Blue and white light emission from zinc oxide nanoforests

• Nafisa Noor,
• Luca Lucera,
• Thomas Capuano,
• Venkata Manthina,
• Alexander G. Agrios,
• Helena Silva and
• Ali Gokirmak

Beilstein J. Nanotechnol. 2015, 6, 2463–2469, doi:10.3762/bjnano.6.255

• indicate that the dielectric breakdown of ZnO, sublimation, and plasma formation processes are the underlying mechanisms. Keywords: electrical stress; light emission; nanoforest; plasma; zinc oxide; Introduction The interest in environmentally friendly semiconductors, biocompatible [1], functional

• voltage and observed as multiple, brief flashes during long excitations. The emitted light seemed to follow a changing percolation path between the contacts (Figure 3, multimedia view) [20] as the materials experience changes in thermal and electrical properties over time due to the high electrical stress

• after a DC test showing evidence of melting and recrystallization of the material under electrical stress. Optical microscope images showing two tungsten probes placed on a continuous ZnO nanoforest before (left) and after (right) a DC measurement test. The melting of the micrometer-sized probe tips