Silica Zinc Titanate Wide Bandgap Semiconductor Nanocrystallites: Synthesis and Characterization

Physical simulation, fabrication and characterization of Wide bandgap semiconductor devices

Ultrafast Spectroscopy of Wide Bandgap Semiconductor Nanostructures

Group III-nitrides have been considered a promising choice for the realization of optoelectronic devices since 1970. Since the first demonstration of the high-brightness blue lightemitting diodes (LEDs) by Shuji Nakamura and coworkers, the fabrication of highly efficient white LEDs has passed successful developments. A serious physical issue still remained, which prevents their use for high pow...

Synthesis of Barium-zinc-titanate Ceramics

Mixtures of BaCO3, ZnO and TiO2 powders, with molar ratio of 1:2:4, were mechanically activated for 20, 40 and minutes in a planetary ball mill. The resulting powders were compacted into pellets and isothermally sintered at 1250 °C for 2h with a heating rate of 10 °C/min. X-ray diffraction analysis of obtained powders and sintered samples was performed in order to investigate changes of the pha...

Wide Bandgap Semiconductor Devices and MMICs: A DARPA Perspective

This paper reports on the recent successful completion of Phase I of DARPA’s Wide Bandgap Semiconductor Technology Initiative (WBGSTI). Phase I results are given for semi-insulating substrates and epitaxial growth, and a description and expectations for the upcoming Phases II and III are also provided. INTRODUCTION Wide bandgap devices and MMICs with high power density, high power added efficie...

Wide Bandgap Semiconductor Substrates: Current Status and Future Trends

Wide bandgap semiconductors have expanded the scope of device applications beyond those of silicon and gallium arsenide. Exploitation of wide bandgap semiconductors holds promise for revolutionary improvements in the cost, size, weight and performance of a broad range of military and commercial microelectronic and opto-electronic systems. The inherent material properties of silicon carbide, gal...