@article{b5d83627409a453d8a0a5cb9e3b8b3b3,
title = "Molecular engineering of starburst triarylamine donor with selenophene containing π-linker for dye-sensitized solar cells",
abstract = "A series of new D-π-A organic photosensitizers 7a-7d featuring a novel starburst electron donor unit and uncommon selenophene containing π-linker were synthesized, characterized, and applied for fabrication of dye-sensitized solar cells (DSSCs). Dyes 11d-13d with thiophene or phenyl ring as the π-linker also were synthesized for comparison. The best power conversion efficiency (PCE) of 6.67% was attained for 11d with a relatively high open-circuit voltage (Voc) of 0.825 V using conventional I-/I3- redox electrolyte in DSSCs, and this value reaches about 84% of the device based on standard dye N719 (7.91%) under the same device fabrication conditions. Electrochemical impedance spectroscopy (EIS) and open-circuit voltage decay (OCVD) were applied to verify the findings. All the results suggest that starburst electron donor design strategy can be used to minimize dye aggregation on TiO2 and to slow down the charge recombination kinetics in DSSCs to improve the photovoltaic performance. Effects of using selenophene as the π-linker building block on the photovoltaic parameters also were explored and evaluated.",
author = "Ho, {Po Yu} and Siu, {Chi Ho} and Yu, {Wai Hong} and Panwang Zhou and Tao Chen and HO, {Cheuk Lam} and Lee, {Lawrence Tien Lin} and Feng, {Ying Hsuan} and Jianyong Liu and Keli Han and Lo, {Yih Hsing} and WONG, {Wai Yeung}",
note = "Funding Information: P.-Y. Ho and C.-H. Siu contributed equally to this work. We are grateful for the financial support from the Areas of Excellence Scheme, University Grants Committee of HKSAR (Project No. AoE/P-03/08), Hong Kong Research Grants Council (HKBU203011), Hong Kong Baptist University (FRG2/13-14/083 and FRG2/13-14/ 078) and the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20120829154440583 and JCYJ20140818163041143). The work was also supported by Partner State Key Laboratory of Environmental and Biological Analysis (SKLP-14-15-P011) and Strategic Development Fund of HKBU. K. L. Han thanks the National Basic Research Program of China (2013CB834604) and NSFC (21533010). T. Chen thanks the RGC Theme-based Research Scheme (Project No. T23-407/ 13-N) for the financial support. Y. H. Lo gratefully acknowledges the financial support from the National Science Council of Taiwan (NSC 102-2113-M-845-001) and the project of the specific research fields in the University of Taipei, Taiwan.",
year = "2015",
month = dec,
day = "3",
doi = "10.1039/c5tc03308j",
language = "English",
volume = "4",
pages = "713--726",
journal = "Journal of Materials Chemistry C",
issn = "2050-7526",
publisher = "Royal Society of Chemistry",
number = "4",
}
