کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10141447 | 1646070 | 2019 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Piezoelectricity and dipolar polarization of group V-IV-III-VI sheets: A first-principles study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Piezoelectricity can realize the mutual conversion between mechanical energy and electrical energy. With the development of science and technology, the biggest challenge now is to look for the materials with higher efficiency piezoelectric effect. Using first-principles calculations, we study the elastic and piezoelectric properties of the V-IV-III-VI sheets: SiN-AlO, GeN-GaO, and SnN-InO. The Young moduli of these three V-IV-III-VI sheets are much smaller than graphene. Among these three V-IV-III-VI sheets, the in-plane piezoelectric coefficient d11 (12.69â¯pm/V) of SnN-InO is the largest, which is larger than that (3.73â¯pm/V) of molybdenum disulfide (MoS2) by 3 times. SnN-InO also exhibits the largest out-of-plane piezoelectric coefficient d31 (8.66â¯pm/V), which is larger than that (0.46â¯pm/V) of the Janus group-III chalcogenide sheets by 18 times. The broken inversion symmetry and the large electronegativity difference between the atomic top layer and bottom layer of the XN-MO sheet induces the out-of-plane dipolar polarization, leading the out-of-plane piezoelectric effect. The flexible SnN-InO with remarkable out-of-plane piezoelectric properties can be applied in nanoscale energy harvesting devices and nano-sensor in medical devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 463, 1 January 2019, Pages 918-922
Journal: Applied Surface Science - Volume 463, 1 January 2019, Pages 918-922
نویسندگان
Jin-Peng Li, Hao-Jun Jia, Dong-Ran Zhu, Xiao-Chun Wang, Fu-Chun Liu, Yu-Jun Yang,