A comparison of the electronic and photovoltaic properties of novel twin-anchoring organic dyes containing varying lengths of pi-bridges in dye-sensitized solar cells

作者：Jo Hyo Jeong; Nam Jung Eun; Kim Dae Hwan; Kim Hyojeong; Kang Jin Kyu^*

来源：Dyes and Pigments, 2014, 102: 285-292.

DOI：10.1016/j.dyepig.2013.10.032

• Dye-sensitized solar cell
• Organic dyes
• Phenothiazine dyes
• Photovoltaic performance
• pi-Conjugated system

Two novel donor acceptor pi-conjugated (D-pi-A) organic dyes have been engineered as sensitizers for applications in dye-sensitized solar cells. The derivatives of phenothiazine containing different numbers of thiophene units in the chromophore were synthesized to investigate the correlation between the number of pi-bridge photovoltaic properties,as photosensitizers for dye-sensitized solar cells. The organic dye with dithiophene units exhibited a higher molar extinction coefficient and more efficient electron injection from the dye to TiO2 conduction band leading to an improved light harvesting efficiency. The solar-to-electricity conversion efficiency of 7.3% in the case of the bis(dithienyl) bridged dye with an open-circuit voltage of 0.636 V and short-circuit photocurrent density of 18.692 m A cm(-2), deriving from a higher absorption with respect to the mono (2,5-thienyl) containing dye, as conformed by incident photo-to-current conversion efficiency measurements.

• 出版日期2014-3