Vertical ZnO nanorod/Si contact light-emitting diode

Blue-white light emission was obtained from glass/indium tin oxide (ITO)/n-ZnO nanorod array ( NRA ) / p + -Si vertical contact light emitting diodes (VCLEDs). The nanoscale p-n heterojunction VCLEDs were formed by direct engagement n − -tips of n-ZnO NRA grown vertically on an ITO/glass substrate with p + -Si wafer. Proposed configuration of the VCLED allows creating a high density ( ∼ 10 9 cm − 2 ) of self-assembled ZnO/Si nanodiodes with point junctions of high quality due to structural perfection of the Si wafer and the tips of ZnO nanorods as well as providing a high injection current and light emission from the NRA VCLED required for solid state lighting.