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 (similar to 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. (C) 2011 American Institute of Physics. [doi:10.1063/1.3562608]