| Numéro |
J. Phys. Colloques
Volume 42, Numéro C4, Octobre 1981
Proceedings of the Ninth International Conference on Amorphous and Liquid Semiconductors
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|---|---|---|
| Page(s) | C4-305 - C4-308 | |
| DOI | https://doi.org/10.1051/jphyscol:1981464 | |
Proceedings of the Ninth International Conference on Amorphous and Liquid Semiconductors
J. Phys. Colloques 42 (1981) C4-305-C4-308
DOI: 10.1051/jphyscol:1981464
LETI, CEN. G, CEA, 85X, 38041 Grenoble Cedex, France
J. Phys. Colloques 42 (1981) C4-305-C4-308
DOI: 10.1051/jphyscol:1981464
ENHANCEMENT OF THE PHOTOCURRENT SIGNAL IN a-Si:H BY MEAN OF A WAVEGUIDING TECHNIQUE, APPLICATION TO THE OPTICAL ABSORPTION SPECTROSCOPY BELOW THE BAND GAP
M. Olivier and P. BouchutLETI, CEN. G, CEA, 85X, 38041 Grenoble Cedex, France
Abstract
A waveguiding technique intended for photoconductivity measurements in thin films is described. This new method which offers at least one order of magnitude enhancement over conventional photoconductivity technique is used to determine the optical absorption of a a-Si:H film at photon energies down to 0.65 eV. These results, combined with optical and conventional photoconductivity measurements, allow to draw the optical absorption spectrum of the sample between 0.65 and 2.2 eV.