将LiF插入到发光层Alq3中，制备了有机电致发光器件(OLED)，其器件的结构为：ITO/NPB (45 nm)/Alq3 (x nm)/LiF (0.3 nm)/Alq3［(45-x) nm］/Al(150 nm)。发现器件的电致发光谱(Electroluminescence spectra, EL)有非常明显的展宽现象，这为白光器件的制备提供了一条简单的途径。通过对比LiF在Alq3中不同厚度处的发光谱，发现在x=10时谱线展宽最显著，器件最大亮度在22 V时达到8 260 cd/m2，最大效率可达 4.83 cd/A，并对其光谱展宽的机理及器件特性进行了分析。

A novel organic electroluminescent device was fabricated by interposing a thin LiF layer in Alq3 layer in this work. The structure of the device is ITO/NPB (45 nm)/Alq3 (x nm)/LiF (0.3 nm)/Alq3 ［(45-x) nm］/Al (150 nm). All the devices (x=5, 10, 15) showed expanded EL spectra, and the spectrum expanding is more obvious in the device with x=10 than the others. The highest brightness of this device reached 8 260 cd/m2 at a fixed bias of 22 V. The spectra contain tricolor, so this is a simple method to realize white light emitting. We also elucidated the mechanism for expanded EL spectra and investigated the properties of these devices.