End Group Modified PEG-based ABA Triblock Copolymers Well-controlled by Reversible Addition-fragmentation Chain Transfer Polymerization for High Performance and Stable Quasi-Solid-State Dye-Sensitized Solar Cells
발표자
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초록
내용
To get highly efficient quasi-solid-state dye-sensitized solar cells (QSS-DSSCs) using polymer gel electrolytes (PGEs), well-defined ABA triblock copolymers ([Poly(methyl methacrylate)]2-block-poly(ethylene glycol)) with different end functionality and components of I-/I3- liquid electrolytes (LEs) are studied and optimized for the fabrication of PGE-based QSS-DSSCs. Due to the high reactivity and toxicity of sulfur-containing trithiocarbonate end groups, ABA triblock copolymers prepared from RAFT polymerization are modified to sulfur-free various end functional triblock copolymers by radical-induced exchange reactions. After optimization, the highest power conversion efficiency (PCE) for QSS-DSSCs achieved under simulated 1-sun illumination is up to 10.34%, which is comparable with the highest PCE of 10.39% for LE-DSSCs. Carboxylic acid end functional triblock copolymer can be a promising candidate as a sulfur-free polymeric matrix for gel electrolytes of QSS-DSSCs.