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Photoconductivity of Diamond-Like Carbon

  • A. Hie (a1), N. Conway (a1), B. Kleinsorge (a1), M. Rattier (a1), J. Robertson (a1) and W. I. Milne (a1)...


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 μτ product of the order of 10−12 cm2 V−1 and a recombination time τr 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.



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1. Crandall, R. in Semiconductors and Semimetals, vol. 21, part B, edited by Pankove, J.I, Academic Press, 1984, p. 245283.
2. McKenzie, D.R., Yin, Y., Marks, N.A., Davis, C., Pailthorpe, B.A., Diamond Relat. Mater. 3, 353 (1994).
3. Amaratunga, G.A.J., Veerasamy, V.S., Milne, W.I., Davis, C.A., Silva, S.R.P. and MacKenzie, H.S., Appl. Phys. Lett. 63, p. 370 (1993).
4. Nitta, S., Takada, N., Sugiyama, K., Itoh, T., Nonomura, S., ICAMS-17 Proceedings, to be published.
5. Weiler, M., Sattel, S., Giessen, T., Jung, K., Ehrhardt, H., Veerasamy, V.S. and Robertson, J., Phys. Rev. B53, p.1594(1996).
6. Falion, P.J., Veerasamy, V.S., Davis, C.A., Robertson, J., Amaratunga, G.A.J., Milne, W.I. and Koskinen, J., Phys. Rev. B 48, p. 4777 (1993).
7. Chhowalla, M., Robertson, J., Chen, C.W., Silva, S.R.P., Davis, C.A., Amaratunga, G.A.J. and Milne, W.I., J. Appl. Phys. 81, p. 139 (1997).
8. Conway, N.M.J., Milne, W.I. and Robertson, J., Diamond. Relat. Mater. (1997), to be published.
9. Street, R.A., Hydrogenated amorphous silicon, Cambridge University Press, 1991, p. 262266.
10. Robertson, J., Phil. Mag. B 76, p. 335 (1997).
11. Clough, F.J., Milne, W.I., Kleinsorge, B., Robertson, J., Amaratunga, G.A.J. and Roy, B.N., Electronics Lett. 32, p. 498 (1996).
12. Dersch, H., Schweitzer, L. and Stake, J., Phys. Rev. B 28, p. 4678 (1983).
13. Fritzsche, H., Yoon, B.-G., Chi, D.-Z. and Tran, M.Q., J. Non-Cryst. Solids 141, p. 123 (1992).
14. Schütte, S., Will, S., Mell, H. and Fuhs, W., Diamond Relat. Mater. 2, p. 1360 (1993).

Photoconductivity of Diamond-Like Carbon

  • A. Hie (a1), N. Conway (a1), B. Kleinsorge (a1), M. Rattier (a1), J. Robertson (a1) and W. I. Milne (a1)...


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