کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5150072 | 1497899 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Studies on D-A-Ï-A structured porphyrin sensitizers with different additional electron-withdrawing unit
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The introduction of an additional acceptor to a typical donor-Ï bridge-acceptor (D-Ï-A) type porphyrin sensitizer results in a D-A-Ï-A featured porphyrin. Two porphyrins containing an additional acceptor with different electron-withdrawing abilities such as 2,3-diphenylquinoxaline (DPQ) for LP-11 and 2,1,3-benzothiadiazole (BTD) for LP-12 between the porphyrin core and the anchoring group have been synthesized for use as sensitizers in dye-sensitized solar cells (DSCs). Compared to LP-11, LP-12 with the stronger electron-withdrawing additional acceptor BTD possesses better light harvesting properties with regard to red-shifted Q-band absorption and a broader IPCE spectrum, resulting in a greater short circuit photocurrent density (Jsc) output. Interestingly, the steric hindrance of the DPQ group is favorable for suppressing dye aggregation, leading to a larger open-circuit voltage (Voc) value for LP-11-based cell. However, the loss in Voc of LP-12 is overcompensated by an improvement in Jsc. The optimized cell based on LP-12 achieves the better performance with a Jsc of 15.51Â mAÂ cmâ2, a Voc of 674Â mV, a fill factor (FF) of 0.7 and an overall power conversion efficiency (PCE) of 7.37% under standard AM 1.5Â G irradiation. The findings provide a guidance for the future molecular design of highly efficient porphyrin sensitizers for use in DSCs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 333, 30 November 2016, Pages 1-9
Journal: Journal of Power Sources - Volume 333, 30 November 2016, Pages 1-9
نویسندگان
Futai Lu, Xuexiang Wang, Yanming Zhao, Guang Yang, Jie Zhang, Bao Zhang, Yaqing Feng,