The performance of a solar cell depends on the intrinsically on the parameters of the junction. The goal of the class is to expand the understanding and analysis of junctions from the relatively ideal cases typically considered to include advanced concepts and approaches. The goals of the class are to first analyze pn junctions and include non-idealities such as surface recombination; injection-level or doping-dependence; and material parameters which are time, spatially or temperature dependent. The class then covers advanced topics in junctions, such as multi-junctions and the tunnel junctions between them; the physics of heterojunctions; and other junctions such Schottky diodes, Ohmic contacts and MIS approaches. Finally, the course examines new concepts in junction theory such as induced junctions, and carrier or energy selective contacts.
In Fall 2012 ASU and QESST started a new class on the manufacture of silicon solar cells – the same type of cells used in nearly all solar photovoltaic systems installed worldwide. Students learn about modern techniques of solar cell fabrication in their classroom. Students also work as “virtual engineers” in the Virtual Solar Cell Factory – an online solar cell factory simulation – where they will have attempt to “save the company” using the manufacturing engineering science techniques being taught in their classroom.
ASU continues to install photovoltaic systems across the constituent campuses. Presently over 15 MW of capacity are installed with an expected capacity of 17 MW by the end of 2012.
Milestones as of June 30, 2012: Total Solar Generation Capacity:15.3 MW Total Solar Systems: 58
(52 on Tempe campus; 2 on West campus; 2 on Downtown campus; 2 on Polytechnic campus) Total Number of Panels and Collectors Installed: 61,203
The is more information on the individual systems at:
On June 18 twenty undergraduate students from around the country gathered to work in the silicon pilot line. The students have the task of increasing solar cell efficiency on the line by 1-2 percentage points. In industry, this level of improvement is the difference between profit and loss for a company with a production line.
On May 28th forty-nine people from ten countries converged upon Arizona State University for the International Characterization and Modeling Workshop. The attendees ranged from first year graduate students to professors and experts in the field. In all, fourteen universities and four companies were represented at the workshop.
The silicon solar cell pilot line has been in operation for over a year. This month the line formally started operation as Testbed 1: Student Led Pilot line. Pictured on the right we have the Men in White. As part of their senior design thesis they will rescue solar cells from the ravages of low efficiency and slay the dragons of low yield.
The QESST will continue until finding the holy grail of high efficiency low cost solar cells in May next year.