Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/80265
Title: High-energy-level blue phosphor for solution-processed white organic light-emitting diodes with efficiency comparable to fluorescent tubes
Authors: Wang, SM
Zhao, L
Zhang, BH
Ding, JQ
Xie, ZY
Wang, LX
Wong, WY 
Issue Date: 2018
Source: iScience, Aug. 2018, v. 6, p. 128-137 How to cite?
Journal: iScience 
Abstract: A high-energy-level blue phosphor Flr-p-OC8 has been developed for solution-processed white organic light-emitting diodes (WOLEDs) with comparable fluorescent tube efficiency. Benefiting from the electron-donating nature of the introduced alkoxy, Flr-p-OC8 shows not only efficient blue light but also elevated highest occupied molecular orbital/lowest unoccupied molecular orbital levels to well match the dendritic host H2. Consequently, the hole scattering between Flr-p-OC8 and H2 can be prevented to favor the direct exciton formation on the blue phosphor, leading to reduced driving voltage and thus improved power efficiency. By exploiting this approach, a maximum power efficiency of 68.5 lm W-1 is achieved for Flr-p-OC(8-)based white devices, slightly declining to 47.0 lm W-1 at a practical luminance of 1,000 cd m(-2). This efficiency can be further raised to 96.3 lm W-1 @ 1,000 cd m(-2) when a half-sphere is applied to increase light out-coupling. We believe that our results can compete with commercial fluorescent tubes, representing an important progress in solution-processed WOLEDs.
URI: http://hdl.handle.net/10397/80265
EISSN: 2589-0042
DOI: 10.1016/j.isci.2018.07.016
Rights: © 2018 The Author(s).
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
The following publication Wang, S.M., Zhao, L., Zhang, B.H., Ding, J.Q., Xie, Z.Y., Wang, L.X., & Wong, W.Y. (2018). High-energy-level blue phosphor for solution-processed white organic light-emitting diodes with efficiency comparable to fluorescent tubes. iScience, 6, 128-137 is available at https://dx.doi.org/10.1016/j.isci.2018.07.016
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