Photoconductivity of diamond-like carbon

Adelina Ilie, N Conway, B Kleinsorge, M Rattier, J Robertson, WI Milne

Research output: Contribution to journalArticle

Abstract

We have studied the photoconductivity in pure tetrahedral amorphous carbon (ta-C) and hydrogenated tetrahedral amorphous carbon (ta-C:H). Good photoconductive properties are demonstrated for ta-C:H, showing that the hydrogenated form of ta-C is of a higher electronic quality. Transport and recombination parameters are derived. Ta-C:H are low mobility solids with a jrr product of the order of 10-12 cm2 V"-and a recombination time Tr of about 10-7 s. At low energy excitation, the photoconductivity shows a sublinear dependence on the light intensity over a wide temperature range. The relationship between the photoconductivity and the density of spin defect centers is discussed. UV light is used to excite carriers into the extended states. Competitive recombination centers may be involved at high excitation energy.
Original languageEnglish
Pages (from-to)103 - 108
Number of pages6
JournalMRS Proceedings
Volume498
Publication statusPublished - 1998

Fingerprint Dive into the research topics of 'Photoconductivity of diamond-like carbon'. Together they form a unique fingerprint.

  • Cite this

    Ilie, A., Conway, N., Kleinsorge, B., Rattier, M., Robertson, J., & Milne, WI. (1998). Photoconductivity of diamond-like carbon. MRS Proceedings, 498, 103 - 108.