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Gasb Thermophotovoltaic Cells Grown On Gaas By Molecular Beam Epitaxy Using Interfacial Misfit Arrays, Bor-Chau Juang, Ramesh B. Laghumavarapu, Brandon J. Foggo, Paul J. Simmonds, Andrew Lin, Baolai Liang, Diana L. Huffaker

Physics Faculty Publications and Presentations

There exists a long-term need for foreign substrates on which to grow GaSb-based optoelectronic devices. We address this need by using interfacial misfit arrays to grow GaSb-based thermophotovoltaic cells directly on GaAs (001) substrates and demonstrate promising performance. We compare these cells to control devices grown on GaSb substrates to assess device properties and material quality. The room temperature dark current densities show similar characteristics for both cells on GaAs and on GaSb. Under solar simulation the cells on GaAs exhibit an open-circuit voltage of 0.121 V and a short-circuit current density of 15.5 mA/cm². In addition, the …