Researcher

Dr Udo Romer

Keywords

Fields of Research (FoR)

Photovoltaic devices (solar cells)

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Biography

I am a DECRA fellow in the School of Photovoltaics and Renewable Energy Engineering, working on multi-junction (MJ) solar cells for biomedical applications and high efficiency III-V MJ concentrator solar cells (see Research Activities).

 

I obtained my Diplom in Physics from the Justus-Liebig-Universität Gießen, Germany and worked towards my PhD at the Institute for Solar Energy Research Hameln (ISFH) in Hamelin, Germany, under supervision...view more

I am a DECRA fellow in the School of Photovoltaics and Renewable Energy Engineering, working on multi-junction (MJ) solar cells for biomedical applications and high efficiency III-V MJ concentrator solar cells (see Research Activities).

 

I obtained my Diplom in Physics from the Justus-Liebig-Universität Gießen, Germany and worked towards my PhD at the Institute for Solar Energy Research Hameln (ISFH) in Hamelin, Germany, under supervision of Professor Niels Peter Harder, Professor Robby Peibst and Professor Tobias Wietler. My thesis research focussed on ion implanted, large area back-contact Si solar cells and on highly carrier selective poly-Si contacts for c-Si solar cells.

After receiving my PhD in electrical engineering from the Gottfried Wilhelm Leibniz Universität Hannover in Germany I moved to Sydney, Australia to work with Professor Alison Lennon at UNSW on inkjet and laser patterning processes for plated contacts for large area back-contacted Si solar cells and together with Professor Bram Hoex, on doped poly-Si passivating contacts. In 2018 I started my DFG (German Research Foundation) Research Fellowship at UNSW on inkjet printed doping of poly-Si contacts and in 2020 I joined the research Groups of A/Prof. Nicholas Ekins-Daukes and Dr. Stephen Bremner, where I worked on fabrication processes for III-V and III-V on Si solar cells.


My Grants

  • 2023-2026 ARC Linkage Project on "Advanced metallisation for III-V Photovoltaic Solar Power Systems"
  • 2021-2024 ARC DECRA on "Nervous tissue stimulation using Multi-Junction Silicon Photodiodes"
  • 2019-2020 AUSIAPV Collaboration Grant on "Silicon Solar Cells with Silicon Carbide Passivated Contacts"
  • 2018-2019 DFG Research Stipend on "Doping of poly-Si contacts for high efficiency back junction back contact silicon solar cells using inkjet-printed doping sources"

My Qualifications

  • 2016: Dr.-Ing. (PhD) in electrical engineering from Gottfried Wilhelm Leibniz Universität Hannover in Germany
  • 2010: Dipl.-Phys. (Masters Degree in Physics) from Justus-Liebig-Universität Gießen

My Awards

  • Solar World Junior Einstein Award 2016 for my PhD thesis
  • Silicon PV Award 2014 for one of the ten best ranked contributions to the Silicon PV conference 2014

My Research Activities

In my DECRA fellowship which started in mid 2021, I am aiming to fabricate multi-junction photodiode arrays for use in brain machine interfaces like retinal implants.

Background: Two of the main causes of vision loss, retinitis pigmentosa and age-related macular degeneration, are caused by a degeneration of photoreceptors in the retina, while the remaining visual pathway stays intact. By placing electrodes in the retina, it is possible to electrically stimulate the remaining intact neural tissue and restoring vision.

The School of Photovoltaic & Renewable Energy Engineering within the UNSW Faculty of Engineering has been at the leading edge of solar cell development for over 30 years, reporting many world record solar cell efficiencies. In a collaboration with the UNSW Graduate School of Biomedical Engineering we are now aiming to develop solar cells that can stimulate nervous tissue upon illumination and to fabricate arrays of small solar cells as prototypes for wireless retinal prostheses and other light powered brain machine interfaces.


My Research Supervision


Supervision keywords


Areas of supervision

  • GaAs based multi-junction photovoltaic pixel arrays for wireless brain machine interfaces
    • Aim: replacing conventional electrodes that need electrical wires with photovoltaic "optrodes" that can be powered via optical fibers
    • Research areas: Microfabrocation of GaAs multijunction photodiode arrays, incl. photolithography, etching, vacuum deposition, optoelectrical characterisation
  • GaAs based LEDs and photovoltaic cells for subdermal biomdedical implants
    • Aim: optical powering of and optical communication with small subdermal implants via IR radiation
    • Research areas: Microfabrocation of GaAs multijunction solar cells and/or InGaAs LEDs, incl. photolithography, etching, vacuum deposition, optoelectrical characterisation
  • Microfabrication and metallisation for innovative III-V concentrator solar cells
    • Aim: At higher concentration, series resistance becomes the major loss mechanism of solar cells, using innovative metallisation strategies will lead to much increased cell efficiencies
    • Research areas: Microfabrocation of III-V multijunction solar cells, incl. photolithography, etching, vacuum deposition, electroplating, optoelectrical characterisation

Currently supervising

  • Ashan Warnakulasuriya with his PhD thesis on "Subdermal CMOS Biosensor for Continuous Wireless Interstitial Fluid Sensing"
  • Yansong Wang with his PhD thesis on "Multi-Junction GaAs Solar Cells for Biomedical Applications"

Previously supervised PhD students

  • Abhinav Sanjay Sharma with his PhD thesis on "Investigating the use of remote valleys in PV devices"
  • Mengdi Liu with her PhD thesis on "Metallisation for Advanced Solar Cells"
  • Chukwuka Uzochukwu Madumelu with his PhD thesis on "Advanced hydrogenation on next-generation solar cells with passivated contacts"
  • Qilin Ye on "Characterizing point contacting by localized dielectric breakdown and its use in Silicon Solar Cell Applications"
  • Chang-Yeh Lee on "Metal Oxide Thin Films for Silicon Solar Cells"
  • Tian Zhang on "Transition Metal Oxides and Their Application as Hole-Selective Contacts for Silicon Solar Cells"
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Location

School of Photovoltaic and Renewable Energy Engineering,
Tyree Energy Technologies Building (TETB) H6
Level1
Desk No - 123WS 8