Array of solid-state dye-sensitized solar cells with micropatterned TiO2 nanoparticles for a high-voltage power source
1 School of Electrical Engineering, Seoul National University, Kwanak, PO Box 34, Seoul 151-600, South Korea
2 School of Global Convergence Studies, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon 305-719, South Korea
Nanoscale Research Letters 2013, 8:491 doi:10.1186/1556-276X-8-491Published: 20 November 2013
We demonstrate an array of solid-state dye-sensitized solar cells (SS-DSSCs) for a high-voltage power source based on micropatterned titanium dioxide nanoparticles (TNPs) as photoanodes connected in series. The underlying concept of patterning the TNP of a few micrometers thick lies on the combination of the lift-off process of transfer-printed patterns of a sacrificial layer and the soft-cure treatment of the TNP for fixation. This sacrificial layer approach allows for high pattern fidelity and stability, and it enables to construct stable, micrometer-thick, and contamination-free TNP patterns for developing the SS-DSSC array for miniature high-voltage applications. The array of 20 SS-DSSCs integrated in series is found to show a voltage output of around 7 V.