کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9837612 | 1525281 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impedance spectroscopy study on transport properties of N,Nâ²-diphenyl-N,Nâ²-bis(1-naphthyl)-1,1â²-biphenyl-4,4â²-diamine
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The transport properties of N,Nâ²-diphenyl-N,Nâ²-bis(1-naphthyl)-1,1â²-biphenhyl-4,4â²-diamine (NPB) have been investigated by using impedance spectroscopy (IS) and J-V measurements based on a single-layer structure of ITO/NPB/Al. The J-V characteristic of the device obeys Ohmic law below 0.6Â V, and is in the space-charge limited current (SCLC) regime above 0.6Â V. The density of the thermally generated charge carrier is determined to be about 3.1Ã1016Â cmâ3. Impedance spectroscopy measurements showed that the device can be simulated by an equivalent parallel RC network with a contact resistance RS in series, in which the bulk capacitance C of NPB remains unchanged while the resistance R decreases along with bias voltage. The variation of the whole conductance and capacitance of the device with frequency and bias can be understood by the carrier response and the transit time dependence on the bias in the NPB film.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 362, Issues 1â4, 15 May 2005, Pages 35-40
Journal: Physica B: Condensed Matter - Volume 362, Issues 1â4, 15 May 2005, Pages 35-40
نویسندگان
Y.F. Xu, Y.S. Tao, H.J. Zhang, X.Z. Chen, G.H. Cao, Z.A. Xu, H.Y. Li, S.N. Bao, P. He,