Synthesis of kesterite nanopowders with bandgap tuning ligands. Issue 9 (29th June 2015)

• Record Type: Journal Article
• Authors: Podsiadlo, Slawomir; Bialoglowski, Maciej; Fadaghi, Mohammad; Matyszczak, Grzegorz; Kardas, Kornelia; Dluzewski, Piotr; Data, Przemyslaw; Lapkowski, Mieczyslaw
• Is Part Of: Crystal research and technology. Volume 50:Issue 9/10(2015:Sep.)
• Page Start: 743
• Page End: 746
• Publication Date: 2015-06-29
• Subjects: photovoltaics -- semiconductor -- kesterite; Crystallography -- Periodicals; 548
• DOI: 10.1002/crat.201500044
• Languages: English
• ISSNs: 0232-1300

Abstract

Abstract : A novel method for synthesis of bandgap tunable inorganic‐organic heterojunctions has been elaborated. Bandgaps of CZTS nanocrystals conjugated with oleylamine and diphenylamine have been determined. The materials obtained seem to be apt for preparation of upper‐layers of cheap, sustainable and non‐toxic tandem solar cells. Abstract : A rapid development of solar cells has been observed within recent years. Semiconducting materials based on Cu2 ZnSnS4 with the kesterite structure offer a promise of low‐cost and environmentally friendly solar cells. The energy gap of Cu2 ZnSnS4, which is about 1.5 eV, can be optimized with addition of organic ligands. We report a method of obtaining kesterite nanopowders with grain diameter of approximately 5 nm via solution synthesis using metal chlorides and sulfur in oleylamine at 230 °C. The ligand exchange for diphenylamine upshifted the value of the bandgap to 2.2 eV, which makes it a promising material for an upper layer in tandem photovoltaic devices.