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Two new D‐π‐A copolymers combining dithieno[3,2‐b:2′,3′‐d]silole as donor unit and thieno[3,4‐c]pyrrole‐4,6‐dione as acceptor unit are designed and synthesized. The influence of different side chains on the optical properties, the energy levels of the highest occupied molecular orbitals and lowest unoccupied molecular orbitals, electronic structures, morphologies of blend films, and the photovoltaic...
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