Journal
DYES AND PIGMENTS
Volume 162, Issue -, Pages 905-915Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2018.11.010
Keywords
Dye-sensitized solar cells; Phenoxazine; pi-conjugation; Aggregation; Dye adsorption; Charge recombination
Funding
- National Research Foundation of Korea(NRF) - Korea government [2016R1C1B2006941]
- National Research Foundation of Korea [2016R1C1B2006941] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Phenoxazine dyes with a hexyloxy chain and furan moiety were synthesized and used in dye-sensitized solar cells. The dyes were designed to investigate the effects of these substituents on the photophysical and electrochemical properties of the dyes and on cell photovoltaic performance. The introduced hexyloxy moiety, as an additional donor, improved the short-circuit current and open-circuit voltage of the cell by increasing light absorption and stark hindrance, respectively. The furan moiety introduced in the phenoxazine dye as a bridge unit led to a bathochromic shift of the absorption band and a large amount of dye adsorption, increasing the short-circuit current of the cell. Among the synthesized dyes, those with the furan moiety showed the best conversion efficiency of 6.34%.
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