| 摘要 |
In a preferred embodiment, a light emitting device comprising: a polar template; a p-type layer grown on the polar template; the p-type layer having a first polarization vector; the first polarization vector having a first projection relative to a growth direction; an n-type layer grown on the p-type layer; the n-type layer having a second polarization vector; the second polarization vector having a second projection relative to said growth direction that is larger than the first projection of the first polarization vector for the p-type layer; the n-type layer and p-type layer forming an interface; whereby the first polarization vector in the p-layer and second polarization vector in the n-layer create a discontinuity at the interface resulting in a negative charge appearing at the interface. In another preferred embodiment, a light emitting device comprising: a polar template; a n-type layer grown on the template; the n-type layer having a first polarization vector; the first polarization vector having a first projection relative to a growth direction; an p-type layer grown on the n-type layer; the p-type layer having a second polarization vector; the second polarization vector having a second projection relative to said growth direction that is larger than the first projection of the first polarization vector for the p-type layer; the n-type layer and p-type layer forming an interface; whereby the first polarization vector in the p-layer and second polarization vector in the n-layer create a discontinuity at the interface resulting in a negative charge appearing at the interface.
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