The influence of nickel dopant on the microstructure and optical properties of SnO2 nano-powders
Liu Chun-Ming(刘春明)a), Fang Li-Mei(方丽梅)a), Zu Xiao-Tao(祖小涛)a)b)†, and Zhou Wei-Lie(周伟列)c)
a Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China; b International Center for Material Physics, Chinese Academy of Sciences, Shenyang 110015, China; c Advanced Materials Research Institute, University of New Orleans, New Orleans LA 70148, USA
Abstract The microstructure and optical properties of Ni-doped SnO2 nano-powders are studied in detail. By Ni-doping, not only the grain size reduces, but also the grain shape changes from nano-rods to spherical particles. The crystallization becomes better with annealing temperature increasing. The band gap energy decreases as nickel doping level increases. The sp--d hybridization and alloying effect due to amorphous SnO2-x phase should be responsible for the band gap narrowing effect. Nickel dopant does not change the photoluminescence (PL) peak positions.
Received: 22 February 2006
Revised: 21 July 2006
Accepted manuscript online:
PACS:
61.46.Df
(Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))
(Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)
Fund: Project
supported by the NSAF Joint Foundation of China (Grant No 10376006),
the Program for
New Century Excellent Talents in University of China
(Grant No NCET-04-0899), the Ph.D. Funding Support Program of Education
Ministry of China.
Cite this article:
Liu Chun-Ming(刘春明), Fang Li-Mei(方丽梅), Zu Xiao-Tao(祖小涛), and Zhou Wei-Lie(周伟列) The influence of nickel dopant on the microstructure and optical properties of SnO2 nano-powders 2007 Chinese Physics 16 95
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