The Relationship between Chemical Flexibility and Nanoscale Charge Collection in Hybrid Halide Perovskites

Yanqi Luo, Sigalit Aharon, Michael Stuckelberger, Ernesto Magaña, Barry Lai, Mariana Bertoni, Lioz Etgar, David P. Fenning

Research output: Contribution to journalReview article

11 Scopus citations

Abstract

Hybrid organometal halide perovskites are known for their excellent optoelectronic functionality as well as their wide-ranging chemical flexibility. The composition of hybrid perovskite devices has trended toward increasing complexity as fine-tuned properties are pursued, including multielement mixing on the constituents A and B and halide sites. However, this tunability presents potential challenges for charge extraction in functional devices. Poor consistency and repeatability between devices may arise due to variations in composition and microstructure. Within a single device, spatial heterogeneity in composition and phase segregation may limit the device from achieving its performance potential. This review details how the nanoscale elemental distribution and charge collection in hybrid perovskite materials evolve as chemical complexity increases, highlighting recent results using nondestructive operando synchrotron-based X-ray nanoprobe techniques. The results reveal a strong link between local chemistry and charge collection that must be controlled to develop robust, high-performance hybrid perovskite materials for optoelectronic devices.

Original languageEnglish (US)
Article number1706995
JournalAdvanced Functional Materials
Volume28
Issue number18
DOIs
StatePublished - May 4 2018

Keywords

  • hybrid perovskites
  • mixed halides
  • nanoprobe X-ray fluorescence

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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