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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 ; 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.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the American Chemical Society
volume
134
issue
29
pages
11836 - 11839
publisher
The American Chemical Society
external identifiers
  • wos:000306724500003
  • pmid:22747242
  • scopus:84864213087
ISSN
1520-5126
DOI
10.1021/ja301757y
language
English
LU publication?
yes
id
51c5db2c-f4c0-4696-8e57-3728c291742e (old id 2967681)
date added to LUP
2012-09-10 11:17:02
date last changed
2017-11-19 03:50:14
@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},
  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},
  volume       = {134},
  year         = {2012},
}