Abstract
The present work is aimed at improving the efficiency of light-emitting diodes (LEDs) through the amalgamation of polymeric materials and quantum dots (QDs) in nanocomposites. Herein, we report on the polytriphenylamine-based chalcone (PTpC) or polycarbazole-based chalcone- (PCzC-) QDs mixture nanocomposites as emissive layers for polymer LEDs (PLEDs). QDs were evenly dispersed in the polymer matrix and the synthesized PTpC-QDs and PCzC-QDs nanocomposites were able to form smooth thin films. The luminance characteristics of PTpC-QDs and PCzC-QDs nanocomposites were better than those of the pristine QD, PTpC, and PCzC materials, owing to the high charge-carrier transport ability of polymer-QDs nanocomposites. These results indicate that the proposed polymer-QDs nanocomposites could be potential candidates for application in PLEDs.
Highlights
Significant efforts have been placed in developing high-performance polymeric materials in optoelectronic applications, including polymer light-emitting diodes (PLEDs) [1,2,3]
Fabrication and measurement of the PLED devices: PLED devices were fabricated by using pure polymers (PTpC and PCzC), quantum dots (QDs) (CdSeS@ZnS for red, CdZnSeS@ZnS for green, and CdZnS@ZnS for blue), and the polymer-QDs nanocomposites as an EML. 100 nm thick ITO electrode was deposited on Corning glass by sputtering for use as an anode
We reported on two polymer (PTpC and PCzC)-QDs nanocomposites for PLEDs
Summary
Significant efforts have been placed in developing high-performance polymeric materials in optoelectronic applications, including polymer light-emitting diodes (PLEDs) [1,2,3]. QDs materials have been widely used to fabricate display devices because of their unique physical properties, especially their tunable band gap energy derived by tuning the particle size, which generates the quantum confinement effect [7]. Because of their charge immobility, indissolubility, and photoluminescence instability, QDs usually need to be modulated by a passivation process to increase the luminance efficiency of the device [8]. The synthesized PTpC-QDs and PCzC-QDs nanocomposites were used to fabricate PLED devices as an EML, and their luminescence characteristics were compared with those of the LEDs with the pristine PTpC, PCzC, and QDs
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