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9 March 2024 Investigation of hot carrier relaxation in type II systems via ensemble Monte Carlo simulation
Izak Baranowski, Dragica Vasileska, Ian R. Sellers, Hamidreza Esmaielpour, Stephen M. Goodnick
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Proceedings Volume PC12881, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XIII; PC128810C (2024) https://doi.org/10.1117/12.3008286
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
Type-II InAs/AlAsSb multi-quantum well (MQW) structures have seen usage in both quantum-cascade lasers and avalanche photodiodes. There has been recent interest in investigating this material system for next-generation photovoltaic applications, specifically hot carrier solar cells, due to the type-II offset spatially separating electrons and holes and the predicted high LO phonon lifetime. In order to successfully realize a hot carrier solar cell, the ultrafast relaxation process needs to be well understood. To investigate these effects, we simulated a MQW structure under both pulsed and continuous wave laser excitation with an Ensemble Monte Carlo (EMC) solver self-consistently coupled to a multi-valley non-parabolic Schrödinger/Poisson solver. The EMC includes intervalley scattering, carrier-carrier scattering, and nonequilibrium phonon effects.The EMC simulations show that the inhibited cooling is primarily due to a build up of LO phonons. We demonstrate good agreement with temperatures extracted via photoluminesce techniques.
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Izak Baranowski, Dragica Vasileska, Ian R. Sellers, Hamidreza Esmaielpour, and Stephen M. Goodnick "Investigation of hot carrier relaxation in type II systems via ensemble Monte Carlo simulation", Proc. SPIE PC12881, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XIII, PC128810C (9 March 2024); https://doi.org/10.1117/12.3008286
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KEYWORDS
Hot carriers
Monte Carlo methods
Phonons
Quantum systems
Solar cells
Data modeling
Laser scattering
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