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Title: | Li-Doping and Ag-Alloying Interplay Shows the Pathway for Kesterite Solar Cells with Efficiency Over 14% | Authors: | Gong, YC Jimenez-Arguijo, A Medaille, AG Moser, S Basak, A SCAFFIDI, Romain Carron, R Flandre, D VERMANG, Bart Giraldo, S Xin, H Perez-Rodriguez, A Saucedo, E |
Issue Date: | 2024 | Publisher: | Source: | Advanced functional materials, 34 (42) (Art N° 2404669) | Abstract: | Kesterite photovoltaic technologies are critical for the deployment of light-harvesting devices in buildings and products, enabling energy sustainable buildings, and households. The recent improvements in kesterite power conversion efficiencies have focused on improving solution-based precursors by improving the material phase purity, grain quality, and grain boundaries with many extrinsic doping and alloying agents (Ag, Cd, Ge…). The reported progress for solution-based precursors has been achieved due to a grain growth in more electronically intrinsic conditions. However, the kesterite device performance is dependent on the majority carrier density and sub-optimal carrier concentrations of 10 14-10 15 cm −3 have been consistently reported. Increasing the majority carrier density by one order of magnitude would increase the efficiency ceiling of kesterite solar cells, making the 20% target much more realistic. In this work, LiClO 4 is introduced as a highly soluble and highly thermally stable Li precursor salt which leads to optimal (>10 16 cm −3) carrier concentration without a significant impact in other relevant optoelectronic properties. The findings presented in this work demonstrate that the interplay between Li-doping and Ag-alloying enables a reproducible and statistically significant improvement in the device performance leading to efficiencies up to 14.1%. | Keywords: | Cu2ZnSn(S,Se)4;CZTSSe;kesterite solar cells;molecular inks route;thin film chalcogenides | Document URI: | http://hdl.handle.net/1942/45433 | ISSN: | 1616-301X | e-ISSN: | 1616-3028 | DOI: | 10.1002/adfm.202404669 | ISI #: | WOS:001241163800001 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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Adv Funct Materials - 2024 - Gong - Li‐Doping and Ag‐Alloying Interplay Shows the Pathway for Kesterite Solar Cells with.pdf | Published version | 2.4 MB | Adobe PDF | View/Open |
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