Figure 4: Electrically driven photon antibunching.
From: Electrically driven photon antibunching from a single molecule at room temperature
(a) Electrically driven photon antibunching measured on an isolated emission spot at an applied external voltage of 12 V and a current density of 3 mA cm−2. During measurement, homogenously distributed polymeric background emission summed up to 17 kcps compared with 6 kcps resulting from the single phosphorescent Ir(piq)3 molecule. Because of background photon emission, the contrast of the correlation function is reduced. The red line represents a single exponential fit to the experimental data showing a decay time of 1.1 μs. (b) Performing a background correction of the correlation function displayed in (a), it can be shown that g2(τ) adopts values smaller than 0.5 thereby proving evidence that the electrically excited emission originates from a single phosphorescent Ir(piq)3 molecule.
