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Diffusion length of photo-generated charge carriers in layers and powders of CH3NH3PbI3 perovskite

Dittrich, Th ; Lang, F. ; Shargaieva, O. ; Rappich, J. ; Nickel, N. H. ; Unger, E. LU and Rech, B. (2016) In Applied Physics Letters 109(7).
Abstract

The diffusion or transport lengths of photo-generated charge carriers in CH3NH3PbI3 layers (thickness up to 1 μm) and powders have been directly measured with high accuracy by modulated surface photovoltage after Goodman. The values of the diffusion lengths of photo-generated charge carriers ranged from 200 nm to tenths of μm. In thin CH3NH3PbI3 layers, the transport lengths corresponded to the layer thickness whereas in thicker layers and in crystallites of CH3NH3PbI3 powders the grain size limited the diffusion length. For grains, the diffusion length of photo-generated charge carriers depended on the measurement conditions.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
109
issue
7
article number
073901
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85020989618
ISSN
0003-6951
DOI
10.1063/1.4960641
language
English
LU publication?
yes
id
db2e4fe7-57d1-4b37-82ee-6250701d87b2
date added to LUP
2020-01-19 14:54:25
date last changed
2020-09-30 06:32:16
@article{db2e4fe7-57d1-4b37-82ee-6250701d87b2,
  abstract     = {<p>The diffusion or transport lengths of photo-generated charge carriers in CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> layers (thickness up to 1 μm) and powders have been directly measured with high accuracy by modulated surface photovoltage after Goodman. The values of the diffusion lengths of photo-generated charge carriers ranged from 200 nm to tenths of μm. In thin CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> layers, the transport lengths corresponded to the layer thickness whereas in thicker layers and in crystallites of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> powders the grain size limited the diffusion length. For grains, the diffusion length of photo-generated charge carriers depended on the measurement conditions.</p>},
  author       = {Dittrich, Th and Lang, F. and Shargaieva, O. and Rappich, J. and Nickel, N. H. and Unger, E. and Rech, B.},
  issn         = {0003-6951},
  language     = {eng},
  month        = {01},
  number       = {7},
  publisher    = {American Institute of Physics (AIP)},
  series       = {Applied Physics Letters},
  title        = {Diffusion length of photo-generated charge carriers in layers and powders of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite},
  url          = {http://dx.doi.org/10.1063/1.4960641},
  doi          = {10.1063/1.4960641},
  volume       = {109},
  year         = {2016},
}