Study on energy transfer in organic multilayer well structure

Photoexcited energy transfer in organic multilayer well structure devices in which Alq3 is the well layer material is discussed in terms of the different barrier layer materials, the well number, the wavelength of excitation light and the thickness of well layer. The photoluminescence intensity from the Alq3 layer is enhanced and that from the barrier layer is weakened in the devices with the multilayer well structure compared with the conventional double-layer structure as a result of effective Förster energy transfer from the barrier to the well. The photoluminescence characteristics of organic multilayer well structure devices are investigated in detail.