All-Solution-Processed Inverted Quantum-Dot Light-Emitting Diodes

Quantum dots are a promising new candidate for the emissive material in light-emitting devices for display applications. The fabrication of such devices by solution processing allows considerable cost reduction and is therefore very attractive for industrial manufacturers. We report all solution-pro...

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Bibliographic Details
Published inACS applied materials & interfaces Vol. 6; no. 4; pp. 2508 - 2515
Main Authors Castan, Alice, Kim, Hyo-Min, Jang, Jin
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 26.02.2014
Subjects
quantum dot
all-solution-process
inverted structure
polyoxyethylene tridecyl ether
QLED
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Summary:Quantum dots are a promising new candidate for the emissive material in light-emitting devices for display applications. The fabrication of such devices by solution processing allows considerable cost reduction and is therefore very attractive for industrial manufacturers. We report all solution-processed colloidal quantum-dot light-emitting diodes (QLEDs) with an inverted structure. The red, green, and blue devices showed maximum luminances of 12 510, 32 370, and 249 cd/m2 and turn-on voltages of 2.8, 3.6, and 3.6 V, respectively. We investigate the effect of a surfactant addition in the hole injection layer (HIL), with the aim of facilitating layer deposition and thereby enhancing device performance. We demonstrate that in the device structure presented in this study, a small amount of surfactant in the HIL can significantly improve the performance of the QLED.
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ISSN:1944-8244
1944-8252
DOI:10.1021/am404876p