Provider: Ingenta Connect
Database: Ingenta Connect
Content: application/x-research-info-systems
TY - ABST
AU - Kan, Pengzhi
AU - Wang, Yongsheng
AU - Zhao, Suling
AU - Xu, Zheng
AU - Wang, Dawei
TI - Electroluminescence Dependence on the Organic Thickness in ZnO Nano Rods/Alq3 Heterostructure Devices
JO - Journal of Nanoscience and Nanotechnology
PY - 2011-04-01T00:00:00///
VL - 11
IS - 4
SP - 3470
EP - 3473
KW - ZNO NANO RODS
KW - ELECTROLUMINESCENCE
KW - EXCITON EMISSION
N2 - ZnO nanorods are synthesised by a hydrothermal method on ITO glass. Their crystallization and morphology are detected by XRD and SEM, respectively. The results show that the ZnO nanorod array has grown primarily along a direction aligned perpendicular to the ITO substrate. The average height and diameter of the nanorods is about 130 nm and 30 nm, respectively. Then ZnO nano rods/Alq3 heterostructure LEDs are prepared by thermal evaporation of Alq3 molecules. The thicknesses of the Alq3 layers are 130 nm, 150 nm, 170 nm and 190 nm, respectively. The electroluminescence of the devices is detected under different DC bias voltages. The exciton emission of Alq3 is detected in all devices. When the thickness of Alq3 is 130 nm, the UV electroluminescence of ZnO is around 382 nm, and defect emissions around 670 nm and 740 nm are detected. Defect emissions of ZnO nanorods are prominent. When the thickness of Alq3 increases to over 170 nm, it is difficult to observe defect emissions from the ZnO nano rods. In such devices, the exciton emission of Alq3 is more prominent than other emissions under different bias voltage.
UR - https://www.ingentaconnect.com/content/asp/jnn/2011/00000011/00000004/art00096
M3 - doi:10.1166/jnn.2011.3808
UR - https://doi.org/10.1166/jnn.2011.3808
ER -