Scientists use nano wire sheet to create a flexible LED

According to reports, the Asian University of Korea (AjouUniversity) nano materials and the use of a large number of experts recently display production of Zinc Oxide (ZnO) nanowires (nanowire) sheet of paper like Zinc Oxide, the development of a preparation of Zinc Oxide / organic composite light emitting diode (LED) simple method. Due to the use of independent (free-standing) ZnO nanowire thin films, it is possible to produce a flexible (flexible) LED in UV or visible light at low cost.

Researchers in the laboratory of atmospheric environment, ZnO nanowires growth phase generated with cottony appearance by gas, followed by simple filtration and dispersion, can be the production transformation of ZnO nanowires into paper sheet is flexible; it is worth mentioning that the Zinc Oxide nanowire synthesis technology easily to expand the industrial scale, while Zinc Oxide nanowire preparation of sections is also only use cheap equipment.

The use of simple mechanical stamping, let Zinc Oxide fit in the P nanowires thin type organic semiconductor material, can produce heterojunction (hetero-junction) of the research team, using several kinds of composite LED. P type organic semiconductor materials, and study their corresponding electroluminescence (ELectroluminescent) spectra.

This study not only shows a new method for preparing Zinc Oxide / organic composite light-emitting diodes, but also allows researchers to understand the mechanism of defect related electroluminescence in Zinc Oxide nanowires. At present, the defect related luminescence is more intense than that of the ZnO crystal in the visible light.

The team will then try to improve the performance of the composite light emitting diode, possible methods include adjusting light emitting characteristics using the defect control of ZnO nanowires, or with metal particles modified ZnO nanowires surface using surface plasmon (sufraceplasmon) effect. The possible application of the flexible Zinc Oxide nanowire thin film also includes solar cells and sensors.