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Title: Regulating charge and exciton distribution in high-performance hybrid white organic light-emitting diodes with n-type interlayer switch
Authors: Luo, Dongxiang
Yang, Yanfeng
Xiao, Ye
Zhao, Yu
Yang, Yibin
Liu, Baiquan
Keywords: White Light
DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2017
Source: Luo, D., Yang, Y., Xiao, Y., Zhao, Y., Yang, Y., & Liu, B. (2017). Regulating charge and exciton distribution in high-performance hybrid white organic light-emitting diodes with n-type interlayer switch. Nano-Micro Letters, 9(4), 37-. doi:10.1007/s40820-017-0138-4
Series/Report no.: Nano-Micro Letters
Abstract: The interlayer (IL) plays a vital role in hybrid white organic light-emitting diodes (WOLEDs); however, only a negligible amount of attention has been given to n-type ILs. Herein, the n-type IL, for the first time, has been demonstrated to achieve a high efficiency, high color rendering index (CRI), and low voltage trade-off. The device exhibits a maximum total efficiency of 41.5 lm W−1, the highest among hybrid WOLEDs with n-type ILs. In addition, high CRIs (80–88) at practical luminances (≥1000 cd m−2) have been obtained, satisfying the demand for indoor lighting. Remarkably, a CRI of 88 is the highest among hybrid WOLEDs. Moreover, the device exhibits low voltages, with a turn-on voltage of only 2.5 V (>1 cd m−2), which is the lowest among hybrid WOLEDs. The intrinsic working mechanism of the device has also been explored; in particular, the role of n-type ILs in regulating the distribution of charges and excitons has been unveiled. The findings demonstrate that the introduction of n-type ILs is effective in developing high-performance hybrid WOLEDs.
ISSN: 2311-6706
DOI: 10.1007/s40820-017-0138-4
Schools: School of Electrical and Electronic Engineering 
Research Centres: LUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays 
Rights: © 2017 The Author(s). This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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