ABSTRACT
A fundamental understanding of the physical processes, which contribute to efficient mobile carrier generation and transport in organic solar cells, remains under debate. We explore the role that spectroscopic and electrical techniques have played in understanding the processes relevant to photogeneration of charge carriers and the interplay between recombination and collection of photogenerated charge carriers. An inexhaustive survey of the way in which sets of measurement techniques complement each other or have presented conflicting sets of data on the same materials systems, and continue to shape popular perception of photovoltaic current generation in bulk heterojunction (BHJ) systems is presented.
