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Title: | An efficient hole transporting polymer for quantum dot light-emitting diodes | Authors: | Wu, W Chen, Z Zhan, Y Liu, B Song, W Guo, Y Yan, J Yang, X Zhou, Z Wong, WY |
Issue Date: | 9-Aug-2021 | Source: | Advanced materials interfaces, 9 Aug. 2021, v. 8, no. 15, 2100731 | Abstract: | Ideal hole transporting polymers used in quantum dot (QD) light-emitting diodes (QLEDs) should possess the features such as high conductivities and stabilized highest occupied molecular orbitals (HOMOs). Herein, an efficient polymer (named CNPr-TFB) is achieved by rationally adding a relatively weak electron-withdrawing group (2-cyanopropan-2-yl, CNPr) on a TFB like hole transporting polymer. CNPr-TFB exhibits a superior hole conductivity and much more stabilized HOMO in comparison with TFB. Therefore, much more holes are delivered into the QD emissive layers and a balanced recombination of electron and hole in the QLEDs is achieved. The external quantum efficiencies of the red, green, blue, and white QLEDs made by CNPr-TFB as the hole transporting layer (HTL) are 20.7%, 16.6%, 11.3%, and 15.0%, respectively, which are increased by 1.4–2.3 times in comparison with those of devices based on the commonly used TFB HTL. Meanwhile, the CNPr-TFB-based QLEDs also exhibit longer operation lifetimes than those of devices using the TFB HTL. These results confirm that CNPr-TFB with the features of high conductivity and stabilized HOMO can be an excellent HTL material for the QLED applications. | Keywords: | High external quantum efficiencies High hole conductivities Hole transporting polymers Quantum dot light-emitting diodes Stabilized highest occupied molecular orbitals |
Publisher: | Wiley-VCH | Journal: | Advanced materials interfaces | ISSN: | 2196-7350 | DOI: | 10.1002/admi.202100731 | Rights: | © 2021 Wiley-VCH GmbH This is the peer reviewed version of the following article: Wu, W., Chen, Z., Zhan, Y., Liu, B., Song, W., Guo, Y., ... & Wong, W. Y. (2021). An Efficient Hole Transporting Polymer for Quantum Dot Light‐Emitting Diodes. Advanced Materials Interfaces, 8(15), 2100731, which has been published in final form at https://doi.org/10.1002/admi.202100731. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
Appears in Collections: | Journal/Magazine Article |
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Wong_Efficient_Hole_Transporting.pdf | Pre-Published version | 2.7 MB | Adobe PDF | View/Open |
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