实现彩色显示需要高效率和高色纯度的红、绿、蓝三种颜色发光。与红、绿色器件相比, 蓝光有机电致发光器件（OLED）有较低效率和较差的色纯度。为了改善器件性能, 将微腔引入到OLED中, 优化设计并制作出蓝色微腔有机电致发光器件（MOLED）：Glass/DBR/ITO/NPB/ DPVBi/Alq3/LiF/Al。得到蓝光微腔器件电致发光谱（EL）峰值位于472 nm, 与无腔器件相比, 峰值强度增强5.4倍,半峰全宽（FWHM）减小77.1%（仅为16 nm）, 光谱积分强度增加33%。微腔器件最大亮度8439 cd/m2, 最大发光效率2.4 cd/A, CIE色坐标为（X=0.14; Y=0.10）。结果表明, 由于微腔效应的存在, 导致微腔器件的EL谱线窄化和峰值强度增强, 可提高器件的色纯度, 改善器件发光性能。

Red, green, and blue emissions with high efficiency and high color purity are essential for achieving full color displays. Relative to red and green emissions, blue-emitting materials have poor color purity and efficiency. Introducing microcavity structure into organic light emitting device (OLED ) can improve the color purity and properties of the device. The microcavity structure of blue light OLED (MOLED) was optimized. MOLED was fabricated and studied with a structure of Glass/DBR/ITO/NPB/ DPVBi/Alq3/LiF/Al. Comparing the optimized microcavity (MOLED) to the noncavity devices (OLED) under the same current density, the electroluminescence (EL) peak intensity of the MOLED increased 5.4 times, the spectrum integral intensity increased 33%, while the full width at half maximum (FWHM ) decreased 4.4 times (only 16 nm), the maximum luminance of 8439 cd/m2, maximum luminous efficiency of 2.4 cd/A, and peak at 472 nm and the CIE coordinates (X=0.14, Y=0.10) were obtained in MOLED. It shows that MOLED can improve not only the color purity, but also the properties of the device. The microcavity effects such as spectra narrowing and intensity enhancement of spontaneous emission have been observed for MOLED.