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White Electroluminescence Using ZnO Nanotubes/GaN Heterostructure Light-Emitting Diode.
MedLine Citation:
PMID:  20672120     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
We report the fabrication of heterostructure white light-emitting diode (LED) comprised of n-ZnO nanotubes (NTs) aqueous chemically synthesized on p-GaN substrate. Room temperature electroluminescence (EL) of the LED demonstrates strong broadband white emission spectrum consisting of predominating peak centred at 560 nm and relatively weak violet-blue emission peak at 450 nm under forward bias. The broadband EL emission covering the whole visible spectrum has been attributed to the large surface area and high surface states of ZnO NTs produced during the etching process. In addition, comparison of the EL emission colour quality shows that ZnO nanotubes have much better quality than that of the ZnO nanorods. The colour-rendering index of the white light obtained from the nanotubes was 87, while the nanorods-based LED emit yellowish colour.
Authors:
J R Sadaf; Mq Israr; S Kishwar; O Nur; M Willander
Publication Detail:
Type:  Journal Article     Date:  2010-04-04
Journal Detail:
Title:  Nanoscale research letters     Volume:  5     ISSN:  1556-276X     ISO Abbreviation:  Nanoscale Res Lett     Publication Date:  2010  
Date Detail:
Created Date:  2011-06-29     Completed Date:  2011-07-14     Revised Date:  2011-09-02    
Medline Journal Info:
Nlm Unique ID:  101279750     Medline TA:  Nanoscale Res Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  957-60     Citation Subset:  -    
Affiliation:
Department of Science and Technology (ITN), Linköping University, 60174, Norrköping, Sweden. magwi@itn.liu.se.
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