Researchers in China have used nitride semiconductor
nanopyramid structures to create light-emitting diodes (LEDs) with spectra that
are similar to those provided by ‘white light’ LEDs with yellow phosphors [Kui
Wu et al, J. Appl. Phys., vol115, p123101, 2014]. The researchers are at the
Chinese Academy of Sciences’s institutes of Semiconductors and Mechanics, and
Tsinghua University. A similar CAS/Tsinghua team previously reported such
devices, using a polystyrene nanosphere mask to make holes for selective-area
growth of nanopyramids.