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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/24973

Title: Optoelectronic properties of thin film Cu2ZnGeSe4 solar cells
Authors: Sahayaraj, S.
Brammertz, Guy
Vermang, B.
Schnabel, T.
Ahlswede, E.
Huang, Z.
Ranjbar, S.
Meuris, Marc
Vleugels, J.
Poortmans, J.
Issue Date: 2017
Abstract: The fabrication and properties of a Ge-based Kesterite Cu2ZnGeSe4 (CZGSe) solar cell are discussed. The existence of the quaternary compound has been verified by physical methods such as X Ray Diffraction (XRD) and Energy Dispersive Spectroscopy (EDS). The Cu2ZnGeSe4 solar cell has a power conversion efficiency (PCE) of 5.5% under AM1.5G illumination which is among the highest reported for pure Ge substitution. Detailed low temperature current-voltage and time-resolved photoluminescence measurements show that the Cu2ZnGeSe4 absorber has less bulk defects and less band tailing in contrast to the typical characteristics of Cu2ZnSnSe4 devices. These beneficial opto-electronic properties also resulted in a high open circuit voltage (V-OC,) of 744 mV which is amongst the highest values reported for Kesterite Materials.
Notes: [Sahayaraj, S.; Brammertz, G.; Ranjbar, S.; Meuris, M.] IMOMEC, Imec Div, Partner Solliance, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Sahayaraj, S.; Brammertz, G.; Ranjbar, S.; Meuris, M.] Hasselt Univ, Partner Solliance, Inst Mat Res IMO, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Vermang, B.; Poortmans, J.] IMEC, Partner Solliance, Kapeldreef 75, B-3001 Leuven, Belgium. [Sahayaraj, S.; Poortmans, J.] Katholieke Univ Leuven, Dept Elect Engn, Kasteelpk Arenberg 10, B-3001 Heverlee, Belgium. [Huang, Z.] Univ Luxembourg, Lab Photovolta, Rue Brill 41, L-4422 Belvaux, Luxembourg. [Ranjbar, S.] Univ Aveiro, Dept Fis, I3N, Campus Univ Santiago, P-3810193 Aveiro, Portugal. [Schnabel, T.; Ahlswede, E.] Forsch Baden Wurttemberg, Zentrum Sonnenenergie, D-70565 Stuttgart, Germany. [Vleugels, J.] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Heverlee, Belgium.
URI: http://hdl.handle.net/1942/24973
DOI: 10.1016/j.solmat.2017.06.050
ISI #: 000408298300017
ISSN: 0927-0248
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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