کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1443650 1509477 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the use of cyanine dyes as low-bandgap materials in bulk heterojunction photovoltaic devices
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
On the use of cyanine dyes as low-bandgap materials in bulk heterojunction photovoltaic devices
چکیده انگلیسی

Cyanine dyes with absorption edges of almost 1000 nm were used in combination with MEH-PPV for the fabrication of organic solar cells. For blended thin films, a pronounced phase separation between the two components occurred and resulted in photocurrents with different signs for bilayer and bulk heterojunction devices. Absorption spectra and selective dissolution experiments were used to illustrate the process of vertical phase segregation, with the preferential wetting of the polar anode by the cyanines while maintaining percolating carrier pathways between the electrodes. For a cyanine with long alkyl side chains, the compatibility with the polymer matrix was increased and the development of the effective inverted bilayer configuration was not observed. The generally low oxidative photocurrents were explained with unfavourable shifts of the highest occupied molecular orbital (HOMO) dye energy levels in the solid state.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 156, Issues 14–15, 1 July 2006, Pages 973–978
نویسندگان
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