Browse > Article
http://dx.doi.org/10.6117/kmeps.2020.27.3.069

A Comparison Study on Quantum Dots Light Emitting Diodes Using SnO2 and TiO2 Nanoparticles as Solution Processed Double Electron Transport Layers  

Shin, Seungchul (Department of Advanced Materials Engineering, Kyonggi University)
Kim, Suhyeon (Department of Advanced Materials Engineering, Kyonggi University)
Jang, Seunghun (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.27, no.3, 2020 , pp. 69-72 More about this Journal
Abstract
In this study, the inverted structured electroluminescence (EL) devices were fabricated with double electron transport layers (ETLs). The conduction band minimum (CBM) of TiO2 NPs is lower than SnO2 NPs. Therefore, it is expected that inserting TiO2 NPs between the SnO2 layer and the emission layer (EML) will reduce the energy barrier and transport electrons smoothly. The quantum dot light emitting diodes (QLEDs) with double ETLs showed the enhanced emission characteristics than those with only SnO2 layer.
Keywords
$SnO_2$ NPs; $TiO_2$ NPs; Quantum dots; Electron transport layer;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 M. Y. Ha, "A study on the electrical and optical properties of QLEDs using ZnO nanoparticles electron transport layer", in Ph.D. Thesis, pp.1-146, Soonchunhyang University, Chungcheongnam-do (2019).
2 M. Aziz, S. S. Abbas, and W. R. W. Baharom, "Size-controlled synthesis of $SnO_2$ nano particles by sol-gel method", Materials Letters, 91, 31 (2013).   DOI
3 K. H. Lee, C. Y. Han, H. D. Kang, H. Ko, C. Lee, J. Lee, N. S. Myoung, S. Y. Yim, and H. Yang, "Highly Efficient, Color-Reproducible Full-Color Electroluminescent Devices Based on Red/Green/Blue Quantum Dot-Mixed Multilayer", ACS Nano, 9(11), 10941 (2015).   DOI
4 M. Hu, L. Zhang, S. She, J. Wu, X. Zhou, X. Li, D. Wang, J. Miao, G. Mi, H. Chen, Y. Tian, B. Xu, and C. Cheng, "Electron Transporting Bilayer of SnO$_2$ and TiO$_2$ Nanocolloid Enables Highly Efficient Planar Perovskite Solar Cells", Sol. RRL, 4, 1900331 (2020).   DOI
5 M. B. Kim, C. G. Yoon, and J. W. Kim, "A Comparison Study on Various Quantum Dots Light Emitting Diodes Using TiO$_2$ Nanoparticles as Inorganic Electron Transport Layer", J. Microelectron. Packag. Soc. 26(3), 71 (2019).
6 S. Song, G. Kang, L. Pyeon, C. Lim, G.-Y. Lee, T. Park, and J. Choi, "Systematically Optimized Bilayered Electron Transport Layer for Highly Efficient Planar Perovskite Solar Cells ($\eta$ = 21.1%)", ACS Energy Lett., 2, 2667 (2017).   DOI
7 W. Han and H. H. Park, "The Effect of Crystallinity on the Photoluminescence of TiO2 Nanoparticles", J. Microelectron. Packag. Soc, 26(1), 23 (2019).   DOI
8 K.-S. Cho, E. K. Lee, W.-J. Joo, E. Jang, T.-H. Kim, S. J. Lee, S.-J. Kwon, J. Y. Han, B.-K. Kim, B. L. Choi, and J. M. Kim, "High-performance crosslinked colloidal quantum-dot lightemitting diodes", Nature Photonics, 3, 341 (2009).   DOI
9 F. Gu, S. F. Wang, C. F. Song, M. K. Lu, Y. X. Qi, G. J. Zhou, D. Xu, and D. R. Yuan, "Synthesis and luminescence properties of $SnO_2$ nanoparticles", Chemical Physics Letters, 372, 451 (2003).   DOI
10 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", Optical Materials Express, 2(5), 594 (2012).   DOI