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*Solar PV Conversion Efficiency, | *Solar PV Conversion Efficiency, | ||
*Plasmonics in Photovoltaics, | *Plasmonics & Metamaterials in Photovoltaics, | ||
* | *Transparent Conducting Oxides (TCO (ITO, ZnO, AZO))growth techniques & characterization | ||
*PV Systems Design and Optimization | *PV Systems Design and Optimization | ||
*3D Printing | *3D Printing | ||
*Snow effect on PV systems project, http://www.mtukrc.org/weather.htm | *Snow effect on PV systems project, http://www.mtukrc.org/weather.htm | ||
===Major Processes/Activities & Tools used=== | |||
*e-beam deposition- Federick system | |||
*Sputter deposition- Kurt J. Lesker Co (R301/MC2),Kurt J. Lesker Co utility sputter(ATX-600/RFX-600), Perkins-Elmer 2400 series | |||
*PECVD cluster tool deposition for a-Si:H. - MVSystems.Inc | |||
*Thin film characterization | |||
- 4 Point Probe measurements:- Lucas Lab Pro 4, MTU open-source system | |||
- Thickness measurements:- Veeco Dektak 150 profilometer, | |||
- Ellipsometry characterization:- M2000 FI-ESM-200AXY SE, M2000 DI SE, VU-302 VUV VASE, VB-250 VASE, IR VASE | |||
- | |||
==Publications== | ==Publications== | ||
Revision as of 21:07, 25 July 2014
Jephias Gwamuri
| Jephias Gwamuri |
|---|
 |
Bio
I am a doctoral student in the Material Science and Engineering at Michigan Tech. My Ph.D. research is aimed at exploiting plasmonics and photonics to design and fabricate plasmonic - metamaterial based solar cells. The project aims to explore the extent to which it possible to manage solar radiation efficiently using plasmonic metamaterial perfect absorbers integrated in hydrogenated amorphous silicon (a-Si:H)-based solar photovoltaic devices. This knowledge will contribute to increasing the efficiency and lowering the cost of production of solar cells. The project also include aspects of Solar PV devices fabrication, designing of open source ellipsometer and four point probe stations as well as off-grid and grid connected PV system designing and optimization.
I have been a member of Professor Joshua Pearce's Michigan Tech's Open Sustainability Technology [MOST] Research Group since August 2012. My specialties include thin film characterization using Variable Angle Spectroscopy Ellipsometry (WVASE32 and completeEASY), Four Point Probe (4PP)systems, Scanning Electron Microscopy (FESEM/SEM)and Profilometer techniques. My current skills also include thin film growth techniques using PECVD, PVD ( e-beam evaporation and sputter deposition systems), semiconductor/micro-fabrication processing and clean room techniques.
I am currently working on mastering other fabrication and characterization techniques such as 3D printing, Focused Ion Beam, FIB and Transmission Electron Microscopy, TEM.
Research
Template:Userboxtop Template:User MOST Template:User photovoltaic Template:Userboxbottom
Research Interests:
- Solar PV Conversion Efficiency,
- Plasmonics & Metamaterials in Photovoltaics,
- Transparent Conducting Oxides (TCO (ITO, ZnO, AZO))growth techniques & characterization
- PV Systems Design and Optimization
- 3D Printing
- Snow effect on PV systems project, http://www.mtukrc.org/weather.htm
Major Processes/Activities & Tools used
- e-beam deposition- Federick system
- Sputter deposition- Kurt J. Lesker Co (R301/MC2),Kurt J. Lesker Co utility sputter(ATX-600/RFX-600), Perkins-Elmer 2400 series
- PECVD cluster tool deposition for a-Si:H. - MVSystems.Inc
- Thin film characterization
- 4 Point Probe measurements:- Lucas Lab Pro 4, MTU open-source system - Thickness measurements:- Veeco Dektak 150 profilometer, - Ellipsometry characterization:- M2000 FI-ESM-200AXY SE, M2000 DI SE, VU-302 VUV VASE, VB-250 VASE, IR VASE -
Publications
Book Chapters
- Solar Cell nanotechnology. Chapter 10: Advances in Plasmonic Light Trapping in Thin-Film Solar Photovoltaic Devices. http://www.wiley.com/WileyCDA/WileyTitle/productCd-111868625X,subjectCd-NT10.html
Journal articles
Exchanging Ohmic Losses in Metamaterial Absorbers with Useful Optical Absorption for Photovoltaics. http://www.nature.com/srep/2014/140509/srep04901/full/srep04901.html
Conference Proceedings
- DESIGN OF PV SOLAR HOME SYSTEM FOR USE IN URBAN ZIMBABWE (Nov. 2010). http://www.appropriatetech.net/?q=content/icat-4-energy-paper-titles.
- The Viability of Nanotechnology-based InGaN Solar Photovoltaic Devices for Sustainable Energy Generation. http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9030478
Additional pages to manage:
- Spectrometric Ellipsometry Protocol Ellipsometry protocol: MOST
- Literature review Plasmonic Perfect Meta-Absobers for a-Si PV Devices
- Focused Ion Beam Protocol Focussed_Ion_beam_(FIB)_protocol: MOST
- E-beam deposition Protocol E-beam_Deposition_protocol:_MOST
- Four Point Resistivity and Conductivity Type Measurements_protocol:_MOST
- Perkin-Elmer RF Sputtering System-6 Inch_protocol:_MOST
