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Contributions to conferences (Lenzer/Oum)

2019


Kentsch, R., Scholz, M., Horn, J., Schlettwein, D., Oum, K. and Lenzer, T., "Charge-carrier dynamics of the double perovskite Cs2AgBiBr6", Poster presentation, DPG-Frühjahrstagung, 31.3.-05.04. Regensburg (2019).

 

2018

Kentsch, R., "Lead-free perovskite-inspired materials for photovoltaics", Oral presentation, GDCh "Jungchemiker berichten", Siegen, 18 December (2018).  

Lenzer, T., "Charge carrier dynamics of lead-based and lead-free perovskite-inspired materials", Invited talk, MPI for Polymer Research, Mainz, 04 December (2018).

Merker, A., Scholz, M., Oum, K. and Lenzer, T., "Optical probing of charge carrier dynamics in layered SbI3" Oral presentation, 8th NRW-Nano Conference, Dortmund-Congress Center, 21.-22. November (2018).      Nrw-2018-AM-Vor6 

Scholz, M., Morgenroth, M., Oum, K. and Lenzer, T., "Energy conversion dynamics in the metal-deficient vacancy-ordered perovskite (CH3NH3)3Sb2I9" Poster presentation, 8th NRW-Nano Conference, Dortmund-Congress Center, 21.-22. November (2018).   Nrw-2018-Photo-MM   Nrw-2018-Group5  Nrw-2018-Photo-CO

Kentsch, R., Scholz, M., Horn, J., Schlettwein, D., Oum, K. and Lenzer, T., "Energy conversion in the double perovskite Cs2AgBiBr6", Poster presentation, 8th NRW-Nano Conference, Dortmund-Congress Center, 21.-22. November (2018). Nrw-2018-Photo-RK3  

Lenzer, T., "Understanding relaxation processes of charge carriers in perovskite-based thin film solar cell materials using femtosecond broadband transient absorption spectroscopy", Invited talk, Institut für Phys. Chem., Uni. Göttingen, 02.08. Göttingen (2018).

Oum, K., "Charge carrier dynamics in thin film materials for photovoltaics: Insight from ultrafast UV-Vis-NIR transient absorption spectroscopy", Invited talk, GDCh-Siegen, 19.06. Siegen (2018).

Scholz, M., Morgenroth, M., Oum, K. and Lenzer, T., "Exciton and coherent phonon dynamics in BiI3 and the metal-deficient vacancy-ordered perovskite (CH3NH3)3Sb2I9", Oral presentation, Bunsentagung, 10.-12. May, Hannover (2018).

Scholz, M., Flender, O., Lenzer, T. and Oum, K., "Ultrafast excited-state dynamics of capsanthin and citranaxanthin", Poster presentation, Bunsentagung, 10.-12. May, Hannover (2018).

Wirtz, M., Jung, G., Klein, R. K., Scholz, M. and Oum, K., "Controlling excited-state properties of styryl-BODIPY chromophores by changing from α- to β-substitution", Poster presentation, Bunsentagung, 10.-12. May, Hannover (2018).

 

2017

Klein, J. R., Scholz, M., Oum, K. and Lenzer, T.,"Ultrafast carrier dynamics of lead halide perovskites in contact with hole transport materials and mesoporous TiO2", Poster presentation, PSCO 2017, Oxford, 18-21 September (2017).

Klein, J. R., Scholz, M., Oum, K. and Lenzer, T.,"Ultrafast carrier dynamics of the perovskite CH3NH3PbI3 on mesoporous titania scaffolds in contact with hole transport materials", Oral presentation; Scholz, M., Flender, O., Oum, K. and Lenzer, T., "Excited-state relaxation of triarylamine solar cell dyes in organic solvents and on mesoporous Al2O3 and TiO2 thins films", Oral presentation; Flender, O., Scholz, M., Oum, K. and Lenzer, T., "A comprehensive kinetic model for the excited state dynamics of all-trans retinal", Oral presentation, ICP 2017, Straßburg, 16-21 July (2017). 2017-ICP-MS

Scholz, M., Flender, O., Oum, K. and Lenzer, T. "Ultrafast excited state dynamics of all-trans capsanthin", Oral presentation; Flender, O., Scholz, M., Oum, K. and Lenzer, T., "A comprehensive kinetic model for the excited state dynamics of all-trans retinal", Poster presentation, International carotenoid symposium, Luzern, 10-14 July (2017)

Klein, J. R., Scholz, M., Oum, K. and Lenzer, T.,"Ultrafast carrier dynamics of the perovskite CH3NH3PbI3 on mesoporous titania scaffolds in contact with hole transport materials", Oral presentation; Scholz, M., Flender, O., Oum, K. and Lenzer, T., "Electron and hole transfer processes of triarylamine solar cell dyes bound to mesoporous TiO2, ZnO and Al2O3 thins films studied by femtosecond UV-Vis-NIR spectroscopy", Oral presentation; Klein, J. R., Scholz, M., Oum, K. and Lenzer, T., "Dynamics of a solar cell hole transport material on mesoporous TiO2 and Al2O3 thin films and in organic solvents", Poster presentation, Bunsentagung, Kaiserslautern, 25-27 May (2017).

Lenzer, T., "Ultrafast transient absorption spectroscopy of organic-inorganic hybrid perovskites on mesoporous titanium dioxide in contact with hole transport materials", Invited talk, "Fundamentals of Perovskite Photovoltaics", Session CPP, DPG-Frühjahrstagung, 19-23 March, Dresden (2017).

Lenzer, T., "Charge carrier dynamics of organic-inorganic hybrid perovskites", Invited talk, "Hybrid Perovskites in Photovoltaics", LaMa-Kolloquium, Gießen, 17 February (2017).

 

 

2016

Oum, K. and Lenzer, T.

Ultrafast energy conversion in artificial and natural photopigment systems: Part A: "Femtosecond UV-Vis-NIR spectroscopy tracks electron and hole transfer processes of solar cell dyes"; Part B: "A comprehensive kinetic model for the excited state dynamics of all-trans retinal"

Invited "Tandem"-Presentation, DON-Seminar, IPCMS, Strassbourg, 5 December (2016).

Klein, J. R.

Ultrafast charge carrier dynamics of perovskite solar cell

Oral presentation, GDCh "Jungchemiker berichten", Siegen, 6 December (2016).

Klein, J. R., Flender, O., Scholz, M., Oum, K. and Lenzer, T.

Cooling and recombination dynamics of charge carriers in (MAI)x(PbI2)1-x (x=0.32-0.90)

Poster presentation, 2nd International Conference on Perovskite Solar Cells and Optoelectronics, Genova, 26-29 September (2016).

Flender, O., Klein, J. R., Scholz, M., Oum, K. and Lenzer, T.

Charge carrier dynamics of triarylamine and indoline dyes attached to mesoporous TiO2, ZnO and Al2O3 surfaces

Poster presentation, International Conference on Charge Carrier Dynamics at the Nanoscales, Berlin, 12-13 September (2016).

Klein, J. R., Flender, O., Scholz, M., Oum, K. and Lenzer, T.

Charge carrier dynamics of methylammonium lead iodide perovskites (MAI)x(PbI2)1-x (x=0.32-0.90)

Oral presentation, International Conference on Charge Carrier Dynamics at the Nanoscales, Berlin, 12-13 September (2016).

Flender, O., Scholz, M., Hölzer, J., Oum, K. and Lenzer, T.

A comprehensive kinetic model for the excited state dynamics of all-trans retinal

Oral presentation, Bunsentagung, Rostock, 5-7 May (2016).

Klein, J. R., Flender, O., Scholz, M., Oum, K. and Lenzer, T.

Charge carrier dynamics of methylammonium lead iodide: From PhI2-rich to low-dimensional broadly emitting perovskites

Oral presentation, Bunsentagung, Rostock, 5-7 May (2016).

Flender, O., Klein, J. R., Scholz, M., Oum, K. and Lenzer, T.

Electron transfer dynamics ofindoline and triarylamine sensitizers on mesoporous ZnO, TiO2, and Al2O3 surfaces

Poster presentation, Bunsentagung, Rostock, 5-7 May (2016). 

 

2015

Oum, K.

UV-VIS Broadband Transient Absorption Studies of Apocarotenals 

Oral presentation, International Bunsen Discussion meeting "Nonadiabatic effects in chemical kinetics, dynamics and spectroscopy", Göttingen, 1-4 November(2015).

Lenzer, T.

Ultrafast Charge Carrier Dynamics at sensitized Semiconductor oxide Interfaces of Solar Cells

Oral presentation, International Bunsen Discussion Meeting "Nonadiabatic effects in chemical kinetics, dynamics and spectroscopy", Göttingen, 1-4 November (2015).

Lenzer, T. and Oum, K.

Transient broadband absorption spectroscopy of zero- and small-bandgap semiconductor materials

Oral presentation, Research Seminar ULTRA, Kassel, 6 October (2015).

Flender, O., Klein, J. R., Oum, K. and Lenzer, T.

Ultrafast carrier dynamics of the organolead trihalide perovskite CH3NH3PbI3 on mesoporous TiO2

Poster presentation, 1st International Conference on Perovskite Solar Cells and Optoelectronics, Lausanne, 27-29 September (2015).

Ehlers, F., Scholz, M., Schimpfhauser, J., Bienert, J., Oum, K. and Lenzer, T.

Ultrafast excited state dynamics of apocarotenals: Identifysing the S* state with vibrationally excited molecules in the ground electronic state S0*

Poster presentation, The Hamburg conference on Femtochemistry "Femto 12", Hamburg, 12-17 July (2015).

Flender, O., Klein, J. R., Scholz, M., Oum, K. and Lenzer, T.

Ultrafast carrier dynamics of the organolead trihalide perovskite CH3NH3PbI3 on mesoporous TiO2

Poster presentation, The Hamburg conference on Femtochemistry "Femto 12", Hamburg, 12-17 July (2015).

Ehlers, F., Scholz, M., Schimpfhauser, J., Bienert, J., Oum, K. and Lenzer, T.

Collisional relaxation of apocarotenals: Identifysing the S* state with vibrationally excited molecules in the ground electronic state S0*

Poster presentation, Bunsentagung, Bochum, 14-16 May (2015).

Flender, O., Klein, J. R., Oum, K. and Lenzer, T.

Ultrafast carrier dynamics of the perovskite CH3NH3PbI3 on mesoporous TiO2 scaffolds

Poster presentation, Bunsentagung, Bochum, 14-16 May (2015). 

Klein, J. R., Flender, O., Oum, K. and Lenzer, T.

Transient optical response of organolead trihalde perovskites on different types of mesoporous oxide scaffolds

Poster presentation, Bunsentagung, Bochum, 14-16 May (2015). 

 

2014

Lenzer, T.

Ultrafast Charge Carrier Dynamics at dye-sensitized semiconductor oxide interfaces

Oral presentation, Physikalische Chemie Kolloquiuum-Universität Bonn, Bonn, 9 July (2014).


2013

Lenzer, T., Oum, K., Lohse, P. W., Flender, O., Klein, J. R., Scholz, M., Du, J., Oekermann, T.

Observation of a transient Stark effect for the indoline dye D149 on electrodeposited ZnO and sintered ZrO2 and TiO2 thin films

Oral presentation, Bunsentagung, Karlsruhe, 9-11 May (2013). 

Arden-Jacob, J., Drexhage, K. H., Flender, O., Lenzer, T., and Oum, K.

Ultrafast photoinduced dynamics of the 3,6-diamoniacridinium derivative ATTO 465 in liquids

Poster presentation, Bunsentagung, Karlsruhe, 9-11 May (2013). 

 

2012




2011

 

 

 

 

2010