کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1441223 | 1509396 | 2013 | 7 صفحه PDF | دانلود رایگان |
• Four julolidine dyes with different acceptors and thiophene-conjugation bridge are synthesized.
• The Jsc and efficiency are increased significantly by introducing a thiophene unit.
• J3 with cyanoacetic acid gives the best photoelectric conversion efficiency of 1.52%.
Four novel donor-π conjugated bridge-acceptor (D-π-A) metal-free organic dyes (J1, J2, J3 and J4) with a julolidine moiety as the electron donor for dye-sensitized solar cells (DSSCs) are synthesized. Their absorption spectra, electrochemical and photovoltaic properties were extensively investigated. Transient absorption spectra measurements show that insertion of one thiophene unit and replacing rhodanine-3-acetic acid by cyanoacetic acid can increase the dye regeneration process. Among these dyes, J3 gives the best photoelectric conversion efficiency of 1.52% with Jsc = 7.53 mA cm–2, Voc = 353 mV, FF = 0.57. Compared with those of J1, the Jsc and the conversion efficiency of solar cell based on J3 are significantly increased by the insertion of a thiophene unit.
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Journal: Synthetic Metals - Volume 180, 15 September 2013, Pages 9–15