کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9812527 | 1518115 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation on the microstructure and optical properties of c-axis oriented nanocrystalline hexagonal BN films fabricated by hot-filament chemical vapor deposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
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چکیده انگلیسی
Nanocrystalline hexagonal boron nitride (hBN) films are grown on Si(001) substrates by hot-filament chemical vapor deposition. X-ray diffraction analyses indicated that hBN films are highly c-axis oriented and the line width of the (0002) diffraction peak is 1.57°. Fourier transform infrared investigation revealed that the dominant absorption peak of (0001) oriented hBN film is at approximately 1384 cmâ 1, which is from the in-plane B-N stretching vibration mode of hBN. Photoluminescence spectroscopic measurement demonstrates the strong near-band-edge ultraviolet emission centered at 326 nm, which is ascribed to the nanocrystalline nature of hBN film. The optical band gap of hBN film surveyed by photoluminescence excitation is approximately 3.84 eV and is 0.47 eV wider than that of hexagonal ZnO. The wider band gap and the higher chemical stability of c-axis oriented hBN compared with that of wurtzite ZnO would make it a more suitable candidate material in the fabrication of surface acoustic wave devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 484, Issues 1â2, 22 July 2005, Pages 90-93
Journal: Thin Solid Films - Volume 484, Issues 1â2, 22 July 2005, Pages 90-93
نویسندگان
D.J. Qiu,