Mechanical properties of APbX3 (A = Cs or CH3NH3; X = i or Br) perovskite single crystals

Yevgeny Rakita, Sidney R. Cohen, Nir Klein Kedem, Gary Hodes, David Cahen

Research output: Contribution to journalArticlepeer-review

279 Scopus citations

Abstract

The remarkable optoelectronic and especially photovoltaic performance of hybrid organic-inorganic perovskite (HOIP) materials drives efforts to connect materials properties to this performance. From nano-indentation experiments on solution-grown single crystals we obtain elastic modulus and nano-hardness values of APbX 3 (A = Cs, CH3NH3; X = I, Br). The Young's moduli are ∼14, 19.5, and 16 GPa, for CH3NH3PbI3, CH3NH3PbBr3, and CsPbBr3, respectively, lending credence to theoretically calculated values. We discuss the possible relevance of our results to suggested self-healing, ion diffusion, and ease of manufacturing. Using our results, together with literature data on elastic moduli, we classified HOIPs amongst the relevant material groups, based on their elastomechanical properties.

Original languageEnglish
Pages (from-to)623-629
Number of pages7
JournalMRS Communications
Volume5
Issue number4
StatePublished - 16 Sep 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 Materials Research Society.

Funding

FundersFunder number
Engineering and Physical Sciences Research CouncilEP/P505550/1

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