Enhanced luminance of MEH-PPV based PLEDs using single walled carbon nanotube composite as an electron transporting layer

An efficient electron transporting layer (ETL) based on single walled carbon nanotube (SWCNT) composites has been developed for poly [2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) based orange polymer light emitting diodes (PLEDs) and its effect on the performance of PLEDs has be...

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Bibliographic Details
Published in:Journal of luminescence 2010-11, Vol.130 (11), p.2157-2160
Main Authors: Singh, Inderpreet, Madhwal, Devinder, Verma, A., Kumar, A., Rait, S., Kaur, I., Bharadwaj, L.M., Bhatia, C.S., Bhatnagar, P.K., Mathur, P.C.
Format: Article
Language:English
Subjects:
Applied sciences
Electron transporting layer
Electronics
Exact sciences and technology
Luminance
Optoelectronic devices
PLEDs
Polymer-SWCNT composites
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
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Summary:An efficient electron transporting layer (ETL) based on single walled carbon nanotube (SWCNT) composites has been developed for poly [2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) based orange polymer light emitting diodes (PLEDs) and its effect on the performance of PLEDs has been examined. It is observed that with increase in SWCNT concentration, in ETL, the luminance and luminous efficiency of the PLEDs increase (about 5 times increase in luminance is observed at 5% w/w SWCNT concentration). The SWCNTs present in the MEH-PPV ETL boost the mobility of electrons injected from the cathode towards the emissive layer by establishing highly conducting percolation paths. This balances the concentration of holes and electrons in the emissive layer, which leads to enhanced emission from the PLEDs.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2010.06.011