Multi-scale, multi-physics NEGF quantum transport for nitride LEDs

Abstract

The operation of multi-quantum well LEDs is determined by the carrier flow through complex, extended quantum states, the optical recombination between these states and the optical fields in the device. Non-equilibrium Green Function Formalism (NEGF) is the state-of-the-art approach for quantum transport, however when it is applied in its textbook form it is numerically too demanding to handle realistically extended devices. This work introduces a new approach to LED modeling based on a multi-scaled NEGF approach that subdivides the critical device domains and separates the quantum transport from the recombination treatments. First comparisons against experimental data appear to be promising.