{HEAD ~ The invention} relates to polymers comprising fused selenophene rings, to their use as {TAIL ~ semiconductors} or charge transport materials in optical, electrooptical or electronic devices, and to optical, electrooptical or electronic devices comprising them 
{ HEAD ~ The invention } relates to polymers comprising fused selenophene rings , to their use as { TAIL ~ semiconductors } or charge transport materials in optical , electrooptical or electronic devices , and to optical , electrooptical or electronic devices comprising them
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