Photovoltaic properties of polyacetylene derivative for quasi-solid state dye-sensitized solar cell applications

ABSTRACT

In this study, we introduce polyacetylene-based polyelectrolyte for quasi-solid-state dye sensitized solar cells (DSSCs) applications. A conjugated polyelectrolyte was prepared via the phosphorus oxychloride-activated polymerization of 2-ethynylpyridine. Poly[2-ethynyl-N-(dichlorophosphino)pyridinium chloride] was applied for DSSCs. The photoluminescence (PL) spectrum of polymer solution showed the two maximum peaks of 471 nm and 489 nm corresponding to the photon energy of 2.64 eV and 2.54 eV, respectively. Quasi-solid-state DSSCs with a SnO₂:F/TiO₂/D719 dye/solid-state electrolyte/Pt device was fabricated with Poly[2-ethynyl-N-(dichlorophosphino)pyridinium chloride], which shows the maximum power conversion efficiency (PCE) of 5.70%.

KEYWORDS:

• 2-ethynylpyridine
• conjugated polymer
• phosphorus oxychloride
• photoluminescence
• quasi-solid-state DSSC

Funding

This work was supported by the Pioneer Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (MSIP) of Korea (NRF-2013M3C1A3065522). This work was also supported by the National Research Foundation of Korea (NRF-2017R1D1A3B03032891).