کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1443235 1509458 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electron transport and electroluminescent efficiency of conjugated polymers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Electron transport and electroluminescent efficiency of conjugated polymers
چکیده انگلیسی

The relation between charge balance and electroluminescent efficiency for polymers is studied systematically in this work. Light-emitting diodes of several kinds of polymers with very different efficiency are compared. The electron and hole currents are measured in the uni-polar devices and fitted by the theoretical model to get carrier mobilities. The universal features of the high efficiency polymers are that the electron and hole mobilities are comparable and the electron current is larger than the hole current due to the higher hole barriers. The electron current is more crucial than hole current to determine the efficiency in the bipolar light-emitting diode. The purity of polymers and low electron injection barriers both play significant roles in producing stronger electron currents. These results give the physical rules for designing new polymers and the device structures to achieve highly electroluminescent devices.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 159, Issues 1–2, January 2009, Pages 137–141
نویسندگان
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