Effects of selenium substitution on optical, electrochemical, and photovoltaic properties of oxindole-based π-conjugated polymers
2018; Elsevier BV; Volume: 64; Linguagem: Inglês
10.1016/j.orgel.2018.10.021
ISSN1878-5530
AutoresDong Zhao, Jiawei Zheng, Zheng Gong, Jingshen Wu, Jianxin Tang, Qing Zhang,
Tópico(s)Synthesis and Properties of Aromatic Compounds
ResumoTwo oxindole based π-conjugated polymers with same structures except the positions of selenium atoms in the main chains have been synthesized. The effects of heavy atom substitution on optical, electrochemical, and photovoltaic properties have been investigated. The polymer solar cell devices based on the new polymers as electron donors also have been studied. The oxindole based polymers showed intramolecular non-bonded interactions between divalent sulfur/selenium and carbonyl oxygen. The selenophene based polymers showed narrow optical band gaps. However, the introduction of selenophene led to the decline of optical absorption in both the monomer and the polymers compared with the thiophene based counterparts. The diminution of absorption in selenium containing polymers can have adverse effect on solar photon harvesting.
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