کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6599372 1423885 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of brominated-TPA-stilbazole based ancillary ligand on the photocurrent and photovoltage in dye-sensitized solar cells
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Influence of brominated-TPA-stilbazole based ancillary ligand on the photocurrent and photovoltage in dye-sensitized solar cells
چکیده انگلیسی
Two novel heteroleptic brominated-TPA-stilbazole based Ru (II)-sensitizers denoted as SD-11 and SD-11 mono were designed, synthesized and characterized for dye-sensitized solar cells (DSCs) in comparison to benchmarked dye N719. The molecular structures of SD-11 and SD-11 mono were confirmed using FTIR, 1H-NMR and mass spectrometry. The aim was to systematically study the effect of mono (SD-11 mono) versus bis-brominated-TPA moiety (SD-11) on molar absorptivity, ground and excited state oxidation potentials, light harvesting efficiency (LHE), incident-photon-to-current conversion efficiency (IPCE), short-circuit photocurrent density (Jsc), and total solar-to-electric conversion efficiency (η) for DSCs. Optical results revealed that SD-11 and SD-11 mono have higher molar extinction coefficients, narrower HOMO−LUMO gaps compared to N719. Hence, it was found that SD-11 exhibited remarkably greater Jsc than SD-11 mono and interestingly showed comparable extinction coefficients. However, in optimized conditions, SD-11 showed a higher Jsc of 22.1 mA cm−2, Voc of 0.68 V with (% η) of 8.7 compared to Jsc of 14.4 mA cm−2, Voc of 0.63 V and with (% η) of 5.8 for SD-11 mono whereas N719 attained a Jsc of 15.9 mA cm−2, Voc of 0.74 V with (% η) of 7.6 under the same experimental device conditions. It was concluded that SD-11 outperformed SD-11 mono in photovoltaic performance when anchored on TiO2, owing to better light-harvesting ability. These results clearly demonstrated that the enhancement of the photovoltaic performance in SD-11 can be attributed to the presence of more number of -Br group.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 150, March 2018, Pages 347-353
نویسندگان
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