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Electronic Properties of Porous Silicon

  • M. R. Beltran (a1), J. Tagüeña-Martinez (a1), M. Cruz (a1) and C. Wang (a1)


Porous silicon (PS) has been extensively studied in recent years. The origin of its luminescence has been a subject of debate. This work attempts to give some insight towards the understanding of this phenomenon, studying the behaviour of the energy band structure of PS as a function of the pore morphology and distribution, for a given porosity. The porous structure is modeled as empty columns of different sizes and shapes, produced into san otherwise silicon perfect crystal. The columns are passivated with hydrogen atoms. A tight-binding Hamiltonian on an ; sp3:s* basis set is applied onto a supercell. Due to the simplicity of the model, morphology effects can be analyzed. The results show that the band :gap and the nature of the 'States at the top of the valence band depend on the morphology. Furthermore, we also discuss the shift of the conduction band minimum towards the gamma point, producing an almost direct band gap, as the pore distribution changes.



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1 Canham, L. T., Appl. Phys. Lett. 57, 1046(1990). A. G. Cullis, and L. T. Canham, Nature 353, 335 (1991).
2 Brandt, M. S., Fuchs, H. D., Stutzmann, M., Weber, J., and Cardona, M., Sol. State Comm. 81, 307 (1992).
3 Qin, G. G. and Jia, Y. Q., Sol. State Comm. 86, 559 (1993).
4 Vial, J. C., Bsiesy, A., Gaspard, F., Hérino, R., Ligeon, M., Muller, F., Romestain, R., and Macfarlane, R. M., Phys. Rev. B 45, 14171 (1992).
5 Van de Walle, C. G. and Northrup, J. E., Phys. Rev. Lett. 70, 1116 (1993).
6 Chuang, S. F., Collins, S. D., and Smith, R. L., Appl. Phys. Lett. 55, 1540 (1989).
7 Schuppler, S., Friedman, S. L., Marcus, M. A., Adler, D. L., Xie, Y. H., Ross, F. M., Harris, T. D. Brown, W. L., Chabal, Y. J., Brus, L. E., and Citrin, P. H., Phys. Rev. Lett. 72, 2648 (1994).
8 Teschke, O., Alvarez, F., Tessler, L., and Kleinke, U., Appl. Phys. Lett. 63 1927 (1993).
9 Teschke, O., Goncalves, M. C., and Galembeck, F., Appl. Phys. Lett. 63, 1348 (1993).
10 Bellet, D., Dolino, G., Ligeon, M., Blanc, P., and Kirsch, M., J. Appl. Phys. 71, 145 (1992).
11 Delerue, C., Allan, G., and Lannoo, M., Phys. Rev. B 48, 11024 (1993).
12 Buda, F., Kohanoff, J., and Parrinello, M., Phys. Rev. Lett. 69, 1272 (1992).
13 Read, A. J., Needs, R. J., Nash, K. J., Canham, L. T., Calcott, P. D. J., and Qteish, A., Phys. Rev. Lett. 69, 1232 (1992).
14 Delley, B. and Steigmeier, E. F., Phys. Rev. B 47, 1397 (1993).
15 Men, Yan Shen and Shu-Lin, Zhang, Phys. Lett. A 176, 254 (1993).
16 Sanders, G. D. and Yia-Chung, Chang, Phys. Rev. B 45, 9202, (1992). G.D. Sanders, C. J. Stanton and Y. C. Chang, Phys. Rev. B 48, 11067 (1993).
17 Jian-Bai, Xia and Yia-Chung, Chang, Phys. Rev. B 48, 5179 (1993).
18 Proot, J. P., Delerue, C., and Allan, G., Appl. Phys. Lett. 61, 1948 (1992).
19 Bsiesy, A., Vial, J. C., Gaspard, F., Herino, R., Ligeon, M., Muller, F., Romestein, R., Wasiela, A., Halimaoui, A., and Bomchil, G., Surf. Sci. 254, 195 (1991).
20 Vogl, P., Hjalmarson, H. P., and Dow, J. D., J. Phys. Chem. Solids 44, 365 (1983).

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Electronic Properties of Porous Silicon

  • M. R. Beltran (a1), J. Tagüeña-Martinez (a1), M. Cruz (a1) and C. Wang (a1)


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