Photoluminescence and field-emission properties of Cu-doped SnO2 nanobelts |
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Authors: | L J Li K Yu H B Mao Z Q Zhu |
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Institution: | 1. Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University, Shanghai, 200241, People’s Republic of China
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Abstract: | By using a thermal evaporation and condensation method, Cu-doped SnO2 nanobelts were synthesized on silicon substrate. High-resolution transmission electron microscopy and energy dispersive X-ray
spectroscopy studies of Cu-doped SnO2 nanobelts demonstrate that the nanobelts are single-crystal structures and Cu is homogeneously doped into the SnO2 lattice. X-ray diffraction further confirmed the single-phase nature of these nanobelts. The photoluminescence measurements
of the nanobelts and samples annealed in oxygen were measured from 77 K to 300 K. Field-emission measurements demonstrated
that the Cu-doped nanobelts possessed good performance with a turn-on field of ∼2.9 V/μm and a threshold field of ∼4.8 V/μm. |
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