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Revealing the ultrafast charge carrier dynamics in organo metal halide perovskite solar cell materials using time resolved THz spectroscopy.

Ponseca, Carlito LU and Sundström, Villy LU (2016) In Nanoscale 8(12). p.6249-6257
Abstract
Ultrafast charge carrier dynamics in organo metal halide perovskite has been probed using time resolved terahertz (THz) spectroscopy (TRTS). Current literature on its early time characteristics is unanimous: sub-ps charge carrier generation, highly mobile charges and very slow recombination rationalizing the exceptionally high power conversion efficiency for a solution processed solar cell material. Electron injection from MAPbI3 to nanoparticles (NP) of TiO2 is found to be sub-ps while Al2O3 NPs do not alter charge dynamics. Charge transfer to organic electrodes, Spiro-OMeTAD and PCBM, is sub-ps and few hundreds of ps respectively, which is influenced by the alignment of energy bands. It is surmised that minimizing defects/trap states is... (More)
Ultrafast charge carrier dynamics in organo metal halide perovskite has been probed using time resolved terahertz (THz) spectroscopy (TRTS). Current literature on its early time characteristics is unanimous: sub-ps charge carrier generation, highly mobile charges and very slow recombination rationalizing the exceptionally high power conversion efficiency for a solution processed solar cell material. Electron injection from MAPbI3 to nanoparticles (NP) of TiO2 is found to be sub-ps while Al2O3 NPs do not alter charge dynamics. Charge transfer to organic electrodes, Spiro-OMeTAD and PCBM, is sub-ps and few hundreds of ps respectively, which is influenced by the alignment of energy bands. It is surmised that minimizing defects/trap states is key in optimizing charge carrier extraction from these materials. (Less)
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author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanoscale
volume
8
issue
12
pages
6249 - 6257
publisher
Royal Society of Chemistry
external identifiers
  • pmid:26763720
  • wos:000372851500005
  • scopus:84962276217
  • pmid:26763720
ISSN
2040-3372
DOI
10.1039/c5nr08622a
language
English
LU publication?
yes
id
77a23473-e1c4-4415-a5cf-4375d8b84b48 (old id 8592093)
date added to LUP
2016-04-01 09:51:08
date last changed
2025-04-04 14:52:57
@article{77a23473-e1c4-4415-a5cf-4375d8b84b48,
  abstract     = {{Ultrafast charge carrier dynamics in organo metal halide perovskite has been probed using time resolved terahertz (THz) spectroscopy (TRTS). Current literature on its early time characteristics is unanimous: sub-ps charge carrier generation, highly mobile charges and very slow recombination rationalizing the exceptionally high power conversion efficiency for a solution processed solar cell material. Electron injection from MAPbI3 to nanoparticles (NP) of TiO2 is found to be sub-ps while Al2O3 NPs do not alter charge dynamics. Charge transfer to organic electrodes, Spiro-OMeTAD and PCBM, is sub-ps and few hundreds of ps respectively, which is influenced by the alignment of energy bands. It is surmised that minimizing defects/trap states is key in optimizing charge carrier extraction from these materials.}},
  author       = {{Ponseca, Carlito and Sundström, Villy}},
  issn         = {{2040-3372}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{12}},
  pages        = {{6249--6257}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Nanoscale}},
  title        = {{Revealing the ultrafast charge carrier dynamics in organo metal halide perovskite solar cell materials using time resolved THz spectroscopy.}},
  url          = {{http://dx.doi.org/10.1039/c5nr08622a}},
  doi          = {{10.1039/c5nr08622a}},
  volume       = {{8}},
  year         = {{2016}},
}