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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 28, Number 11
BKCSDE 28(11)
November 20, 2007 

Synthesis of Novel Organic Dyes Containing Coumarin Moiety for Solar Cell
Hyunbong Choi, Chul Baik, Hyun Jun Kim, Jeum-Jong Kim, Kihyung Song, Sang Ook Kang*, Jaejung Ko*
Fluorenyl, Coumarin, Organic dyes, Solar cell
Novel organic dyes, JK-34, JK-35 and JK-36 containing bis-dimethylfluorenyl amino coumarin unit are designed and synthesized. Nanocrystalline TiO2 dye-sensitized solar cells were fabricated using these dyes. Under standard global AM 1.5 solar condition, the JK-34 sensitized cell gave a short circuit photocurrent density of 10.05 mA cm?2, open circuit voltage of 0.65 V, and a fill factor of 0.68, corresponding to an overall conversion efficiency η of 4.54%. We found that the power conversion efficiency was shown to be quite sensitive to the structural modifications of bridging thiophene moiety.
1973 - 1979
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