Realization of intrinsic p-type ZnO thin films by metal organic chemical vapor deposition

Tan, Swee Tiam; Chen, B. J.; Sun, Xiao Wei; Yu, Ming; Zhang, X. H.; Chua, Soo-Jin

doi:10.1007/s11664-005-0247-6

Cited by 26 publications

(14 citation statements)

References 25 publications

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“…This result successfully demonstrated that nitrogen can be incorporated into the ZnO thin film lattice by using a combination of zinc acetate and ammonium acetate precursors. The tendency of decreasing grain size and crystallinity with the incorporation of nitrogen in ZnO lattice is similar to that in some previously reported works [26,37,38].…”

Section: Thin Films and Characterizationsupporting

confidence: 90%

Tribological behavior of N-doped ZnO thin films by metal organic chemical vapor deposition under lubricated contacts

et al. 2017

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N-doped ZnO thin films were deposited on 304L stainless steel through the pyrolysis of zinc acetate and ammonium acetate in different ratios at a temperature of 420 °C using metal organic chemical vapor deposition. Compositional and structural analyzes of the films were performed by using Rutherford backscattering spectroscopy and X-ray diffraction. The frictional behavior of the thin films and 304L stainless steel substrate was evaluated using a ball-on-flat configuration with reciprocating sliding under marginally lubricated and fully flooded conditions. Al alloy (2017) was used as ball counterface, while basestock synthetic polyalfaolefin oil (PAO10) without additives was used as lubricant. The flat and ball counterface surfaces were examined to assess the wear dimension and failure mechanism. Under marginally lubricated condition, N-doped ZnO thin films provided significant reduction in friction, whereas the films have minimal or no effect in friction under fully flooded condition. N-doped ZnO thin films showed a significant effect in protecting the ball counterface as wear volume was reduced compared with that of the substrate under the marginally lubricated condition. Under the fully flooded condition, with the exception of one of the films, the wear volume of the N-doped ZnO thin films ball reduced compared with that of the substrate. In all the ball counterfaces for N-doped ZnO thin films under both conditions, wear occurred through abrasive mechanism of various degrees or mild polishing. Thus, superfluous lubrication of N-doped ZnO thin films is not necessary to reduce friction and wear.

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Section: Thin Films and Characterizationsupporting

confidence: 90%

Tribological behavior of N-doped ZnO thin films by metal organic chemical vapor deposition under lubricated contacts

et al. 2017

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“…As noted above, we collected a large number of published Tauc analyses of undoped ZnO that included plots of the absorbance data against the photon energy . This was critical, as our assessment of the application of the Tauc method required the consistent application of a fitting method, as described below.…”

Section: Modelmentioning

confidence: 99%

Evaluation of the Tauc method for optical absorption edge determination: ZnO thin films as a model system

Viezbicke

Patel

Davis

et al. 2015

Phys. Status Solidi B

888

419

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One of the most frequently used methods for characterizing thin films is UV–Vis absorption. The near‐edge region can be fitted to a simple expression in which the intercept gives the band‐gap and the fitting exponent identifies the electronic transition as direct or indirect (see Tauc et al., Phys. Status Solidi 15, 627 (1966); these are often called “Tauc” plots). While the technique is powerful and simple, the accuracy of the fitted band‐gap result is seldom stated or known. We tackle this question by refitting a large number of Tauc plots from the literature and look for trends. Nominally pure zinc oxide (ZnO) was chosen as a material with limited intrinsic deviation from stoichiometry and which has been widely studied. Our examination of the band gap values and their distribution leads to a discussion of some experimental factors that can bias the data and lead to either smaller or larger apparent values than would be expected. Finally, an easily evaluated figure‐of‐merit is defined that may help guide more accurate Tauc fitting. For samples with relatively sharper Tauc plot shapes, the population yields Eg(ZnO) as 3.276 ± 0.033 eV, in good agreement with data for single crystalline material.

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“…The DLE for highly c-axis oriented ZnO film peaking at 2.5 eV while the QDs embedded film has a DLE centered at 2.26 eV. It is generally well accepted that the DLE at around visible spectrum is attributed to the recombination of a photogenerated hole with an electron in singly ionized oxygen vacancy in ZnO films [10,19,20]. The ratio of NBE to DLE is generally used to evaluate the concentration of structural defects in ZnO films.…”

Section: Article In Pressmentioning

confidence: 99%

Zinc oxide quantum dots embedded films by metal organic chemical vapor deposition

Tan

Sun

Zhang

et al. 2006

Journal of Crystal Growth

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Realization of intrinsic p-type ZnO thin films by metal organic chemical vapor deposition

Cited by 26 publications

References 25 publications

Tribological behavior of N-doped ZnO thin films by metal organic chemical vapor deposition under lubricated contacts

Tribological behavior of N-doped ZnO thin films by metal organic chemical vapor deposition under lubricated contacts

Evaluation of the Tauc method for optical absorption edge determination: ZnO thin films as a model system

Zinc oxide quantum dots embedded films by metal organic chemical vapor deposition

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