Ultrafast Charge and Triplet State Formation in Diketopyrrolopyrrole Low Band Gap Polymer/Fullerene Blends: Influence of Nanoscale Morphology of Organic Photovoltaic Materials on Charge Recombination to the Triplet State

Table 2

Effects of laser fluence (in μJ/cm²) on maximum populations of triplet state formation () and total charge transfer state formation () together with the lifetimes of CT states () and triplet states () as well as the rise times for the triplet states () obtained for COARSE as well as for FINE blend films. Also shown are the lifetimes of the Franck-Condon state (), of the hot singlet state (), and of the hot CT state ().

Laser fluence (μJ/cm^2)			(ps)	(ps)	(ps)	(ps)	(ns)	(ps)	(ps)	(ps)
COARSE
28	0.20	0.80	0.22	0.52	4.26	52	2.0	0.52	4.26	52
12	0.55	0.55	0.29	2.56	22	126	2.9		22	126
4	0.60	0.5	0.28	2.4	37	318	3.4		37	318
FINE
28	0.20	0.80	0.20	0.39	5.5	60	2.5	0.39	5.5	60
12	0.62	0.45	0.29	2.86	40	410	4.5		40	410
4	0.7	0.4	0.20	1.25		900	5.5			900