Modeling of Minibands for Si/SC Quantum Dot Superlattice Solar Cells

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Silicon/silicon carbide quantum dot superlattice (Si / SiC QDSL) solar cells with aluminum oxide (Al2O3) passivation experimentally show high short-circuit current (Jsc) of 4.75 mA/cm2. Corresponding numerical result reveals that both the quantum enhancement on effective bandgap and the minimum transition energy play a critical role and get a close Jsc of 4.77 mA/cm2 under AM1.5 and one sun illumination. Conversion effi-ciency of 17.4% is then estimated by considering experimental QD geometries and a hexagonal QDSL with an inter-dot spacing of 0.3 nm.

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Journal: TechConnect Briefs
Volume: 2, Materials for Energy, Efficiency and Sustainability: TechConnect Briefs 2017
Published: May 14, 2017
Pages: 41 - 44
Industry sector: Energy & Sustainability
Topics: Solar Technologies
ISBN: 978-0-9975117-9-6