First Proof-of-Principle of Inorganic Lead Halide Perovskites Deposition by Magnetron-Sputtering

• Main Authors: Claudia Borri, Nicola Calisi, Emanuele Galvanetto, Naomi Falsini, Francesco Biccari, Anna Vinattieri, Giuseppe Cucinotta, Stefano Caporali
• Format: Article
• Language: English
• Published: MDPI AG 2019-12-01
• Series: Nanomaterials
• Subjects: perovskite; thin-film; magnetron-sputtering; caesium lead halides
• Online Access: https://www.mdpi.com/2079-4991/10/1/60

The present work reports the application of RF-magnetron sputtering technique to realize CsPbBr<inline-formula> <math display="inline"> <semantics> <msub> <mrow></mrow> <mn>3</mn> </msub> </semantics> </math> </inline-formula> 70 nm thick films on glass substrate by means of a one-step procedure. The obtained films show highly uniform surface morphology and homogeneous thickness as evidenced by AFM and SEM investigations. XRD measurements demonstrate the presence of two phases: a dominant orthorhombic CsPbBr<inline-formula> <math display="inline"> <semantics> <msub> <mrow></mrow> <mn>3</mn> </msub> </semantics> </math> </inline-formula> and a subordinate CsPb<inline-formula> <math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula>Br<inline-formula> <math display="inline"> <semantics> <msub> <mrow></mrow> <mn>5</mn> </msub> </semantics> </math> </inline-formula>. Finally, XPS data reveals surface bromine depletion respect to the stoichiometrical CsPbBr<inline-formula> <math display="inline"> <semantics> <msub> <mrow></mrow> <mn>3</mn> </msub> </semantics> </math> </inline-formula> composition, nevertheless photoluminescence spectroscopy results confirm the formation of a highly luminescent film. These preliminary results demonstrate that our approach could be of great relevance for easy fabrication of large area perovskite thin films. Future developments, based on this approach, may include the realization of multijunction solar cells and multicolor light emitting devices.