Document Detail


A nanocomposite ultraviolet photodetector based on interfacial trap-controlled charge injection.
MedLine Citation:
PMID:  23142945     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Ultraviolet photodetectors have applications in fields such as medicine, communications and defence, and are typically made from single-crystalline silicon, silicon carbide or gallium nitride p-n junction photodiodes. However, such inorganic photodetectors are unsuitable for certain applications because of their high cost and low responsivity (<0.2 A W(-1)). Solution-processed photodetectors based on organic materials and/or nanomaterials could be significantly cheaper to manufacture, but their performance so far has been limited. Here, we show that a solution-processed ultraviolet photodetector with a nanocomposite active layer composed of ZnO nanoparticles blended with semiconducting polymers can significantly outperform inorganic photodetectors. As a result of interfacial trap-controlled charge injection, the photodetector transitions from a photodiode with a rectifying Schottky contact in the dark, to a photoconductor with an ohmic contact under illumination, and therefore combines the low dark current of a photodiode and the high responsivity of a photoconductor (∼721-1,001 A W(-1)). Under a bias of <10 V, our device provides a detectivity of 3.4 × 10(15) Jones at 360 nm at room temperature, which is two to three orders of magnitude higher than that of existing inorganic semiconductor ultraviolet photodetectors.
Authors:
Fawen Guo; Bin Yang; Yongbo Yuan; Zhengguo Xiao; Qingfeng Dong; Yu Bi; Jinsong Huang
Related Documents :
14725465 - Synthesis and molecular recognition of pyrenophanes with polycationic or amphiphilic fu...
1118625 - Lumbar radiculography with metrizamide. a nonionic water-soluble contrast medium.
22905515 - Cdse/cd(x)zn1-xs core/shell nanocrystals: core morphology and luminescent property.
22849185 - Fabrication of copper nanoparticles in a thick polyimide film cured by rapid thermal an...
19435215 - Control of listeria monocytogenes on frankfurters by dipping in hops beta acids solutions.
20617275 - Interaction of water and ammonium in nahy zeolite as detected by combined ir and gravim...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-11
Journal Detail:
Title:  Nature nanotechnology     Volume:  -     ISSN:  1748-3395     ISO Abbreviation:  Nat Nanotechnol     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101283273     Medline TA:  Nat Nanotechnol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  An electrically and mechanically self-healing composite with pressure- and flexion-sensitive propert...
Next Document:  Potassium channels: a review of broadening therapeutic possibilities for neurological diseases.