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Journal Article
Metal Oxide Charge Transfer Complex for Effective Energy Band Tailoring in Multilayer Optoelectronics
- Authors
- Moohyun Kim, Byoung-Hwa Kwon, Chul Woong Joo, Myeong Seon Cho, Hanhwi Jang, Ye ji Kim, Hyunjin Cho, Duk Young Jeon, Eugene N. Cho, Yeon Sik Jung
- Issue Date
- 2022-01
- Citation
- Nature Communications, v.13, pp.1-9
- ISSN
- 2041-1723
- Publisher
- Nature Research
- Language
- English
- Type
- Journal Article
- Abstract
- Metal oxides are intensively used for multilayered optoelectronic devices such as organic light-emitting diodes (OLEDs). Many approaches have been explored to improve device performance by engineering electrical properties. However, conventional methods cannot enable both energy level manipulation and conductivity enhancement for achieving optimum energy band configurations. Here, we introduce a metal oxide charge transfer complex (NiO:MoO3-complex), which is composed of few-nm-size MoO3 domains embedded in NiO matrices, as a highly tunable carrier injection material. Charge transfer at the finely dispersed interfaces of NiO and MoO3 throughout the entire film enables effective energy level modulation over a wide work function range of 4.47 ?? 6.34 eV along with enhanced electrical conductivity. The high performance of NiO:MoO3-complex is confirmed by achieving 189% improved current efficiency compared to that of MoO3-based green OLEDs and also an external quantum efficiency of 17% when applied to blue OLEDs, which is superior to 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile-based conventional devices.
- KSP Keywords
- Band tailoring, Blue OLEDs, Carrier injection, Charge transfer complex(CTC), Conductivity enhancement, Conventional devices, Conventional methods, Effective energy, Electrical conductivity(EC), Energy band, Enhanced electrical conductivity
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
