N-type P-doped polycrystalline diamond

Here we present first data on P-doped polycrystalline diamond prepared by in-situ doping with phosphine. By optimisation of the growth conditions and use of polished polycrystalline CVD diamond plates we were able to incorporate P actively in the grains of polycrystalline films and to prepare n-type diamond, as confirmed by Hall measurements. We studied the P-incorporation in variously oriented grains by cathodoluminescence. (© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)