2017
DOI: 10.1002/adfm.201704278
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High‐Efficiency and Stable Quantum Dot Light‐Emitting Diodes Enabled by a Solution‐Processed Metal‐Doped Nickel Oxide Hole Injection Interfacial Layer

Abstract: Stabilization is one critical issue that needs to be improved for future application of colloidal quantum dot (QD)‐based light‐emitting diodes (QLEDs). This study reports highly efficient and stable QLEDs based on solution‐processsed, metal‐doped nickel oxide films as hole injection layer (HIL). Several kinds of metal dopants (Li, Mg, and Cu) are introduced to improve the hole injection capability of NiO films. The resulting device with Cu:NiO HIL exhibits superior performance compared to the state‐of‐the‐art … Show more

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Cited by 125 publications
(81 citation statements)
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“…In addition, the HTLs also function as electron blocking layer, and therefore, they should have low LUMO levels to block the excess electrons overflowing from the QDs. Among the reported HTLs, PVK and TFB are the two most widely used HTLs in blue QLEDs due to their strengths of solution‐processable property, deep HOMO level, and high hole mobility …”
Section: Resultsmentioning
confidence: 99%
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“…In addition, the HTLs also function as electron blocking layer, and therefore, they should have low LUMO levels to block the excess electrons overflowing from the QDs. Among the reported HTLs, PVK and TFB are the two most widely used HTLs in blue QLEDs due to their strengths of solution‐processable property, deep HOMO level, and high hole mobility …”
Section: Resultsmentioning
confidence: 99%
“…Recently, colloidal quantum dot (QD) light‐emitting diodes (QLEDs) have been extensively investigated thanks to their unique optical and electrical properties such as high color saturation, tunable emission color, favorable stability, and ease of solution processability. These superiorities make QLEDs promising candidates for new generation display technology . With the rapid development of QD materials and device structures, the performances of red and green devices have been substantially improved; for example, the external quantum efficiencies (EQE) of red and green QLEDs have reached 20.5% and 21% and they have been lately improved from 23.1% to 27.6% by using tandem structures, which are very close to those of organic LEDs (OLEDs) .…”
Section: Introductionmentioning
confidence: 99%
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