Giant Piezoelectric Size Effects in Zinc Oxide and Gallium Nitride Nanowires. A First Principles Investigation

Nano Letters ◽  
2011 ◽  
Vol 11 (2) ◽  
pp. 786-790 ◽  
Author(s):  
Ravi Agrawal ◽  
Horacio D. Espinosa
Keyword(s):  
Zinc Oxide ◽  
Gallium Nitride ◽  
First Principles ◽  
Size Effects

scholarly journals Thermal Conductivity of Wurtzite Zinc-Oxide from First-Principles Lattice Dynamics – a Comparative Study with Gallium Nitride

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Xufei Wu ◽  
Jonghoon Lee ◽  
Vikas Varshney ◽  
Jennifer L. Wohlwend ◽  
Ajit K. Roy ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Zinc Oxide ◽  
Gallium Nitride ◽  
Comparative Study ◽  
First Principles ◽  
Lattice Dynamics

A detailed characterization of the transient electron transport within zinc oxide, gallium nitride, and gallium arsenide

2012 ◽  
Vol 112 (12) ◽  
pp. 123722 ◽  
Author(s):  
Walid A. Hadi ◽  
Shamsul Chowdhury ◽  
Michael S. Shur ◽  
Stephen K. O'Leary
Keyword(s):  
Gallium Arsenide ◽  
Zinc Oxide ◽  
Gallium Nitride ◽  
Electron Transport ◽  
Detailed Characterization

ZINC OXIDE NANOPARTICLES FOR ULTRAVIOLET PHOTODETECTION

2011 ◽  
Vol 20 (01) ◽  
pp. 183-194 ◽  
Author(s):  
SHAYLA SAWYER ◽  
LIQIAO QIN ◽  
CHRISTOPHER SHING
Keyword(s):  
Zinc Oxide ◽  
Gallium Nitride ◽  
Zno Nanoparticles ◽  
Green Emission ◽  
Synthesis Process ◽  
Voltage Response ◽  
Zno Nanoparticle ◽  
Linear Current ◽  
Current Voltage ◽  
Lift Off

Zinc Oxide ( ZnO ) nanoparticles were created by a top-down wet-chemistry synthesis process ( ZnO - A ) and then coated with polyvinyl-alcohol (PVA) ( ZnO - U ). In ZnO - U , strong UV emission was apparent while the parasitic green emission, which normally appears in ZnO suspensions, was suppressed. A standard lift-off process via e-beam lithography was used to fabricate a detector by evaporating Aluminum ( Al ) as ohmic electrodes on the ZnO nanoparticle film. Photoconductivity experiments showed that linear current-voltage response were achieved and the ZnO - U nanoparticles based detector had a ratio of UV photo-generated current more than 5 times better than that of the ZnO - A based detector. In addition, non-linear current-voltage responses were observed when interdigitated finger Gold ( Au ) contacts were deposited on ZnO - U . The UV generated current to dark current ratios were between 4 and 7 orders of magnitude, showing better performance than the photodetector with Al contacts. ZnO - U were also deposited on Gallium Nitride ( GaN ) and Aluminum Gallium Nitride ( AlGaN ) substrates to create spectrally selective photodetectors. The responsivity of detector based on AlGaN is twice that of commercial UV enhanced Silicon photodiodes. These results confirmed that ZnO nanoparticles coating with PVA is a good material for small-signal, visible blind, and wavelength selective UV detection.

scholarly journals Optoelectronic Properties of Zinc Oxide: A First-Principles Investigation Using the Tran-Blaha Modified Becke-Johnson Potential

2019 ◽  
Vol 256 (4) ◽  
pp. 1800380 ◽  
Author(s):  
Rosely M. V. S. Almeida ◽  
Andreia Luisa da Rosa ◽  
Thomas Frauenheim ◽  
Jailton S. de Almeida
Keyword(s):  
Zinc Oxide ◽  
First Principles ◽  
Optoelectronic Properties

Size effects and odd–even effects on hydrogen adsorption on Janus MoSSe nanosheets: first-principles studies

2020 ◽  
Vol 5 (4) ◽  
pp. 829-834 ◽  
Author(s):  
Paul H. Joo ◽  
Jingning Zhang ◽  
Kesong Yang
Keyword(s):  
First Principles ◽  
Size Effects ◽  
Hydrogen Adsorption

This work reveals the size and odd–even effects on hydrogen adsorption on the Janus MoSSe monolayer nanostructure.

scholarly journals Precise radiative lifetimes in bulk crystals from first principles: the case of wurtzite gallium nitride

2019 ◽  
Vol 32 (8) ◽  
pp. 084001 ◽  
Author(s):  
Vatsal A Jhalani ◽  
Hsiao-Yi Chen ◽  
Maurizia Palummo ◽  
Marco Bernardi
Keyword(s):  
Gallium Nitride ◽  
First Principles ◽  
Bulk Crystals ◽  
Radiative Lifetimes
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