By Dr Udo Romer

Journal articles

Pusch A; Römer U; Culcer D; Ekins-Daukes NJ, 2023, 'Energy Conversion Efficiency of the Bulk Photovoltaic Effect', PRX Energy, 2, http://dx.doi.org/10.1103/prxenergy.2.013006

Liu M; Römer 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, http://dx.doi.org/10.1002/pip.3570

Tabernig SW; Soeriyadi AH; Römer 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, http://dx.doi.org/10.1109/JPHOTOV.2022.3182277

Röhr JA; Sartor BE; Duenow JN; Qin Z; Meng J; Lipton J; Maclean SA; Römer 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, http://dx.doi.org/10.1016/j.isci.2022.104531

Sharma AS; Pusch A; Nielsen MP; Römer 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, http://dx.doi.org/10.1016/j.solener.2022.03.037

Lepkowski DL; Grassman TJ; Boyer JT; Chmielewski DJ; Yi C; Juhl MK; Soeriyadi AH; Western N; Mehrvarz H; Römer 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, http://dx.doi.org/10.1016/j.solmat.2021.111299

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, http://dx.doi.org/10.1109/JPHOTOV.2019.2953394

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, http://dx.doi.org/10.1109/JPHOTOV.2018.2834629

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, http://dx.doi.org/10.1109/JPHOTOV.2018.2825465

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, http://dx.doi.org/10.1109/JPHOTOV.2016.2614123

Peibst R; Römer U; Larionova Y; Rienäcker M; Merkle A; Folchert N; Reiter S; Turcu M; Min B; Krügener 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, http://dx.doi.org/10.1016/j.solmat.2016.05.045

Rienäcker M; Merkle A; Römer U; Kohlenberg H; Krügener 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, http://dx.doi.org/10.1016/j.egypro.2016.07.121

Römer U; Peibst R; Ohrdes T; Lim B; Krügener 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, http://dx.doi.org/10.1109/JPHOTOV.2014.2382975

Peibst R; Römer U; Hofmann KR; Lim B; Wietler TF; Krügener 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, http://dx.doi.org/10.1109/JPHOTOV.2014.2310740

Römer U; Peibst R; Ohrdes T; Lim B; Krügener 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, http://dx.doi.org/10.1016/j.solmat.2014.06.003

Schulte-Huxel H; Römer 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, http://dx.doi.org/10.1016/j.egypro.2014.08.104

Haase F; Kajari-Schröder S; Römer 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, http://dx.doi.org/10.1109/JPHOTOV.2013.2261573

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, http://dx.doi.org/10.1088/1757-899X/34/1/012003

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, http://dx.doi.org/10.1016/j.jcrysgro.2010.04.029

Conference Papers

Soeriyadi AH; Hollemann C; Madumelu C; Haase F; Römer 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, http://dx.doi.org/10.1063/5.0089658

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, http://dx.doi.org/10.1109/PVSC43889.2021.9518911

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, http://dx.doi.org/10.1109/PVSC43889.2021.9518768

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, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000653077100205&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

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, http://dx.doi.org/10.1109/PVSC45281.2020.9300525

Wang H; Römer 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, http://dx.doi.org/10.1117/12.2539997

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, http://dx.doi.org/10.1109/PVSC.2018.8547698

Römer 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, http://dx.doi.org/10.1016/j.egypro.2017.09.290

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, http://dx.doi.org/10.1109/PVSC.2017.8366491

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, http://dx.doi.org/10.4229/EUPVSEC20142014-2AV.3.61

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, http://dx.doi.org/10.1109/PVSC.2014.6925049

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, http://dx.doi.org/10.4229/28thEUPVSEC2013-2BP.1.1

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, http://dx.doi.org/10.1109/PVSC.2013.6744375

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, http://dx.doi.org/10.4229/27thEUPVSEC2012-2DO.3.5

Conference Posters

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

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