کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7961322 | 1513930 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of non-metal elements (B, C, N, F, P, S) mono-doping as anions on electronic structure of SrTiO3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مکانیک محاسباتی
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چکیده انگلیسی
We present first-principles density-functional calculation for the electric properties of boron (B)-, carbon (C)-, nitrogen (N)-, fluorine (F)-, phosphorus (P)-, and sulfur (S)-doped SrTiO3. The obtained results indicate that the bands originating from B (C, N, F) 2p or P 3p states appear in the band gap of SrTiO3, but the mixing of B (C, N, F) 2p or P 3p states with O 2p states is too weak to produce a significant band gap narrowing. Only in S-doped SrTiO3 case, the S 3p states mix well with the O 2p states and increase the width of valence-band (VB) of SrTiO3 which can produce the really band gap narrowing. Our results fully explain the absorption of visible light is due to the B (C, N, F) 2p or P 3p isolate states above the VB maximum of SrTiO3, while for S-doped SrTiO3 the visible light absorbance originating from the mixing of S 3p states with O 2p states which causing the band gap narrowing. We also propose that N (S)-doped SriO3 would be the best choice for single anion doping SrTiO3, while the B (C, P) elements may be the better candidates for co-doping.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 79, November 2013, Pages 69-74
Journal: Computational Materials Science - Volume 79, November 2013, Pages 69-74
نویسندگان
Chao Zhang, Yongzhong Jia, Yan Jing, Ying Yao, Jun Ma, Jinhe Sun,