制备了以TCTA和CBP为空穴传输层、Eu(DBM)3Bath为发光层、TPBI为电子传输层的有机多层薄膜微腔电致发光器件。通过光学微腔来改变Eu(DBM)3Bath不同能级之间的跃迁速率, 从而实现了Eu3+的5D0→7F0(580 nm)、5D0→7F2(612 nm)以及5D0→7F3(652 nm)的多色电致发光。其中, 发光主峰在5D0→7F2(612 nm)的微腔OLED最大电流效率超过20 cd/A, 最大亮度超过1 300 cd/m2。

The multi-layer microcavity OLEDs have been fabricated with hole transport layers of CBP and TCTA, an emissive layer of Eu(DBM)3Bath, and an electron transport layer of TPBI. Multicolor electroluminescence from the transition of Eu3+ iron with three peaks at 580 nm (5D0→7F0), 612 nm (5D0→7F2), and 652 nm (5D0→7F3) was achieved by changing the transition rate between the different energy levels of Eu(DBM)3Bath through optical microcavity. The microcavity OLED device with an EL peak of 612 nm shows the maximum current efficiency more than 20 cd/A, and maximum luminance over 1 300 cd/m2.