By Professor N.J. Ekins-Daukes

Journal articles

Lee HS; Yamaguchi M; Ekins-Daukes NJ; Khan A; Takamoto T; Agui T; Kamimura K; Kaneiwa M; Imaizumi M; Ohshima T; Itoh H, 2005, 'Deep-level defects introduced by 1 MeV electron radiation in AlInGaP for multijunction space solar cells', Journal of Applied Physics, 98, http://dx.doi.org/10.1063/1.2115095

Adachi M; Khan A; Ando K; Ekins-Daukes NJ; Lee HS; Yamaguchi M, 2005, 'Electrical and optical properties of radiation-induced dominant recombination center in InxGa1-xP space solar cells', Physical Review B Condensed Matter and Materials Physics, 72, http://dx.doi.org/10.1103/PhysRevB.72.155320

Araki K; Uozumi H; Egami T; Hiramatsu M; Miyazaki Y; Kemmoku Y; Akisawa A; Ekins-Daukes NJ; Lee HS; Yamaguchi M, 2005, 'Development of concentrator modules with dome-shaped fresnel lenses and triple-junction concentrator cells', Progress in Photovoltaics Research and Applications, 13, pp. 513 - 527, http://dx.doi.org/10.1002/pip.643

Bushnell DB; Tibbits TND; Barnham KWJ; Connolly JP; Mazzer M; Ekins-Daukes NJ; Roberts JS; Hill G; Airey R, 2005, 'Effect of well number on the performance of quantum-well solar cells', Journal of Applied Physics, 97, http://dx.doi.org/10.1063/1.1946908

Yamaguchi M; Takamoto T; Araki K; Ekins-Daukes N, 2005, 'Multi-junction III-V solar cells: Current status and future potential', Solar Energy, 79, pp. 78 - 85, http://dx.doi.org/10.1016/j.solener.2004.09.018

Khan A; Marupaduga S; Anandakrishnan SS; Alam M; Ekins-Daukes NJ; Lee HS; Sasaki T; Yamaguchi M; Takamoto T; Agui T; Kamimura K; Kaneiwa M; Imazumi M, 2004, 'Radiation response analysis of wide-gap p-AllnGaP for superhigh-efficiency space photovoltaics', Applied Physics Letters, 85, pp. 5218 - 5220, http://dx.doi.org/10.1063/1.1829136

Ekins-Daukes NJ; Lee HS; Sasaki T; Yamaguchi M; Khan A; Takamoto T; Agui T; Kamimura K; Kaneiwa M; Imaizumi M; Ohshima T; Kamiya T, 2004, 'Carrier removal in lattice-mismatched InGaP solar cells under 1-MeV-electron irradiation', Applied Physics Letters, 85, pp. 2511 - 2513, http://dx.doi.org/10.1063/1.1794371

Chatten AJ; Barnham KWJ; Buxton BF; Ekins-Daukes NJ; Malik MA, 2004, 'Quantum dot solar concentrators', Semiconductors, 38, pp. 909 - 917, http://dx.doi.org/10.1134/1.1787111

Narayanan KL; Soga T; Ekins-Daukes NJ; Yamaguchi M, 2004, 'Rectifying I-V Characteristics of n-Type Fluorine Implanted a-C/p-Type Si Heterojunction Diodes', Japanese Journal of Applied Physics Part 2 Letters, 43, pp. L24 - L26, http://dx.doi.org/10.1143/JJAP.43.L24

Ekins-Daukes NJ; Ballard I; Calder CDJ; Barnham KWJ; Hill G; Roberts JS, 2003, 'Photovoltaic efficiency enhancement through thermal up-conversion', Applied Physics Letters, 82, pp. 1974 - 1976, http://dx.doi.org/10.1063/1.1561159

Chatten AJ; Barnham KWJ; Buxton BF; Ekins-Daukes NJ; Malik MA, 2003, 'A new approach to modelling quantum dot concentrators', Solar Energy Materials and Solar Cells, 75, pp. 363 - 371, http://dx.doi.org/10.1016/S0927-0248(02)00182-4

Bushnell DB; Ekins-Daukes NJ; Barnham KWJ; Connolly JP; Roberts JS; Hill G; Airey R; Mazzer M, 2003, 'Short-circuit current enhancement in Bragg stack multi-quantum-well solar cells for multi-junction space cell applications', Solar Energy Materials and Solar Cells, 75, pp. 299 - 305, http://dx.doi.org/10.1016/S0927-0248(02)00172-1

Ekins-Daukes NJ; Kawaguchi K; Zhang J, 2002, 'Strain-Balanced Criteria for Multiple Quantum Well Structures and Its Signature in X-ray Rocking Curves', Crystal Growth and Design, 2, pp. 287 - 292, http://dx.doi.org/10.1021/cg025502y

Rohr C; Connolly JP; Ekins-Daukes N; Abbott P; Ballard I; Barnham KWJ; Mazzer M; Button C, 2002, 'InGaAs/InGaAs strain-compensated quantum well cells for thermophotovoltaic applications', Physica E Low Dimensional Systems and Nanostructures, 14, pp. 158 - 161, http://dx.doi.org/10.1016/S1386-9477(02)00369-7

Ekins-Daukes NJ; Bushnell DB; Connolly JP; Barnham KWJ; Mazzer M; Roberts JS; Hill G; Airey R, 2002, 'Strain-balanced quantum well solar cells', Physica E Low Dimensional Systems and Nanostructures, 14, pp. 132 - 135, http://dx.doi.org/10.1016/S1386-9477(02)00378-8

Ekins-Daukes NJ; Barnes JM; Barnham KWJ; Connolly JP; Mazzer M; Clark JC; Grey R; Hill G; Pate MA; Roberts JS, 2001, 'Strained and strain-balanced quantum well devices for high-efficiency tandem solar cells', Solar Energy Materials and Solar Cells, 68, pp. 71 - 87, http://dx.doi.org/10.1016/S0927-0248(00)00346-9

Barnham KWJ; Ballard I; Connolly JG; Ekins-Daukes N; Kluftinger BG; Nelson J; Rohr C; Mazzer M, 2000, 'Recent results on quantum well solar cells', Journal of Materials Science Materials in Electronics, 11, pp. 531 - 536, http://dx.doi.org/10.1023/A:1026587616640

Ekins-Daukes NJ; Barnham KWJ; Connolly JP; Roberts JS; Clark JC; Hill G; Mazzer M, 1999, 'Strain-balanced GaAsP/InGaAs quantum well solar cells', Applied Physics Letters, 75, pp. 4195 - 4197, http://dx.doi.org/10.1063/1.125580

Ekins-Daukes NJ; Nelson J; Barnes J; Barnham KWJ; Kluftinger BG; Tsui ESM; Foxon CT; Cheng TS; Roberts JS, 1998, 'Radiative currents in quantum-well solar cells', Physica E Low Dimensional Systems and Nanostructures, 2, pp. 171 - 176, http://dx.doi.org/10.1016/S1386-9477(98)00037-X

Nelson J; Barnes J; Ekins-Daukes N; Kluftinger B; Tsui E; Barnham K; Foxon CT; Cheng T; Roberts JS, 1997, 'Observation of suppressed radiative recombination in single quantum well p-i-n photodiodes', Journal of Applied Physics, 82, pp. 6240 - 6246, http://dx.doi.org/10.1063/1.366510

Conference Papers

Nielsen MP; McNab S; Baldacchino AJ; Jones A; Ciesla A; Hoex B; Tayebjee MJY; Ekins-Daukes NJ, 2025, 'Interfacial band alignment and triplet energy transfer in singlet fission silicon solar cells', in Proceedings of the International Conference on Hybrid and Organic Photovoltaics, FUNDACIO DE LA COMUNITAT VALENCIANA SCITO, presented at 12º nternational Conference on Hybrid and Organic Photovoltaics, 12 May 2025 - 14 May 2025, http://dx.doi.org/10.29363/nanoge.hopv.2025.019

Xia D; Sharma ASS; Pusch A; Tayebjee MJY; Nielsen MP; Rougieux FE; Dorman KR; Mishima TD; Santos MB; Sellers IR; Ekins-Daukes NJ; Krich JJ, 2024, 'Global Analysis of Valley Photovoltaic Devices Demonstrates Challenges of Current Designs', in 2024 IEEE 52nd Photovoltaic Specialist Conference (PVSC), IEEE, pp. 0494 - 0494, presented at 2024 IEEE 52nd Photovoltaic Specialist Conference (PVSC), 09 June 2024 - 14 June 2024, http://dx.doi.org/10.1109/pvsc57443.2024.10749061

de Clercq D; Carwithen B; Hosseinabadi P; Nielsen M; Brett M; Prasad S; Farahani A; Li H; Feng J; Beves J; Ekins-Daukes N; Cole J; Thordarson P; Tayebjee M; Schmidt T; Sanders S, 2024, 'Resolving the emissive intermediate in singlet fission', in Proceedings of the International Conference on Hybrid and Organic Photovoltaics, FUNDACIO DE LA COMUNITAT VALENCIANA SCITO, presented at International Conference on Hybrid and Organic Photovoltaics, 12 May 2024 - 15 May 2024, http://dx.doi.org/10.29363/nanoge.hopv.2024.011

Schmidt TW; Tayebjee MJY; Nielsen MP; McCamey DR; Ekins-Daukes N; Baldacchino A; Mo A; Brett MW; Pearce PM; Ciesla AM; Chang NL; Hoex B; Beves JE; Jiang Y; McNab S; Carwithen BP; de Clercq DM; Tong J, 2024, 'Singlet fission solar cells', in Freundlich A; Hinzer K; Collin S; Sellers IR (eds.), Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XIII, SPIE, pp. 2 - 2, presented at Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XIII, 27 January 2024 - 01 February 2024, http://dx.doi.org/10.1117/12.3003348

Pearce PM; Ekins-Daukes NJ, 2024, 'Efficiency Limits of Silicon Solar Cells with Organic Singlet Fission Layers', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 1191 - 1193, http://dx.doi.org/10.1109/PVSC57443.2024.10749263

Harrison J; Pearce P; Yang F; Nielsen M; Brindley H; Ekins-Daukes NJ, 2024, 'Evaluating Power Output of Terrestrial Thermoradiative Diodes with Atmospheric Modelling', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 1366 - 1369, http://dx.doi.org/10.1109/PVSC57443.2024.10748806

Harrison J; Pearce P; Ekins-Daukes NJ, 2024, 'Optimized Bragg Reflectors for GaAs Subcell in InGaP/GaAs/Ge Triple-Junctions', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 1449 - 1451, http://dx.doi.org/10.1109/PVSC57443.2024.10749046

Lehmann A; Keevers M; Ekins-Daukes N, 2024, 'Techniques in flowline optics: towards calculating étendue from flowlines', in Proceedings of SPIE the International Society for Optical Engineering, http://dx.doi.org/10.1117/12.3028207

Nielsen MP; Sazzad MH; Pusch A; Pearce PM; Reece PJ; Ekins-Daukes NJ, 2023, 'A direct comparison between thermoradiative and thermophotovoltaic operation of HgCdTe photodiodes', in Munday JN; Bermel P (ed.), New Concepts in Solar and Thermal Radiation Conversion V, SPIE, pp. 15 - 15, presented at New Concepts in Solar and Thermal Radiation Conversion V, 20 August 2023 - 25 August 2023, http://dx.doi.org/10.1117/12.2677744

Schmidt TW; Ekins-Daukes NJ; Tayebjee M; Nielsen MP; McCamey DR; Jiang JY; Hoex B; Ciesla A; Pearce PM; Chang N; Beves JE, 2023, 'Organic multiple exciton generation and silicon (OMEGA Si)', in Munday JN; Bermel P (ed.), New Concepts in Solar and Thermal Radiation Conversion V, SPIE, pp. 8 - 8, presented at New Concepts in Solar and Thermal Radiation Conversion V, 20 August 2023 - 25 August 2023, http://dx.doi.org/10.1117/12.2677760

Abdullah-Vetter Z; Dwivedi P; Ekins-Daukes N; Trupke T; Hameiri Z, 2023, 'Automated analysis of internal quantum efficiency measurements of GaAs solar cells using machine learning', in Conference Record of the IEEE Photovoltaic Specialists Conference, Institute of Electrical and Electronics Engineers (IEEE), Puerto Rico, pp. 1 - 3, presented at 50th IEEE Photovoltaics Specialists Conference, Puerto Rico, 12 June 2023 - 16 June 2023, http://dx.doi.org/10.1109/PVSC48320.2023.10359747

Nielsen MP; Sazzad MH; Pusch A; Pearce PM; Reece PJ; Ekins-Daukes NJ, 2023, 'A direct comparison of thermoradiative and thermophotovoltaic operation of HgCdTe photodiodes', in 2023 IEEE 50TH PHOTOVOLTAIC SPECIALISTS CONFERENCE, PVSC, IEEE, PR, San Juan, presented at IEEE 50th Photovoltaic Specialists Conference (PVSC), PR, San Juan, 11 June 2023 - 16 June 2023, http://dx.doi.org/10.1109/PVSC48320.2023.10359604

Wilson T; Ekins-Daukes N, 2023, 'Suitability of GaAsBi as a candidate junction in a III-V multi-junction solar cell', in 2023 IEEE 50TH PHOTOVOLTAIC SPECIALISTS CONFERENCE, PVSC, IEEE, PR, San Juan, presented at IEEE 50th Photovoltaic Specialists Conference (PVSC), PR, San Juan, 11 June 2023 - 16 June 2023, http://dx.doi.org/10.1109/PVSC48320.2023.10360095

Pearce PM; Halme J; Jiang JY; Elsehrawy F; Ekins-Daukes NJ, 2023, 'Efficiency Limits for Multi-Junction Coloured Photovoltaics', in Conference Record of the IEEE Photovoltaic Specialists Conference, http://dx.doi.org/10.1109/PVSC48320.2023.10360038

Ekins-Daukes NJ; Nielsen MP; Pusch A; Sazzad MH; Pearce PM; Reece PJ, 2022, 'Demonstrating the Thermoradiative Diode: Generating Electrical Power Through Radiative Emission', in 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC), IEEE, pp. 0959 - 0959, presented at 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC), 05 June 2022 - 10 June 2022, http://dx.doi.org/10.1109/pvsc48317.2022.9938647

Nielsen MP; Pusch A; Sazzad MH; Pearce PM; Reece PJ; Ekins-Daukes NJ, 2022, 'Demonstrating the thermoradiative diode: Generating electrical power through radiative emission', in Proceedings of SPIE the International Society for Optical Engineering, http://dx.doi.org/10.1117/12.2631707

Steiner MA; France RM; Buencuerpo J; Geisz JF; Nielsen MP; Pusch A; Olavarria WJ; Young M; Ekins-Daukes NJ, 2021, '32.9% efficient tandem solar cell with strain-balanced GaInAs/GaAsP quantum wells', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 1084 - 1085, http://dx.doi.org/10.1109/PVSC43889.2021.9518819

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

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, http://dx.doi.org/10.1109/pvsc45281.2020.9300525

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, Institute of Electrical and Electronics Engineers (IEEE), pp. 0829 - 0832, presented at 2020 47th IEEE Photovoltaic Specialists Conference (PVSC), 15 June 2020 - 21 August 2020, http://dx.doi.org/10.1109/PVSC45281.2020.9300525

Ekins-Daukes NJ; Sazzad MH; Kiyumi LA; Nielsen MP; Reece P; Mellor A; Green MA; Pusch A, 2020, 'Generating Power at Night Using a Thermoradiative Diode, How is this Possible?', in Conference Record of the IEEE Photovoltaic Specialists Conference, IEEE, Calgary, AB, Canada, pp. 2214 - 2218, presented at 2020 47th IEEE Photovoltaic Specialists Conference (PVSC), Calgary, AB, Canada, 15 June 2020 - 21 August 2020, http://dx.doi.org/10.1109/PVSC45281.2020.9300980

Pusch A; Dubajic M; Ekins-Daukes NJ; Bremner S, 2020, 'Fundamental Aspects of Hot Carrier Solar Cell Operation', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 2227 - 2232, http://dx.doi.org/10.1109/PVSC45281.2020.9300536

Pearce P; Sayre L; Johnson A; Hirst L; Ekins-Daukes N, 2020, 'Design of photonic light-trapping structures for ultra-thin solar cells', in Proceedings of SPIE the International Society for Optical Engineering, http://dx.doi.org/10.1117/12.2550136

Pusch A; Ekins-Daukes NJ, 2019, 'The role of etendue and ratchets in spectral conversion and multi-color emission', in Optics InfoBase Conference Papers, OSA Publishing, Burlingame, California United States, pp. pm2c.4, presented at Optical Devices and Materials for Solar Energy and Solid-state Lighting 2019, Burlingame, California United States, 29 July 2019 - 02 August 2019, http://dx.doi.org/10.1364/PVLED.2019.PM2C.4

Reinders A; Ekins-Daukes N; Schmidt T; Yang H; Michalska M; Pelosi R; Nitti M; Gillan L; McCamey D; Gholizadeh EM; Hosseinabadi P; Welsh B; Kable S, 2019, 'Designing with Luminescent Solar Concentrator Photovoltaics', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 221 - 226, http://dx.doi.org/10.1109/PVSC40753.2019.8980812

Cleveland ER; Kotulak N; Tomasulo S; Jenkins PP; Mellor A; Pearce P; Ekins-Daukes NJ; Yakes MK, 2019, 'Interstitial Light Trapping and Optical Confinement in Multijunction Solar Cells', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 2826 - 2828, http://dx.doi.org/10.1109/PVSC40753.2019.8980921

Pearce P; Ekins-Daukes N, 2019, 'Open-source integrated optical modelling with RayFlare', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 2627 - 2633, http://dx.doi.org/10.1109/PVSC40753.2019.8980868

Pusch A; Ekins-Daukes NJ, 2019, 'Thinking beyond Limiting Efficiencies of Advanced Concepts: Design Rules and Material Requirements for Realistic Devices', in Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 8 - 11, http://dx.doi.org/10.1109/PVSC40753.2019.8981400

Lehmann AG; Ekins-Daukes N; Keevers M, 2019, 'Numerical flowline concentrator design in 3D', in Proceedings of SPIE the International Society for Optical Engineering, http://dx.doi.org/10.1117/12.2526849

Pearcef P; Wilsonf T; Johnson A; Ekins-Daukes N, 2018, 'Characterization of SiGeSn for Use as a 1 eV Sub-Cell in Multi-Junction 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, pp. 943 - 948, http://dx.doi.org/10.1109/PVSC.2018.8547764

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