Pump‐probe spectroscopy in organic semiconductors: monitoring fundamental processes of relevance in optoelectronics

J Cabanillas‐Gonzalez, G Grancini… - Advanced …, 2011‏ - Wiley Online Library
In this review we highlight the contribution of pump‐probe spectroscopy to understand
elementary processes taking place in organic based optoelectronic devices. The techniques …

Photoconduction in amorphous organic solids

D Hertel, H Bässler - ChemPhysChem, 2008‏ - Wiley Online Library
Herein, we focus on the principles of photoconduction in random semiconductors—the key
processes being optical generation of charge carriers and their subsequent transport. This is …

Terahertz conductivity of thin gold films at the metal-insulator percolation transition

M Walther, DG Cooke, C Sherstan, M Hajar… - Physical Review B …, 2007‏ - APS
Terahertz time-domain spectroscopy is used to measure the complex conductivity of
nanometer-thick gold films evaporated on silicon substrates in the far-infrared spectral …

Observation of a transient decrease in terahertz conductivity of single-layer graphene induced by ultrafast optical excitation

G Jnawali, Y Rao, H Yan, TF Heinz - Nano letters, 2013‏ - ACS Publications
We have measured the terahertz frequency-dependent sheet conductivity and its transient
response following femtosecond optical excitation for single-layer graphene samples grown …

Observation of Negative Terahertz Photoconductivity in Large Area Type-II Dirac Semimetal

P Suo, H Zhang, S Yan, W Zhang, J Fu, X Lin, S Hao… - Physical Review Letters, 2021‏ - APS
As a newly emergent type-II Dirac semimetal, platinum telluride (PtTe 2) stands out from
other two dimensional noble-transition-metal dichalcogenides for the unique band structure …

Far-infrared response of free charge carriers localized in semiconductor nanoparticles

H Němec, P Kužel, V Sundström - Physical Review B—Condensed Matter and …, 2009‏ - APS
A Monte Carlo method is employed to calculate the dynamical conductivity in the terahertz
range of free charge carriers localized in semiconductor nanoparticles. The shape of the …

Influence of the Electron-Cation Interaction on Electron Mobility in Dye-Sensitized ZnO <?format ?>and Nanocrystals: A Study Using Ultrafast Terahertz …

H Němec, J Rochford, O Taratula, E Galoppini, P Kužel… - Physical review …, 2010‏ - APS
Charge transport and recombination in nanostructured semiconductors are poorly
understood key processes in dye-sensitized solar cells. We have employed time-resolved …

Ultrafast carrier dynamics in pentacene, functionalized pentacene, tetracene, and rubrene single crystals

O Ostroverkhova, DG Cooke, FA Hegmann… - Applied physics …, 2006‏ - pubs.aip.org
We measure the transient photoconductivity in pentacene, functionalized pentacene,
tetracene, and rubrene single crystals using optical pump-terahertz probe techniques. In all …

Terahertz probe of photoexcited carrier dynamics in the Dirac semimetal

W Lu, J Ling, F **u, D Sun - Physical Review B, 2018‏ - APS
The relaxation dynamics of photoexcited quasiparticles of three-dimensional (3D) Dirac
semimetals is vital towards their application in high-performance electronic and …

Ultrafast carrier dynamics in microcrystalline silicon probed by time-resolved terahertz spectroscopy

L Fekete, P Kužel, H Němec, F Kadlec, A Dejneka… - Physical Review B …, 2009‏ - APS
We present the results of optical-pump–terahertz probe experiments applied to a set of thin-
film microcrystalline silicon samples, with structures varying from amorphous to fully …