Advanced Characterization Methods for the Analysis of Electrical Losses in Perovskite/Silicon Tandem Solar Cells
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Beschreibung
Photovoltaics enable large-scale generation of clean electricity. Multi-junction solar cells allow increasing power conversion efficiency significantly, reducing land and resource demand.
This work introduces novel, rapid, and spatially resolved characterization methods for a comprehensive electrical loss analysis of perovskite/silicon tandem solar cells, focusing on short-circuit current, open-circuit voltage, and fill factor. The quick spectrometric characterization enables the investigation of subcell currents within minutes. Lock-in thermography and photoluminescence measurements allow identifying local defects and spatial patterns in dual- and triple-junction solar cells. The luminescence-based implied open-circuit voltage imaging technique reveals local voltage losses. The Suns-VOC and Suns-PL imaging methods are adapted for tandem cells to quantify transport losses. The photoluminescence-based series resistance imaging can uncover spin-coating-induced defects and allows quantification of the corresponding electric losses. Collectively, this work provides essential methods for targeted development of high-efficiency perovskite/silicon multi-junction photovoltaics.
Autor*in
Oliver Fischer
Themen in »Advanced Characterization Methods for the Analysis of Electrical Losses in Perovskite/Silicon Tandem Solar Cells«
perovskite/silicon tandem solar cell electrical loss analysis current-voltage characteristic spatially resolved loss analysis photoluminescence imaging Photovoltaikforscher