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发光二极管的优点是:可靠、成本低、亮度高、可与低压集成电路直接配用。发光二极管实质上是一种电发光器件。固体中光的发射是由于所产生的浓度大于热平衡条件的电子和空穴的辐射性复合。电发光器件可分为两类,一类为同质结器件,另一类为异质结器件。同质结器件指单晶体p-n结,复合发生于结内。若半导体二极管用价电子带和导电带之间的禁带宽度适宜的材料制成,它发射可见光。异质结器件结的形式较为复杂,在异质结中结的各侧成分不同。有的是两种半导体材料之间的p-n结,有的则是金属/半导体或金属氧化物/半导体结结构。发光二极管实质上是一种由少数载流子注
The advantages of light-emitting diodes are: reliable, low cost, high brightness, low voltage integrated circuits can be used directly with. Light-emitting diode is essentially an electroluminescent device. The emission of light in a solid is due to the radiative recombination of electrons and holes at a concentration greater than the thermal equilibrium condition. Electroluminescent devices can be divided into two categories, one for the homogeneous junction devices, and the other for heterojunction devices. Homomorphic devices refer to single-crystal p-n junctions that recombine in the junction. If the semiconductor diode with a band gap between the price of electronic tape and conductive tape suitable material, it emits visible light. Heterojunction device junction of the form is more complex in the heterojunction knot in the different sides of the composition. Some are p-n junctions between two types of semiconductor materials, others are metal / semiconductor or metal oxide / semiconductor junction structures. The light-emitting diode is essentially a kind of minority carrier note