Front Cover: Bridgehead imine-substituted cyclopentadithiophene structural units, in combination with strong acceptors with progressively delocalized π-systems, afford modular donor-acceptor copolymers with broad and long wavelength light absorption in the infrared. These solution-processable materials possess some of the narrowest bandgaps reported to date and elucidate important aspects of the role of chemical structure in controlling the primary photoexcitations in conjugated copolymer systems. Further details can be found in the article by M. E. Foster, B. A. Zhang, D. Murtagh, Y. Liu, M. Y. Sfeir, B. M. Wong, and J. D. Azoulay* on page 1516.