Here is Adjustable Led Street Lamps exporter talking about the misunderstanding of LED heat dissipation.
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At present, the misunderstanding of LED heat dissipation is mainly reflected in the following aspects:
1. The internal quantum efficiency is not high.
That is, when electrons and holes recombine, photons cannot be generated 100%, and it is generally called "current leakage" to lower the recombination rate of carriers in the PN region. The leakage current multiplied by the voltage is the power of this part, that is, it is converted into heat energy, but this part does not occupy the main component, because the internal photon efficiency is now close to 90%.
2. The internally generated photons cannot be completely emitted to the outside of the chip and finally converted into heat.
This part is the main one, because the current external quantum efficiency is only about 30%, and most of it is converted into heat.
3. Over-reliance on thermally conductive materials.
Because of the high-tech materials used, the heat can be dissipated. Its practical ordinary aluminum heat dissipation, after repeated tests, the temperature of the heat sink is only 3-5 degrees Celsius higher than the bottom of the radiator. That is to say, if a material with excellent thermal conductivity can be used, the temperature can be lowered by 3-5 degrees Celsius when the thermal resistance is zero.
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