Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/45433
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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