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Ultrafast Terahertz Photoconductivity of Bulk Heterojunction Materials Reveals High Carrier Mobility up to Nanosecond Time Scale.

Ponseca, Carlito LU ; Yartsev, Arkady LU orcid ; Wang, Ergang ; Andersson, Mats R ; Vithanage, Dimali LU and Sundström, Villy LU (2012) In Journal of the American Chemical Society 134(29). p.11836-11839
Abstract
The few-picosecond (ps) decay of terahertz (THz) photoconductivity typically observed for conjugated polymer:fullerene blends (at excitation fluencies ∼10(15) photons/cm(2) per pulse) is shown to be a result of charge pair annihilation for two polymer:PCBM blends. At a factor of 100 lower excitation density, the THz decay is in the hundreds of ps time scale, implying that very high carrier mobility (∼0.1 cm(2) V(-1) s(-1)) prevails for long time after charge formation, of importance for free charge formation in organic solar cells.
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the American Chemical Society
volume
134
issue
29
pages
4 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000306724500003
  • pmid:22747242
  • scopus:84864213087
  • pmid:22747242
ISSN
1520-5126
DOI
10.1021/ja301757y
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
51c5db2c-f4c0-4696-8e57-3728c291742e (old id 2967681)
date added to LUP
2016-04-01 13:49:10
date last changed
2023-09-17 05:44:08
@article{51c5db2c-f4c0-4696-8e57-3728c291742e,
  abstract     = {{The few-picosecond (ps) decay of terahertz (THz) photoconductivity typically observed for conjugated polymer:fullerene blends (at excitation fluencies ∼10(15) photons/cm(2) per pulse) is shown to be a result of charge pair annihilation for two polymer:PCBM blends. At a factor of 100 lower excitation density, the THz decay is in the hundreds of ps time scale, implying that very high carrier mobility (∼0.1 cm(2) V(-1) s(-1)) prevails for long time after charge formation, of importance for free charge formation in organic solar cells.}},
  author       = {{Ponseca, Carlito and Yartsev, Arkady and Wang, Ergang and Andersson, Mats R and Vithanage, Dimali and Sundström, Villy}},
  issn         = {{1520-5126}},
  language     = {{eng}},
  number       = {{29}},
  pages        = {{11836--11839}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of the American Chemical Society}},
  title        = {{Ultrafast Terahertz Photoconductivity of Bulk Heterojunction Materials Reveals High Carrier Mobility up to Nanosecond Time Scale.}},
  url          = {{http://dx.doi.org/10.1021/ja301757y}},
  doi          = {{10.1021/ja301757y}},
  volume       = {{134}},
  year         = {{2012}},
}