Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Asymmetric Cathodoluminescence Emission in CH3NH3PbI3-xBrx Perovskite Single Crystals
 
research article

Asymmetric Cathodoluminescence Emission in CH3NH3PbI3-xBrx Perovskite Single Crystals

Dar, M. Ibrahim  
•
Jacopin, Gwenole
•
Hezam, Mahmoud
Show more
2016
ACS PHOTONICS

Probing local emission properties of organic-inorganic lead halide perovskite material can provide evidence regarding the photovoltaic performance of perovskite solar cells. Herein, cathodoluminescence, which has the potential to resolve emission characteristics in the nanoregime, has been exploited to carry out temperature-dependent studies on individual well-faceted CH3NH3PbI3-xBrx perovskite single crystals. The spatial distribution of emission recorded at 4 and 300 K reveals that the periphery of the perovskite crystals radiates predominantly, which establishes that such an unusual emission characteristic is independent of the crystallographic phase of CH3NH3PbI3-xBrx crystals. Investigation based on scanning transmission electron microscopy coupled with energy dispersive X-ray spectroscopy deduces that the asymmetric cathodoluminescence is associated with the nonhomogeneous distribution of methylammonium cations in CH3NH3PbI3-xBrx single crystals. These results emphasize the unraveling of a correlation between the composition and spectroscopic properties of perovskite crystals in the nanoregime, which eventually can influence the overall photovoltaic performance of the devices based on them.

  • Details
  • Metrics
Type
research article
DOI
10.1021/acsphotonics.6b00290
Web of Science ID

WOS:000378195300007

Author(s)
Dar, M. Ibrahim  
Jacopin, Gwenole
Hezam, Mahmoud
Arora, Neha
Zakeeruddin, Shaik Mohammed
Deveaud, Benoit
Nazeeruddin, Mohammad Khaja
Gratzel, Michael
Date Issued

2016

Publisher

Amer Chemical Soc

Published in
ACS PHOTONICS
Volume

3

Issue

6

Start page

947

End page

952

Subjects

cathodoluminescence

•

CH3NH3PbI3-xBrx perovskite

•

single crystal

•

transmission electron microscopy

•

EDS mapping

•

INORGANIC HYBRID MATERIALS

•

SOLAR-CELLS

•

THIN-FILMS

•

LIGHT

•

PHOTOLUMINESCENCE

•

GAP

•

ORGANOMETAL HALIDE PEROVSKITES

Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
GMF  
Available on Infoscience
July 16, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/127200
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés