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Novel organic sensitizers containing a bulky spirobifluorene unit for solar cell
- Authors
- Cho, Nara; Choi, Hyunbong; Kim, Duckhyun; Song, Kihyung; Kang, Moon-sung; Kang, Sang Ook; Ko, Jaejung
- Issue Date
- 1-8월-2009
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- TETRAHEDRON, v.65, no.31, pp.6236 - 6243
- Indexed
- SCIE
SCOPUS
- Journal Title
- TETRAHEDRON
- Volume
- 65
- Number
- 31
- Start Page
- 6236
- End Page
- 6243
- ISSN
- 0040-4020
- Abstract
- Three organic sensitizers JK-87, JK-88, and JK-89 containing a bulky spirobifluorene unit in the bridged group are designed and synthesized. Under standard global A.M. 1.5 solar condition, the JK-89 sensitized cell gave a short-circuit photocurrent density (J(sc)) of 13.02 mA cm(-2), an open-circuit voltage (V-oc) of 0.75 V, and a fill factor of 0.70, corresponding to an overall conversion efficiency 77 of 6.83%. The eta of JK-89 is higher than those of other two cells due to the larger J(sc). The improved J(sc) value is mainly attributed to the broad and red-shifted absorption band. (C) 2009 Elsevier Ltd. All rights reserved.
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