AFM image and lineout of (0001) after annealing. The step height on each terrace is 0.22 nm.
Fluorescence trajectory of -PTCDI on (0001). The solid line shows the CPD analysis with three intensity levels (on, off, or dead and shutter closed). Uncertainties in duration and intensity of each period (75 ms and 0.13 counts/25 ms) are comparable to the size of the CPD line.
(a) On probability density for 51 molecules and (b) off probability density for 25 molecules observed on sapphire (0001).
On probability density without the last on period in each trajectory, 25 molecules and 42 events.
Energy level scheme of -PTCDI/ (0001) and proposed kinetic scheme explaining power-law distributed on and off periods. Steps (i)–(iii) see text. VB: valence band. CB: conduction band. VL: vacuum level. , : ground and excited singlet states of -PTCDI. , : ground and excited states of cation. , : polaronic acceptor and donor states. , : rate constants for turning molecule on or off.
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