| 초록 |
Catalytic activity of conductive polymer counter electrode (CE) and its interfacial compatibility with solid polymer electrolyte (SPE) are the core techniques for the high efficient solid-state dye-sensitized solar cells (ssDSCs). Herein, a ionic liquid, 1,3-dimethylimidazolium iodide (DMII) is manipulated by a new dopant for the nanofibrous poly(3,4-ethylenedioxythiophene) (PEDOT NF) CE in ssDSCs. The new dopant DMII may replace to a large extent the sodium dodecyl sulfate (SDS) initially doped during the formation of PEDOT NFs, since DMI+ may spread out the active doping sites of PEDOT NFs by mitigating the electrostatic interactions between PEDOT and SDS. Therefore the dopant concentration of I- for DMII-doped PEDOT NF is higher than that for the neat and even lithium iodide (LiI) in PEDOT NFs. As results, the DSC with DMII-PEDOT NF achieves 8.52% energy conversion efficiency (ECE), greater than the Pt CE (8.25%) which is the highest ECE of ssDSCs with a conductive polymer CEs. |
