Journal
ADVANCED ENERGY MATERIALS
Volume 10, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201902840
Keywords
efficiency; electrical simulation; monolithic; optical simulation; perovskite; Si tandem
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Funding
- Australian Government through the Australian Renewable Energy Agency (ARENA) [MG005]
- Australian Research Council [FT13010916]
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The article commences with a review focusing on three critical aspects of the perovskite/Si tandem technology: the evolution of efficiencies to date, comparisons of Si subcell choices, and the interconnection design strategies. Building on this review, a clear route is provided for minimizing optical losses aided by optical simulations of a recently reported high-efficiency perovskite/Si tandem system, optimizations which result in tandem current densities of approximate to 20 mAcm(-2) with front-side texture. The primary focus is on electrical modeling on the Si-subcell, in order to understand the efficiency potential of this cell under filtered light in a tandem configuration. The possibility of increasing the Si subcell efficiency by 1% absolute is offered through joint improvements to the bulk lifetime, which exceeds 4 ms, and improves surface passivation quality to saturation current densities below 10 fA cm(-2). Polycrystalline-Si/SiOx passivating contacts are proposed as a promising alternative to partial-area rear contacts, with the potential for further simplifying cell fabrication and improving device performance. A combination of optical modeling of the complete tandem structure alongside electrical modeling of the Si-subcell, both with state-of-the-art modeling tools, provides the first complete picture of the practical efficiency potential of perovskite/Si tandems.
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