“With responsibility for the oversight of over 1,800 Megawatts of U.S. The partnership is expected to facilitate access for Maxeon to reach Omnidian’s C&I customers. Seattle-based Omnidian said it will bundle one year of its Shield plan for commercial systems larger than 250 kW sold by Maxeon, with the option to extend coverage for multiple years.
The IBC solar cells feature back contact energy conversion, allowing the entire front of the cell to absorb sunlight without any shading from metal ribbons like the ones found PERC cells. The move builds on Maxeon’s current presence in the US as a utility-scale solar developer. The company will sell its integrated back contact (IBC) solar panels with an attached performance assurance product from Omnidian. This dissertation contains both published and unpublished co-authored work.Maxeon Solar Technologies announced an expanded push in the US commercial and industrial (C&I) solar market, entering an agreement with performance and protection plan provider Omnidian. These insights will aid the rational design of IFLs for improved photovoltaic efficiencies. Further, operando measurements demonstrate the contribution of spiro-OMeTAD to broadly observed hysteresis behavior. The effects of additive t-BP on the J0 values also lend insight into unique chemistry when Co-TFSI is used, likely influencing its effect on Voc. The improvement in Voc from using spiro-OMeTAD in these cells, however, is not directly due to these changes but rather to increased electron collection asymmetry between the two contacts. Incorporating common dopants Li- and Co-TFSI and oxygen exposure increase J0p/J0n by up to 109. We define contact selectivity as the ratio of the two J0 values at one contact (e.g., J0p/J0n) while (J0nJ0p)0.5 describes contact recombination.Ĭompared to bare gold, adding spiro-OMeTAD reduces (J0nJ0p)0.5 by 104, passivating gold to recombination. This architecture creates a three-in-one photovoltaic that, with numerical simulation, provides equilibrium exchange current densities for electrons (J0n) and holes (J0p) as quantitative charge transfer rates. Specifically, the action of spiro-OMeTAD, the most common IFL used in perovskite solar cells, is characterized by making it a third contact to the interdigitated back-contact silicon solar cell. Further, these rates are related to the open-circuit voltage, an important photovoltaic performance metric, and definitions of selectivity and recombination developed by our group. This work addresses this gap by measuring both electron and hole transfer rates at IFL-modified contacts. While IFLs may improve efficiency, knowledge of their precise impact on electron and hole transfer at contacts and the relation of these effects to efficiency and well-defined concepts of selectivity and recombination is lacking, limiting photovoltaic technology development. Further, IFL/contact properties are conflated with performance parameters that depend on the entire cell. Improvements due to IFLs are often attributed to changes in qualitative ideas of selectivity and recombination. To increase efficiency, interfacial layers (IFLs) sandwiched between absorber and contact are frequently used. For example, the contacts of silicon and perovskite solar cells limit their performance. Solar cells require two primary components to function: an absorber and contacts, either of which may limit photovoltaic efficiency.
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