Color tuning and improved performance of poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1, 4-phenylenevinylene]-based polymer light emitting diode using cadmium selenide/zinc sulphide core shell uncapped quantum dots as dopants

Madan, Shikha; Kumar, Jitender; Madhwal, Devinder; Singh, Inderpreet; Bhatnagar, Pramod Kumar; Mathur, Parmatma Chand

doi:doi:10.1117/1.3604001

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Journal of Nanophotonics / Volume 5 / Research Papers

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Color tuning and improved performance of poly[2-methoxy-5-(2^′-ethyl-hexyloxy)-1, 4-phenylenevinylene]-based polymer light emitting diode using cadmium selenide/zinc sulphide core shell uncapped quantum dots as dopants

J. Nanophoton. 5, 053518 (Aug 09, 2011); http://dx.doi.org/10.1117/1.3604001

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Abstract

References (17)

Shikha Madan, Jitender Kumar, Devinder Madhwal, Inderpreet Singh, Pramod Kumar Bhatnagar, and Parmatma Chand Mathur

University of Delhi South Campus, Department of Electronic Science, Benito Juarez Road, New Delhi - 110021, India

A polymer light emitting diode (PLED) based on poly[2-methoxy-5-(2^′-ethyl-hexyloxy)-1,4-phenylene vinylene]:CdSe/ZnS core shell uncapped quantum dots (QDs) was fabricated. It was observed that the presence of QDs in the polymer tunes the emission spectrum of the PLED as their QDs concentration increases to 10% w/w and above. It was also found that the QDs present in the polymer improved the PLED luminance by ∼20 times at a typical current density of 75 mA/cm². This was attributed to the suppression of nonradiative electrostatic energy transfer from excitons to the metallic cathode due to the insertion of a high dielectric constant QD layer. Also, the presence of QDs layer between the active layer and the cathode shifts the recombination zone away from the cathode. This reduces the diffusion of radiative excitons into the metal electrode.

History

Received Jan 04, 2011
Accepted Jun 06, 2011
Revised Jun 03, 2011
Published online Aug 09, 2011

Digital Object Identifier

http://dx.doi.org/10.1117/1.3604001

Citation

Shikha Madan, Jitender Kumar, Devinder Madhwal, Inderpreet Singh, Pramod Kumar Bhatnagar and Parmatma Chand Mathur, "Color tuning and improved performance of poly[2-methoxy-5-(2^′-ethyl-hexyloxy)-1, 4-phenylenevinylene]-based polymer light emitting diode using cadmium selenide/zinc sulphide core shell uncapped quantum dots as dopants", J. Nanophoton. 5, 053518 (Aug 09, 2011); http://dx.doi.org/10.1117/1.3604001