Light-emitting diodes with quantum dot luminophores show promise in the development of next-generation displays, because quantum dot luminophores demonstrate high quantum yields, extremely narrow emission, spectral tunability and high stability, among other beneficial characteristics. However, the inability to achieve size-selective quantum dot patterning by conventional methods hinders the realization of full-colour quantum dot displays. Here, we report the first
demonstration of a large-area, full-colour quantum dot display, including in flexible form, using optimized quantum dotfilms, and with control of the nano-interfaces and carrier behaviour. Printed quantum dot films exhibit excellentmorphology, well-ordered quantum dot structure and clearly defined interfaces. These characteristics are achieved throughthe solvent-free transfer of quantum dot films and the compact structure of the quantum dot networks. Significantenhancements in charge transport/balance in the quantum dot layer improve electroluminescent performance. A method using plasmonic coupling is also suggested to further enhance luminous efficiency. The results suggest routes towards creating large-scale optoelectronic devices in displays, solid-state lighting and photovoltaics
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[ Last edited by taozhikai on 2011-6-24 at 22:03 ] |