Bin Yu's research while affiliated with Yangzhou University and other places
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Publications (4)
The Zn1-xCuxO (x = 0.0-3.5%) nanocrystals have been synthesized by a simple sol-gel method. X-ray diffraction, optical absorption and photoluminescence measurements were employed to validate consistently the incorporation of Cu ions into the ZnO wurtzite lattice without formation of secondary phases for Zn1-xCuxO (x < 2.0%). Meanwhile, it was found...
MgO coating ZnO microrods were synthesized by hydrothermal growth method in a two-stage process. The excitation-dependent photoluminescence of uncoated and MgO-coated ZnO microrods was investigated. We found that the MgO coating passivates defect-states on the surface to reduce largely the green emission, thus the ultraviolet emission efficiency is...
ZnO quantum dots (QDs) with uniform shape and different sizes were synthesized by a simple sol-gel method. The visible emission of the ZnO QDs displays highly both excitation-dependent and size-dependent behaviors. The results indicate that the green emission should be attributed to the transition of electrons from the conduction band to a certain...
Citations
... Finally, the obtained solids were ground into powder and calcined at 500°C (a heating rate of 10°C min -1 ) for 180 min under N 2 gas in a tubular pyrolysis furnace (Fig. 1). According to the literature, the solubility of Cu in ZnO is 2%, beyond which the excess Cu segregates as a secondary phase, forming a monoclinic CuO (Fig. S1) [19]. This means that at a certain optimal doping level, most copper ions enter the lattice in the form of substituted ions instead of interstitials [20]. ...
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... Further, the band edge of the ZnO/MoS 2 heterostructures is blueshifted to higher energy (shorter wavelength) side. The peak at 370 nm is attributed to the near-band-edge (NBE) emission of ZnO, and the peak at 365 nm is related to the ZnO phase in the ZnO/MoS 2 heterostructures [27]. The slight difference between the NBE emission of the ZnO phase in the ZnO/MoS 2 heterostructures and the ZnO nanowires may be caused by the strained lattice generated due to the difference in the primitive cell of ZnO and MoS 2 [11]. ...
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... [13][14][15] Therefore, research has mainly focused on the TM-doped SnO 2 in the past decades. [16][17][18] Unexpectedly, the improvement of the electrochemical properties of SnO 2 by single-element doping is insignificant. Theoretical 19 and experimental 20 studies demonstrated that doping with double or even multiple impurities can improve the structural, ferromagnetic, and optical properties of SnO 2 . ...
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... The red shift is due to the interaction of the acceptors and adsorbed oxygen atoms or from the effect of tensile strain on valance band maximum. 36 The red shift of UV peak shows the presence of small residual compressive strain at the time of deposition of nanorods and the strain was partially relaxed during the post growth treatment, which might modify the band-gap of ZnO nanorods. 37 The FWHM and the shift of the UV peak are similar to what has been observed for annealing in Zn environment (Fig. 5(c)). ...
