Phase Distributions and Local Bandgap Energies in Mixed-Halide Perovskite Nanoparticles

Dan R. Wargulski, Tal Binyamin, Katrina Coogan, Benedikt Haas, Christoph Koch, Lioz Etgar, Daniel Abou-Ras

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Monochromated, aberation-corrected scanning transmission electron microscopes enable the investigation of chemical distribution and optical properties such as the bandgap energy. We conducted valence and core electron energy-loss spectroscopy on nanoparticles made of the inorganic double-halide perovskites CsPb(IxBr1-x)3 (x=0-1) to investigate the distribution of halogen anions as well as Cs and Pb cations inside the nanoparticles and correlated the results with bandgap energy mappings. Changes of the chemical distribution with continuous electron beam irradiation were observed.

Original languageAmerican English
Title of host publication2023 IEEE 50th Photovoltaic Specialists Conference, PVSC 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665460590
DOIs
StatePublished - 2023
Event50th IEEE Photovoltaic Specialists Conference, PVSC 2023 - San Juan, United States
Duration: 11 Jun 202316 Jun 2023

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Conference

Conference50th IEEE Photovoltaic Specialists Conference, PVSC 2023
Country/TerritoryUnited States
CitySan Juan
Period11/06/2316/06/23

Bibliographical note

Publisher Copyright:
© 2023 IEEE.

Keywords

  • core-loss EELS
  • halide perovskites
  • monochromated STEM
  • nanoparticles
  • photovoltaic
  • valence-loss EELS

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