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Title: | Process variability in Cu2ZnSnSe4 solar cell devices: Electrical and structural investigations | Authors: | BRAMMERTZ, Guy Buffière, Marie Verbist, Christophe Oueslati, Souhaib Bekaert, Jonas ElAnzeery, Hossam Ben Messaoud, Khaled Sahayaraj, Sylvester Batuk, Maria Hadermann, Joke Koeble, Christine MEURIS, Marc POORTMANS, Jef |
Issue Date: | 2015 | Publisher: | IEEE | Source: | Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd | Series/Report: | IEEE Photovoltaic Specialists Conference | Abstract: | We have fabricated 9.7% efficient Cu2ZnSnSe4/CdS/ZnO solar cells by H2Se selenization of sequentially sputtered metal layers. Despite the good efficiency obtained, process control appears to be difficult. In the present contribution we compare the electrical and physical properties of two devices with nominal same fabrication procedure, but 1% and 9.7% power conversion efficiency respectively. We identify the problem of the lower performing device to be the segregation of ZnSe phases at the backside of the sample. This ZnSe seems to be the reason for the strong bias dependent photocurrent observed in the lower performing devices, as it adds a potential barrier for carrier collection. The reason for the different behavior of the two nominally same devices is not fully understood, but speculated to be related to sputtering variability. | Notes: | [Brammertz, Guy; Sahayaraj, Sylvester; Meuris, Marc] Imec Div IMOMEC Partner Solliance, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Brammertz, Guy; Sahayaraj, Sylvester; Meuris, Marc; Poortmans, Jozef] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. [Buffiere, Marie; Oueslati, Souhaib; ElAnzeery, Hossam; Ben Messaoud, Khaled; Poortmans, Jozef] Imec Partner Solliance, B-3001 Leuven, Belgium. [Buffiere, Marie; Sahayaraj, Sylvester; Poortmans, Jozef] Katholieke Univ Leuven, Dept Elect Engn ESAT, B-3001 Heverlee, Belgium. [Verbist, Christophe; Batuk, Maria; Hadermann, Joke] Univ Antwerp, Electrton Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium. [Oueslati, Souhaib; ElAnzeery, Hossam; Ben Messaoud, Khaled] KACST Intel Consortium Ctr Excellence Nanomfg App, Riyadh, Saudi Arabia. [Oueslati, Souhaib] Fac Sci Tunis, Dept Phys, El Manar, Tunisia. [Bekaert, Jonas] Univ Antwerp, Dept Phys, B-2020 Antwerp, Belgium. [ElAnzeery, Hossam] Nile Univ, Microelect Syst Design Dept, Cairo, Egypt. [Ben Messaoud, Khaled] Univ Tunis El Manar, Fac Sci Tunis, Unite Phys Dispositifs Semicond, Tunis 2092, Tunisia. [Koeble, Christine] Helmholtz Zentrum Berlin Mat & Energie GmbH, D-14109 Berlin, Germany. | Keywords: | Kesterite; solar cells; Cu2ZnSnSe4; process control;Cu2ZnSnSe4; Kesterite; process control; solar cells | Document URI: | http://hdl.handle.net/1942/21804 | ISBN: | 9781479979448 | DOI: | 10.1109/PVSC.2015.7355797 | ISI #: | 000369992900207 | Rights: | © 2015 IEEE | Category: | C1 | Type: | Proceedings Paper | Validations: | ecoom 2017 |
Appears in Collections: | Research publications |
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