We present here the first measurement of photoacoustic spectra(PAS)of a-Si:H/a-SiNx:H multilayers.By converting the PAS signal to absorption coefficient,the blue shift and the broadening of Urbach edge are explained a...We present here the first measurement of photoacoustic spectra(PAS)of a-Si:H/a-SiNx:H multilayers.By converting the PAS signal to absorption coefficient,the blue shift and the broadening of Urbach edge are explained as the results of quantum size effect in superlattice structure.展开更多
Light-induced dark-and photoconductivity changes(so-caiied SWE)have been investigated on GD undoped microcrystaVLine Si:H(Ua-Si:H).The SWE deareas’es and reaches vanishir.O as the grain size increases.An interpretati...Light-induced dark-and photoconductivity changes(so-caiied SWE)have been investigated on GD undoped microcrystaVLine Si:H(Ua-Si:H).The SWE deareas’es and reaches vanishir.O as the grain size increases.An interpretation for the tuio-phase structure and the contribution of grain boundary defeats is given.展开更多
By using strong hydrogen dilution of silane in PECVD system and controlling the deposition parameters strictly, we have prepared a-Si:H and nc-Si:H as well as μc-Si:H films respectively. The structural characters of ...By using strong hydrogen dilution of silane in PECVD system and controlling the deposition parameters strictly, we have prepared a-Si:H and nc-Si:H as well as μc-Si:H films respectively. The structural characters of nc-Si: H films detected by means of HREM, Raman and X-ray diffraction spectra are identified as coinciding with the known definition of nanometer solids. The unique electrical and optical properties of nc-Si:H films are considered as the consequence of its novel structures.展开更多
基金funds of Ph.D thesis from the Chinese Ministry of Education.
文摘We present here the first measurement of photoacoustic spectra(PAS)of a-Si:H/a-SiNx:H multilayers.By converting the PAS signal to absorption coefficient,the blue shift and the broadening of Urbach edge are explained as the results of quantum size effect in superlattice structure.
基金supported by the Science Fund of the Chinese Academy of Sciences.
文摘Light-induced dark-and photoconductivity changes(so-caiied SWE)have been investigated on GD undoped microcrystaVLine Si:H(Ua-Si:H).The SWE deareas’es and reaches vanishir.O as the grain size increases.An interpretation for the tuio-phase structure and the contribution of grain boundary defeats is given.
基金the National Natural Science Foundation of China
文摘By using strong hydrogen dilution of silane in PECVD system and controlling the deposition parameters strictly, we have prepared a-Si:H and nc-Si:H as well as μc-Si:H films respectively. The structural characters of nc-Si: H films detected by means of HREM, Raman and X-ray diffraction spectra are identified as coinciding with the known definition of nanometer solids. The unique electrical and optical properties of nc-Si:H films are considered as the consequence of its novel structures.
