IBM Systems Magazine, Power Systems Edition - August 2010 - (Page 45)

IBM Systems Magazine spoke with Mitzi shortly after the release of the study, “High-Efficiency Solar Cell With Earth-Abundant Liquid-Processed Absorber,” to learn more about this announcement and how and why IBM is pursuing solar-cell technologies. Q. How is IBM’s approach to developing solar cells different from that of other organizations? A. We had a program in solution-based processing of material for three years and the focus of that project was on thin-film metal chalcopyrite-based solar cell material. Chalcopyrite refers to a metal sulfide or selenide material with a certain crystal structure. In particular, our goal was to try to come up with a very low-cost, high-efficiency way of putting these materials down, because ultimately cost is by far the primary impediment to the commercialization of photovoltaic technology. We published a document in 2008 that showed we could put down a material called copper indium gallium diselenide (CIGS) using a solution-based process and, without too much work, we got pretty high efficiency in these devices. The main focus of the project was to increase the performance of these devices and to scale up to larger areas and to make the fabrication process more environmentally friendly. One thing that became evident, however, is that CIGS contains two elements—gallium and indium—that are quite expensive. Indium, for example, costs about $1,000 (USD) per kilogram. In addition, indium is a relatively rare element. And there are predictions that CIGS technology would be limited to less than 100 gigawatts per year capacity because of the use of indium. Some reports indicate that 70 gigawatts annual production are as much as you could imagine doing. Of course, that’s a very small number relative to the ultimate electrical needs of the world, even though it’s a large number compared to what’s currently being supplied by solar energy. With this in mind, we became interested in looking for alternative materials that don’t contain gallium and indium and determining whether we could use our process for depositing CIGS for a new material made of copper, zinc, tin, and sulfur and/or selenium (CZTS) with the copper and zinc taking the place of the gallium and indium. Zinc and tin “Not only were we able to deposit these materials, but they exceeded prior records for this class.” —David Mitzi, manager, Photovoltaic Science and Technology, IBM T. J. Watson Research Center ibmsystemsmag.com/power AUGUST 2010 45 http://www.ibmsystemsmag.com/power

Table of Contents for the Digital Edition of IBM Systems Magazine, Power Systems Edition - August 2010

IBM Systems Magazine, Power systems Edition - August 2010
Table of Contents
On The Web
Editor's Desk: Family Support
Dashboard: Creativity Rules, Security Careers are Smart, Software Aquisistions, The Pursuit of Internet
Trends: Extending Green Facility Concepts Beyond the Data Center
Data Display: The Best CEOs Share a Tolerance for Uncertainty
Case Study: United Notions & Fabrics Quilts Together a Quality IT Environment on a Budget.
Your Support Crew: IBM's Comprehensive Tools and User Communities Help Maximize Your Investment.
Centralized Support: IBM Support Portal Provides Everything You Need to Stay Up and Running.
The Education Challenge: Be Creative with Ongoing Employee Training
Focus on Storage: IBM XIV Gains Enterprise Acceptance, Clout and Capacity
Next: IBM Researchers Shine a New Light on Solar-Cell Technology
Solutions
Power Systems Interface
Advertiser's Index
IBM Perspective: Supporting Business Needs
Snapshot: Lunch Conversations Lead to IT Career

IBM Systems Magazine, Power Systems Edition - August 2010

IBM Systems Magazine, Power Systems Edition - August 2010 - IBM Systems Magazine, Power systems Edition - August 2010 (Page Cover1)
IBM Systems Magazine, Power Systems Edition - August 2010 - IBM Systems Magazine, Power systems Edition - August 2010 (Page Cover2)
IBM Systems Magazine, Power Systems Edition - August 2010 - IBM Systems Magazine, Power systems Edition - August 2010 (Page 1)
IBM Systems Magazine, Power Systems Edition - August 2010 - Table of Contents (Page 2)
IBM Systems Magazine, Power Systems Edition - August 2010 - Table of Contents (Page 3)
IBM Systems Magazine, Power Systems Edition - August 2010 - Table of Contents (Page 4)
IBM Systems Magazine, Power Systems Edition - August 2010 - Table of Contents (Page 5)
IBM Systems Magazine, Power Systems Edition - August 2010 - On The Web (Page 6)
IBM Systems Magazine, Power Systems Edition - August 2010 - On The Web (Page 7)
IBM Systems Magazine, Power Systems Edition - August 2010 - On The Web (Page 8)
IBM Systems Magazine, Power Systems Edition - August 2010 - On The Web (Page 9)
IBM Systems Magazine, Power Systems Edition - August 2010 - Editor's Desk: Family Support (Page 10)
IBM Systems Magazine, Power Systems Edition - August 2010 - Editor's Desk: Family Support (Page 11)
IBM Systems Magazine, Power Systems Edition - August 2010 - Dashboard: Creativity Rules, Security Careers are Smart, Software Aquisistions, The Pursuit of Internet (Page 12)
IBM Systems Magazine, Power Systems Edition - August 2010 - Dashboard: Creativity Rules, Security Careers are Smart, Software Aquisistions, The Pursuit of Internet (Page 13)
IBM Systems Magazine, Power Systems Edition - August 2010 - Trends: Extending Green Facility Concepts Beyond the Data Center (Page 14)
IBM Systems Magazine, Power Systems Edition - August 2010 - Trends: Extending Green Facility Concepts Beyond the Data Center (Page 15)
IBM Systems Magazine, Power Systems Edition - August 2010 - Trends: Extending Green Facility Concepts Beyond the Data Center (Page 16)
IBM Systems Magazine, Power Systems Edition - August 2010 - Trends: Extending Green Facility Concepts Beyond the Data Center (Page 17)
IBM Systems Magazine, Power Systems Edition - August 2010 - Data Display: The Best CEOs Share a Tolerance for Uncertainty (Page 18)
IBM Systems Magazine, Power Systems Edition - August 2010 - Data Display: The Best CEOs Share a Tolerance for Uncertainty (Page 19)
IBM Systems Magazine, Power Systems Edition - August 2010 - Case Study: United Notions & Fabrics Quilts Together a Quality IT Environment on a Budget. (Page 20)
IBM Systems Magazine, Power Systems Edition - August 2010 - Case Study: United Notions & Fabrics Quilts Together a Quality IT Environment on a Budget. (Page 21)
IBM Systems Magazine, Power Systems Edition - August 2010 - Case Study: United Notions & Fabrics Quilts Together a Quality IT Environment on a Budget. (Page 22)
IBM Systems Magazine, Power Systems Edition - August 2010 - Case Study: United Notions & Fabrics Quilts Together a Quality IT Environment on a Budget. (Page 23)
IBM Systems Magazine, Power Systems Edition - August 2010 - Your Support Crew: IBM's Comprehensive Tools and User Communities Help Maximize Your Investment. (Page 24)
IBM Systems Magazine, Power Systems Edition - August 2010 - Your Support Crew: IBM's Comprehensive Tools and User Communities Help Maximize Your Investment. (Page 25)
IBM Systems Magazine, Power Systems Edition - August 2010 - Your Support Crew: IBM's Comprehensive Tools and User Communities Help Maximize Your Investment. (Page 26)
IBM Systems Magazine, Power Systems Edition - August 2010 - Your Support Crew: IBM's Comprehensive Tools and User Communities Help Maximize Your Investment. (Page 27)
IBM Systems Magazine, Power Systems Edition - August 2010 - Your Support Crew: IBM's Comprehensive Tools and User Communities Help Maximize Your Investment. (Page 28)
IBM Systems Magazine, Power Systems Edition - August 2010 - Your Support Crew: IBM's Comprehensive Tools and User Communities Help Maximize Your Investment. (Page 29)
IBM Systems Magazine, Power Systems Edition - August 2010 - Centralized Support: IBM Support Portal Provides Everything You Need to Stay Up and Running. (Page 30)
IBM Systems Magazine, Power Systems Edition - August 2010 - Centralized Support: IBM Support Portal Provides Everything You Need to Stay Up and Running. (Page 31)
IBM Systems Magazine, Power Systems Edition - August 2010 - Centralized Support: IBM Support Portal Provides Everything You Need to Stay Up and Running. (Page 32)
IBM Systems Magazine, Power Systems Edition - August 2010 - Centralized Support: IBM Support Portal Provides Everything You Need to Stay Up and Running. (Page 33)
IBM Systems Magazine, Power Systems Edition - August 2010 - The Education Challenge: Be Creative with Ongoing Employee Training (Page 34)
IBM Systems Magazine, Power Systems Edition - August 2010 - The Education Challenge: Be Creative with Ongoing Employee Training (Page 35)
IBM Systems Magazine, Power Systems Edition - August 2010 - The Education Challenge: Be Creative with Ongoing Employee Training (Page 36)
IBM Systems Magazine, Power Systems Edition - August 2010 - The Education Challenge: Be Creative with Ongoing Employee Training (Page 37)
IBM Systems Magazine, Power Systems Edition - August 2010 - The Education Challenge: Be Creative with Ongoing Employee Training (Page 38)
IBM Systems Magazine, Power Systems Edition - August 2010 - The Education Challenge: Be Creative with Ongoing Employee Training (Page 39)
IBM Systems Magazine, Power Systems Edition - August 2010 - Focus on Storage: IBM XIV Gains Enterprise Acceptance, Clout and Capacity (Page 40)
IBM Systems Magazine, Power Systems Edition - August 2010 - Focus on Storage: IBM XIV Gains Enterprise Acceptance, Clout and Capacity (Page 41)
IBM Systems Magazine, Power Systems Edition - August 2010 - Focus on Storage: IBM XIV Gains Enterprise Acceptance, Clout and Capacity (Page 42)
IBM Systems Magazine, Power Systems Edition - August 2010 - Focus on Storage: IBM XIV Gains Enterprise Acceptance, Clout and Capacity (Page 43)
IBM Systems Magazine, Power Systems Edition - August 2010 - Next: IBM Researchers Shine a New Light on Solar-Cell Technology (Page 44)
IBM Systems Magazine, Power Systems Edition - August 2010 - Next: IBM Researchers Shine a New Light on Solar-Cell Technology (Page 45)
IBM Systems Magazine, Power Systems Edition - August 2010 - Next: IBM Researchers Shine a New Light on Solar-Cell Technology (Page 46)
IBM Systems Magazine, Power Systems Edition - August 2010 - Next: IBM Researchers Shine a New Light on Solar-Cell Technology (Page 47)
IBM Systems Magazine, Power Systems Edition - August 2010 - Solutions (Page 48)
IBM Systems Magazine, Power Systems Edition - August 2010 - Solutions (Page 49)
IBM Systems Magazine, Power Systems Edition - August 2010 - Solutions (Page 50)
IBM Systems Magazine, Power Systems Edition - August 2010 - Power Systems Interface (Page 51)
IBM Systems Magazine, Power Systems Edition - August 2010 - Power Systems Interface (Page 52)
IBM Systems Magazine, Power Systems Edition - August 2010 - Advertiser's Index (Page 53)
IBM Systems Magazine, Power Systems Edition - August 2010 - IBM Perspective: Supporting Business Needs (Page 54)
IBM Systems Magazine, Power Systems Edition - August 2010 - IBM Perspective: Supporting Business Needs (Page 55)
IBM Systems Magazine, Power Systems Edition - August 2010 - Snapshot: Lunch Conversations Lead to IT Career (Page 56)
IBM Systems Magazine, Power Systems Edition - August 2010 - Snapshot: Lunch Conversations Lead to IT Career (Page Cover3)
IBM Systems Magazine, Power Systems Edition - August 2010 - Snapshot: Lunch Conversations Lead to IT Career (Page Cover4A)
IBM Systems Magazine, Power Systems Edition - August 2010 - Snapshot: Lunch Conversations Lead to IT Career (Page Cover4B)
IBM Systems Magazine, Power Systems Edition - August 2010 - Snapshot: Lunch Conversations Lead to IT Career (Page RF1)
IBM Systems Magazine, Power Systems Edition - August 2010 - Snapshot: Lunch Conversations Lead to IT Career (Page RF2)
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