硅納米線電輸運(yùn)性質(zhì)系統(tǒng)研究及其在太陽(yáng)電池上的應(yīng)用.pdf

1、Nonlinear light absorption (NLA) of hydrogenated nanocrystalline silicon (nc-Si:H) has beeninvestigated through the open aperture Z-scan method for the incident photon energy slightlyless than the bandgap of the sample.N

2、LA responses have been observed to be highlysensitive to the wavelength and intensity of the incident light as well as to the bandgap of thesample, indicating highly tunable NLA ofnc-Si:H.The band tail of nc-Si:H appears

3、 to play acrucial role in such NLA responses.In addition, the light absorption coefficient of nc-Si:Hwas further engineered to have the Gaussian distribution via the absorption modificationusing a femtosecond laser.The a

4、bsorption-modified sample exhibits a significant absorptionenhancement up to ～ 700 ％, and its strong absorption doesn't depend on the incident light.We propose a model responsible for these interesting absorption behavio