Inverted Quantum-Dot Light-Emitting Diodes Fabricated by All-Solution Processing

All-solution processed, multilayer, and inverted quantum-dot light-emitting diodes (QD-LEDs) are developed in this work. To protect the QDs from dissolving by the solvents of upper layers, the solvents of poly­(9-vinlycarbazole) (PVK) hole transporting layer are first investigated. The QD layer has...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2016-03, Vol.8 (8), p.5493-5498
Main Authors: Zhang, Heng, Li, Hanrun, Sun, Xiaowei, Chen, Shuming
Format: Article
Language:English
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Summary:All-solution processed, multilayer, and inverted quantum-dot light-emitting diodes (QD-LEDs) are developed in this work. To protect the QDs from dissolving by the solvents of upper layers, the solvents of poly­(9-vinlycarbazole) (PVK) hole transporting layer are first investigated. The QD layer has been less affected by o-dichlorobenzene solvent than other typical solvents like chloroform and chlorobenzene. Second, to deposit a hydrophilic poly­(ethylenedioxythiophene)/polystyrenesulfonate (PEDOT:PSS) hole injection layer on top of hydrophobic PVK, the surface energy of the PEDOT:PSS is reduced by using isopropanol as the additive. With optimized conditions, the demonstrated QD-LEDs exhibit a maximum luminance of 16290 cd/m2 and a peak current efficiency of 4.1 cd/A, which is the highest among the reported values. These results may offer a practicable platform for further research, leading to the achievement of all-solution processed, multilayer, and efficient inverted QD-LEDs.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.5b12737