lunduniversity.lu.se

Denna sida på svenska This page in English

Marina Gerhard

Research Interests

I am interested in any kind of effect that turns a "good" semiconductor into a "bad" semiconductor, such as for example the presence of disorder or non-radiative decay channels. Optical spectroscopy can be a very sensitive probe to these processes and combined with a microscope we can study them with high spatial resolution beyond the ensemble-averaged behavior. Particular research areas are:

  • Fundamental processes in organo-metal halide perovskites
  • Charge separation and loss mechanisms in organic photovoltaics
  • The influence of morphology on the performance of polymer-based solar cells

Current research project

Understanding non-radiative decay processes and photoluminescence blinking in perovskite nanocrystals - What is the role of temperature?

Former projects

Photoexcitation dynamics and disorder effects in organic donor/acceptor systems probed by field- and temperature dependent time-resolved photoluminescence  (PhD thesis)

Characterization of photoconductive antennas via terahertz time domain spectroscopy (master project)

Selected Publications

----------------------------------------------------------------------------------------------------

Title: "Field-induced exciton dissociation in PTB7-based organic solar cells"

Authors: Gerhard, M., Arndt, A. P., Bilal, M.,  Lemmer, U., Koch, M., Howard, I. A.

Journal: Physical Review B

Year: 2017

doi: 10.1103/PhysRevB.95.195301

----------------------------------------------------------------------------------------------------

Title: "Time-resolved photoluminescence spectroscopy of charge transfer states in blends of pentacene and perfluoropentacene"

Authors: Broch, K., Gerhard, M., Halbich, M., Lippert, S., Belova, V., Koch, M., Schreiber, F.

Journal: Physica Status Solidi (Rapid Research Letters)

Year: 2017

doi: 10.1002/pssr.201700064

----------------------------------------------------------------------------------------------------

Title: "Identifying Charge-Transfer states in Polymer:Fullerene Heterojunctions by Their Emission Polarization Anisotropy"

Authors: Arndt, A. P., Gerhard, M., Koch, M., Lemmer, U., Howard, I. A.

Journal: The Journal of Physical Chemistry C

Year: 2017

doi: 10.1021/acs.jpcc.6b12853

----------------------------------------------------------------------------------------------------

Title: "Temperature and Energy-Dependent Separation of Charge-Transfer States in PTB7-Based Organic Solar Cells"

Authors: Gerhard, M., Arndt, A. P., Howard, I. A., Rahimi-Iman, A., Lemmer, U., Koch, M.

Journal: The Journal of Physical Chemistry C

Year: 2015

doi: 10.1021/acs.jpcc.5b09842

----------------------------------------------------------------------------------------------------

 Title: "Time-Resolved Charge-Transfer State Emission in Organic Solar Cells: Temperature and Blend Composition Dependence of Interfacial Traps"

Authors: Arndt, A. P., Gerhard, M., Quintilla, A., Howard, I. A., Koch, M., Lemmer, U.

Journal: The Journal of Physical Chemistry C

Year: 2015

doi: 10.1021/acs.jpcc.5b03507

 

 

Scheblykin Group

    Email: marina.gerhard@chemphys.lu.se

    Office: OHI 192-195

    Google Scholar profile