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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 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | 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 | Keywords: | alkali; bandgap; kesterite; open-circuit voltage deficit; spin coating; tail-states | Document URI: | http://hdl.handle.net/1942/26295 | DOI: | 10.1002/pssc.201700171 | ISI #: | 000431703400012 | Rights: | © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | Category: | C1 | Type: | Proceedings Paper | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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