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Silicon research of the Webergroup

Research Fields

Our group has over 20 years of experience studying transition metals in silicon. The main directions of our current research are

Various tools are employed for the characterization of electrical, optical, and structural properties of silicon materials and devices. Our research group has produced numerous publications and has conducted a numerous collaborations with industry and academia.


Silicon is the second most naturally abundant material in the Earth's crust, and it is easily doped to engineer its electrical properties. For these reasons, silicon is perhaps the single most important semiconductor material in recent human history. Not only is silicon the basis for integrated circuit (IC) technology, it is also the most widely used material for photovoltaic (PV) modules which convert sunlight into electrical energy. Transition metal contamination of silicon is a serious problem for both industries, as these contaminants create highly recombination-active states deep in the bandgap of the material, which effectively degrade device performance. Understanding the Physics of Transition Metal Contamination is the key to developing effective Gettering and Passivation Techniques for reducing the detrimental effect of transition metals on device performance. Studies of The Effects of Transition Metals in PV Device Performance focus specifically on increasing the efficiency of solar cells. In addition, our group's expertise is applied to the investigation of High-k Dielectrics that involve zirconium and halfnium.

This page is maintained by Tonio Buonassisi. Please email him with updates. Last revised: August 28, 2002








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