Schematic drawing of triplet energy levels. The lowest triplet states (T1) of materials, such as TEBL, EML, and CCL, and the triplet exciton transfer mechanism in [EML]n = 2 and [CCL]n = 1 of the triplet MQW structure. Both triplet exciton transfer and energy transition are shown in dotted arrows, while phosphorescence from the T1 state to the ground state is shown in solid arrows.
Lee et al. Nanoscale Research Letters 2012 7:23 doi:10.1186/1556-276X-7-23