Linked Life Data

21508502

Source:http://linkedlifedata.com/resource/pubmed/id/21508502

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
24
pubmed:dateCreated
2011-5-5
pubmed:abstractText
In this paper, we report a fabrication, characterization and stability study of p-GaN/n-ZnO nanorod heterojunction light-emitting devices (LEDs). The LEDs were assembled from arrays of n-ZnO vertical nanorods epitaxially grown on p-GaN. LEDs showed bright electroluminescence in blue (440 nm), although weaker violet (372 nm) and green-yellow (550 nm) spectral components were also observed. The device characteristics are generally stable and reproducible. The LEDs have a low turn-on voltage (?5 V). The electroluminescence (EL) is intense enough to be noticed by the naked eye, at an injection current as low as ? 40 µA (2.1 × 10(-2) A cm(-2) at 7 V bias). Analysis of the materials, electrical and EL investigations point to the role of a high quality of p-n nano-heterojunction which facilitates a large rectification ratio (320) and a stable reverse current of 2.8 µA (1.4 × 10(-3) A cm(-2) at 5 V). Stability of EL characteristics was investigated in detail. EL intensity showed systematic degradation over a short duration when the LED was bias-stressed at 30 V. At smaller bias (<20 V) LEDs tend to show a stable and repeatable EL characteristic. Thus a simple low temperature solution growth method was successfully exploited to realize nanorod/film heterojunction LED devices with predictable characteristics.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jun
pubmed:issn
1361-6528
pubmed:author
pubmed:issnType
Electronic
pubmed:day
17
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
245202
pubmed:year
2011
pubmed:articleTitle
Violet-blue LEDs based on p-GaN/n-ZnO nanorods and their stability.
pubmed:affiliation
Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon Tong, Hong Kong.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't