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Artifacts in Absorption Measurements of Organometal Halide Perovskite Materials: What Are the Real Spectra?

Tian, Yuxi LU and Scheblykin, Ivan LU orcid (2015) In The Journal of Physical Chemistry Letters 6(17). p.3466-3470
Abstract
Organometal halide (OMH) perovskites have attracted lots of attention over the last several years due to their very promising performance as the materials for solar cells and light-emitting devices. Photophysical processes in these hybrid organic inorganic semiconductors are still heavily debated. To know precise absorption spectra is absolutely necessary for quantitative understanding of the fundamental properties of OMH perovskites. We show that to measure the absorption of perovskite materials correctly is a difficult task which could be easily overlooked by the community. Many of the published absorption spectra exhibit a characteristic step-like featureless shape due to light scattering, high optical density of individual perovskite... (More)
Organometal halide (OMH) perovskites have attracted lots of attention over the last several years due to their very promising performance as the materials for solar cells and light-emitting devices. Photophysical processes in these hybrid organic inorganic semiconductors are still heavily debated. To know precise absorption spectra is absolutely necessary for quantitative understanding of the fundamental properties of OMH perovskites. We show that to measure the absorption of perovskite materials correctly is a difficult task which could be easily overlooked by the community. Many of the published absorption spectra exhibit a characteristic step-like featureless shape due to light scattering, high optical density of individual perovskite crystals and poor coverage of the substrate. We show how to recognize these artifacts, to avoid them, and to use absorption spectra of films for estimation of the surface coverage ratio. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Letters
volume
6
issue
17
pages
3466 - 3470
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000360953300023
  • pmid:27120683
ISSN
1948-7185
DOI
10.1021/acs.jpclett.5b01406
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
id
8226ea62-3937-4c43-848a-e33151984e9b (old id 8077206)
date added to LUP
2016-04-01 13:24:11
date last changed
2022-04-05 21:38:39
@misc{8226ea62-3937-4c43-848a-e33151984e9b,
  abstract     = {{Organometal halide (OMH) perovskites have attracted lots of attention over the last several years due to their very promising performance as the materials for solar cells and light-emitting devices. Photophysical processes in these hybrid organic inorganic semiconductors are still heavily debated. To know precise absorption spectra is absolutely necessary for quantitative understanding of the fundamental properties of OMH perovskites. We show that to measure the absorption of perovskite materials correctly is a difficult task which could be easily overlooked by the community. Many of the published absorption spectra exhibit a characteristic step-like featureless shape due to light scattering, high optical density of individual perovskite crystals and poor coverage of the substrate. We show how to recognize these artifacts, to avoid them, and to use absorption spectra of films for estimation of the surface coverage ratio.}},
  author       = {{Tian, Yuxi and Scheblykin, Ivan}},
  issn         = {{1948-7185}},
  language     = {{eng}},
  number       = {{17}},
  pages        = {{3466--3470}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{The Journal of Physical Chemistry Letters}},
  title        = {{Artifacts in Absorption Measurements of Organometal Halide Perovskite Materials: What Are the Real Spectra?}},
  url          = {{http://dx.doi.org/10.1021/acs.jpclett.5b01406}},
  doi          = {{10.1021/acs.jpclett.5b01406}},
  volume       = {{6}},
  year         = {{2015}},
}