Conductive polymer and its modification as counter electrode in dye-sensitized solar cells: a brief review
摘要
Conductive polymer as counter electrode (CE) in dye-sensitized solar cells (DSSCs) has gained significant attention to replace platinum-standard CE. The performance of the device using conductive polymer is comparable with the platinum-standard device. Conductive polymers such as poly(3,4-ethylenedioxythiophene) (PEDOT), polyaniline (PANI), polypyrrole (PPy) and poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) offer several advantages as CE materials in DSSCs. The efficiency of the device can be further increased by improving the electrical properties of conductive polymers. The unique scope and original contribution of this review are the use the conductive polymers such as PEDOT, PANI, PPy and PEDOT: PSS CEs and its modification via composite and doping. The relationship between the power conversion efficiency (ƞ) and charge transfer resistance (Rct) of the devices using these polymers and their modified structure are discussed. The performance stability and the flexibility of the device using conductive polymer CE are also highlighted. The review is completed with the challenge and future prospect of DSSC using conductive polymer and its modification as CE.