The zinc sulfide electroluminescence(EL) thin film doped with erbium,fabricated by thermal evaporation with two boats,are made and analyzed by the technology of X-ray photoelectron spectroscopy.The information of surf...The zinc sulfide electroluminescence(EL) thin film doped with erbium,fabricated by thermal evaporation with two boats,are made and analyzed by the technology of X-ray photoelectron spectroscopy.The information of surface states of the microcrystalline thin films is obtained.The transient EL spectroscopy of the thin film devices is measured and simulated by the formulae of different energy transfer mechanism.The results indicate that the formula of Gaussian line shape can fit well for description of transient EL process of zinc sulfide thin film doped with erbium.It shows that the surface states have important effect on the relaxation peaks during the decay process of EL for the thin film devices.展开更多
In this paper, we use the car-following model with the anticipation effect of the potential lane-changing probability （Acta Mech. Sin. 24 （2008） 399） to investigate the effects of the potential lane-changing proba...In this paper, we use the car-following model with the anticipation effect of the potential lane-changing probability （Acta Mech. Sin. 24 （2008） 399） to investigate the effects of the potential lane-changing probability on uniform flow. The analytical and numerical results show that the potential lane-changing probability can enhance the speed and flow of uniform flow and that their increments are related to the density.展开更多
文摘The zinc sulfide electroluminescence(EL) thin film doped with erbium,fabricated by thermal evaporation with two boats,are made and analyzed by the technology of X-ray photoelectron spectroscopy.The information of surface states of the microcrystalline thin films is obtained.The transient EL spectroscopy of the thin film devices is measured and simulated by the formulae of different energy transfer mechanism.The results indicate that the formula of Gaussian line shape can fit well for description of transient EL process of zinc sulfide thin film doped with erbium.It shows that the surface states have important effect on the relaxation peaks during the decay process of EL for the thin film devices.
基金Supported by the Program for New Century Excellent Talents in University under Grant No.NCET-08-0038the National Natural Science Foundation of China under Grant Nos.70701002,70971007,and 70521001 the National Basic Research Program of China under Grant No.2006CB705503
文摘In this paper, we use the car-following model with the anticipation effect of the potential lane-changing probability （Acta Mech. Sin. 24 （2008） 399） to investigate the effects of the potential lane-changing probability on uniform flow. The analytical and numerical results show that the potential lane-changing probability can enhance the speed and flow of uniform flow and that their increments are related to the density.
