Figure 7.

Emission decay and time resolved spectra obtained at different delay times for DPTZ‐DBTO2 dispersed in zeonex at RT. a) ¹CT, prompt fluorescence emission spectra showing a contribution from ¹LE fluorescence at very early times (less than 3 ns). b) ¹CT fluorescence, possibly also containing a DF contribution, emitting around 560 nm between 23 and 63 ns. c) From 73 ns to 1.1 μs, the ¹CT emission is dominated by delayed fluorescence, and at later times the contribution of the far more slowly decaying ³LE phosphorescence emerges, causing a blueshift in the emission peak. d) ¹CT delayed fluorescence, decaying from 1.5 to 11.2 μs. The relatively stronger contribution of the underlying ³LE phosphorescence causes the emission maxima to effectively shift to shorter wavelengths. e,f) ¹CT delayed fluorescence, decaying from 15.8 to 500 μs, showing a continuous blueshift in the maxima toward 505 nm where the ³LE phosphorescence peaks.