Photoconductive properties of single-crystal CVD diamond

A single‐crystal homoepitaxial CVD diamond film, grown on a Ib‐type diamond substrate, was analysed using optical and electro‐optical measurements. The type and the distribution of its crystalline defects are discussed in connection with its photoconductive response to deep UV light. A similar devic...

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Veröffentlicht in:	Physica status solidi. A, Applied research Applied research, 2003-09, Vol.199 (1), p.113-118
Hauptverfasser:	Brescia, R., De Sio, A., Donato, M. G., Faggio, G., Messina, G., Pace, E., Pucella, G., Santangelo, S., Sternschulte, H., Verona Rinati, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	78.30.Am 78.55.Ap Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronic transport phenomena in thin films and low-dimensional structures Elemental semiconductors and insulators Exact sciences and technology Infrared and raman spectra and scattering Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Photoconduction and photovoltaic effects Photoconduction and photovoltaic effects photodielectric effects Physics
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Zusammenfassung:	A single‐crystal homoepitaxial CVD diamond film, grown on a Ib‐type diamond substrate, was analysed using optical and electro‐optical measurements. The type and the distribution of its crystalline defects are discussed in connection with its photoconductive response to deep UV light. A similar device based on a high quality polycrystalline CVD diamond was also analysed using the same techniques in order to compare the results. Raman spectroscopy and photoluminescence (PL) have been used to assess the crystalline quality and to study the distribution of defects in the films, respectively. The results of the electro‐optical measurements show that the single crystal diamond has very high responsivity and signal‐to‐noise ratio. Hence, the role of defects on the detection performance is discussed. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:	0031-8965 1521-396X
DOI:	10.1002/pssa.200303812