Hostname: page-component-848d4c4894-pftt2 Total loading time: 0 Render date: 2024-05-24T10:48:47.540Z Has data issue: false hasContentIssue false

Interface Study Of Nanocrystalline Silicon and Crystalline Silicon Using Microwave Photoconductivity Decay

Published online by Cambridge University Press:  01 February 2011

Mahdi Farrokh Baroughi
Affiliation:, Universty of Waterloo, Electrical and Computer Engineering, 200 University Ave. W., Waterloo, Ontario, N2M5E6, Canada, 15198884567 x.3804
Siva Sivoththaman
Affiliation:, Universty of Waterloo, Electrical and Computer Engineering, 200 University Ave. W., Waterloo, Ontario, N2L 3G1, Canada
Get access


This paper presents a measurement technique for studying of the interface between a nanocrystalline silicon (nc-Si) film and a crystalline silicon (c-Si) substrate using microwave photoconductivity decay (MWPCD). The nc-Si films were deposited using plasma enhanced chemical vapor deposition of highly hydrogen-diluted silane. The films were deposited on both sides of the high purity float-zone (FZ) Si wafers. The high resolution transmission electron microscope (HRTEM) analysis of the interface and the characterization of the effective excess carrier lifetime of the samples using MWPCD revealed the following results: (i) The crystallinity of the deposited nc-Si films is very high. The nc-Si film follows the crystal orientation of the substrate such that not a well-defined boundary between nc-Si film and the c-Si substrate is observed. (ii) A surface recombination velocity of less than 10 cm/s was measured for the interface region of the nc-Si/c-Si junctions. (iii) A small discontinuity in the band-energy diagram of the interface region was observed.

Research Article
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)


1. Yablonovitch, E., Allara, D., Chang, C., Gmitter, T and Bright, T., Phys. Rev. Lett. 57, 249 (1986).Google Scholar
2. Schroder, D., IEEE Trans. on Electr. Dev., 44, 160 (1997).Google Scholar
3. Yamamoto, H., Takaba, Y., Komatsu, Y., Yang, M., Hayakawa, T., Shimizu, M. and Takiguchi, H., Solar Energy Materials & Solar Cells, 74, 525 (2002).Google Scholar
4. Pla, J., Centurioni, E., Summonte, C., Rizzoli, R., Migliori, A., Desalvo, A. and Zignani, F., Thin Solid Films, 405, 248 (2002).Google Scholar
5. Baroughi, M. Farrokh, Lee, C. and Sivoththaman, S., J. of Vacuum Science and Technology, 24, 821826 (2006)Google Scholar
6. Dauwe, S., Schmidt, J. and Hezel, R., Proceedings of the 29th IEEE PVSC, 1246 (2002).Google Scholar