1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Effect of oxygen-related surface adsorption on the efficiency and stability of ZnO nanorod array ultraviolet light-emitting diodes
Rent:
Rent this article for
USD
10.1063/1.4717714
/content/aip/journal/apl/100/20/10.1063/1.4717714
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/20/10.1063/1.4717714
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) and (b) Tilted-view SEM images of uncoated and MgZnO-coated ZnO NRAs; the scale bars are 2 μm. (c) Z-contrast TEM image of a single MgZnO-coated ZnO nanorod. (d) Line-scan composition profiles of Mg and Zn elements along the radial direction of the core/shell nanorod. (e) I-V curves of the uncoated (red dashed line) and coated (blue solid line) LEDs; the near-linear I-V characteristic in the inset verifies an ohmic contact between Ni/Au electrode and p-GaN. (f) Schematic diagram of a MgZnO-coated ZnO NRA/p-GaN heterojunction LED.

Image of FIG. 2.
FIG. 2.

(a) RT PL spectra of MgZnO-coated/uncoated ZnO NRAs and GaN film. (b) RT EL spectra and Gaussian deconvolution analysis of uncoated and coated devices measured at an injection current of 3.5 mA.

Image of FIG. 3.
FIG. 3.

(a) RT EL spectra of uncoated (left) and coated (right) devices obtained at different air-exposure periods, the injection current is fixed at 5 mA. (b) and (c) The variations of ηrr, ηnr, and RNBE/DL of both LEDs with air-exposure time; for clarity, the inset in (c) exhibits a magnified image of the last four data points.

Image of FIG. 4.
FIG. 4.

(a) RT EL spectra of the long-term air-exposed, uncoated device before (red solid line) and after (blue dashed line) vacuum desorption; the injection current is 3 mA. (b) O 1 s core-level XPS spectra of the fresh, exposed, and desorbed ZnO NRAs. (c) Schematic diagram showing the surface-mediated carrier tunneling, trapping, and recombination processes in the uncoated ZnO NRA.

Loading

Article metrics loading...

/content/aip/journal/apl/100/20/10.1063/1.4717714
2012-05-14
2014-04-18
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of oxygen-related surface adsorption on the efficiency and stability of ZnO nanorod array ultraviolet light-emitting diodes
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/20/10.1063/1.4717714
10.1063/1.4717714
SEARCH_EXPAND_ITEM