Vapor deposition of CsPbBr3thin films by evaporation of CsBr and PbBr2

Iver J. Cleveland, Minh N. Tran, Anamika Dey, Eray S. Aydil

Research output: Contribution to journalArticlepeer-review

Abstract

Thin films of the inorganic halide perovskite, CsPbBr3, find applications in various optoelectronic devices, including solar cells, radiation detectors, light-emitting diodes, photodetectors, and lasers. Physical vapor deposition (PVD) by coevaporation of CsBr and PbBr2 onto a substrate is a scalable solventless approach to forming high purity large-grained polycrystalline films. Herein, we investigate the effects of deposition temperature, between 26 and 162 °C, and postdeposition annealing, between 250 and 350 °C, on the structure, texturing, and morphology of orthorhombic CsPbBr3 films formed by PVD. All films, regardless of the stable phase at the deposition temperature, transform to orthorhombic upon cooling to room temperature. The films deposited as orthorhombic or tetragonal CsPbBr3 below 130 °C were textured in the orthorhombic structure's ⟨202»direction, while cubic CsPbBr3 films deposited above 130 °C were textured in the orthorhombic structure's ⟨121»direction. This texturing favors the growth of high cation density planes of the stable phase at the deposition temperature. The orthorhombic ⟨202»texturing also dominates after annealing as long as the films have ⟨202»aligned grains before annealing.

Original languageEnglish (US)
Article number043415
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume39
Issue number4
DOIs
StatePublished - Jul 1 2021

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Fingerprint

Dive into the research topics of 'Vapor deposition of CsPbBr<sub>3</sub>thin films by evaporation of CsBr and PbBr<sub>2</sub>'. Together they form a unique fingerprint.

Cite this