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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis


Difference in electronic structure between tetragonal and cubic SrNbO2N

DC Field Value Language Borse, Pramod H. ko Kim, Hyun G. ko Lee, Jae Sung ko 2015-07-30T06:31:19Z - 2015-07-30 ko 2005-08 -
dc.identifier.citation JOURNAL OF APPLIED PHYSICS, v.98, no.4, pp.043706 - ko
dc.identifier.issn 0021-8979 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract We report here a comparative study of the electronic structure of earlier known cubic phase and the recently, reported correct tetragonal phase of SrNbO2N. We performed the calculations within the framework of density-functional theory (DFT) by using the WIEN97 code. The valence band consists of N 2p while the conduction band consists of Nb 4d in cubic system; on the contrary, these Nb 4d states show a strong interaction with anion p states in tetragonal system and indicate theoretically, a metallic behavior. The direct forbidden gap of tetragonal system was 0 eV, whereas for cubic system was 0.2 eV; the relative difference in the band gap of two systems is possibly attributed to the high covalency and is possibly acquired due to the presence of the shorter bond length of Nb - N than that of Nb-O in the tetragonal system. The results of electronic structures have been discussed in the light of optical applications of this oxynitride in solar energy conversion. The calculated optical-absorption coefficient I(w) from real and imaginary parts of dielectric function, further clarifies the suitability of the application. (c) 2005 American Institute of Physics ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher AMER INST PHYSICS ko
dc.subject VISIBLE-LIGHT ko
dc.subject METALS ko
dc.subject NB ko
dc.subject TA ko
dc.title Difference in electronic structure between tetragonal and cubic SrNbO2N ko
dc.title.alternative Difference in electronic structure between tetragonal and cubic SrNbO2N ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-25144455431 ko
dc.identifier.wosid 000231551700058 ko
dc.type.rims ART ko
dc.description.wostc 5 *
dc.description.scopustc 5 * 2015-12-28 * 2015-11-04 *
dc.identifier.doi 10.1063/1.2032612 ko
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