Patent ID: 7928463

Claim:
A light emitting device, comprising: a light-emitting structure, comprising: a P-type layer; a transparent conductive layer, having an electrical resistivity ρ t , a thickness t t and a carrier mobility μ t ; and an N-type layer, having an electrical resistivity ρ n , a thickness t n , and a carrier mobility μ n ; and a magnetic material, coupled with the light-emitting structure to produce a magnetic field B in the light-emitting structure, wherein a magnetoresistance of the transparent conductive layer ρ t t t ⁢ ( 1 + μ t 2 ⁢ B 2 ) is substantially equal to a magnetoresistance of the N-type layer ρ n t nI ⁢ ( 1 + μ n 2 ⁢ B 2 ) .