Surface electronic properties of ZnO nanoparticles | Zendy

Cuong TonThat | Zendy; Matthew R. Phillips | Zendy; Matthew Foley | Zendy; Steve J. Moody | Zendy; A. P. J. Stampfl | Zendy

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Surface electronic properties of ZnO nanoparticles

Author(s) -

Cuong TonThat,

Matthew R. Phillips,

Matthew Foley,

Steve J. Moody,

A. P. J. Stampfl

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2952955

Subject(s) - cathodoluminescence , nanoparticle , luminescence , materials science , vacancy defect , oxygen , zinc , phosphor , absorption (acoustics) , electronic structure , wide bandgap semiconductor , surface states , nanotechnology , chemical engineering , chemical physics , optoelectronics , surface (topology) , chemistry , crystallography , metallurgy , computational chemistry , composite material , geometry , engineering , organic chemistry , mathematics

The surface electronic structure of ZnO nanoparticles has been studied with photoemission and x-ray absorption spectroscopies. Contrary to expectation, ZnO:Zn phosphor nanoparticles were found to contain a lower oxygen vacancy density on the surface than undoped ZnO counterparts, but oxygen vacancies are in different chemical environments. Cathodoluminescence shows intense green luminescence from the ZnO:Zn surface, while the undoped nanoparticles exhibit only the near-band-edge emission. The results indicate the roles of surface oxygen vacancies and their environment in the previously unexplained green luminescence from the ZnO:Zn material. © 2008, American Institute of Physic

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