کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1265242 972204 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic field release of trapped charges in poly(fluorenylenevinylene)s
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Magnetic field release of trapped charges in poly(fluorenylenevinylene)s
چکیده انگلیسی

We have measured the effect of an applied magnetic field on the current through thin films of two different organic conjugated polymers that have previously shown to exhibit magnetoresistance, poly(9,9-dioctyl-1,4-fluorenylenevinylene) and poly(9,9-dioctyl-2,7-fluorenylenevinylene). The results show that the magnetic field releases trapped charges from inside the material and enhances the current. We have also performed optical absorption experiments on these polymer films under applied voltage and magnetic field. The results show that the magnetic field produces a change in the optical absorption in the low-energy range associated with deep traps and only under conditions when these traps are likely charged. These two results provide a strong case for the release of trapped charges caused by the magnetic field as being the cause of the magnetoresistance in these polymers and possibly in other organic materials where magnetoresistance was recently observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Electronics - Volume 8, Issue 6, December 2007, Pages 695–701
نویسندگان
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