Analytic Approach for Global Structure Optimization of Multiple Quantum Well Solar Cells

The effective mobility model is proposed as a convenient tool for the analysis and design of multiple quantum well (MQW) solar cells. The analytical formula for MQW effective mobility and its lower limit for solar cell application are discussed. By plotting MQW band gap-mobility mappings, the feasible band gap range of MQWs, in terms of carrier transport, can be analytically estimated for the first time. In this way, the structure optimization of MQW for narrower band gap, which has been carried out through trail-and-error experiments so far, becomes available through a simple calculation procedure.