Near-infrared electroluminescent devices based on colloidal HgTe quantum dot arrays
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Published Version
Date
2005-05
Authors
O'Connor, Éamon
O'Riordan, Alan
Doyle, Hugh
Moynihan, Shane
Cuddihy, Aoife
Redmond, Gareth
Journal Title
Journal ISSN
Volume Title
Publisher
American Institute of Physics
Published Version
Abstract
Crystalline 4.6 nm HgTe quantum dots, stabilized by 1-thioglycerol ligands, were synthesized by wet chemical methods. Room-temperature photoluminescencespectra of the dots, both in solution and as solid arrays, exhibited near-infrared emission. Light-emitting devices were fabricated by deposition of quantum dot layers onto glass∕indium tin oxide (ITO)∕3,4-polyethylene-dioxythiophene-polystyrene sulfonate (PEDOT) substrates followed by top contacting with evaporated aluminum. Room-temperature near-infraredelectroluminescence from 1mm2 ITO∕PEDOT∕HgTe∕Al devices, centered at ∼1600nm, with an external quantum efficiency of 0.02% and brightness of 150nW/mm2 at 50 mA and 2.5 V was achieved.
Description
Keywords
Quantum dots , Nanocrystals , Photoluminescence , Electroluminescence , Colloidal systems , II-VI semiconductors , Mercury compounds , Light emitting devices , Infrared spectra
Citation
O’CONNOR, É., O’RIORDAN, A., DOYLE, H., MOYNIHAN, S., CUDDIHY, A. & REDMOND, G. 2005. Near-infrared electroluminescent devices based on colloidal HgTe quantum dot arrays. Applied Physics Letters, 86, 201114. DOI: 10.1063/1.1928321
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Copyright
Copyright 2005 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, 86, 201114 (2005) and may be found at http://scitation.aip.org/content/aip/journal/apl/86/20/10.1063/1.1928321