Poster Award for HZB-Postdoc at EMRS Spring Meeting

Ah Reum Jeong has completed her PhD in physics at Ewha Womans University in Seoul, Korea. She now works as a postdoc in the Hybrid Material Systems & Nano-Analytics team of Dr. Marin Rusu.

Ah Reum Jeong has completed her PhD in physics at Ewha Womans University in Seoul, Korea. She now works as a postdoc in the Hybrid Material Systems & Nano-Analytics team of Dr. Marin Rusu.

During the spring meeting 2015 of the European Materials Research Society the Poster contribution of  Dr. Ah Reum Jeong (HZB-Institute for Heterogeneous Material Systems) was selected for an award.  The young scientist has presented results on electronic and structural properties in relation to chemical composition of molybdenum oxide layers, which are widely applied in photovoltaic as well as optoelectronic devices.

During the spring meeting 2015 of the European Materials Research Society the Poster contribution of  Dr. Ah Reum Jeong (HZB-Institute for Heterogeneous Material Systems) was selected for an award.  The young scientist has presented results on electronic and structural properties in relation to chemical composition of molybdenum oxide layers, which are widely applied in photovoltaic as well as optoelectronic devices.

Ah Reum Jeong has completed her PhD in physics at Ewha Womans University in Seoul, Korea. She now works as a postdoc in the Hybrid Material Systems & Nano-Analytics team of Dr. Marin Rusu in the Hybrid-PV-Project. „There are still relevant processes in molybdenum oxide which we do not completely understand yet“, she states.

In her research, she modifies MoO3-layers with defects and analyzes its morphology, structure and work functions at different temperatures by Kelvin probe force microscopy in ultra-high vacuum and Raman spectroscopy. Chemical composition of the films was in addition analyzed by x-ray photoelectron spectroscopy measurements under the guidance of Prof. Dr. Marcus Bär.

„At first I wasn’t aware that among the people surrounding my poster one person was a member of the jury“, Ah Reum Jeong says. „He has asked some quite specific questions and we had a very good discussion. I am really happy about this award since it helps to get even more attention for our work in the scientific community.”

„Ah Reum Jeong has convinced the jury with the scientific quality of her work and with a very clear presentation “, Marin Rusu states.  The poster has been presented at the Symposium "Synthesis, processing and characterization of nanoscale multi functional oxide films".

More Information:  EMRS-2015 Spring Meeting and Exhibition, Lille (France) has taken place from May 11-15, 2015

arö


You might also be interested in

  • Unconventional piezoelectricity in ferroelectric hafnia
    Science Highlight
    26.02.2024
    Unconventional piezoelectricity in ferroelectric hafnia
    Hafnium oxide thin films are a fascinating class of materials with robust ferroelectric properties in the nanometre range. While the ferroelectric behaviour is extensively studied, results on piezoelectric effects have so far remained mysterious. A new study now shows that the piezoelectricity in ferroelectric Hf0.5Zr0.5O2 thin films can be dynamically changed by electric field cycling. Another ground-breaking result is a possible occurrence of an intrinsic non-piezoelectric ferroelectric compound. These unconventional features in hafnia offer new options for use in microelectronics and information technology.
  • 14 parameters in one go: New instrument for optoelectronics
    Science Highlight
    21.02.2024
    14 parameters in one go: New instrument for optoelectronics
    An HZB physicist has developed a new method for the comprehensive characterisation of semiconductors in a single measurement. The "Constant Light-Induced Magneto-Transport (CLIMAT)" is based on the Hall effect and allows to record 14 different parameters of transport properties of negative and positive charge carriers. The method was tested now on twelve different semiconductor materials and will save valuable time in assessing new materials for optoelectronic applications such as solar cells.
  • Sodium-ion batteries: How doping works
    Science Highlight
    20.02.2024
    Sodium-ion batteries: How doping works
    Sodium-ion batteries still have a number of weaknesses that could be remedied by optimising the battery materials. One possibility is to dope the cathode material with foreign elements. A team from HZB and Humboldt-Universität zu Berlin has now investigated the effects of doping with Scandium and Magnesium. The scientists collected data at the X-ray sources BESSY II, PETRA III, and SOLARIS to get a complete picture and uncovered two competing mechanisms that determine the stability of the cathodes.