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Molecular engineering of thia-bridged triphenylamine heterohelicenes as novel organic dyes for dye-sensitized solar cells
- Authors
- Kim, Chulwoo; Choi, Hyunbong; Paek, Sanghyun; Kim, Jeum-Jong; Song, Kihyung; Kang, Moon-Sung; Ko, Jaejung
- Issue Date
- 1-12월-2011
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Thia-bridged heterohelicene; Organic dye; Dye-sensitized solar cell; DSSCs
- Citation
- JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v.225, no.1, pp.17 - 25
- Indexed
- SCIE
SCOPUS
- Volume
- 225
- Number
- 1
- Start Page
- 17
- End Page
- 25
- ISSN
- 1010-6030
- Abstract
- Three organic sensitizers incorporating thia-bridged heterohelicene unit, thiophene-conjugate bridge, and cyanoacrylic acid were synthesized. The power conversion efficiency was quite sensitive to the substituents on heterohelicene donor group. Under standard global AM 1.5 solar conditions. the JK-206-sensitized cell gave a short-circuit photocurrent density (J(SC)) of 13.44 mA cm(-2), an open-circuit voltage (V-OC) of 0.71 V. and a fill factor of 0.74, corresponding to an overall conversion efficiency of 7.08%. The device based on the JK-206 with an ionic liquid electrolyte showed an excellent long-term stability. The initial efficiency of 5.6% for JK-206 slightly decreased to only 5.4% after the 1000 h light soaking at 60 degrees C. (C) 2011 Elsevier B.V. All rights reserved.
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