Light-induced creation of hydrogen-pairs in a-Si:H

The light-induced creation of hydrogen-pairs in a-Si:H is investigated, using a previous model of the light-induced creation of dangling bonds in a-Si:H. The formation of hydrogen-pairs is reasonably accounted for in comparison with the observation of the doublet in nuclear magnetic resonance spectra in a-Si:H by Su et al. The spin-lattice relaxation time of hydrogen-pairs observed above 7 K by Su et al. is discussed in terms of the presence of a normal dangling bond located near a hydrogen-pair.