Journal Article 5 side-chain engineering BHJ morphology 1 Research Support, Non-U.S. Gov't 1 Research Support, U.S. Gov't, Non-P.H.S. 1 alkyl-substituted fluorothiophene side chains 1 all-polymer solar cell 1 mehr ... all-polymer solar cells 1 all-small-molecule organic solar cells 1 anion transport 1 conjugated D-A copolymer donors 1 covalent organic framework membranes 1 de novo design 1 difluoroquinoxaline A-unit 1 high efficiency 1 interpenetrating networks 1 low energy loss 1 phase separation 1 phase-transfer polymerization 1 polymer crystallinity 1 resonant soft X-ray scattering (RSoXS) 1 small molecule donor materials 1 thermal annealing 1 weniger ...