonAmit MunshiEducation: Associate Degree, Automobile Engineering – Gujarat Technical Education Board, India B.S. Automobile Engineering – Sardar Patel University, India M.S. Mechanical Engineering – Colorado State UniversityMS thesis topic: Investigation of Gold as Material for Thermal Radiation Shielding Current research subject: Development of better understanding of CdTe and CdMgTe thin film microstructure for photovoltaic applications. Currently the effects of process conditions on CdTe and CdMgTe thin films microstructure is not very well understood. My goal is to investigate and document effect of process conditions on film microstructure as well as define is effect of CdTe thin film photovoltaic device performance. For this purpose various tools including but not limited to SEM, TEM, EDS, XPS, XRD, FIB, EBSD, etc. are actively and proficiently used. PhD Dissertation topic: Investigating microstructure of CdMgTe as an electron reflector in CdTe thin film photovoltaic devices. Tushar ShimpiEducation: B.E. Mechanical Engineering, University of MumbaiMS Mechanical Engineering, Colorado State UniversityMS thesis topic:?Effect of Hail Impact on Thermally Tempered Glass Substrates Used for Processing CdTe PV ModulesCurrent research subject: Current working on Sputter Deposition of Cadmium Zinc Telluride Films.?Cadmium Zinc Telluride (CZT) is a high band gap material. It has a potential for a top cell in a multi junction solar cell and also holds a promise to form an electron reflector when deposited on the back of CdTe devices.?My focus is to carry out deposition of CZT films by RF sputtering on various devices structures. The structures are then characterized by using different tools and the performance is tested under standard conditions.Aanand Thiyagarajan Anthony P. NicholsonEducation: B.S. Mechanical Engineering, Colorado State UniversityCurrent Research: Analyzing the close-space sublimationporcess for CdS and CdTe using computational fluid dynamics via ANSYS Fluent. The project’s current focus is on investigating and qualtifying the sticking coefficient of CdS and CdTe as a function of time, temperature and pressure. A deeper understanding on thin-fil growth by modeling CdS and CdTe deposition processes will lead to improved film uniformity and device efficiency while reducing cost in manufacturing.Venkat Anirudh Karteek Gummadala (Karteek GVA)Education: B.E. Mechanical Engineering from Osmania University, Telangana, India.Current Research: My research is based on the calculation of Emissivity of Graphite (G330 purified to <5ppm) when it is coated with the vapors of Cadmium Sulphide (CdS) and Cadmium Telluride (CdTe ) in the wavelength range of 2-10 microns and in the thickness range of 1-10 microns. Trying to check for the thermal changes (Emissivity vs. Thickness) that takes place when coatings (both thin and thick) are deposited on the Graphite using the Advanced Research Deposition System (ARDS) in the Photovoltaic Manufacturing Laboratory.M.S. Thesis Topic: Study of the behavior of emissivity of graphite substrates inside the production machine when it is coated with the CdS and CdTe film vapors. Recent Graduates:Pavel (Paul) S. Kobyakov?Education: B.S. Mechanical Engineering Syracuse University M.S. Mechanical Engineering Colorado State University PhD. Mechanical Engineering Colorado State University MS thesis topic: Microstructural characterization of CdTe/CdS solar cells.?PhD dissertation topic: Development of Cd1-xMgxTe thin films for application as an electron reflector in CdS/CdTe solar cells.?Research summary: Developed a novel co-sublimation process to deposit the ternary alloy Cd1-xMgxTe (CMT) thin films. The higher band gap CMT films were then used as an electron reflector at the rear of the CdS/CdTe device to reduce back-surface recombination and thus improve performance of the device.?Current status: Development Engineer at Avago Technologies in Fort Collins, COKeegan Corey BarricklowEducation: B.S. Mechanical Engineering, Colorado State University M.S. Mechanical Engineering, Colorado State UniversityMS Thesis: Advanced Research Deposition System (ARDS) for processing CdTe Solar Cells.Research Summary: While studying at CSU my interests were in manufacturing and renewable energies. Primarily for developing manufacturing techniques and systems for next generation thin film Photovoltaic structures and applying advanced characterization methods to develop process to performance correlations. While completing my MSME, ?Current Status: I worked as an R&D Engineer with Abound Solar to develop the process and equipment necessary for high throughput volume manufacturing. I am currently an Instructor for Introduction to Manufacturing in the Department of Mechanical Engineering at Colorado State University.Mohammed TashkandiDavis HemenwayEducation: ?B.S. + M.S. Mechanical Engineering - Colorado State UniversityMS thesis topic: ?"Computational modeling of cadmium sulfide deposition in the CdS/CdTe solar cell manufacturing process"Research summary:??In 2011, Davis R. Hemenway began work on monumental task of revolutionizing the photovoltaic manufacturing paradigm through the use of well-defined Computational Fluid Dynamics research tools. The vision was to understand and optimize solar cell manufacturing for efficiency and reproducible quality. In the past years, Mr. Hemenway has investigated and eliminated obstacles to the mass production of thin-film Photovoltaics. His accomplishments include: A comprehensive sublimation, fluid transport, and film growth model of Cadmium Sulphide on TCO coated glass substrates in the Close-Space Sublimation processUsing predictive film growth models to increase film uniformity A method for modeling the thermal response of finished PV modules in varying wind and solar conditions."?Current status: ?Staff Engineer - Direct SolarKevin WaltersM.S. Mechanical Engineering, Colorado State University M.S. Research: Computational Fluid Dynamics (CFD) Modeling for CdTe Solar Cell Manufacturing Analysis of the thermal uniformity of CdTe solar cell manufacturing equipment. Current Status: I have been working for thin film coating and aerospace industries.Tejas KhetaniMS Mechanical Engineer (Materials)?Thesis: Analysis of advanced vapor source for Cadmium Telluride solar cell manufacturing. Current Status: Mechanical Design and Test Engineer (GE Healthcare)? Undergraduate Staff:Christina Moffett3rd Year, B.S. Mechanical EngineeringResponsibilities: Finishing cells (painting, blasting, JV testing), SolidWorks and occasionally running process on the ARDSAcademic Goals: I hope to finish both my bachelors and masters in Mechanical Engineering at CSU. I would like to continue working in the alternative energy field as I continue on in my engineering career.?James MorganteSenior, B.S. Mechanical Engineering Responsibilities: Including but not limited to fabrication and machining, CAD, process tool maintenance and operation, cell finishing, cell finishing equipment maintenance, cell characterization, and general lab maintenance.Zakary GreathouseSenior, B.S. Mechanical Engineering/Concurrently pursuing M.S. Mechanical Engineering Responsibilities - Zakary is currently finishing his B.S. in Mechanical Engineering at Colorado State University. He also is working towards a M.S. Degree concurrently. For his research curriculum as part of Research Experience for Undergraduate (REU) program he is presently working on designing the dispersion head for the Metal Organic Chemical Deposition process to be implemented into the Colorado State University’s Next Generation Photovoltaics Center. ?Marina D'Ambrosio3rd Year, B.S. Mechanical Engineering Responsibilities - Finishing cells (painting, blasting, soldering Indium circles, JV testing), run process on ARDS, and hazardous waste management. I plan on getting my bachelors from CSU in Mechanical Engineering.? I am also part of Formula Society of Automotive Engineers (FSAE) and I hope to work in the automotive industry helping design and engineer ECO friendly cars.Jimmie NoldB.S. Senior Mechanical EngineeringResponsibilities: Small area measurement tool, blasting, indium contacts etc.Academic Goals: Future research interests in advanced materials and high temperature applications. ................
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