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|Title:||Surface Cleaning and Passivation Using (NH4)(2)S Treatment for Cu(In,Ga)Se-2 Solar Cells: A Safe Alternative to KCN||Authors:||Buffiere, Marie
El Mel, Abdel-Aziz
Zaghi, Armin E.
|Issue Date:||2015||Publisher:||WILEY-V C H VERLAG GMBH||Source:||ADVANCED ENERGY MATERIALS, 5 (6)||Abstract:||With the aim of developing a safe alternative to the KCN etchant for the removal of CuxSe secondary phases at the surface of Cu(In,Ga)Se-2 (CIGSe) absorber, a method based on ammonium sulfide (AS) chemical treatment is proposed. Although lower etching rates are observed compared with the KCN reference solution, the AS solution is found to selectively etch CuxSe phases. In addition, it allows modifying the surface chemical state of the CIGSe absorber by incorporation of sulfur. As a consequence, the minority carrier lifetime located close to the surface of the absorber is found to be improved. Furthermore, it is demonstrated that optimizing the AS treatment time induces a remarkable enhancement in the electrical performances of the CIGSe-based solar cells.||Notes:||[Buffiere, Marie; Lenaers, Nick; Zaghi, Armin E.; Poortmans, Jef] Imec Partner Solliance, B-3001 Leuven, Belgium. [Buffiere, Marie; Poortmans, Jef] Katholieke Univ Leuven, Dept Elect Engn ESAT, B-3001 Heverlee, Belgium. [El Mel, Abdel-Aziz] Univ Nantes, CNRS, Inst Mat Jean Rouxel, F-44322 Nantes 3, France. [Lenaers, Nick; Zaghi, Armin E.] Katholieke Univ Leuven, Dept Met & Mat Engn MTM, B-3001 Heverlee, Belgium. [Brammertz, Guy; Meuris, Marc] IMOMEC Partner Solliance, Imec Div, B-3590 Diepenbeek, Belgium. [Brammertz, Guy; Meuris, Marc] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium.||Keywords:||alternative selective etchants; chemical etching; thin films; secondary phases; solar cells;alternative selective etchants; chemical etching; thin films; secondary phases; solar cells||Document URI:||http://hdl.handle.net/1942/18814||ISSN:||1614-6832||e-ISSN:||1614-6840||DOI:||10.1002/aenm.201401689||ISI #:||000351613200010||Category:||A1||Type:||Journal Contribution||Validations:||ecoom 2016|
|Appears in Collections:||Research publications|
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