Group-III nitride nanowire structures, including GaN, InN, AlN and their alloys, have been
intensively studied in the past decade. Unique to this material system is that its energy …

Artificial photosynthesis, ie the chemical transformation of sunlight, water and carbon dioxide
into high-energy-rich fuels is one of the key sustainable energy technologies to enable a …

Solar water splitting is one of the key steps in artificial photosynthesis for future carbon-
neutral, storable and sustainable source of energy. Here we show that one of the major …

The over-dependence on fossil fuels is one of the critical issues to be addressed for
combating greenhouse gas emissions. Hydrogen, one of the promising alternatives to fossil …

Semiconductor nanowires (NWs) are characterized by an extraordinarily large surface-to-
volume ratio. Consequently, surface effects are expected to play a much larger role than in …

GaN nanowires (NWs) doped with Mg as a p-type impurity were grown on Si (111)
substrates by plasma-assisted molecular beam epitaxy. In a systematic series of …

Almost all electronic devices utilize a pn junction formed by random doping of donor and
acceptor impurity atoms. We developed a fundamentally new type of pn junction not formed …

GaN nanowires, also called nanocolumns, have emerged over the last decade as promising
nanosized building blocks for a wide variety of optoelectronic devices. In contrast to other III …

With increasing interest in GaN based devices, the control and evaluation of doping are
becoming more and more important. We have studied the structural and electrical properties …

The world needs economical and sustainable alternate energy sources to combat the
irreversible phenomenon like global warming. Solar photovoltaic technology, which converts …