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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/26295

Title: Alkali Assisted Reduction of Open-Circuit Voltage Deficit in CZTSe Solar Cells
Authors: Garud, Siddhartha
Vermang, Bart
Sahayaraj, Sylvester
Ranjbar, Samaneh
Brammertz, Guy
Meuris, Marc
Smets, Arno
Poortmans, Jef
Issue Date: 2017
Citation: Gordon, Krc; Slaoui, I.; Niki, A.; Conibeer, S.; Ribierre, G.; Moreels, J.C.; Climente, I.; Andre, J.I.; Reece, P.; Hildebrandt, S. (Ed.). Physica Status Solidi C-Current Topics in Solid State Physics, WILEY-V C H VERLAG GMBH, (Art N° UNSP 1700171)
Series/Report: Physica Status Solidi C-Current Topics in Solid State Physics
Series/Report no.: 14(10)
Abstract: Pure selenide Cu2ZnSnSe4 solar cells were fabricated with a maximum achieved open-circuit voltage (V-OC) of 454 mV, which is on par with the highest known V-OC for this technology (Bourdais et al., Adv. Energ. Mater. 2016, 6). A simple, non-vacuum, spin coating technique was developed for the introduction of alkali ions (Li+, K+, Rb+) before two annealing steps. The presence of Rb and Li ions in particular, was observed to reduce recombination in the bulk and increase minority charge carrier decay time. This resulted in the reduction of the redshift in the photoluminescence peak from the bandgap and the V-OC deficit. Bandgap variations and electrostatic potential fluctuations in conduction and valence bands were investigated as aspects likely affected by alkali ions.
Notes: Garud, S (reprint author), Imec Partner Solliance, B-3000 Leuven, Belgium. sidd1101@gmail.com
URI: http://hdl.handle.net/1942/26295
DOI: 10.1002/pssc.201700171
ISI #: 000431703400012
ISSN: 1862-6351
Category: C1
Type: Proceedings Paper
Appears in Collections: Research publications

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