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- W4297052972 abstract "Interdigitated back contact (IBC) silicon solar cells with a passivating n‐type poly‐Si on oxide emitter and an aluminum‐doped p + base contact on M2‐sized Ga‐doped p‐type Cz wafers are reported. The Al‐doped base contact forms during the firing of the printed contacts and allows for a lean process flow. The device optimization balances recombination at the base contacts against resistive losses and respects constraints set by the need of interconnecting cells in a module and contacting the cells temporally by a measurement chuck. A special sample holder is designed for measuring the I sc –V oc curve of the IBC cell with a busbar‐less metal grid. The pseudo‐efficiency is 24.7%. All fingers of each polarity are connected with wires and an efficiency of 22.3% is measured. The comparison of simulations and measurements reveals that the cell has 23.4% efficiency without the series resistance losses due to the wires. A huge part of the resistive losses in the cell are the transport losses of the majorities in the base dissipating a power that corresponds to 0.76% abs efficiency and the resistive losses at the Al‐doped base contact (0.29% abs )." @default.
- W4297052972 created "2022-09-26" @default.
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- W4297052972 date "2022-09-23" @default.
- W4297052972 modified "2023-09-23" @default.
- W4297052972 title "Design of Large Poly‐Si on Oxide Interdigitated Back Contact (POLO IBC) Silicon Solar Cells with Local Al–p<sup>+</sup> Contacts in the Constraints of Measurement and Module Integration" @default.
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- W4297052972 doi "https://doi.org/10.1002/solr.202200583" @default.
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