LUMINESCENCE AND OPTICAL-PROPERTIES OF SILOXENE

We review the optical and luminescence properties of siloxene (Si6O3H6 ). The preparation and basic structural properties of siloxene are des cribed, and theoretical results concerning optical transitions in diff erent modifications of siloxene are discussed. The dominant structural building blocks in as-prepared siloxene originate from isolated Si-6 rings which act as radiative recombination centers. The luminescence o f annealed siloxene and porous silicon are compared in detail. In part icular, new experimental results based on optically detected magnetic resonance provide microscopic information about radiative states in po rous Si which is incompatible with the conventional quantum confinemen t model.