The invention relates to polymers comprising fused selenophene rings, to {HEAD ~ 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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The invention relates to polymers comprising fused selenophene rings , to { HEAD ~ 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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