کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6600358 458925 2015 40 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of the anchoring group in the performance of carbazole-phenothiazine dyads for dye-sensitized solar cells
ترجمه فارسی عنوان
تأثیر گروه لنگر در عملکرد دیوارهای کربازول-فنوتیازین برای سلول های خورشیدی حساسیت به رنگ
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
A combined experimental and theoretical study is carried out on two novel carbazole-phenothiazine dyadic dyes bearing the simple carboxylic acid and the more rarely investigated malonic acid as anchoring group. An improvement of the photovoltaic performances is observed when the malonic acid is employed in place of the carboxylic acid, even if the highest efficiencies for this family of organic dyes were recorded with the use of the cyanoacrylic and rhodanine-3-aceti acid as anchoring units. The low photocurrents measured in the case of the carboxylic anchoring are rationalized on the basis of the computational modelling of the isolated dye in solution as well as the investigation of the electronic structure of extended dye-sensitized TiO2 models. The theoretical calculations suggest that the low short current densities might arise from the unfavourable interplay of the dye's optical properties (blue shift of the absorption spectrum) and of the energy alignment between the dye's LUMO and the semiconductor conduction band edge, possibly causing an inefficient electron injection process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 113, February 2015, Pages 536-545
نویسندگان
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