Figure 6

(a) Drift-diffusion model adopted for IBSC. G_{V I}, G_IC, G_VC, stand for photon generation while R_VI, R_IC, R_VC stand for recombination, where the indices V, I and C correspond to the valence band, intermediate band and conduction band respectively. Three quasi-Fermi levels (green line) are also given for each band. (b) Geometric information of QD and QD array used in multi-band kp calculation. The unit box is represented by three sides of length of L_x, L_y and L_z²⁶. (c) Absorption coefficients between IB and CB, VB and IB and VB and rest of CB.