Evolution with light-soaking of polymorphous material prepared at 423 K

We have studied the density of states and the structural properties of a new class of material. called hydrogenated polymorphous silicon, prepared by decomposition of a mixture of silane and hydrogen in a radio frequency powered plasma enhanced chemical vapour deposition system. The evolution of the density of states and of the optoelectronic properties of these films upon light-soaking and annealing cycles is different from that observed on standard hydrogenated amorphous silicon. The presence of platelet-like microstructures. revealed by an infrared absorption band centred at 2030 cm(-1). may explain this evolution, (C) 2002 Elsevier Science B.V. All rights reserved.


Published in:
Journal of Non-Crystalline Solids, 299, 482-486
Year:
2002
ISSN:
0022-3093
Keywords:
Laboratories:




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