A very revealing study about a cost analysis of PSC Tandem...

A very revealing study about a cost analysis of PSC Tandem Photovoltaics. A LCOE comparison between silicon solar cells, perovskite solar cells, perovskite/silicon tandem solar cells and perovskite/perovskite tandem solar cells.

Conclusions:
In conclusion, we investigated four solar modules (e.g., silicon solar cells, perovskite solar cells, perovskite/silicon tandem solar cells and perovskite/perovskite tandem Figure 6. The LCOE Decrease Rate of Module Lifetime and Efficiency (A and B) The LCOE decrease rate changing with (A) the lifetime and (B) the module efficiency. The solid line represents the current value given by previous research and the dotted line represents the estimated value when the module efficiency and the lifetime are improved in the future. The LCOE decrease rate around 0.10 US cents kWh1 is magnified in the insets. Joule 2, 1–14, August 15, 2018 9 Please cite this article in press as: Li et al., Cost Analysis of Perovskite Tandem Photovoltaics, Joule (2018), https://doi.org/10.1016/ j.joule.2018.05.001 solar cells) with major emphasis on their LCOE and relevant contributors. The proposed tandem structures show great commercial potential if their performance (PCE and lifetime) on lab scale can be achieved after scaling up with low-cost materials with a satisfactory material utilization ratio. We adopted the bottom-up cost model to estimate the manufacturing cost and subsequently the LCOE of each module based on current progress and assumptions. We conclude (1) single-junction perovskite solar cells are promising to achieve a competitive LCOE in the PV market; (2) tandem PVs by incorporation of perovskite absorbers are capable of lowering the LCOE effectively due to the extremely low manufacturing cost and high efficiency of perovskite sub-cells; (3) a significant decrease in the LCOE can be achieved by improving the lifetime and the efficiency of solar modules; and (4) LCOE decrease rates are defined and investigated for the first time, and demonstrated to serve as a yardstick to measure the effectiveness regarding the research direction for PV development. In our analysis, the single-junction perovskite PV shows a lower LCOE than that of the c-silicon/perovskite tandem device. However, the latter may face less barriers when penetrating the market by potentially leveraging the established PV industry. Although the current analysis indicates that perovskite PVs have great potential from a technoeconomic perspective, they are still far from practical use; the assumed device performance has not been fully achieved yet. It calls for further efforts to simultaneously improve the efficiency and lifetime of perovskite modules, which will ultimately improve the competitiveness of perovskite PVs over the entire energy sector.

https://www.cell.com/joule/pdfExtended/S2542-4351(18)30191-0

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