White light emission from CdTe quantum dots decorated n-ZnO nanorods/p-GaN light-emitting diodes

ZnO-based heterostructured light-emitting diode was fabricated by hydrothermally growing ZnO nanorods on p-type GaN substrate. Blue-violet electroluminescence was observed from the ZnO/GaN diode. The color-tunable CdTe quantum dots (QDs) samples with photoluminescence emission peaks ranging from 550 nm to 660 nm were synthesized. We fabricated two hybrid light-emitting diodes by decorating different CdTe QDs on the ZnO nanorods/GaN diodes, the white light emission was effectively observed from such devices.