Three-dimensional AlN microroses and their enhanced photoluminescence properties.

Three-dimensional AlN microroses and their enhanced photoluminescence propertiesw

Enhanced luminescence of Er+3-doped Zinc-Lead-Phosphate Glass embedded SnO2 nanoparticles

Introduction of the nanoparticles in the bulk glass received a large interest due to their versatile application. The composition of Er+3-doped Zinc-Lead-Phosphate glass samples are prepared by melt-quenching technique. The structural and optical properties of phosphate glass have been examined by x-ray diffraction, fie...

Arc Discharge Synthesis and Photoluminescence of 3D Feather-like AlN Nanostructures

A complex three-dimensional (3D) feather-like AlN nanostructure was synthesized by a direct reaction of high-purity Al granules with nitrogen using an arc discharge method. By adjusting the discharge time, a coral-like nanostructure, which evolved from the feather-like nanostructure, has also been observed. The novel 3D feather-like AlN nanostructure has a hierarchical dendritic structure, whic...

Anisotropic structural and optical properties of semi-polar (11-22) GaN grown on m-plane sapphire using double AlN buffer layers.

We report the anisotropic structural and optical properties of semi-polar (11-22) GaN grown on m-plane sapphire using a three-step growth method which consisted of a low temperature AlN buffer layer, followed by a high temperature AlN buffer layer and GaN growth. By introducing double AlN buffer layers, we substantially improve the crystal and optical qualities of semi-polar (11-22) GaN, and si...

Photoluminescence in two-dimensional crystals

Two-dimensional (2D) crystals derived from layered structures exhibit a unique set of properties as elegantly demonstrated for graphene. Semiconducting 2D structures such as MoS2 sheets are attractive building blocks for novel electronic and optoelectronic devices. In this talk, I will report photoluminescence properties of group 6 transition metal dichalcogenide (TMD) 2D crystals and discuss h...