[2PS-014]
Synthesis and Characterization of Fluorinated Phenazine-Based Conjugated Polymers for Polymer Solar Cell Applications
발표자이재훈 (국립부경대학교)
연구책임자진영읍 (국립부경대학교)
Abstract
Fluorinated phenazine-based conjugated polymers were synthesized as donor–acceptor materials for polymer solar cells. Four polymers were prepared: PBDT-DT-DoDFPz and PBDTT-DT-DoDFPz with linear alkyl side chains, and PBDT-DT-DHDFPz and PBDTT-DT-DHDFPz with branched side chains. BDTT-containing polymers exhibited deeper HOMO levels than their BDT analogues, while branched phenazine units further lowered HOMO levels, contributing to higher open-circuit voltages. AFM imaging showed that linear side chain polymers formed finer domains when processed with DCB, whereas branched side chain polymers achieved improved morphology with a 3% DIO additive. Optimized devices achieved a J_sc of 9.36 mA cm⁻², a V_oc of 0.66 V, and a fill factor of 0.55, leading to a maximum power conversion efficiency of 3.41%. These results highlight how side chain structure and phenazine design significantly influence electronic properties and device performance in polymer solar cells.