50 years
ago, people have to understand semiconductor material can have basic
knowledge of light, the first commercially produced in 1960 in
mid-diode. LED light distribution in English diode (light-emitting
diode) acronym, and its basic structure is an electroluminescent
semiconductor material, placed in a wire rack, and then sealed with
epoxy resin four weeks, played the role of protecting the internal core
wire Therefore, a good seismic performance LED's. The core part of the
light-emitting diode is a p-type semiconductor and n-type semiconductor
chip formed in the p-type semiconductor and n-type semiconductor
between a transition layer known as the pn junction. In some
semiconductor materials, PN junction, the injected minority carrier and
majority carrier recombination, when will the excess energy is released
in the form of light, which converts electrical energy directly into
light. PN junction reverse voltage increases, minority-carrier
injection is difficult, it is not light. Such use of injection
electroluminescent diodes called the principle of production of
light-emitting diodes, known as LED. |
