国产精品

Dr Udo Romer

Dr Udo Romer

Research Associate
  • 2016: Dr.-Ing. (PhD) in electrical engineering from Gottfried Wilhelm Leibniz Universit盲t Hannover in Germany
  • 2010: Dipl.-Phys. (Masters Degree in Physics) from Justus-Liebig-Universit盲t Gie脽en
Engineering
Photovoltaic and Renewable Energy Engineering

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-Universit盲t Gie脽en, 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 Universit盲t Hannover in Germany I moved to Sydney, Australia to work with Professor Alison Lennon at 国产精品 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 国产精品 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.

Location
School of Photovoltaic and Renewable Energy Engineering, Tyree Energy Technologies Building (TETB) H6 Level1 Desk No - 123WS 8
  • Journal articles | 2023
    Pusch A; R枚mer U; Culcer D; Ekins-Daukes NJ, 2023, 'Energy Conversion Efficiency of the Bulk Photovoltaic Effect', PRX Energy, 2,
    Journal articles | 2022
    Liu M; R枚mer U; Ekins-Daukes NJ; Lennon A, 2022, 'Optical analysis of light management for finger designs in CPV systems', Progress in Photovoltaics: Research and Applications, 30, pp. 1219 - 1227,
    Journal articles | 2022
    R枚hr JA; Sartor BE; Duenow JN; Qin Z; Meng J; Lipton J; Maclean SA; R枚mer U; Nielsen MP; Zhao S; Kong J; Reese MO; Steiner MA; Ekins-Daukes NJ; Taylor AD, 2022, 'Identifying optimal photovoltaic technologies for underwater applications', iScience, 25,
    Journal articles | 2022
    Sharma AS; Pusch A; Nielsen MP; R枚mer U; Tayebjee MJY; Rougieux FE; Ekins-Daukes NJ, 2022, 'Constraints imposed by the sparse solar photon flux on upconversion and hot carrier solar cells', Solar Energy, 237, pp. 44 - 51,
    Journal articles | 2022
    Tabernig SW; Soeriyadi AH; R枚mer U; Pusch A; Lamers D; Juhl MK; Payne DNR; Nielsen MP; Polman A; Ekins-Daukes NJ, 2022, 'Avoiding Shading Losses in Concentrator Photovoltaics Using a Soft-Imprinted Cloaking Geometry', IEEE Journal of Photovoltaics, 12, pp. 1116 - 1127,
    Journal articles | 2021
    Lepkowski DL; Grassman TJ; Boyer JT; Chmielewski DJ; Yi C; Juhl MK; Soeriyadi AH; Western N; Mehrvarz H; R枚mer U; Ho-Baillie A; Kerestes C; Derkacs D; Whipple SG; Stavrides AP; Bremner SP; Ringel SA, 2021, '23.4% monolithic epitaxial GaAsP/Si tandem solar cells and quantification of losses from threading dislocations', Solar Energy Materials and Solar Cells, 230,
    Journal articles | 2020
    Ye Q; Western NJ; Romer U; Bremner SP, 2020, 'Characterizing Point Contacting by Localized Dielectric Breakdown and Its Use in Silicon Solar Cell Applications', IEEE Journal of Photovoltaics, 10, pp. 78 - 84,
    Journal articles | 2018
    Hsiao PC; Song N; Wang X; Shen X; Phua B; Colwell J; Romer U; Johnston B; Lim S; Shengzhao Y; Verlinden P; Lennon A, 2018, '266-nm ps laser ablation for copper-plated p-type selective emitter perc silicon solar cells', IEEE Journal of Photovoltaics, 8, pp. 952 - 959,
    Journal articles | 2018
    Song N; Romer U; Gentle A; Lim S; Li Z; Hsiao PC; Gong B; Zhang X; Verlinden P; Lennon A, 2018, 'Metallization method for interdigitated back-contact silicon solar cells employing an insulating resin layer and a Ti/Ag/Cu metal Stack', IEEE Journal of Photovoltaics, 8, pp. 916 - 922,
    Journal articles | 2017
    Rienacker M; Bossmeyer M; Merkle A; Romer U; Haase F; Krugener J; Brendel R; Peibst R, 2017, 'Junction Resistivity of Carrier-Selective Polysilicon on Oxide Junctions and Its Impact on Solar Cell Performance', IEEE Journal of Photovoltaics, 7, pp. 11 - 18,
    Journal articles | 2016
    Peibst R; R枚mer U; Larionova Y; Rien盲cker M; Merkle A; Folchert N; Reiter S; Turcu M; Min B; Kr眉gener J; Tetzlaff D; Bugiel E; Wietler T; Brendel R, 2016, 'Working principle of carrier selective poly-Si/c-Si junctions: Is tunnelling the whole story?', Solar Energy Materials and Solar Cells, 158, pp. 60 - 67,
    Journal articles | 2016
    Rien盲cker M; Merkle A; R枚mer U; Kohlenberg H; Kr眉gener J; Brendel R; Peibst R, 2016, 'Recombination Behavior of Photolithography-free Back Junction Back Contact Solar Cells with Carrier-selective Polysilicon on Oxide Junctions for Both Polarities', Energy Procedia, 92, pp. 412 - 418,
    Journal articles | 2015
    R枚mer U; Peibst R; Ohrdes T; Lim B; Kr眉gener J; Wietler T; Brendel R, 2015, 'Ion implantation for poly-Si passivated back-junction back-contacted solar cells', IEEE Journal of Photovoltaics, 5, pp. 507 - 514,
    Journal articles | 2014
    Peibst R; R枚mer U; Hofmann KR; Lim B; Wietler TF; Kr眉gener J; Harder NP; Brendel R, 2014, 'A simple model describing the symmetric I-V characteristics of p polycrystalline Si/n monocrystalline Si, and n polycrystalline Si/p monocrystalline Si junctions', IEEE Journal of Photovoltaics, 4, pp. 841 - 850,
    Journal articles | 2014
    R枚mer U; Peibst R; Ohrdes T; Lim B; Kr眉gener J; Bugiel E; Wietler T; Brendel R, 2014, 'Recombination behavior and contact resistance of n+ and p+ poly-crystalline Si/mono-crystalline Si junctions', Solar Energy Materials and Solar Cells, 131, pp. 85 - 91,
    Journal articles | 2014
    Schulte-Huxel H; R枚mer U; Blankemeyer S; Merkle A; Larionova Y; Steckenreiter V; Peibst R; Kajari-Schroeder S; Brendel R, 2014, 'Two-level metallization and module integration of point-contacted solar cells', Energy Procedia, 55, pp. 361 - 368,
    Journal articles | 2013
    Haase F; Kajari-Schr枚der S; R枚mer U; Neubert T; Petermann JH; Peibst R; Harder NP; Brendel R, 2013, 'Increased front surface recombination by rear-side laser processing on thin silicon solar cells', IEEE Journal of Photovoltaics, 3, pp. 976 - 984,
    Journal articles | 2012
    Haas G; Lautenschlaeger S; Roemer U; Eisermann S; Laufer A; Pinnisch M; Meyer BK, 2012, 'Growth of Cubic Zinc Sulfide on (001) GaP Substrates', E-MRS 2011 FALL SYMPOSIUM I: ADVANCES IN TRANSPARENT ELECTRONICS, FROM MATERIALS TO DEVICES III, 34,
    Journal articles | 2010
    Lautenschlaeger S; Eisermann S; Hofmann MN; Roemer U; Pinnisch M; Laufer A; Meyer BK; Von Wenckstern H; Lajn A; Schmidt F; Grundmann M; Blaesing J; Krost A, 2010, 'Morphological, structural and electrical investigations on non-polar a-plane ZnO epilayers', Journal of Crystal Growth, 312, pp. 2078 - 2082,
  • Conference Papers | 2022
    Soeriyadi AH; Hollemann C; Madumelu C; Haase F; R枚mer U; Brendel R; Peibst R; Hallam BJ, 2022, 'Impact of Firing and Capping Layers on Long-term Stability of Doped Poly-Si Passivating Contact Layers', in AIP Conference Proceedings,
    Conference Papers | 2021
    Lepkowski DL; Kasher T; Boyer JT; Blumer ZH; Yi C; Juhl MK; Soeriyadi AH; Mehrvarz H; Romer U; Ho-Baillie A; Bremner SP; Ringel SA; Grassman TJ, 2021, 'Recent Advances in GaAsP/Si Top Cell Enabling 27% Tandem Efficiency', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 1644 - 1646,
    Conference Papers | 2021
    Liu M; Romer U; Ekins-Daukes NJ; Lennon A, 2021, 'Optical Analysis of Secondary Optics for Solar Concentrators with a View to Optimising Cell Metallisation', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 2270 - 2272,
    Conference Papers | 2020
    Liu M; Soeriyadi AH; Song N; Hsiao P-C; Romer U; Ekins-Daukes N; Lennon A, 2020, 'Formation Mechanism of Cu-based Ohmic Contacts for GaAs Solar Cells', in 2020 47TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC), IEEE, ELECTR NETWORK, pp. 829 - 832, presented at 47th IEEE Photovoltaic Specialists Conference (PVSC), ELECTR NETWORK, 15 June 2020 - 21 August 2020,
    Conference Papers | 2020
    Liu M; Soeriyadi AH; Song N; Hsiao PC; Romer U; Ekins-Daukes N; Lennon A, 2020, 'Formation Mechanism of Cu-based Ohmic Contacts for GaAs Solar Cells', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 0829 - 0832,
    Conference Papers | 2019
    Wang H; R枚mer U; Lei X; Wei Y; Al Abed A; Ladouceur F; Silvestri L; Lovell N; Roemer U, 2019, 'Towards bi-directional electro-optic neuronal interfaces', in Goldys EM; Gibson BC (ed.), Proceedings of SPIE - The International Society for Optical Engineering. Biophotonics Australasia 2019, Society of Photo-optical Instrumentation Engineers, Melbourne, presented at ANZCOP 2019, Melbourne, 08 December 2019 - 12 December 2019,
    Conference Papers | 2018
    Hsiao PC; Zhang W; Li Z; Romer U; Lennon A; Zhang DW, 2018, 'Direct Copper Plating to IWO for Silicon Heterojunction Solar Cells', in 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC, Institute of Electrical and Electronics Engineers (IEEE), HI, Waikoloa, pp. 3719 - 3721, presented at 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC), HI, Waikoloa, 10 June 2018 - 15 June 2018,
    Conference Papers | 2017
    Rienacker M; Bossmeyer M; Merkle A; Romer U; Haase F; Krugener J; Brendel R; Peibst R, 2017, 'Notice of Removal: Junction resistivity of carrier selective polysilicon on oxide junctions and its impact on the solar cell performance', in 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017, pp. 1 - 7,
    Conference Papers | 2017
    R枚mer U; Song N; Li Z; Li Y; Zhang X; Shengzhao Y; Verlinden PJ; Lennon A, 2017, 'Decoupling the metal layer of back contact solar cells - Optical and electrical benefits', in Energy Procedia, Freiburg, Germany, pp. 907 - 913, presented at 7th International Conference on Silicon Photovoltaics, SiliconPV 2017, Freiburg, Germany, 03 April 2017 - 05 April 2017,
    Conference Papers | 2014
    Peibst R; Romer U; Larionova Y; Schulte-Huxel H; Ohrdes T; Haberle M; Lim B; Krugener J; Stichtenoth D; Wutherich T; Schollhorn C; Graff J; Brendel R, 2014, 'Building blocks for back-junction back-contacted cells and modules with ion-implanted poly-Si junctions', in Proceedings of the 2014 IEEE 40th Photovoltaic Specialist Conference (PVSC), Denver, presented at 2014 IEEE 40th Photovoltaic Specialist Conference (PVSC), Denver, 08 June 2014 - 13 June 2014,
    Conference Papers | 2014
    Romer U; Merkle A; Peibst R; Ohrdes T; Lim B; Krugener J; Brendel R, 2014, 'Ion-implanted Poly-Si / c-Si Junctions as a Back-surface Field in Back-Junction Back-Contacted Solar Cells', in Proceedings of the 28th European Photovoltaic Solar Energy Conference, 29th European Photovoltaic Solar Energy Conference and Exhibition, Amsterdam, pp. 1107 - 1110, presented at 29th European Photovoltaic Solar Energy Conference and Exhibition, Amsterdam, 22 September 2014 - 26 September 2014,
    Conference Papers | 2013
    Brendel R; Dullweber T; Gogolin R; Hannebauer H; Harder NP; Hensen J; Kajari-Schroder S; Peibst R; Petermann JH; Romer U; Schmidt J; Schulte-Huxel H; Steckenreiter V, 2013, 'Recent Progress and Options for Future Crystalline Silicon Solar Cells', in Proceedings of the 28th European Photovoltaic Solar Energy Conference, 28th European Photovoltaic Solar Energy Conference and Exhibition, Paris, presented at 28th European Photovoltaic Solar Energy Conference and Exhibition, Paris, 30 September 2013 - 04 October 2013,
    Conference Papers | 2013
    Romer U; Peibst R; Ohrdes T; Larionova Y; Harder NP; Brendel R; Grohe A; Stichtenoth D; Wutherich T; Schollhorn C; Krokoszinski HJ; Graff J, 2013, 'Counterdoping with patterned ion implantation', in Proceedings of the 2013 IEEE 39th Photovoltaic Specialists Conference (PVSC), Tampa, presented at 2013 IEEE 39th Photovoltaic Specialists Conference (PVSC), Tampa, 16 June 2013 - 21 June 2013,
    Conference Papers | 2012
    Ohrdes T; Romer U; Larionova Y; Peibst R; Altermatt PP; Harder NP, 2012, 'High Fill-Factors of Back-Junction Solar Cells without Front Surface Field Diffusion', in Proceedings of the 27th European Photovoltaic Solar Energy Conference, 27th European Photovoltaic Solar Energy Conference and Exhibition, Frankfurt, pp. 866 - 869, presented at 27th European Photovoltaic Solar Energy Conference and Exhibition, Frankfurt, 24 September 2012 - 28 September 2012,
    Conference Posters | 2012
    Romer U, 2012, 'Limits for short-pulse laser processing of high efficiency crystalline silicon solar cells on thin wafers', Hangzhou, presented at 22nd International PV Science and Engineering Conference, Hangzhou, 05 September 2012 - 09 September 2012

  • 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"

  • 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

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 国产精品 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 国产精品 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.