The first-principles calculation is performed to investigate the energy band structures,density of states(DOS)and optical properties of SrBi_(2)A_(2)O_(9)(A=Nb,Ta),by using density functional theory(DFT)with the generalized gradient approximation(GGA).The results show that the band−gap of SrBi_(2)A_(2)O_(9) is smaller than that of SrBi_(2)A_(2)O_(9),and that there are strong hybridizations of A−O bands,which play very important roles in the electronic properties and optical responses of SrBi_(2)A_(2)O_(9).SrBi_(2)A_(2)O_(9) stimulates much higher photocatalytic activity than SrBi_(2)A_(2)O_(9),which is due to its suitable crystal structure.
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机译：利用扫描穿隧显微镜探讨在硒化铟上未氧化表面和氧化表面之介面接合处的电子特性 =Scanning Tunneling Microscope study of InSe Surface Electronic Properties at the Fresh/Oxided Interface Junction
