کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1547424 | 997635 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrically driven luminescence of nanocrystalline Si/SiO2 multilayers on various substrates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Amorphous-Si:H/SiO2 multilayers were fabricated on various substrates by alternatively changing the ultra-thin amorphous Si films deposition and in situ plasma oxidation processes. Uniform silicon nanodots with controllable size were formed by combining the rapid thermal annealing and furnace annealing techniques as revealed by cross-sectional transmission electron microscopy. Light-emitting diodes based on Al/(nc-Si/SiO2) multilayers/Si substrate/Al structures were fabricated and electrically driven luminescence was demonstrated at room temperature. It was found that the substrate had a significant impact on the carrier injection efficiency and the luminescence intensity. The turn-on voltages of the device on p+-Si and p-Si substrate were 2.2 and 8Â V, respectively. Meanwhile, electroluminescence intensity of the device on p+-Si substrate was five times higher than that on p-Si substrate under the same power supply, which means the heavily doped substrate is helpful for enhancing the carrier injection efficiency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 41, Issue 6, May 2009, Pages 923-926
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 41, Issue 6, May 2009, Pages 923-926
نویسندگان
T. Wang, D.Y. Wei, H.C. Sun, Y. Liu, D.Y. Chen, G.R. Chen, J. Xu, W. Li, Z.Y. Ma, L. Xu, K.J. Chen,