Douglas Ruby, Ph.D. - Consultant to the Photovoltaics Industry
Specializing in

  • PV cell and system design and performance modeling,
  • PV cell and module test procedures, measurement protocols and performance analysis,
  • PV cell and module fabrication process development.
  • Due diligence reviews of PV companies and proposals
  • On-site or webcast-based Short Course on PV Science, Technology, and Manufacturing
  • Expert Witness services for legal proceedings
 
  1. Resume'
  2. Sandia Letter of Reference
  3. Short Course Outline

I have over 22 years of experience as a Senior and Principal Member of the Technical Staff in the Photovoltaic Technology Department at Sandia National Laboratories in Albuquerque, New Mexico.  I excelled in the development and fabrication of advanced silicon and compound semiconductor photovoltaic cells.  I assisted key members of the U.S. photovoltaics industry to improve the performance and cost of their silicon cell products.  
 
I was the Team Leader of the PV Cell Development Team and $2M/year semiconductor fabrication facility.  I directed 7 team members, authored the annual operating plan, directed all PV cell research projects, and was responsible for all tasks and milestones of the Si cell research project, including quality control.  I also compared PV module and system performance measurements with energy-production model predictions, and developed improvements to predictive model algorithms.  I have extensive experience using Solar Advisor Model, PVsyst, and PVWatts performance models.
 
I have a broad, overall knowledge of the photovoltaics industry, especially the technologies of crystalline and multicrystalline silicon, and concentrating photovoltaics using compound semiconductors for solar cells.  I have a strong background in semiconductor devices and team-oriented approach to problem-solving.  I am skilled at PV cell and module testing and performance analysis.  My methodology involves accurate device measurement, careful performance modeling, determination of performance limiting mechanisms, and development of plans for implementing cost-effective methods of performance improvement.  I have extensive experience in the use of statistically designed experiment software.

I have now been a PV consultant for over six years and have a long list of recommendations from clients.  As a consultant, I have performed due diligence for PV engineering companies involved in utility-scale power plant installations.  I recently developed a short-course in PV technology that includes sections on module reliability, degradation mechanisms, and diagnostic measurements.
 
Before my employment at Sandia, I received my Ph.D. in Physics at the University of Illinois for work in compound-semiconductor device and material characterization, and a in Physics from MIT. I have a strong background in semiconductor devices and team-oriented approach to problem-solving.
 
I offer:
 
  • Innovative and reliable PV cell design, modeling, and performance analysis
  • Quick and efficient pinpointing of performance-limiting mechanisms and cost-effective solutions for their removal
  • Expert witness services for legal proceedings requiring photovoltaic technology expertise.
  • Due diligence and technical expertise on technology selection, conceptual layouts, specification development, and energy production estimates for PV power plant proposals.
  • Present 3-Day Short Course on Silicon PV Manufacturing and Technology to PV manufacturers worldwide
  • PV module, array and system performance measurements and comparison with energy-production model predictions
 
References from my Linked-In website:


Recommendations: as Owner of Douglas Ruby, Ph.D., Consultant to the Photovoltaic Industry
 
“Doug is one of the most knowledgeable experts in the area of silicon solar cell design, processing and . His accomplishments include significant work in concentrator and multicrystalline cells. As the contact monitor at Sandia, Doug demonstrated keen understanding of the problems and technical leadership that helped us to achieve program goals.” February 29, 2012
Dimitri Krut, Sr Staff Engineer & Lab Manager, Spectrolab
was with another company when working with Douglas at Douglas Ruby, Ph.D.
 
“Douglas is a well respected and well known silicon wafer and module expert with many years of professional expertise, both at public research institutes and in industry. His expertise covers the broad range from solar cell device processing to characterization and modeling of solar cells.” February 28, 2012
Top qualities: Expert, Good Value, High Integrity
Armin ABERLE, Deputy CEO at Solar Energy Research Institute of Singapore, Professor at National University of Singapore, Director, Silicon Photovoltaics Department at Solar Energy Research Institute of Singapore, hired Douglas as a Technology consultant in 2010

“Doug is a knowledgeable PV expert who helped my company in its early stages. He provided excellent insight on cell architectures and process parameters to improve cell performance. Doug is easy to work with and a good communicator.” February 24, 2012
Top qualities: Personable, Expert, High Integrity
Ed Murrer, hired Douglas as a PV consulting in 2008

“Douglas has extensive experience in the field of silicon solar cells and is very well qualified to assist companies to achieve performance improvements.” February 24, 2012
Andrew Blakers, Director, Centre for Sustainable Energy Systems, Australian National University, was with another company when working with Douglas at Douglas Ruby, Ph.D.

 “From our mutual work, I found out that Douglas is one of the biggest experts in the PV field.  He knows this field inside out.” February 24, 2012
Dan Shilo, Director General, PV Experts Israel, was with another company when working with Douglas at Douglas Ruby, Ph.D.
 
“Doug performed an audit of PV module measurement capability of the Florida Solar Energy Center. He performed the service in a timely fashion and provided an excellent report of the results.” April 21, 2010
Top qualities: Expert, Good Value, High Integrity
John Wohlgemuth, Current: Principle Reliability Physicist at NREL Past: Program Manager at BP Solar, hired Douglas as a Auditing of PV module measurements in 2009

“Doug Ruby contracted to us at Skyline Solar. His analysis was insightful and thorough. Doug is an expert in Solar Cell modeling and the physics of solar cells. He is a great resource when a technical conundrum is creating a dispute or controversy in a company.” November 3, 2010
Top qualities:Great Results, Expert, High Integrity
Teresa Trowbridge, hired Douglas as a Engineering in 2009

“Doug is an expert in the field of silicon wafer based photovoltaic manufacturing process. He greatly contributed to our project's success and was easy to work with.” April 30, 2009
Top qualities:Great Results, Expert, Good Value
Kurt Laetz, hired Douglas as a Technology & Process Consultant in 2008

“Doug is a great communicator and explains photovoltaics concepts at a level that everyone can understand. He can also go into depth on a number of topics, providing expert insight even to veterans in the solar industry.” April 6, 2009
Top qualities: Personable, Expert, High Integrity
Chris Hendersonhired Douglas for Engineering Training in 2009

“We had hired Doug as a consultant to help us in the Photovoltaic Device area. Doug has lots of experience in c-Si based Solar Cells - device physics and technology. He was able to easily articulate the areas of improvement with solid reasoning. He helped us put together a technological roadmap to achieve our goals. Doug is very professional and friendly to work with. He has very good teaching skills as well.” January 27, 2009
Top qualities: Expert , Good Value , High Integrity
Sanjay Thekdi, hired Douglas as a Photovoltaic Consultant in 2008

“Doug completed a device performance modeling project for our solar cell product development. Doug's work was very helpful in our understanding of the key factors driving performance in our particular device structure. This understanding helped focus development priorities on the most important factors. I found Doug to be very easy to work with, and his work product was excellent and on time. I would hire Doug again without hesitation.” January 26, 2009
Top qualities: Great Results , Expert , High Integrity
Ron Mosso hired Douglas as a PV Device Consultant in 2008

“Doug has extensive experience in solar cells. He was able to quickly pinpoint the areas of improvement in our solar cells. We were able to prioritize the development depending on the expected improvements and were able to reach many of our milestones. His technical input has been very useful for our development and has ranged from device fabrication to characterization.” January 25, 2009
Uma Srinivasan, Principal Device Development Engineer/Manager (Solar R&D) , NanoGram Corporation worked directly with Douglas at Douglas Ruby, Ph.D.

“Doug did a great job for us. His ability to explain observed data and predict the results of tests before they were run saved us many hours of lab time and gave us the theoretical validation that we needed early in our development cycle. Doug is a very easy person to deal with and he was able to tailor his explanations to his audience whether it was a room full of Ph.D.'s or senior execs.” January 6, 2009
Top qualities: Great Results , Personable , Expert
Bill Sanders hired Douglas as a PV Consultant in 2008

 
“Doug did some technical consulting for us in the space of crystalline silicon solar cell passivation, operation under concentrated sunlight and anti-reflection coatings. Doug has a deep working knowledge of what works and can provide detailed recipes that will work. He's a great asset to anyone in the solar cell space.” January 2, 2009
Top qualities: Expert , Good Value , On Time
Peter Peumans hired Douglas as a Technical Consultant in 2008

“Doug has been of great help for our solar cell project. His hands on knowledge helped us with various aspects of testing and characterization. He also did extensive PC1D simulations to help validate our solar cell concept and to help illuminate some of our technical issues. His experience in PV has helped us to move forward more rapidly.” December 24, 2008
Top qualities: Personable , Expert , High Integrity
Henry Hieslmair hired Douglas as a Business Consultant in 2008

“Doug offers years of experience in the area of PV and can bootstrap a PV development effort or add breadth to an existing development effort. He is easy to work with and has excellent contacts within the industry as well.” December 11, 2008
Top qualities: Personable , Expert , Good Value
Jim Hunter, hired Douglas as a PV Consultant in 2008

“Doug is one of the solar industry's most experienced PV cell scientists. He brings a valuable depth of knowledge and clear, methodical approach to engineering design problems. The output of his work hit every technical objective and was done on time.” December 11, 2008
Top qualities: Expert , On Time , High Integrity
Bob MacDonald hired Douglas as a Engineering in 2008

Principal Member of Technical Staff at Sandia National Laboratories
“Doug and I had numerous work related interactions during the time we worked together on several different projects. He was a good source of knowledge when I had a question on the device physics in photovoltaic semiconductors. His education background and experience in the PV field makes him a good resource for device and production related issues.” December 15, 2008
JasonFinn, Member of Technical Staff , Sandia National Laboratories
worked with Douglas at Sandia National Laboratories
 
“I worked with Doug on a number of collaborations on development of solar cell technology between 1990 and 2003 while he was at Sandia Laboratories. This was done both under a CRADA from my previous company as well as part of a industry-wide consortium, which developed innovative and advanced concepts for solar cell fabrication. Doug's participation and leadership exhibited a high scientific standard and he maintained an outstanding professional caliber of experimentation during all this work.” December 11, 2008
Top qualities: Expert , Good Value , Creative
Juris Kalejs hired Douglas as a R&D project leader in 1990 , and hired Douglas more than once

Student at University of Illinois at Urbana-Champaign  
“Douglas was a student with me at MIT and I know him to be very smart, dedicated, hard working and high achieving. I also went to the University of Illinois with Douglas and have kept in touch with him over the years. I know he is a knowledgeable leader in the field of Photovoltaics with extensive experience and achievements.” December 11, 2008
Todd Sauke, Ph.D.
, Student , University of Illinois at Urbana-Champaign
studied with Douglas at University of Illinois at Urbana-Champaign

“I studied with Doug Ruby at the University of Illinois and have kept in touch with him on a regular basis since that time. I have known Doug to be a thoughtful and conscientious person and can definitely recommend him.” December 11, 2008
Darcy Escovedo, Student , University of Illinois at Urbana-Champaign
studied with Douglas at University of Illinois at Urbana-Champaign

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