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2019-12-17
Huang, Hsiang-Hung, Toprasertpong, Kasidit, Delamarre, Amaury, Watanabe, Kentaroh, Sugiyama, Masakazu, Nakano, Yoshiaki.  2019.  Numerical Demonstration of Trade-off between Carrier Confinement Effect and Carrier Transport for Multiple-Quantum-Well Based High-Efficiency InGaP Solar Cells. 2019 Compound Semiconductor Week (CSW). :1-2.

To promote InGaP solar cell efficiency toward the theoretical limit, one promising approach is to incorporate multiple quantum wells (MQWs) into the InGaP host and improve its open-circuit voltage by facilitating radiative carrier recombination owing to carrier confinement. In this research, we demonstrate numerically that a strain-balanced (SB) In1-xGaxP/In1-yGayP MQW enhances confined carrier density while degrades the effective carrier mobility. However, a smart design of the MQW structure is possible by considering quantitatively the trade-off between carrier confinement effect and carrier transport, and MQW can be advantageous over the InGaP bulk material for boosting photovoltaic efficiency.