کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10640137 | 995873 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Production of silicon quantum dots for photovoltaic applications by picosecond pulsed laser ablation
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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
Semiconductor nanocrystals exhibiting strong quantum confinement effects have been produced by picosecond pulsed laser ablation. Crystalline, nanometer-sized Si particles with average sizes ranging from one to five nanometers were collected on both crystalline and glassy substrates. Nanoparticle size can be tuned through variation of the laser pulse energy density and by distance of the collection area from the plume center. Raman spectra of the particles confirm the crystalline nature of the nanoparticles and exhibit significant shifts due to phonon confinement effects. Optical absorption spectra of Si nanoparticles show absorption onsets ranging from 1.7Â eV to 3.0Â eV. These properties, combined with relatively narrow measured size distributions, make these quantum dots excellent candidates for inclusion in nanocomposite solar cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 116, Issue 3, 15 February 2005, Pages 273-277
Journal: Materials Science and Engineering: B - Volume 116, Issue 3, 15 February 2005, Pages 273-277
نویسندگان
M.H. Wu, R. Mu, A. Ueda, D.O. Henderson, B. Vlahovic,