LED application technically difficult problem

In theory the luminous efficiency LED can be as high as 200 lm/w above, and the existing white LED is only 85 lm/w or so, and energy-saving fluorescent lamps, there is still a gap compared, and its price and the traditional light than a great disadvantage. So how to as soon as possible the advantage of LED display true will become the relevant employees must now face of technical problems. But to really develop a whole new semiconductor lighting era, we also the following several aspects to conquer technical problems and further standardize semiconductor lighting market.

The chip is LED core, its internal quantum efficiency directly affects the efficiency of led light bulbs. The radiation compound rate will decide the chip the size of the heat production. Can say only produce has good quality LED chip, just may have the superior performance of the LED light source.In order to be able to try to improve efficiency and reduce internal quantum no radiation compound rate, mainly from the two aspects to improve the quality of chips, also is to choose a reasonable chip structure and control chip density.

The structure of the LED chips has single heterogeneous structure, double heterostructure and quantum well structures, etc, it to the luminous efficiency has a very big effect. At present is the most widely used and most efficient chip structure which is quantum well structures, for LED is concerned, the extension of the substrate and the lattice constant and heat coefficient whether matching, extension of preparation technology, etc, will directly influence the density of the grid. These may be in some conditions, especially for iii-nitrogen shine may favor, but for most case, because the existence, will shorten the chip of continuous operation life, reduce the density and light output reduction carriers, and may be no radiation recombination center.