T. Roth

Determining the excess carrier lifetime in crystalline silicon thin-films by photoluminescence measurements (2009)

Rosenits, P., Roth, T., Warta, W., Reber, S., Glunz, S.W.

A valuable nondestructive measurement and analysis method for determining individual excess carrier lifetimes in multilayer systems is presented. This is particularly interesting for the...

Analysis of electrically active defects in silicon for solar cells (2009)

Roth, T.

Illumination-induced errors associated with suns-VOC measurements of silicon solar cells (2009)

Roth, T., Hohl-Ebinger, J., Grote, D., Schmich, E., Warta, W., Glunz, S.W., ...

I-SC-V-OC curves measured by the suns-V-OC method are widely used for solar cell characterization due to its being unaffected by series resistance effects. A common setup for this measurement system...

Potenziale der Anwendung und Steuerung von Servopressen (2009)

Neugebauer, R., Blau, P., Arnold, B., Wabner, M., Roth, T.

Die aktuellen Entwicklungstrends in der Blechumformung wie die zunehmende Bauteilkomplexität oder der Einsatz neuer, schwerer umformbarer Werkstoffe führen zu steigenden Anforderungen an die...

Workbench (2008)

B. Bloom, P. Keyser, D. Kimelman, E. Nelson, W. Neuberger, T. Roth, ...

Collecting and organizing all of the architectural information for a system is a challenge faced by information technology (IT) architects. Transforming that information into models of a viable...

Electronic properties of titanium in boron-doped silicon analyzed by temperature-dependent photoluminescence and injection-dependent photoconductance lifetime spectroscopy (2008)

Roth, T., Rüdiger, M., Warta, W., Glunz, S.W.

Temperature-dependent lifetime spectroscopy allows for the determination of defect parameters (like ratio of the carrier capture cross sections and energy level) of pointlike defects in silicon. This...

Hyperfine interactions in 61Ni with synchrotron-radiation-based perturbed angular correlations (2008)

I. Sergueev, O. Leupold, T. Roth, A.I. Chumakov, ...

Journal article

Improving the accuracy of suns-voc measurements using spectral mismatch correction (2008)

Roth, T., Hohl-Ebinger, J., Schmich, E., Warta, W., Glunz, S.W., Sinton, R. A.

ISC-VOC curves measured by the Suns-VOC method are widely used for solar cell characterization due to its unique feature of not being affected by series resistance effects. Although the accuracy of...

Titanium-related defect levels in silicon analyzed by temperature-dependent and injection-dependent photoluminescence lifetime spectroscopy (2008)

Roth, T., Rüdiger, M., Trupke, T., Glunz, S.W.

Temperature-dependent lifetime spectroscopy allows for the determination of defect parameters (like ratio of the carrier capture cross sections and energy level) of pointlike defects in silicon. This...

The ecology of vocal signaling: male spacing and communication distance of different song traits in nightingales (2008)

Naguib, M., Schmidt, R., Sprau, P., Roth, T., Florcke, C., Amrhein, V.

Comparison of photoconductance- and photoluminescence-based lifetime measurement techniques (2008)

Roth, T., Rosenits, P., Rüdiger, M., Warta, W., Glunz, S.W.

Accurate measurements of the injection-dependent excess carrier lifetime of silicon samples are essential for device optimization and controlling of solar cell processes. This excess carrier lifetime...

Novel Oxygen Selective Complexes for Optical Oxygen Sensing (2007)

Fernández-Sánchez, J. F., Roth, T., Cannas, R., Nazeeruddin, Md. K., Spichiger, S., Graetzel, M., ...

Electronic properties and dopant pairing behavior of manganese in boron-doped silicon (2007)

Roth, T., Rosenits, P., Diez, S., Glunz, S.W.

Boron-doped silicon wafers implanted with low doses of manganese have been analyzed by means of deep-level transient spectroscopy (DLTS), injection-dependent lifetime spectroscopy, and...

Spin-flip processes and ultrafast magnetization dynamics in Co - unifying the microscopic and macroscopic view of femtosecond magnetism (2006)

Cinchetti, M., Albaneda, M. Sánchez, Hoffmann, D., Roth, T., Krauß, M., ...

The femtosecond magnetization dynamics of a thin cobalt film excited with ultrashort laser pulses has been studied using two complementary pump-probe techniques, namely spin-, energy- and...

Rear-line-contacted silicon concentrator cells on highly and lightly doped substrates (2005)

Mohr, A., Roth, T., Hermle, M., Glunz, S.W.

Silicon concentrator cells in an one-axis tracking concentrator system with a concentration ratio of 300/spl times/ (2005)

Mohr, A., Roth, T., Epmeier, M., Glunz, S.W.

Progress on "CONMAN" EU R&D project - improvement of photovoltaic concentrating systems and technology transfer to a manufacturer (2005)

Browne, W., Wheldon, A., Norton, M., Iborra, A., Villlarejo, J., Jodar, E., ...

Controlled formation of weakly bound atomic negative ions by electron transfer from state-selected Rydberg atoms (1997)

Reicherts, M., Roth, T., Gopalan, A., Hotop, H., Desfrançuois, C., ...

Using crossed atomic beams and mass spectrometric ion detection we have studied the formation of negative Ca ions in slow collisions between laser-excited state-selected Ne**(ns; J = 2) and Ne** (nd;...

Lycobetaine acts as a selective topoisomerase IIβ poison and inhibits the growth of human tumour cells

Barthelmes, H U, Niederberger, E, Roth, T, Schulte, K, Tang, W C, Boege, F, ...

The phenanthridine alkaloid lycobetaine is a minor constituent of Amaryllidaceae. Inhibition of cell growth was studied in the clonogenic assay on 21 human tumour xenografts (mean IC 50 = 0.8 μM)....