Exciton–phonon complexes and optical properties in CdSe nanocrystals

摘要: A method to calculate the quantum states of exciton–phonon complexes in semiconductor nanocrystals is presented. The are built from a basis set made products phonon and electron–hole pairs, which coupled through electron–phonon Frohlich interaction, Coulomb exchange interactions. In CdSe nanocrystals, conduction band electrons described by effective mass equation, while holes represented spherical 4 × Baldereschi–Lipari Hamiltonian. It shown that flexible complete basis, not limited 1s–1S3/2 octet, essential obtain converged eigenvalues correct polaron shift exciton energy. study spectral properties presented; particular, region involves lowest complex eigenstates analysed details. Specifically, non-adiabatic nature dynamics examined clearly vibron were obtained.