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