Near-infrared electroluminescent devices based on colloidal HgTe quantum dot arrays

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O'Connor, Éamon
O'Riordan, Alan
Doyle, Hugh
Moynihan, Shane
Cuddihy, Aoife
Redmond, Gareth
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American Institute of Physics
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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.
Quantum dots , Nanocrystals , Photoluminescence , Electroluminescence , Colloidal systems , II-VI semiconductors , Mercury compounds , Light emitting devices , Infrared spectra
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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