Dr Keith Heasman

Ion Beam Processing Research Fellow

Qualifications: Bsc, PhD, Surrey

Email: k.heasman@surrey.ac.uk
Phone: Work: 01483 68 2214
Room no: 17 NC 00

Biography
Research
Publications

Biography

Keith graduated with a First Class BSc in Physics from the University of Surrey in 1981, and subsequently obtained his PhD in 1985 from the Optoelectronics group in the same department having carried out research on the temperature and pressure dependence of bulk and multi quantum well GaInAsP / InP semiconductor materials, Gunn diodes, LED’s and Lasers. Following post graduate studies in the physics department on strained and unstrained quantum well lasers and then as the Philips Fellow in the Electrical Engineering department of the University of Surrey researching Erbium ion implantation into GaAlAs / GaAs quantum well structures Keith left Surrey University and between 1988 and 2004 he was employed as a physicist by BP and subsequently BP Solar, working in silicon solar cell research and development. In 2004 he joined Narec to initially set up the PV Technology Centre and then to enable it to grow and become the world’s leading supplier of bespoke silicon concentrator cells. Whilst with BP Solar and Narec, Keith contributed to numerous European and UK funded research projects as well as running, and maintaining several characterisation laboratories dedicated to supporting the companies silicon solar cell manufacturing operations. Keith joined the Surrey Ion Beam Centre as the EPSRC funded Ion Implantation Research Fellow in February 2012.

Research Interests

Photovoltaics, Concentrated Photovoltaics, Design, fabrication and characterisation of silicon solar cells, Ion Implantation, Optoelectronics, Semiconductor Lasers, Silicon photonics

Research Collaborations

Current and previous collaborators include:
Philips Research Laboratories, Fraunhofer Institute for Solar Energy Systems ISE, ENEA Portici, Whitfield Solar, Solar Energy Institute of the Technical University of Madrid, University of Konstanz, Centre for Renewable Energy Systems Technology Loughborough University, Heriot-Watt University, University of Exeter

Publications

Journal articles

Baig H, Sarmah N, Mallick TK, Heasman KC. (2013) 'Numerical modelling and experimental validation of a low concentrating photovoltaic system'. Solar Energy Materials and Solar Cells, 113, pp. 201-219.
doi: 10.1016/j.solmat.2013.01.035
Baig H, Mallick TK, Heasman KC. (2012) 'Non-uniform illumination in concentrating solar cells'. Renewable and Sustainable Energy Reviews, 16 (8), pp. 5890-5909.
doi: 10.1016/j.rser.2012.06.020
Cole A, Baistow I, Brown L, Devenport S, Drew K, Heasman KC, Morrison D, Bruton TM, Serenelli L, De Iuliis S, Izzi M, Tucci M, Salza E, Pirozzi L. (2011) 'Silicon based photovoltaic cells for concentration-research and development progress in laser grooved buried contact cell technology'. AIP Conference Proceedings, 1407, pp. 46-49.
doi: 10.1063/1.3658292
Timò G, Martinelli A, Minuto A, Schineller B, Sagnes I, Jakomin R, Beaudoin G, Gogneau N, Noack M, Padovani S, Borshchov S, Kenny R, Sarno A, Georghiou GE, Zurru P, Sturm M, Wild-Scholten M, Bellia G, Gigliucci G, Medina E, Heasman K, Martinelli G. (2009) 'First results on the APOLLON project multi-approach for high efficiency integrated and intelligent concentrating PV modules (systems)'. Conference Record of the IEEE Photovoltaic Specialists Conference, , pp. 002424-002429.
doi: 10.1109/PVSC.2009.5411295
Cole A, Heasman KC, Mellor A, Roberts S, Bruton TM. (2007) 'Laser grooved buried contact solar cells for concentration factors up to 100x'. Conference Record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4, 1, pp. 834-837.
doi: 10.1109/WCPEC.2006.279586
Bruton T, Roberts S, Mason N, Heasman K. (2005) 'Low cost, 100X point focus silicon concentrator cells made by the LGBC process'. Conference Record of the IEEE Photovoltaic Specialists Conference, , pp. 647-650.
Anton I, Sala G, Heasman K, Kern R, Bruton TM. (2003) 'Performance prediction of concentrator solar cells and mdules from dark I-V characteristics'. JOHN WILEY & SONS LTD PROGRESS IN PHOTOVOLTAICS, 11 (3), pp. 165-178.
doi: 10.1002/pip.477
Tang YS, Zhang J, Heasman KC, Sealy BJ. (1989) 'Lattice locations of erbium implants in silicon'. Solid State Communications, 72 (10), pp. 991-993.
TANG YS, HEASMAN KC, GILLIN WP, SEALY BJ. (1989) 'CHARACTERISTICS OF RARE-EARTH ELEMENT ERBIUM IMPLANTED IN SILICON'. AMER INST PHYSICS APPLIED PHYSICS LETTERS, 55 (5), pp. 432-433.
doi: 10.1063/1.101888
BLOOD P, FLETCHER ED, WOODBRIDGE K, HEASMAN KC, ADAMS AR. (1989) 'INFLUENCE OF THE BARRIERS ON THE TEMPERATURE-DEPENDENCE OF THRESHOLD CURRENT IN GAAS ALGAAS QUANTUM WELL LASERS'. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC IEEE JOURNAL OF QUANTUM ELECTRONICS, 25 (6), pp. 1459-1468.
doi: 10.1109/3.29281
HEASMAN KC, BLOOD P, ADAMS AR, FLETCHER ED. (1987) 'PRESSURE-DEPENDENCE OF THE NONRADIATIVE LIFETIME IN GAAS/AIGAAS DOUBLE-HETEROSTRUCTURE LASERS'. AMER INST PHYSICS JOURNAL OF APPLIED PHYSICS, 62 (8), pp. 3448-3450.
doi: 10.1063/1.339313
HEASMAN KC, ADAMS AR, PLUMB RG. (1987) 'SCANNING THE LASER GAIN SPECTRUM USING DISTRIBUTED FEEDBACK AND HYDROSTATIC-PRESSURE'. IEE-INST ELEC ENG ELECTRONICS LETTERS, 23 (11), pp. 555-557.
doi: 10.1049/el:19870398
HEASMAN KC, ADAMS AR, GREENE PD, HENSHALL GD. (1987) 'PRESSURE-DEPENDENCE OF THRESHOLD CURRENT AND CARRIER LIFETIME IN 1.55-MU-M GAINASP LASERS'. IEE-INST ELEC ENG ELECTRONICS LETTERS, 23 (10), pp. 492-493.
doi: 10.1049/el:19870357
OREILLY EP, HEASMAN KC, ADAMS AR, WITCHLOW GP. (1987) 'CALCULATIONS OF THE THRESHOLD CURRENT AND TEMPERATURE SENSITIVITY OF A (GAIN)AS STRAINED QUANTUM-WELL LASER OPERATING AT 1.55 MU-M'. ACADEMIC PRESS LTD SUPERLATTICES AND MICROSTRUCTURES, 3 (2), pp. 99-102.
doi: 10.1016/0749-6036(87)90038-3
HEASMAN KC, HAYES J, ADAMS AR, GREENE PD. (1981) 'TEMPERATURE-DEPENDENCE OF THE TRANSFERRED ELECTRON THRESHOLD CURRENTIN IN1-XGAXASYP1-Y'. IEE-INST ELEC ENG ELECTRONICS LETTERS, 17 (20), pp. 756-757.
doi: 10.1049/el:19810531

Conference papers

Claudio G, Bass K, Heasman K, Cole A, Roberts S, Watson S, Boreland M. (2009) 'Surface passivation by silicon nitride in Laser Grooved Buried Contact (LGBC) silicon solar cells'. ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD SUPERLATTICES AND MICROSTRUCTURES, Toledo, SPAIN: 9th International Workshop on Beam Injection Assessment of Microstructure in Semiconductors 45 (4-5), pp. 234-239.
doi: 10.1016/j.spmi.2008.10.044
Devenport S, Roberts S, Heasman KC, Cole A, Tregurtha D, Bruton TM, IEEE . (2008) 'PROCESS OPTIMISATION FOR COLOURED LASER GROOVED BURIED CONTACT SOLAR CELLS'. PVSC: 2008 33RD IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, VOLS 1-4, , pp. 414-417.
Hartley ON, Russell R, Heasman KC, Mason NB, Bruton TM. (2002) 'Investigation of thin aluminium films on the rear of monocrystalline silicon solar cells for back surface field formation'. IEEE CONFERENCE RECORD OF THE TWENTY-NINTH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE 2002, NEW ORLEANS, LA: 29th IEEE Photovoltaic Specialists Conference, pp. 118-121.
doi: 10.1109/PVSC.2002.1190470
Bruton TM, Sherborne J, Heasman KC, Ramsdale CM. (2002) 'Concepts for the manufacture of silicon solar cell modules for use in concentrating systems up to 5x.'. IEEE CONFERENCE RECORD OF THE TWENTY-NINTH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE 2002, NEW ORLEANS, LA: 29th IEEE Photovoltaic Specialists Conference, pp. 1366-1368.
doi: 10.1109/PVSC.2002.1244838
Bruton TM, Roberts S, Heasman KC, Russell R, Warta W, Glunz SW, Dicker J, Knobloch J. (2000) 'Prospects for high efficiency silicon solar cells in thin Czochralski wafers using industrial processes'. IEEE CONFERENCE RECORD OF THE TWENTY-EIGHTH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE - 2000, ANCHORAGE, AK: 28th IEEE Photovoltaic Specialists Conference, pp. 180-183.
doi: 10.1109/PVSC.2000.915784
BRUTON TM, HEASMAN KC. (1993) 'THE ACHIEVEMENT OF 20-PERCENT EFFICIENCY IN A CZ SILICON SOLAR-CELL UNDER CONCENTRATION'. I E E E CONFERENCE RECORD OF THE TWENTY THIRD IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE - 1993, LOUISVILLE, KY: 23rd IEEE Photovoltaic Specialists Conference, pp. 1250-1251.
doi: 10.1109/PVSC.1993.346942