Radiative Recombination Changes under Light-Soaking in CsPbBr3 Films on TiO2 and Insulating Glass Contacts: Interface versus Bulk Effects

Jiangang Hu, Laxman Gouda, Adi Kama, Shay Tirosh, Ronen Gottesman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The steady-state photoluminescence (PL) of CsPbBr3 films with varying thicknesses was studied under light-soaking on semiconductive and insulating contacts, showing reversible changes in PL, entirely dependent on the nature of the contact and film thicknesses. The PL at 50-100 nm CsPbBr3 on TiO2 increased, and decreased in thicker layers, with no thickness-dependent PL in CsPbBr3 on glass/Al2O3. These observations are described using a spatial charge distribution model which interprets the migration of Br- and VBr+ under light-soaking as suppressing electron injection into the TiO2 due to upward band bending, enhancing PL at the interface and nonradiative recombination further away from it.

Original languageAmerican English
Pages (from-to)3013-3016
Number of pages4
JournalACS Applied Energy Materials
Volume2
Issue number5
DOIs
StatePublished - 28 May 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

Keywords

  • CsPbBr perovskites
  • light-soaking effect
  • photoluminescence
  • solar cells
  • thin films

Fingerprint

Dive into the research topics of 'Radiative Recombination Changes under Light-Soaking in CsPbBr3 Films on TiO2 and Insulating Glass Contacts: Interface versus Bulk Effects'. Together they form a unique fingerprint.

Cite this