Dispersion Controlled Platinum/Multi-Walled Carbon Nanotube Hybrid for Counter Electrodes of Dye-Sensitized Solar Cells

다국어 초록 (Multilingual Abstract)

Platinum (Pt) nanoparticles are incorporated in dispersion controlled multi-walled carbon nanotubes(CNTs) for counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). The dispersion of CNTs is controlled bya styrenic block copolymer as a surface modifier, facilitating the fabrication of the CE on F-doped SnO glass (FTOglass) by a screen printing method. By employing sufficiently large amounts of CNTs in a paste and using a stepwisethermal treatment procedure in which organic compounds are successfully removed from the paste while minimisingdamage to the CNTs, a conductive and uniform CNT coating can be screen-printed onto FTO glass. Pt precursorsin the pastes transform to discrete Pt nanoparticles under the thermal treatment conditions, thereby successfully producinga Pt/CNT composite. Incorporation of the small amount of Pt nanoparticles into the CNTs results in significantimprovements in the performances of the DSSCs. The DSSC with the Pt/CNT CE also exhibits very stablesolar-to-electricity energy conversion efficiency (η) values for extended light soaking times that are superior to thoseof DSSC with the standard Pt CE. The results demonstrate the successful combination of DSSC processability, performanceand stability enabled by employing Pt/CNT hybrid CEs.

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