کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
79007 49346 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
RGB organic electrochromic cells
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
RGB organic electrochromic cells
چکیده انگلیسی

In this work we present three novel viologen-type electrochromic compounds, which turn into red, green and blue (RGB) upon electrochemical reduction on porous titania surface. The synthesis of the three compounds involved attaching benzyl group with phosphonic acid residue as an anchor to 4,4′-bipyridine, 3,3′-dimethyl-4,4′-bipyridine and 4,4′,4″,4′″-thieno-2,3,4,5-tetrayltetrapyridine. The sterically demanding benzyl groups help to decrease the strong propensity of the colored radical cations to aggregation. The electrochromic derivatives were adsorbed on the surface of porous titania layers prepared by electrophoretic deposition onto a fluorine-doped tin oxide (FTO) glass followed by mechanical compression. Finally the electrodes with the grafted electrochromic derivatives were glued to a second FTO glass to form a closed cell, which operates with two electrodes. The electrochromic windows exhibited high contrast, fast response and low current consumption (∼1 mA) when relatively low voltage (∼5 V) was applied.

Figure optionsDownload as PowerPoint slideHighlights
► Viologen-type electrochromes involving a benzylphosphonic acid anchoring group.
► Porous titania electrodes.
► Three sealed electrochromic windows affording red, green and blue colors at potentials between −5 and −10 V.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 99, April 2012, Pages 123–128
نویسندگان
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