Abstract
With the increasing performance demand from the display market, it has become ever more important to realize wide color gamut and low power consumption. Employing a phosphorescence‐sensitized fluorescence (PSF) mechanism, we introduced a narrow‐spectrum green light‐emitting layer (EML) to the state‐of‐the‐art OLED device structure suitable for mass production and investigate its effect on device performance. Compared with the reference phosphorescent device, the optimal PSF devices have achieved more than 20% efficiency improvement in the range of CIEx 0.17‐ 0.27, showing the advantages of high efficiency and high color purity.
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