Recent developments in theoretical techniques have significantly improved the predictive
power of density-functional-based calculations. In this review, we discuss how such …

Nitride semiconductors are a promising class of materials for solar energy conversion
applications, such as photovoltaic and photoelectrochemical cells. Nitrides can have better …

Wide-band-gap GaN and Ga-rich InGaN alloys, with energy gaps covering the blue and
near-ultraviolet parts of the electromagnetic spectrum, are one group of the dominant …

Optimization of internal quantum efficiency (IQE) for InGaN quantum wells (QWs) light-
emitting diodes (LEDs) is investigated. Staggered InGaN QWs with large electron-hole …

We report on III-nitride photovoltaic cells with external quantum efficiency as high as 63%. In
x Ga 1− x N/GaN pin double heterojunction solar cells are grown by metal-organic chemical …

Coaxial core/shell nanowires represent an important class of nanoscale building blocks with
substantial potential for exploring new concepts and materials for solar energy conversion …

We report on the fabrication and photovoltaic characteristics of InGaN solar cells by
exploiting InGaN/GaN multiple quantum wells (MQWs) with In contents exceeding 0.3 …

Solar cells are a promising renewable and carbon-free electric energy resource to address
the fossil-fuel shortage and global warming. Energy conversion efficiencies over 40% have …

We review recent progress towards increasing solar cell efficiencies beyond the Shockley‐
Queisser efficiency limit. Four main approaches are highlighted: multi‐junction cells …

High internal and external quantum efficiency GaN/InGaN solar cells are demonstrated. The
internal quantum efficiency was assessed through the combination of absorption and …