Hydrogenated nano-crystalline silicon (nc-Si:H) is a promising material for multi-junction solar cells. We investigated the local hydrogen environments in nano-crystalline silicon thin films by nuclear-magnetic-resonance (NMR). At room temperature, 1H NMR spectra have broader components than those observed in standard device grade hydrogenated amorphous silicon (a-Si:H). As the temperature decreases, the 1H NMR exhibits a broadening of the line shape attributed to hydrogen atoms at the interfaces between the amorphous silicon (a-Si) and the crystalline silicon (c-Si) regions. These results suggest that the local hydrogen structure in nc-Si:H is very different from that in a-Si:H. In particular, the hydrogen clusters contributing to broadened spectra may exist on the surfaces of the a-Si/c-Si interfaces which do not exist in the more dense matrix of a-Si:H and may contribute to certain unique optoelectronic properties of these nc-Si:H thin films. The dependence of the spin-lattice relaxation time (T1) on temperature, however, is very similar to that in a-Si:H, which indicates the spin-lattice relaxation mechanism, i.e via spin diffusion through molecular hydrogen, is common to both systems.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
T. Su, T. Ju, B. Yan, J. Yang, S. Guha, and P. C. Taylor. Mater. Res. Soc. Symp. Proc. 1066, 273 (2008)
E. Fukushima and S. Roeder, Experimental Pulse NMR, A Nuts and Bolts Approach, (Addison Publishing Company, Inc., Reading, MA, 1982), pp252.
W.E. Carlos and P.C. Taylor, Phys. Rev. B, 26, 3605 (1982)
C. P. Slichter, Principles of Magnetic Resonance, (Springer-Verlag, New York), pp8.
W.E. Carlos and P.C. Taylor, Phys. Rev. B, 24, 1435 (1982)
M.S. Conradi and R.E. Norberg, Phys. Rev. B, 24, 2285 (1982)
About this article
Cite this article
Kiriluk, K.G., Bobela, D.C., Su, T. et al. H NMR Study of Hydrogenated Nanocrystalline Silicon Thin Films. MRS Online Proceedings Library 1153, 2304 (2008). https://doi.org/10.1557/PROC-1153-A23-04