PbSe胶体量子点红外LED的探究

Infrared light-emitting diodes (LEDs) have been widely used for military and civilian. PbSe quantum dots prepared were combined with GaN LED and produced two type near-infrared LED, one is the traditional solid powder PbSe quantum dot spin-coated on GaN blue LED; the other is the use of quartz glass dome to storage liquid PbSe quantum dots. Both devices were tested external quantum efficiency (EQE) under different concentration, the two result also be compared. Liquid QDs LED have good properties, the maximum external quantum efficiency can reach 4.91%. Due to non-radiative recombination and Auger recombination, liquid-state QDs LED obtained the best to store quantum dots, the optical properties of the device is the best form.