@article{90195645c59544abbcdaaf0f07e824e7,
title = "Fluorene-bridged organic dyes with di-anchoring groups for efficient co-adsorbent-free dye-sensitized solar cells",
abstract = "A series of new fluorene-bridged organic dyes with di-anchoring groups have been synthesized and well characterized. Such a molecular design strategy using two organic anchors inhibits the undesirable charge recombination and prolongs the electron lifetime which results in significant enhancement of the power conversion efficiency (η). These findings were supported by the results from electrochemical impedance spectroscopy (EIS) and open-circuit voltage decay (OCVD). Under standard AM 1.5 irradiation (100 mW cm-2), the best dye-sensitized solar cell (DSSC) exhibits a high η of 6.11% without the need for co-adsorbent addition. An open-circuit photovoltage (Voc) of 0.753 V, a short-circuit photocurrent density (Jsc) of 11.20 mA cm-2 and a fill factor (ff) of 0.725 were measured in such co-adsorbent-free cells. The high Voc value is mainly attributed to the improved electron lifetime (τn) and high resistance to the recombination of electrons (Rrec) of 422.38 Ω.",
author = "Siu, {Chi Ho} and {Lin Lee}, {Lawrence Tien} and Ho, {Po Yu} and Poulomi Majumdar and Ho, {Cheuk Lam} and Tao Chen and Jianzhang Zhao and Hua Li and Wong, {Wai Yeung}",
note = "W. -Y.W. thanks the National Basic Research Program of China (973 Program) (2013CB834702), the National Natural Science Foundation of China (project number 91222201), the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20120829154440583), Hong Kong Baptist University (FRG2/12-13/083 and FRG1/12-13/046), Hong Kong Research Grants Council (HKBU203011), Areas of Excellence Scheme, the University Grants Committee of HKSAR, China (project no. AoE/P-03/08) and the Dalian University of Technology (Haitian Scholarship). The work was also supported by the Partner State Key Laboratory of Environmental and Biological Analysis and the Strategic Development Fund of HKBU. H. Li thanks the 111 Project and Beijing Engineering Research Center of Food Environment and Public Health from the Minzu University of China (No. B08044 and No. 10301-01404026) for financial support.",
year = "2014",
month = sep,
day = "14",
doi = "10.1039/c4tc00661e",
language = "English",
volume = "2",
pages = "7086--7095",
journal = "Journal of Materials Chemistry C",
issn = "2050-7526",
publisher = "Royal Society of Chemistry",
number = "34",
}