Long-lived charge separation, increased yield

The rate of energy and electron transfer in any of these systems is an ensemble average of all sites within the layered assembly, and thus there is no single rate for any of the processes in the assemblies. Nonetheless, in addition to the increased quantum yield, assemblies constructed with the HTiNbOs spacer exhibit a long-lived charge-separated state component not observed in the a-ZrP spaced assemblies, of x = 900 ps. While there is still much to be learned from the study of multi-chromophore arrays, this synthetic approach appears to hold much promise for the creation of organic-inorganic hybrid solid state devices. 

Q and C-P-Q species discussed above, we may ascribe this transient to the species C -P-Qa-Qb - The quantum yield of this long-lived charge-separated state was found to be 0.23 at ambient temperatures. Cooling the sample to 240 K resulted in an increase in quantum yield to O.SO. 

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