The ultrafast dynamics for the formation/recombination of interlayer exciton and charge transfer in MoS2/WS2 heterostructures are studied by pump–probe measurements combined with density functional theory simulations. MoS2/WS2 heterostructure forms a type-II band alignment where the conduction band minimum is in MoS2 and the valance band maximum locates in the WS2 layer, respectively. By modulating the transient absorption configurations, a significant hole transferring process is observed from the MoS2 layer to the WS2 layer, instead of electrons moving oppositely, forming spatially interlayer excitons with longer lifetimes than that occurring in individual monolayers in hundreds of femtoseconds. This work gives a comprehensive understanding of ultrafast exciton dynamics of MoS2/WS2 and confirms its potential for realizable gate-controllable optoelectronics.

With the development of network and information technology, the system network equipment structure is more and more complex and the system is more and more difficult to manage. Facing such complex equipment and network architecture, current automation systems and network management methods are still in the initial stage, which can not meet the needs of safe operation and maintenance, it is difficult to improve service management level. In this paper, based on the research and analysis of unified information base model and interface specification, unified automation system of platform security area I and II, centralized monitoring and management of network equipment and security risk management, the author designs and implements the comprehensive operational supervisory system that adapts to intelligent power stations, which solved the operational problems in the system of secondary system security protection technology. Besides, the system was validated to be effective through the experiment.

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