Enhancing power of ZnO nanoparticle LEDs using silica coated silver Nano-particles

摘要

In the digital and multimedia era, light emitting diodes (LEDs) has vast potential use in solid state lighting for their high efficiency, low power consumption, low heat output, and long lifetime. Currently, gallium nitride (GaN) based LEDs are used for lighting, but these devices have a problem of high cost (epitaxial film growth technologies are costly). Therefore, we need to develop the low-cost LEDs. On the other hand, Zinc oxide (ZnO) is abundant resource and inexpensive. Now we can produce p-type ZnO nanoparticles (NPs) by nitrogen doping and succeeded to make the coated LEDs by using ZnO nanoparticles. These coated type LEDs do not require an expensive single crystal substrate, so it is possible to produce a low-cost LEDs. But the emission intensity has not reached a practical level .