Polymer-Fullerene Miscibility: A Metric for Screening New Materials for High-Performance Organic Solar Cells - Treat,ND; Varotto,A; Takacs,CJ; Batara,N; Al-Hashimi,M; Heeney,MJ; Heeger,AJ; Wudl,F; Hawker,CJ; Chabinyc,ML (JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012)