Browse > Article
http://dx.doi.org/10.6117/kmeps.2021.28.4.069

A Study on the Characteristics of a Quantum Dots Light-Emitting Diodes Using a Mixed Layer of Quantum Dots and Hole Transport Materials  

Yoon, Changgi (Department of Advanced Materials Engineering, Kyonggi University)
Oh, Seongkeun (Department of Advanced Materials Engineering, Kyonggi University)
Kim, Jiwan (Department of Advanced Materials Engineering, Kyonggi University)
Publication Information
Journal of the Microelectronics and Packaging Society / v.28, no.4, 2021 , pp. 69-72 More about this Journal
Abstract
Various studies for QLEDs using inkjet printing has been actively conducted. Multilayers in QLEDs need an orthogonal process inevitably using different solvents and it makes the inkjet printing process more difficult and expensive. Therefore, coating two layers in a single process can reduce the fabrication step, resulting in the process time. In this study, we fabricated QLEDs of standard structure using a mixture of emission layer and hole transport layer. The mixed layer was fabricated by dissolving TFB and QDs in chlorobenzene, and the maximum luminance of the device was 45,850 cd/m2. It shows the bright future of the electroluminescence devices applied with inkjet printing process.
Keywords
Quantum dots; Hole transport materials; Mixed layer;
Citations & Related Records
연도 인용수 순위
  • Reference
1 J. Lim, W. K. Bae, J. Kwak, S. Lee, C. Lee, and K. Char, "Perspective on synthesis, device -structures, and printing processes for quantum dot displays", Opt. Mater. Express, 2, 594 (2012).   DOI
2 K. H. Lee, J. H. Lee, W. S. Song, Ko. H, C. H. Lee, J. H. Lee, and H. Yang, "Highly efficient, color-pure, color-stable blue quantum dot light-emitting devices", ACS Nano, 7, 7295 (2013).   DOI
3 Y. Liu, F. Liu, Z. Xu, C. Zheng, T. Guo, X. Xie, L. Qian, D. Fu and X. Yan, "Efficient All-Solution Processed Quantum Dot Light Emitting Diodes Based on Inkjet Printing Technique", ACS Appl. Mater. Interfaces, 9, 30 (2017).
4 V. Colivn, M. Schlamp, and A. P. Alivisatos, "Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer", Nature, 370, 354 (1994).   DOI
5 C. Y. Han, K. H. Lee, H. S. Yang, "Electroluminescence Quantum Dot Light-Emitting Diodes", Information display, 17, 2 (2016).
6 J. S. Shin, J. H. Yu, S. B. Heo and S. J. Kang, "Optimization of Hole Injection and Transport Layers for High-Performance Quantum-Dot Light-Emitting Diodes", Journal of the Korean Physical Society, 75(12), 1033-1037 (2019).   DOI
7 M. Chen, L. Xie, C. Wei, Y. Yi, X. Chen, J. Yang, J. Zhuang, F. Li, W. Su and Z. Cui, "High performance inkjet-printed QLEDs with 18.3% EQE: improving interfacial contact by novel galogen-free binary solvent system", Nano Reasearch, 14, 4125-4131 (2021).
8 Z. Xing, J. Zhuang, C. Wei, D. Zhang, Z. Xie, X. Xu, S. Ji, J. Tang, W. Su and Z. Cui, "Inkjet-Printed Quantum Dot Light-Emitting Diodes with an Air-Stable Hole Transport Material", ACS appl. Mater. Interfaces, 9(19), 16351-16359 (2017).   DOI
9 M. G. Han, Y. K. Lee, H. Kwon, H. J. Lee, T. Y. Kim, Y. H. Won and E. J. Jang, "InP-Based Quantum Dot Light-Emitting Diode with a Blended Emissive Layer", ACS Energy Lett., 6, 1577-1585 (2021).   DOI
10 S. Jia, H. Tang, J. Ma, S. Ding, X. Qu, B. Xu, Z. Wu, G. Li, P. Liu, K. Wang and X. W. Sun, "High Performance Inkjet-Printed Quantum-Dot Light-Emitting Diodes with High Operational Stability", Adv. Optical Mater., 2101069 (2021).
11 S. K. Kim, J. H. Kim, H. S. Yang and Y. S. Kim, "A Study on the Effect of Electrical Characteristics of HTL on Electrical Properties of QLED and its Efficiency", SID Symposium Digest of Technical Papers, 49(1), 1632-1635 (2018).   DOI