Novel conjugated polymers employing the binding of polyfluorene derivatives and C-60

作者：Jin Youngeup; Jee Jaesung; Kim Heejoo; Song Suhee; Park Sung Heum; Kim Jaehong; Kang Shin Won; Woo Han Young; Lee Kwanghee; Suh Hongsuk^*

来源：Synthetic Metals, 2009, 159(15-16): 1529-1537.

DOI：10.1016/j.synthmet.2009.04.016

• Photovoltaic effect
• Pendant fullerene
• Polyfluorene

New polyfluorene(PF)-based conjugated polymers, PCIBEHF, PCIBEHF-co-PDEHF. PN3BEHF, PN3BEHF-co-PDEHF, PEHPBF, PC60BEHF, PC60BEHF-co-PDEHF. and PEHPBF( )PCBA(-) containing chloro, azido, piperidine, and fullerene (C-60) groups as pendants, were synthesized. In the case of PC60BEHF and PC60BEHF-co-PDEHF, the C-60 moiety was introduced by using covalent bond formation between the azido group and C-60. PEHPBF( )PCBA(-) was synthesized by using ionic bond formation between the piperidinium cation of PEHPBF and carboxylate anion of PCBA. The PL and EL spectra of PCIBEHF, PCIBEHF-co-PDEHF, PN3BEHF, PN3BEHF-co-PDEHF, and PEHPBF exhibited red-shifted and broad peaks caused by the aggregation which was induced by the increasing interchain interaction due to the polar pendants. After binding with C-60, covalently and ionically, the photovoltaic properties of PC60BEHF, PC60BEHF-co-PDEHF, and PEHPBF( )PCBA(-) were studied. PL was quenched completely, which indicates photo-induced charge transfer from PF to pendant C-60. Even though photovoltaic effects did not occur in short circuit condition, blending with MEH-PPV as the ratio of 1:1 generated the photovoltaic effects.

• 出版日期2009-8