Imperial College London
Emeritus Professor Keith Barnham

Emeritus ProfessorKeithBarnham

Faculty of Natural Sciences, Department of Physics

Distinguished Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 7579k.barnham Website

 
 
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Assistant

 

Mrs Carolyn Dale +44 (0)20 7594 7579

 
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Location

 

1006HBlackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

137 results found

Fuhrer MF, Connolly JP, Mazzer M, Ballard IM, Johnson DC, Barnham KWJ, Bessiere A, Roberts JS, Airey R, Calder C, Hill G, Tibbits TND, Pate M, Geen Met al., 2008, HOT CARRIERS IN STRAIN BALANCED QUANTUM WELL SOLAR CELLS, 33rd IEEE Photovoltaic Specialists Conference, Publisher: IEEE, Pages: 1016-+, ISSN: 0160-8371

Conference paper

Johnson DC, Ballard IM, Barnham KWJ, Bessiere A, Connolly JP, Robert JS, Hill G, Calder Cet al., 2007, Observation of photon recycling effects in strain-balanced quantum well solar cells, Proc. 20th European Photovoltaic Solar Energy Conference, Pages: 94-97

Conference paper

Rimada JC, Hernandez L, Connolly JP, Barnham KWJet al., 2007, Conversion efficiency enhancement of AlGaAs quantum well solar cells, MICROELECTRONICS JOURNAL, Vol: 38, Pages: 513-518, ISSN: 0026-2692

Journal article

Roberts JS, Airey R, Hill G, Calder C, Barnham KWJ, Lynch M, Tibbits T, Johnson D, Pakes A, Grantham Tet al., 2007, Strain-balanced MQW pin solar cells grown using a robot-loading showerhead reactor, 13th International Conference on Metal Organic Vapor Phase Epitaxy, Publisher: ELSEVIER SCIENCE BV, Pages: 754-757, ISSN: 0022-0248

Conference paper

Johnson JC, Ballard IM, Barnham KWJ, Connolly JP, Mazzer M, Bessiere A, Calder C, Hill G, Roberts JSet al., 2007, Observation of photon recycling in strain-balanced quantum well solar cells, Applied Physics Letters, Vol: 90, Pages: 213505-213507

Photon recycling in strain-balanced quantum well solar cells grown on distributed Bragg reflectors has been observed as a suppression of the dark current and a change in electroluminescence spectra.Comparing devices grown with and without distributed Bragg reflectors we have demonstrated up to a 33% reduction in the ideality n=1 reverse saturation current. Furthermore, to validate the observations we demonstrate how both the measured dark currents and electroluminescence spectra fit very well to a photon recycling model. Verifying our observations with the model then allows us to calculate optimized device designs.

Journal article

Rohr C, Abbott P, Ballard I, Connolly JP, Barnham KWJ, Mazzer M, Button C, Nasi L, Hill G, Roberts JS, Clarke G, Ginige Ret al., 2006, InP-based lattice-matched InGaAsP and strain-compensated InGaAs/InGaAs quantum well cells for thermophotovoltaic applications, JOURNAL OF APPLIED PHYSICS, Vol: 100, ISSN: 0021-8979

Journal article

Mazzer M, Barnham KWJ, Ballard IM, Bessiere A, Ioannides A, Johnson DC, Lynch MC, Tibbits TND, Roberts JS, Hill G, Calder Cet al., 2006, Progress in quantum well solar cells, Symposium on Thin Film and Nanostructured Materials for Photovoltaics held at the 2005 EMRS Meeting, Publisher: ELSEVIER SCIENCE SA, Pages: 76-83, ISSN: 0040-6090

Conference paper

Farrell DJ, Chatten AJ, Buchemann A, Barnham KWJet al., 2006, Fabrication, Characterisation and Modelling of Quantum Dot Solar Concentrator Stacks, Proc. 4th World Conference on Solar Energy Conversion, Pages: 217-220

Conference paper

Barnham KWJ, Mazzer M, Clive B, 2006, Resolving the energy crisis: nuclear or photovoltaics?, NATURE MATERIALS, Vol: 5, Pages: 161-164, ISSN: 1476-1122

Journal article

Fuhrer MF, Bessiere A, Ballard IM, Johnson DC, Mazzer M, Barnham KWJ, Roberts JS, Airey R, Calder Cet al., 2006, Quasi Fermi Level Splitting and Evidence for Hot Carrier Effects in Strain-Balanced Quantum Well Concentrator Solar Cells at High Bias, Proc. 21st European Photovoltaic Solar Energy Conference, Pages: 160-163

Conference paper

Ioannides A, Tibbits TND, Connolly JP, Bushnell DB, Barnham KWJ, Calder C, Hill G, Roberts JS, Smekens G, Van Begin Jet al., 2006, Strain-balanced Quantum Well Monolithic Tandem Solar Cells, Proc. 21st European Photovoltaic Solar Energy Conference, Pages: 321-324

Conference paper

Chatten AJ, Farrell DJ, Buxton BF, Buchtemann A, Barnham KWJet al., 2006, Thermodynamic Modelling of Luminescent Solar Concentrators, Proc. 21st European Photovoltaic Solar Energy Conference

Conference paper

Tibbits TND, Ballard IM, Barnham KWJ, Johnson DC, Mazzer M, Roberts JS, Airey R, Foan Net al., 2006, Efficiency Enhancement of single juction GaAs Solar cells using Strain-balanced Quantum Well Structures under Concentration, Proc. 4th World Conference on Solar Energy Conversion, Pages: 861-864

Conference paper

Ballard IM, Mazzer M, Barnham KWJ, Tibbits TND, Lynch MC, Johnson DCet al., 2006, The Application of Multi-quantum Well Photovoltaics to Power Transmission using Fibre Optics, Proc. 21st European Photovoltaic Solar Energy Conference, Pages: 120-123

Conference paper

Ioannides A, Tibbits TND, Connolly JP, Bushnell DB, Barnham KWJ, Calder C, Hill G, Roberts JS, Smekens Get al., 2006, Strain Balanced Quantum Well Monolithic Tandem Solar cells, Proc. 4th World Conference on Solar Energy Conversion, Pages: 753-756

Conference paper

Lynch MC, Ballard IM, Bessiere A, Calder C, Connolly JP, Hill G, Johnson DC, Roberts JS, Stavrinou PN, Barnham KWJet al., 2006, Modelling the Confined States in multi-Quantum Well Solar Cells, Proc. 4th World Conference on Solar Energy Conversion, Pages: 67-70

Conference paper

Johnson DC, ballard IM, Barnham KWJ, Mazzer M, Tibbits TND, Roberts JS, Hill G, Calder Cet al., 2006, Optimisation of Photon Recycling Effects in Strain-Balanced Quantum Well Solar Cells, Proc. 4th World Conference on Solar Energy Conversion, Pages: 26-31

Conference paper

Farrell DJ, Chatten AJ, Buechtemann A, Barnham KWJet al., 2006, Fabrication, characterisation & modelling of quantum dot solar concentrator stacks, 4th World Conference on Photovoltaic Energy Conversion, Publisher: IEEE, Pages: 217-220, ISSN: 2159-2330

Conference paper

Barnham, K W J, Ballard I, Bessiere A, Chatten A J, Connolly J P, Ekins-Daukes N J, Johnson D C, Lynch M C, Mazzer M, Tibbits, T N D, Hill G, Roberts J S, Malik M Aet al., 2006, Quantum well solar cells and quantum dot concentrators, Nanostructured Materials for Solar Energy Conversion, Pages: 517-538, ISBN: 9780444528445

Book chapter

Johnson DC, Ballard IM, Barnham KWJ, Mazzer M, Tibbits TND, Roberts JS, Hill G, Calder Cet al., 2006, Optimisation of photon recycling effects in strain-balanced quantum well solar cells, 4th World Conference on Photovoltaic Energy Conversion, Publisher: IEEE, Pages: 26-31, ISSN: 2159-2330

Conference paper

Slooff LH, Kinderman R, Burgers AR, Buechtemann A, Danz R, Meyer TB, Chatten AJ, Farrell D, Barnham KWJ, van Roosmalen JAMet al., 2006, The luminescent concentrator illuminated, Conference on Photonics for Solar Energy Systems, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X

Conference paper

Rohr C, 2006, InP-based lattice-matched InGaAsP and strain-compensated InGaAs/InGaAs quantum well cells for thermophotovoltaic applications, Journal of Applied Physics, Vol: 100

Journal article

Lynch MC, Ballard IM, Bessiere A, Calder C, Connolly JP, Hill G, Johnson DC, Roberts JS, Stavrinou PN, Barnham KWJet al., 2006, Modelling the confined states in multi quantum well solar cells, 4th World Conference on Photovoltaic Energy Conversion, Publisher: IEEE, Pages: 67-70, ISSN: 2159-2330

Conference paper

Begotti M, Longo M, Magnanini R, Tarricone L, Gombia E, Mosca R, Lynch M, Barnham K, Mazzer M, Hill Get al., 2005, Electrical and photoelectrical properties of a GaAs-based p-i-n structure grown by MOVPE, Crystal Research and Technology, Vol: 40, Pages: 1033-1038, ISSN: 0232-1300

Journal article

Schwarzman A, Grunbaum E, Strassburg E, Lepkifker E, Boag A, Rosenwaks Y, Glatzel T, Barkay Z, Mazzer M, Barnham Ket al., 2005, Nanoscale potential distribution across multiquantum well structures: Kelvin probe force microscopy and secondary electron imaging, JOURNAL OF APPLIED PHYSICS, Vol: 98, ISSN: 0021-8979

Journal article

Rimada JC, Hernandez L, Connolly JP, Barnham KWJet al., 2005, Quantum and conversion efficiency calculation of AlGaAs/GaAs multiple quantum well solar cells, 17th Latin American Symposium on Solid State Physics, Publisher: WILEY-V C H VERLAG GMBH, Pages: 1842-1845, ISSN: 0370-1972

Conference paper

Johnson DC, Ballard I, Barnham KWJ, Bishnell DB, Connolly JP, Lynch MC, Tibbits TND, Ekins-Daukes NJ, Mazzer M, Airey Ret al., 2005, Advances in Bragg stack quantum well solar cells, Solar Energy Materials and Solar Cells, Vol: 87, Pages: 169-179, ISSN: 0927-0248

Journal article

Lynch MC, Ballard IM, Bushnell DB, Connolly JP, Johnson DC, Tibbits TND, Barnham KWJ, Ekins-Daukes NJ, Roberts JS, Hill G, Airey R, Mazzer Met al., 2005, Spectral response and I-V characteristics of large well number multi quantum well solar cells, International Conference on Physics, Chemistry and Engineering of Solar Cells, Publisher: SPRINGER, Pages: 1445-1449, ISSN: 0022-2461

Conference paper

Nasi L, Ferrari C, Lanzi A, Lazzarini L, Balboni R, Clarke G, Mazzer M, Rohr C, Abbott P, Barnham KWJet al., 2005, Wavy growth onset in strain-balanced InGaAs multi-quantum wells, JOURNAL OF CRYSTAL GROWTH, Vol: 274, Pages: 65-72, ISSN: 0022-0248

Journal article

Tibbits TND, Ballard IM, Barnham KWJ, Connolly J, Roberts JS, Hill G, Calder Cet al., 2005, Inverted Strain-balanced Quantum-well Solar Cells for Tandem Structures, Proc. 20th European Photovoltaic Solar Energy Conference, Pages: 74-77

Conference paper

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