pss applications and materials science a status solidi www.pss-a.com physica REPRINT Electrical transport measurements and emission properties of freestanding single crystalline CVD diamond samples W. Deferme 1 , A. Bogdan 1 , G. Bogdan 1 , K. Haenen 1, 2 , W. De Ceuninck 1, 2 , and M. Nesládek 1, 2, 3 1 Hasselt University, Institute for Materials Research (IMO), Wetenschapspark 1, 3590 Diepenbeek, Belgium 2 IMEC vzw, division IMOMEC, Wetenschapspark 1, 3590 Diepenbeek, Belgium 3 CEA/Saclay, LIST (CEA-Recherche Technologique)/DETECS/SSTM/LTD, Gif-sur-Yvette, France Received 21 June 2007, revised 2 August 2007, accepted 2 August 2007 Published online 4 September 2007 PACS 73.50.Dn, 73.61.Cw, 78.60.Fi, 78.68.+ m, 81.05.Uw In this work time-of-flight (TOF) measurements are performed on freestanding single crystalline (100) CVD diamond layers with different surface terminations. The transit properties and electron and hole mo- bility are measured for completely oxidised and completely hydrogenated diamonds. The results clearly show that the different terminations of the diamond surface have an influence on the electrical transport properties. Furthermore, evidence is given that oxygen-induced surface states influence the TOF spectra. Light emission at 235 nm and around 430 nm is observed when applying a pulsed electric field on the diamond. The small peak at 235 nm is attributed to free exciton recombination while the broad band at 430 nm is contributed to A-band luminescence. Emission spectra at voltages as high as 1.4 V/μm are given and compared. phys. stat. sol. (a) 204, No. 9, 3017 – 3022 (2007) / DOI 10.1002/pssa.200776343