ABSTRACT
Gas Permeation ..............................................................................438 12.4 Future Challenges ......................................................................................442 12.5 Conclusions .................................................................................................443 12.6 Questions on Basic Issues .........................................................................444 Acknowledgments ..............................................................................................444 References .............................................................................................................444
cell membranes, and dye-sensitized solar cells (DSSCs) is discussed. In novel functionalmaterials,oftenanoverlapoftransportduetoaconcentration and/orapotentialgradienttakesplace.Thetransportparametersmeasured inmaterialevaluationsuchasimpedancespectroscopycanre“ectaphysicalsituation,whichisdifferentfromthatoftheworkingdevice.Adetailed fundamental knowledge of various factors is necessary to fully understand thenatureoftransportasabasistooptimizethecorrespondingfunctional materials.
