Abstract: Semiconductor quantum dots embedded in glass,prepared with the method of co-melting,are graded spherical.Considering the gradation profile as a radial exponential function,the electric potential equation is solved in spherical coordinates.The electric dipole moment of the graded spherical quantum dot in glass is obtained.The results show that the dipole moment is proportional to the volume of the quantum dot.The relation of the dipole moment to the permittivity is presented.

Key words: graded spherical quantum dot, electric dipole moment, polarization, glass