Quantum dot light-emitting diode with quantum dots inside the hole transporting layers

Date
2013
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Source Title
ACS Applied Materials and Interfaces
Print ISSN
1944-8244
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Publisher
American Chemical Society
Volume
5
Issue
14
Pages
6535 - 6540
Language
English
Type
Article
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Abstract

We report a hybrid, quantum dot (QD)-based, organic light-emitting diode architecture using a noninverted structure with the QDs sandwiched between hole transporting layers (HTLs) outperforming the reference device structure implemented in conventional noninverted architecture by over five folds and suppressing the blue emission that is otherwise observed in the conventional structure because of the excess electrons leaking towards the HTL. It is predicted in the new device structure that 97.44% of the exciton formation takes place in the QD layer, while 2.56% of the excitons form in the HTL. It is found that the enhancement in the external quantum efficiency is mainly due to the stronger confinement of exciton formation to the QDs.

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Keywords
Quantum Dots, Hybrid Oleds, Exciton, Electroluminescence, Hole Transport Layer, Noninverted Structure
Citation
Published Version (Please cite this version)