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Effect of growth temperature on the structure and optical properties of ZnO nanorod arrays grown on ITO substrate
Author(s) -
Zhang Lingcui,
Ruan Yongfeng,
Liu Yali,
Zhai Ying
Publication year - 2013
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201300216
Subject(s) - nanorod , materials science , chemical bath deposition , scanning electron microscope , substrate (aquarium) , absorption edge , microstructure , absorption (acoustics) , nanocrystal , chemical engineering , deposition (geology) , morphology (biology) , nanotechnology , optoelectronics , band gap , composite material , genetics , sediment , geology , engineering , biology , paleontology , oceanography
ZnO nanorod arrays have been successfully prepared on ITO substrate by a chemical‐bath deposition method at different growth temperatures. The influence of the growth temperature on the morphology and microstructure of the ZnO nanorods was investigated by scanning electron microscopy (SEM) and X‐ray diffraction (XRD). The results showed that the diameter of the ZnO nanorods decreased and the size of the nanocrystals increased with increasing growth temperature. Optical absorption measurements showed the absorption band edge has shifted to a lower‐energy region due to the quantum size effect. Green emission and UV emission bands were observed and they are found to be temperature dependent, which indicates that the deep‐level emission and band‐edge emission of ZnO nanorods is closely related to the rod diameter, and the related mechanism is discussed.