Novel, Flexible and Low-power Driven AC Electroluminescent Lamp from Carbon Nanotube Embedded Phosphor Material

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 We present a novel, cost-effective and simple technique operable at room temperature, wherein a non-electroluminescent (non-EL) material is being converted to exhibit stable and efficient EL using CNTs.  The role of CNT has been identified as a local electric field enhancer and facilitator in the hot carrier injection inside the ZnS crystal to conceive EL in the hybrid material.  Commercial ZnS:Cu phosphor (P-22G having quantum yield of 65±5%) is blended with a very low (0.01 wt.%) concentration of multi-walled CNTs; annealed in presence of a flux to produce an efficient and stable EL phosphor hybrid material.  For the first time, we are successful in designing a novel device driven by alternating current (AC) and we anticipate the process could be easily scaled up to larger area panels.  The electro-optical properties of the newly developed AC-EL device have been thoroughly discussed.

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Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2013: Advanced Materials, CNTs, Particles, Films and Composites (Volume 1)
Published: May 12, 2013
Pages: 721 - 724
Industry sector: Advanced Materials & Manufacturing
Topic: Advanced Materials for Engineering Applications
ISBN: 978-1-4822-0581-7