Atomic structural variations of [0001]-tilt grain boundaries during ZnO grain growth occurred by thermal treatments

Yuk, Jong Min; Lee, JeongYong; Lee, Zong-Hoon; No, Young Soo; Kim, T. W.; Kim, J. Y.; Choi, Won‐Kook

doi:10.1016/j.apsusc.2010.12.083

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…For latter, they use a zig-zag 5/7-channel grain boundary model, which usually has higher grain boundary energy than straight line model. 34 Sites 2 and 4 are also the most stable position for V Zn and V O , the relaxed atomic structure of V Zn is shown in Fig. 1(b).…”

Section: Resultsmentioning

confidence: 97%

O-O bonding stabilized zinc vacancy as origin of p-type doping on Σ7 ZnO grain boundary

Xia

Guo

et al. 2015

Journal of Applied Physics

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Using density functional theory calculations, we investigate different defects on ZnO R7 ð12 30Þ grain boundary. We find that on this low energy grain boundary, the formation energy of V Zn and O i are drastically reduced by the formation of O-O bonds and V Zn has lower formation energy than O i . Interaction of defects on grain boundary can form new defect bands, and the calculated impurity band maximum is only 0.1 eV below V Zn unoccupied levels. Therefore, we believe that the p-type layers observed in experiments near the ZnO grain boundaries can be attributed to V Zn . V C 2015 AIP Publishing LLC. [http://dx.

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Section: Resultsmentioning

confidence: 97%

O-O bonding stabilized zinc vacancy as origin of p-type doping on Σ7 ZnO grain boundary

Xia

Guo

et al. 2015

Journal of Applied Physics

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“…It is found that the average grain size of ceramics having single CaMoO 4 phase decreases with the increase of x . During the formation of solid solution, Eu 3+ enters the Ca site, and the changes of covalence and atomic expansion increase the structural stress of grains and thus hinder the growth of grains 21,22 . As the content of EuNbO 4 gradually increases, this process is intensified, so the grain size gradually decreases.…”

Section: Resultsmentioning

confidence: 99%

“…During the formation of solid solution, Eu 3+ enters the Ca site, and the changes of covalence and atomic expansion increase the structural stress of grains and thus hinder the growth of grains. 21,22 As the content of EuNbO 4 gradually increases, this process is intensified, so the grain size gradually decreases. Besides, the average grain size of the ceramic sample with x = 0.7 is smaller than the other samples.…”

Section: Resultsmentioning

confidence: 99%

Structure modulation for synergistically optimizing photoluminescence and conductive property in EuNbO₄–CaMoO₄ ceramics

Sun

et al. 2022

J Am Ceram Soc.

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As new multifunctional semiconductor materials, solid‐solution ceramics demonstrate great potential in the field of electronic and optoelectronic devices. CaEuNbMoO8 ceramic is the solid solution of EuNbO4 and CaMoO4, but how to synergistically regulate its transmission of electricity and light still remains challenging. Herein, the structure modulations by adjusting the ratio of EuNbO4 and CaMoO4 and the changes in electrical transport and photoluminescence (PL) properties have been investigated. Meanwhile, the asymmetric ratio (5D0–7F2/5D0–7F1) further determines the symmetry variation of the local microstructure with the solid‐solution ratio of EuNbO4. The correspondence between the structure and phase transition of EuNbO4 ceramics at high temperature is investigated, and it is found that the point symmetry changes from C2h to C4h, and the activation energy changes significantly with increasing temperature. This work provides a solution for the synergistic optimization of PL and conductivity of solid‐solution ceramics by modulating the symmetry of the crystal structure.

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High‐Resolution Observation of Nucleation and Growth Behavior of Nanomaterials Using a Graphene Template

Yoo

Park

et al. 2014

Advanced Materials

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By using graphene as an electron beam-transparent substrate for both nanomaterial growth and transmission electron microscopy (TEM) measurements, we investigate initial growth behavior of nanomaterials. The direct growth and imaging method using graphene facilitate atomic-resolution imaging of nanomaterials at the very early stage of growth. This enables the observation of the transition in crystal structure of ZnO nuclei and the formation of various defects during nanomaterial growth.

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Atomic structural variations of [0001]-tilt grain boundaries during ZnO grain growth occurred by thermal treatments

Cited by 5 publications

References 24 publications

O-O bonding stabilized zinc vacancy as origin of p-type doping on Σ7 ZnO grain boundary

O-O bonding stabilized zinc vacancy as origin of p-type doping on Σ7 ZnO grain boundary

Structure modulation for synergistically optimizing photoluminescence and conductive property in EuNbO₄–CaMoO₄ ceramics

High‐Resolution Observation of Nucleation and Growth Behavior of Nanomaterials Using a Graphene Template

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Atomic structural variations of [0001]-tilt grain boundaries during ZnO grain growth occurred by thermal treatments

Cited by 5 publications

References 24 publications

O-O bonding stabilized zinc vacancy as origin of p-type doping on Σ7 ZnO grain boundary

O-O bonding stabilized zinc vacancy as origin of p-type doping on Σ7 ZnO grain boundary

Structure modulation for synergistically optimizing photoluminescence and conductive property in EuNbO4–CaMoO4 ceramics

High‐Resolution Observation of Nucleation and Growth Behavior of Nanomaterials Using a Graphene Template

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Product

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Structure modulation for synergistically optimizing photoluminescence and conductive property in EuNbO₄–CaMoO₄ ceramics