Measuring the Process Variability in Triboluminescence Emission Yield for EuD4TEA

Europium dibenzoylmethide triethylammonium (EuD(4)TEA) is one of the brightest known triboluminescent materials. Emission from EuD(4)TEA can be seen in daylight and has been found to be more than twice as bright compared to inorganic ZnS compounds. Using a custom-built drop tower, the triboluminescent emission yield for five batches of EuD(4)TEA was measured. Results show that the measurement variance for the drop tower is less than 9 pct. In addition, no statistically significant batch-to-batch variations in the triboluminescent emission yield were observed for the synthesized EuD(4)TEA. It can be inferred that the measurement uncertainty for the triboluminescent emission yield between batches is, at most, on the order of a few percent.