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- W2625722875 abstract "Luminous efficacy (LE), which is given by the ratio of luminous flux to power, is commonly used to measure the power consumption of a light source. Unfortunately, the LE of white organic light‐emitting diodes (OLEDs) still lags behind those of inorganic LED for practically used (>100 lm W −1 ). In this paper, an ultraefficient white OLED is discussed based on a newly designed thermally activated delayed fluorescent exciplex host. The resulting white OLED delivers an unusually high forward‐viewing LE of 105.0 lm W −1 and external quantum efficiency (EQE) η ext of ≈30% (without using any optical out‐coupling techniques). As far as it is known, specifically, these efficiencies are the highest values among the published white OLEDs to date. Two‐color warm white emission is realized with Commission International de I'Eclairage coordinates of (0.40, 0.48) at a brightness of 1000 cd m −2 . Furthermore, the well‐matched energy alignment endows the device with an extremely low turn‐on voltage (≈2.5 V). Such high efficiencies and excellent device performance should benefit from the advantages of exciplex material solely used as the host. Therefore, this study anticipates that the findings have great potential to boost the LE of OLEDs, and more importantly, fulfill the power efficacy requirement for lighting applications." @default.
- W2625722875 created "2017-06-23" @default.
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- W2625722875 date "2017-06-14" @default.
- W2625722875 modified "2023-10-17" @default.
- W2625722875 title "White Organic LED with a Luminous Efficacy Exceeding 100 lm W<sup>−1</sup> without Light Out-Coupling Enhancement Techniques" @default.
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- W2625722875 doi "https://doi.org/10.1002/adfm.201701314" @default.
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