The following study was conducted by Scientists from TCL Research, Shenzhen, People’s Republic of China; Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Science, Zhejiang, People’s Republic of China; Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR, People’s Republic of China; Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, People’s Republic of China; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, People’s Republic of China. Study is published in Nature Communications Journal as detailed below.
Nature Communications; Volume 11, Article Number: 1646; (2020)
High Efficiency and Stability of Ink-Jet Printed Quantum Dot Light Emitting Diodes
Abstract
The low efficiency and fast degradation of devices from ink-jet printing process hinders the application of quantum dot light emitting diodes on next generation displays. Passivating the trap states caused by both anion and cation under-coordinated sites on the quantum dot surface with proper ligands for ink-jet printing processing reminds a problem. Here we show, by adapting the idea of dual ionic passivation of quantum dots, ink-jet printed quantum dot light emitting diodes with an external quantum efficiency over 16% and half lifetime of more than 1,721,000 hours were reported for the first time. The liquid phase exchange of ligands fulfills the requirements of ink-jet printing processing for possible mass production. And the performance from ink-jet printed quantum dot light emitting diodes truly opens the gate of quantum dot light emitting diode application for industry.
Source:
Nature Communications
URL: https://www.nature.com/articles/s41467-020-15481-9
Citation:
Xiang, C., L. Wu, et al. (2020). “High efficiency and stability of ink-jet printed quantum dot light emitting diodes.” Nature Communications 11(1): 1646.
