PHOTOCREATED METASTABLE STATE IN ORGANOPOLYSILANES

A photocreated metastable state in organopolysilanes has been studied using the electron spin resonance technique. Depending on the excitati on photon energy, two different kinds of signals have been observed fo r the first time. The origin of the signals are discussed, in comparis on with a first principles calculation. As a result, the self-trapping of an electron and the sodium related defect creation are suggested i n organopolysilane depending on the excitation energy. These results a re compared with the Staebler-Wronski effect in a-Si:H.