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Title: Abnormal variation of band gap in Zn doped Bi{sub 0.9}La{sub 0.1}FeO{sub 3} nanoparticles: Role of Fe-O-Fe bond angle and Fe-O bond anisotropy

Bi{sub 0.9}La{sub 0.1}FeO{sub 3} (BLFO) and Bi{sub 0.9}La{sub 0.1}Fe{sub 0.99}Zn{sub 0.01}O{sub 3} (BLFZO) nanoparticles were prepared via a sol-gel method. The oxygen vacancies and holes increase with Zn doping analyzed through X-ray photoelectron spectroscopy, which could contribute to the increase of leakage current density. However, with the increase of the defects (oxygen vacancies and holes), the band gap of BLFZO also is increased. To explain the abnormal phenomenon, the bandwidth of occupied and unoccupied bands was analyzed based on the structural symmetry driven by the Fe-O-Fe bond angle and Fe-O bond anisotropy.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [5]
  1. Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science, Tianjin University, Tianjin 300072 (China)
  2. College of Physics and Materials Science, Tianjin Normal University, Tianjin 300074 (China)
  3. Department of Physics, The University of Hong Kong, Pokfulam Road (Hong Kong)
  4. Department of Information Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, Guangxi (China)
  5. (Hong Kong)
Publication Date:
OSTI Identifier:
22486386
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; BOND ANGLE; CURRENT DENSITY; DOPED MATERIALS; HOLES; LEAKAGE CURRENT; NANOPARTICLES; OXYGEN; SOL-GEL PROCESS; SYMMETRY; VACANCIES; X-RAY PHOTOELECTRON SPECTROSCOPY