%0 Journal Article %A Tregnago G. %A Wykes M. %A PaternĂ² G.M. %A Beljonne D. %A Cacialli F. %T Low-temperature photoluminescence spectroscopy of solvent-free PCBM single-crystals %D 2015 %U http://hdl.handle.net/20.500.12614/1119 %~