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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Investigation on the microstructure and optical properties of c-axis oriented nanocrystalline hexagonal BN films fabricated by hot-filament chemical vapor deposition
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 cm− 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 1–2, 22 July 2005, Pages 90-93
نویسندگان
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