Fullerene and its derivatives have become materials of great technological interest due to their growing success as electron acceptors in organic photovoltaic cells (OPVs). However despite their success, little is known about the structure and dynamics of fullerene derivatives even though it has been shown in numerous studies that their structure is crucial to determining the domain morphology and resultant device efficiencies. Crucially in many cases the fullerene domains are seen to adopt an amorphous phase and thus it is essential we first understand the basic amorphous structure of PCBM. Following a successful investigation on OSIRIS on pure PCBM , this proposal seeks to extend our study by taking advantage of NIMROD's long length scale capabilities to acquire what we believe to be the first fully quantitative structural description of PCBM in the liquid and amorphous states.