Publications and Conferences
Refereed Journals
(Click on the links for access to PDF versions)
Diamond-metal contacts: in-situ and real-time characterisation
D A Evans, O R Roberts, G T Williams, A R Vearey-Roberts, F Bain, S Evans, D P Langstaff, D J Twitchen,
J. Phys.: Condens. Matter. 21, 364223 (2009)
Progress on the Aberystwyth electron counting array
D P Langstaff, D A Evans, O R Roberts, X Zhu
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 604 1-2, 133-135 (2009)
Reduction of multiple triggering in counting detectors
X Zhu and D P Langstaff
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 604 (1-2), 400-403
(2009)
Direct Observation of Schottky to ohmic transition in Al-diamond contacts using real-time photoelectron spectroscopy
D A Evans, O R Roberts, A R Vearey-Roberts, D P Langstaff, D J Twitchen, M Schwitters
Appl Phys Lett 91, 132114 (2007)
A multichannel detector array with 768 pixels developed for electron spectroscopy
D P Langstaff, and T Chase
Nuclear Instruments and Methods In Physics Research Section A - Accelerators Spectrometers Detectors And Associated Equipment, 573 (1-2) 169-171 (2007)
Locating hexagonal and cubic phases in boron nitride using wavelength-selective optically detected x-ray absorption spectroscopy
D A Evans, A R Vearey-Roberts, N R J Poolton
Appl Phys Lett 89,161107 (2006)
Synchrotron-laser interactions in hexagonal boron nitride: a examination of charge trapping dynamics at the boron K-edge
N R J Poolton, B M Towlson, D A Evans, B Hamilton
New J Phys 8, 76
(2006)
New instrumentation for micro-imaging X-ray absorption spectroscopy using optical detection methods
N R J Poolton, B M Towlson, B Hamilton, D A Evans
Nucl Inst Methods B 246, 445-451 (2006)
Internal structure of copper(II)-phthalocyanine thin films on SiO2/Si substrates investigated by grazing incidence X-ray reflectometry
A C Brieva, T E Jenkins, D G Jones, F Stroessner, D A Evans, G F Clarke
J Appl Phys 99, 073504
(2006)
Soft x-ray photoelectron spectroscopy of metal phthalocyanines on the (001) surface of GaAs and Ge
G Cabailh, B N Holland, C Stephens, I T McGovern, C McGuinness, A Cafolla, A R Vearey-Roberts, D A Evans
J de Physique IV 132, 11-15
(2006)
Synchrotron radiation studies of phthalocyanine-based organic-inorganic interfaces
D A Evans
J Pthal and Porphyrins (2006)
Modification of GaAs Schottky diodes by thin organic interlayers
A R Vearey-Roberts and D A Evans
Appl Phys Lett 86, 072105
(2005)
A fully integrated multi-channel detector for electron spectroscopy
D P Langstaff, A Bushell, T Chase, D A Evans
Nucl Inst Meth B 238 1-4, 219-223 (2005)
A New Method for Synchrotron-Laser Pump-Probe Spectroscopy Applied to Optical-Detection of X-ray Absorption in Wide Band-Gap Solids
N R J Poolton, B Hamilton, D A Evans,
J Phys D:Appl Phys 38, 1478-1484 (2005)
An XPS study of the interaction between tin (II) phthalocyanine and polycrystalline iron
J W Wells, G Cabailh, D A Evans, S Evans, A Bushell, A R Vearey-Roberts
J Elect Spectrosc Rel Phen, 141, 67-72
(2004)
Growth and morphology of SnPc films on the S-GaAs(001) surface: A combined XPS, AFM and NEXAFS study
A R Vearey-Roberts, H J Steiner, A Bushell, S Evans, I Cerrillo, J Mendez, G Cabailh, S J O’Brien, J W Wells, I T McGovern, D A Evans
Appl Surf Sci 234, 131-137
(2004)
Synchrotron radiation studies of the growth of tin-phthalocyanine on GaAs(001)-1x6 substrates
G Cabailh, J W Wells, I T McGovern, A R Vearey-Roberts, A Bushell, D A Evans
Appl Surf Sci 234,144 (2004)
The interfacial structure of annealed alumina –zirconia – silicate nanoceramics
D Le Messurier, N Sissouno, A R Vearey-Roberts, S Evans, D A Evans, R Winter
Mat Sci Technol 20, 975-979 (2004)
Copper Phthalocyanine on InSb(111)A – interface bonding, growth mode and energy band alignment D A Evans, H J Steiner, S Evans, R Middleton, T S Jones, S Park, Th Kampen, D R T Zahn, G Cabailh, I T McGovern
J Phys: Condens Mat 15, S2729 -S2740 (2003)
Electronic properties of interfaces between perylene derivatives and inorganic/organic semiconductor interfaces
T U Kampen, G Gavrila, H Méndez, D R T Zahn, A R Vearey-Roberts, D A Evans, J Wells, I McGovern, W Braun
J Phys: Condens Mat 15, S2679-S2692 (2003)
Soft X-ray photoelectron spectroscopy of the tin-phthalocyanine / GaAs (001)1x6 interface formation
G Cabailh, J W Wells, I T McGovern, V R Dhanak, A R Vearey-Roberts, A Bushell, D A Evans
J Phys: Condens Mat 15, S2741-S2748
(2003)
Perylenes and Phthalocyanines on GaAs(001) surfaces
D A Evans, H J Steiner, A R Vearey-Roberts, V Dhanak, G Cabailh, S O’Brien, I T McGovern, W Braun, T U Kampen, S Park, D R T Zahn
Appl Surf Sci 212-213, 417-422 (2003)
Synchrotron Radiation Studies of Inorganic-Organic Semiconductor Interfaces
D A Evans, H J Steiner, A R Vearey-Roberts, A Bushell, G Cabailh, S O’Brien, J W Wells, I T McGovern, V Dhanak, T U Kampen, D R T Zahn, D Batchelor
Nucl Inst Meth B 199, 475-480
(2003)
In-situ monitoring of the growth of copper phthalocyanine films on InSb by Organic Molecular Beam Deposition
D A Evans, H J Steiner, R Middleton, T S Jones, H Chen, K Horn, S Park, Th Kampen, D Tenne, D R T Zahn, A Patchett, I T McGovern
Appl Surf Sci 175-176, 374-378
(2001)
A detailed surface phase diagram for ZnSe MBE growth and ZnSe/GaAs(100) interface studies
D Wolfframm, D A Evans, D I Westwood, J Riley
J Crystal Growth 216, 119-126
(2000)
X-ray standing wave of wet-etch sulphur-treated InP(001) surfaces
I T McGovern, A Koebbel, A Leslie, E Dudzik, C E J Mitchell, A B McLean, A Patchett, D R T Zahn, D A Evans, D P Woodruff, B C C Cowie
Appl Surf Sci 166, 196-200 (2000)
Gold and silver Schottky barriers on ZnS(110)
D Wolfframm, D A Evans, G Neuhold, K Horn
J Appl Phys 87, 3905-3911
(2000)
GaN cleaning by Ga deposition, reduction and re-evaporation: an SXPS study
T G G Maffeis, S A Clark, P R Dunstan, S P Wilks, D A Evans, F Peiro, H Riechert, P J Parbrook
Phys Stat Sol A 176, 751-754 (1999)
Angular-resolved study of secondary-electron emission from NEA diamond surfaces
M Lübbe, D A Evans, T U Kampen, K Okano, D R T Zahn
Diamond Relat Mater 8, 1485-1489
(1999)
Electronic band structure of zinc blende
S R Barman, S A Ding, G Neuhold, K Horn, D Wolfframm, D A Evans
Phys Rev B 58, 7053-7058 ( 1998)
Interpretation of reflectance anisotropy spectroscopy spectra of ZnSe(001) grown on GaAs(001) in terms of bulk, interface, and surface contributions
A M Frisch, C Schultz, T Herrmann, V Emiliani, D Wolfframm, D A Evans, M Korn, U Rossow, N Esser, W Richter
J Vac Sci Technol B 16, 2350-2354 (1998)
The surface valence band structure of the two phases of ZnSe (100)
J Y Xue, A P J Stampfl, D Wolfframm, D A Evans, M Hollering, L Ley, J D Riley, R C G Leckey
Surf Sci 401, L401-L405 (1998)
ZnSe metal organic vapour-phase epitaxy on GaAs: substrate preparation as the limiting factor in ZnSe growth
D N Gnoth , T L Ng, I B Poole , D A Evans, N Maung, A C Wright
J Crystal Growth 185, 1338
(1998)
Electronic band structure of cubic CdSe determined by angle-resolved photoemission: Cd 4d and valence-level states
K O Magnusson, G Neuhold, K Horn, D A Evans
Phys Rev B 57, 8945-8950 (1998)
Charge transfer and redistribution in the formation of the K / GaP (110) interface: a photoelectron spectroscopy study
S D'Addato, P Bailey, J M C Thornton and D A Evans
J Phys:Condens Matter 10, 2861-2871 (1998)
A comparison of S-passivation of III-V (001) surfaces using (NH4)2Sx and S2Cl2
D N Gnoth, D Wolfframm, A Patchett, S Hohenecker, D R T Zahn, A Leslie, I T McGovern, D A Evans
Appl Surf Sci 123-124, 120-125 (1998)
Influence of surface reconstruction on Pb-ZnSe interface formation
D Wolfframm, D N Gnoth, M Evans, K Prince, D Westwood, D A Evans
Appl Surf Sci 123-124, 575-579
(1998)
Conference Proceedings and Reports
Real-time photelectron spectroscopy of diamond surfaces and interfaces
D A Evans [Invited Talk]
60th Diamond Conference, Warwick, UK (2009)
Optically-detected X-ray Absorbtion Spectroscopy (OD-XAS) and X-ray Excited Optical Luminescence (XEOL) studies of banded diamonds
G O Jones, D A Evans, N Poolton, P Martineau, D Fisher, S Lawson
60th Diamond Conference, Warwick, UK (2009)
Thermoluninescence (TL) stuides of HPHT treated and untreated type IIa diamonds
G O Jones, D A Evans, N Poolton, A J J Bos, P Martineau, D Fisher, S Lawson
60th Diamond Conference, Warwick, UK (2009)
Real-time photoelectron spectroscopy for the study of surface and interface processes in carbon-based semiconductors
D A Evans [Invited Talk]
12th International Conference on the Formation of Semiconductor Interfaces (ICFSI-12) Weimar, Germany (2009)
Probing Evolving Interface Energetics and Film Morphology During the Growth of Organic Photovoltaic Device Structure
G T Williams, O R Roberts, D P Langstaff, D A Evans
12th International Conference on the Formation of Semiconductor Interfaces (ICFSI-12) Weimar, Germany (2009)
Modification and Real-time Characterisation of Hybrid Inorganic-organic Semiconductor Diodes
O R Roberts, A R Vearey-Roberts, G T Williams, D P Langstaff, D A Evans
International Conference on Materials for Advanced Technologies (ICMAT 2009), Singapore
Real-time Photoelectron Spectroscopy Applied to Thin Film Growth and Temperature-dependent Processing in Diamond Electronics
D P Langstaff, D A Evans, A R Vearey-Roberts, O R Roberts, S Evans, G T Williams, D Twitchen
International Conference on Materials for Advanced Technologies (ICMAT 2009), Singapore
Probing Evolving Interface Energetics and Film Morphology During the Growth of Organic Photovoltaic Device Structure
G T Williams, O R Roberts, D P Langstaff, D A Evans
International Conference on Materials for Advanced Technologies (ICMAT 2009), Singapore
Optically-detected X-ray Absorption Spectroscopy (OD-XAS) and X-ray Excited Optical Luminescence (XEOL) studies of natural and synthetic banded diamond
D A Evans, G O Jones, N Poolton, P Martineau, D Fisher, S Lawson
Hasselt Diamond Workshop (SBDD XIV), Hasselt, Belgium (2009)
Real-time Spectroscopy at MPW6.1: Application to the Fabrication of Organic Devices
G T Williams, O R Roberts, D P Langstaff, D A Evans, V R Danak, G Miller
UK SR User Meeting, Daresbury (2008)
Imaging X-ray Absorbtion and Optical Luminescence Studies of Diamond
G O Jones, D A Evans, A G McGlynn, S Evans, N R J Poolton, V R Dhanak, P Martineau, S Lawson, D Fisher
UK SR User Meeting, Daresbury (2008)
Measurement of energy band alignment and thin film morphology in an organic photovoltaic cell structure
using photoelectron spectroscopy
D A Evans
Excitonic Solar Cell Conference, Warwick (2008)
Progress on the Aberystwyth Electron Counting Array
D P Langstaff, D A Evans, O R Roberts, X Zhu
8th International Conference on Position Sensitive Detectors, Glasgow (2008)
Reduction of Multiple Triggering in Counting Detectors
X Zhu, D P Langstaff
8th International Conference on Position Sensitive Detectors, Glasgow, (2008)
Optical detection of x-ray absorption: a direct link between chemistry, structure and luminescence
N R J Poolton
Synchrotron Radiation in Materials Science (SRMS 6), Brazil (2008)
Detecting sp2 bonded carbon in natural and synthetic diamond using Optically-Detected X-ray Absorbtion Spectroscopy
D A Evans, G O Jones, N R J Poolton, A G McGlynn, O R Roberts, G T Williams, S Evans, P Martineau, S Lawson, D Fisher
59th Diamond Conference Abstracts, Oxford (2008)
Growth and morphology of SnPc films on GaAs(001) surfaces and their role as organic modifiers of diode performance
D A Evans, A R Vearey-Roberts, O R Roberts, D P Langstaff
ICSFS-14 Dublin (2008) Mon-CL-20
Diamond-metal contact formation monitored by real-time electron spectroscopy
O R Roberts, D A Evans, A R Vearey-Roberts, S Evans, D P Langstaff, D Twitchen
ICSFS-14, Dublin (2008) Tue-P-49
Energy band alignment and thin film morphology in an organic photovoltaic cell structure
G T Williams, O R Roberts, S Evans, D P Langstaff, D A Evans
ICSFS-14, Dublin (2008) Tue-P-50
OLEDs - the Future of Architectural Lighting
D A Evans [Invited Talk]
UK Display and Lighting KTN, London (2008)
The Design, Operation and Application of an electron counting detector for photoemission spectroscopy D P Langstaff [Invited Talk]
NSLS-User Meeting and Workshops, Brookhaven NY (2008)
Organic Semiconductor Interfaces and Devices
D A Evans [Invited Talk]
CLEO/QELS 08, San Jose, California (2008)
Optically detected X-ray absroption spectroscopy and X-ray excited optical luminescence studies of diamond and boron nitride
D A Evans, A R Vearey-Roberts, A G McGlynn, N Poolton, D J Twitchen, P M Martienau, D Fisher, S Lawson Hasselt Diamond Workshop (SBDD XVIII), Hasselt, Belgium (2008)
Real-time studies of diamond using a new multi channel array detector
O R Roberts, D A Evans, D P Langstaff, A Bushell, A R Vearey-Roberts
1st CAFMaD Seminar, Aberystwyth (2007)
Imaging X-ray Absorption and Optical Luminescence Stuides of Diamond and Boron Nitride
D A Evans, G O Jones, A McGlynn, N Poolton, P Martineau, S Lawson, D Fisher
58th Diamond Conference, Warwick (2007)
D A Evans
Organic Semiconductor workshop, OPTIC Technium, St Asaph (2006)
D A Evans
Synchrotron Radiation in Wales, Aberystwyth (2006)
Optically-detected X-ray Absorption Spectroscopy (ODXAS) and X-ray Excited Optical Luminescence (XEOL) studies of diamond and boron nitride
D A Evans, A R Vearey-Roberts, A McGlynn, N Poolton, D Twitchen, M Schwitters, P Martineau, D Fisher
Diamond Conference Abstracts (2006)
768 channel detector for synchrotron photoemission spectroscopy
D P Langstaff, T Chase, O R Roberts, A McGlynn, D A Evans
Proc SRMS-5 (2006)
Metal-diamond contacts: in-situ fabrication and characteristation
D A. Evans, A R Vearey-Roberts, A Bushell, S Evans, T Chase, D P Langstaff,
Proceedings of the 1st International Conference on Industrial Diamonds (2005)
Growth of Metal-Phthalocyanine on GaAs(001): a NEXAFS study
G Cabailh, I T McGovern, A Vearey-Roberts, A Bushell, D A Evans
Proc SPIE 5826, 37-43 (2005)
Identifying sp2 and sp3 carbon species in diamond using synchrotron x-ray absorption spectroscopy
D A Evans, A R Vearey-Roberts, N Poolton, D Twitchen, M Schwitters
Diamond Conference Abstracts (2005)
Electrical characterisation of Al Schottky contacts on CVD-grown single crystal p-type diamond
D A Evans, A R Vearey-Roberts, S Jones, S Evans, D Twitchen, M Schwitters
Diamond Conference Abstracts (2005)
Real-time Electron Spectroscopy using synchrotron radiation
D A Evans and D P Langstaff
SRS Annual Report (2005)
Using thin films of organic semiconductors to control the barrier height of GaAs diodes
A R Vearey-Roberts and D A Evans
WOCSDICE Proceedings (2005)
The role of surface species on the diamond (111) surface in silver-diamond Schottky barrier formation
D A Evans, A Bushell, D P Langstaff, K Birkinshaw, S Evans
Diamond Conference Abstracts (2004) P22.1
Metal adsorption and reaction on cBN microcrystal surfaces
D A Evans, S Evans, J Steiner, O R Roberts, S Wade, I ap Gwynn
Diamond Conference Abstracts (2003) P21.1-P21.2
Surface composition and morphology of c-BN and diamond microcrystals
S Evans, A Bushell, S Wade, I ap Gwynn, D A Evans
Diamond Conference Abstracts (2002) P32.1-P32.3
Organic Semiconductors
D A Evans
Daresbury Laboratory Annual Report Highlights 2001-2002
Metal Interfaces with cBN
D A Evans, S Evans, J W Wells, E Weißmantel, F Richter
Diamond Conference Abstracts (2001) 37.1-37.4
c-BN surfaces – annealing and alkali metal adsorption
D A Evans, S Evans, A Burgess, J W Wells, E Weißmantel, F Richter
Diamond Conference Abstracts (2000) P8.1-P8.4
Modification of natural and CVD diamond surfaces by alkali metal adsorption
D A Evans, S Evans, M Lübbe, T U Kampen, K Okano, DRT Zahn
Diamond Conference Abstracts (1999) P15.1-P15.4
The CuPc – InSb interface – initial growth and band-offset measurement
D A Evans, H J Steiner, R Middleton, T S Jones, H Chen, K Horn, S G Park, Th Kampen, D R T Zahn
BESSY Yearbook (1999)
Gold and silver Schottky barriers on ZnS(110)
D Wolfframm, D A Evans, G Neuhold, K Horn
BESSY Yearbook (1999)
The caesiated diamond (111) surface studied by XPS, UPS and LEED
D A Evans, S Evans, M Lübbe, T U Kampen, D R T Zahn
Diamond Conference Abstracts (1998) 5.1-5.3
Electronic band structure of zincblende
S Barnman, S A Ding, G Neuhold, K Horn, D Wolfframm, D A Evans
BESSY Yearbook (1997)
Pb-ZnSe Interface Formation
D A Evans, D Wolfframm, D N Gnoth, M Evans, K Prince
Sinctrotrone Trieste Annual Report (1997)
The effect of initiation conditions on the growth of ZnSe epilayers on GaAs substrates by MOVPE: a study by Transmission Electron Microscopy and Reflectance Anisotropy Spectroscopy
D N Gnoth, T L Ng, D A Evans, I B Poole, N Maung, A C Wright
MOVPE Workshop, Berlin (1997)