Efficient near-infrared polymer nanocrystal light-emitting diodes |
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Authors: | Tessler Nir Medvedev Vlad Kazes Miri Kan ShiHai Banin Uri |
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Institution: | Electrical Engineering Department, Microelectronic Center, and Communications and Information Technologies Center, Technion-Israel Institute of Technology, Haifa 32000, Israel. nir@ee.technion.ac.il |
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Abstract: | Conjugated polymers and indium arsenide-based nanocrystals were used to create near-infrared plastic light-emitting diodes. Emission was tunable from 1 to 1.3 micrometers--a range that effectively covers the short-wavelength telecommunications band--by means of the quantum confinement effects in the nanocrystals. The external efficiency value (photons out divided by electrons in) is approximately 0.5% (that is, >1% internal) and is mainly limited by device architecture. The near-infrared emission did not overlap the charge-induced absorption bands of the polymer. |
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