Abstract
The states in the mobility gap of amorphous hydrogenated silicon play an important role in determining its optical and electrical properties, and it is essential to know their density and distribution in the gap. Space Charge Limited Current (SCLC) is a classic and a well-known method for determining this density of states [1ā4]. In SCLC measurements, the superlinear IāV dark characteristics due to injected charges from the ohmic contacts are measured. When the injection is large enough to displace significantly the quasi Fermi level from its equilibrium position, the current start to rise super-linearly. The magnitude of the current and the shape of the curve depend on the density of states just above the equilibrium Fermi level, so this portion of the curve can be used to determine this quantity.
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References
den Boer, W. (1981) Determination of midgap density of states in a-Si:H using SCLC measurements, J. Phys. (Paris), 42, C4ā451.
Nespurek, S. and Sworakowski, J. (1980) Use of SCLC measurements to determine the properties of enegetic distributions of bulk traps, J. Appl. Phys, 51, 2098.
Mackenzie, KD., Le Comber, P.G. and Spear, W.E. (1982) The density of states in amorphous silicon determined by SCLC measurements, Phil. Mag, 46, 377ā389.
Cech, V. (1997) Determination of the bulk density of states in a-Si:H by steady state SCLC, Solid State Electronics, 41, 81ā86.
Okat, T. (2001) Ms Thesis, Hacettepe University.
Smith, J.H. and Fonash, S.J. (1992) Assessments of density of states extraction from the SCLC measurements: a numerical simulation, J. Appl. Phys., 72, 5305ā5310.
Molenbroek, E.C., Van Der Werf, C.H.M., Feenstra, K.F., Rubinelli, F. and Schropp, E.I. (1997) SCLC in nin devices incorporating glow-discharge and hot-wire deposited a-Si:H, MRSSymp. Proc, 467, 717ā722.
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Ā© 2002 Springer Science+Business Media Dordrecht
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Eray, A., Nobile, G. (2002). Evaluation Of The Gap State Distribution In a-Si:H By SCLC Measurements. In: Marshall, J.M., Dimova-Malinovska, D. (eds) Photovoltaic and Photoactive Materials ā Properties, Technology and Applications. NATO Science Series, vol 80. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0632-3_14
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DOI: https://doi.org/10.1007/978-94-010-0632-3_14
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-0824-5
Online ISBN: 978-94-010-0632-3
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