Quantifying the performance gain of 6-inch bifacial 4T pk-Si tandem modules
conference paper
In order to further reduce the LCOE of PV, the conversion efficiency must increase beyond the practical limit of silicon technology (26% [1]). It is believed that tandem module technology, combining bottom c-Si cells with low-cost thin-film top cells, can overcome the silicon limit. Recently, bifacial glass/glass modules are gaining market share because of the increased module power output of 15-20% from the rear illumination. In this concept, the glass-glass configuration gains one the assurance of long-term reliability in exchange for the added weight of the module. Therefore, the minimum efficiency target of tandem modules should consider the energy yield of bifacial c-Si modules as ‘competition’ and therefore aim for power output densities >30 mW/cm2. Additionally, tandem modules should demonstrate same reliability, bankability and competitive cost compared to commercial PV modules. 4T bifacial tandem modules combine the best of two worlds: tandem for best spectrum utilization, and bifaciality for highest module power. [2,3]
TNO Identifier
957229
Source title
EU PVSECC 2021; European PV Solar Energy Conference and Exhibition
Pages
1-8
Files
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